Entries |
Document | Title | Date |
20080252992 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - An object is to provide: a zoom lens system that has a reduced overall length, a high resolution, and a variable magnification ratio as high as 9 or greater and that is satisfactorily adaptable for wide-angle image taking where the view angle at a wide-angle limit is 70° or greater; an imaging device employing this zoom lens system; and a thin and compact camera. The zoom lens system has a plurality of lens units each composed of at least one lens element, and, in order from the object side to the image side, comprises a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit and a fifth lens unit. In zooming from a wide-angle limit to a telephoto limit at the time of image taking, at least the first lens unit and the second lens unit move in an optical axis direction, while the fourth lens unit and the fifth lens unit are each composed of one lens element. An imaging device and a camera employ this zoom lens system. | 10-16-2008 |
20080304161 | ZOOM LENS AND IMAGE SENSING APPARATUS - A zoom lens for forming an optical image of an object on a sensing surface of an image sensor at a variable magnification has first, second, third, fourth and fifth lens groups with positive-negative-positive-negative-positive zoom arrangement. Between the second lens group and the fourth lens group, an optical aperture stop is located. The fourth lens group is composed of one negative lens element having at least one aspherical surface and having a paraxial radius of curvature of an image side surface smaller than a paraxial radius of curvature of an object side surface, and satisfies conditional formula −1.1512-11-2008 | |
20080304162 | ZOOM LENS AND IMAGE PROJECTION APPARATUS HAVING THE SAME - A zoom lens includes a first lens unit having a negative optical power located closest to an enlargement side. In the zoom lens, a focal length of the zoom lens at a wide-angle end (fw) and a focal length of the first lens unit (f1) satisfy the following condition: | 12-11-2008 |
20080316615 | Image capturing device and method for compensating light attenuation of same - An image capturing device includes a zoom lens system, an image sensor for capturing images, and a compensating system for compensating the light attenuation of the image capturing device caused by the zoom lens system. The compensating system includes a memory unit, a judging unit, and a compensating unit. The memory unit is configured for storing a plurality of compensating expressions associated with predetermined focal lengths of the zoom lens system. The judging unit is configured for determining the focal length of the lens system when the image sensor capturing an image. The compensating unit is used for compensating for the light attenuation of the image capturing device using the compensating expression associated with the focal length determined by the judging unit. | 12-25-2008 |
20080316616 | PROJECTING ZOOM LENS AND PROJECTION TYPE DISPLAY DEVICE - A projecting zoom lens includes in order from a magnification side, a first negative group, second, third and fourth positive groups, a fifth negative group and a sixth positive group. The third group, the fourth group and the fifth group are moved along the optical axis to the magnification side during zooming from the wide-angle end to the telephoto end, and such that the projecting zoom lens satisfies given following conditional expressions. | 12-25-2008 |
20090002840 | Zoom lens and imaging system using the same - The invention relates to a zoom lens that enables an optical path to be easily bent by a reflecting optical element, has a wide-angle design and high optical performance as represented by a high zoom ratio of about 3.4, is extremely slimmed down in the depth direction, and costs less. The zoom lens comprises a positive first lens group G | 01-01-2009 |
20090052051 | OPTICAL SYSTEM, IMAGING APPARATUS, AND METHOD FOR FORMING IMAGE BY THE OPTICAL SYSTEM - Providing an optical system having excellent optical performance with sufficiently correcting spherical aberration and curvature of field, an imaging apparatus, and a method for forming an image by the optical system. The optical system includes a plurality of lens groups, at least one of the plurality of lens groups having an A lens that satisfies at least one of given conditional expressions. | 02-26-2009 |
20090059387 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a subsequent lens-unit set including at least one lens units. Intervals between the lens units change during zooming. The first lens unit includes a negative lens element, an optical element, and a positive lens element. Various parameters are set appropriately, including the Abbe number νn and the partial dispersion ratio θgF of a material composing the optical element, the focal length f | 03-05-2009 |
20090067060 | ZOOM LENS, CAMERA APPARATUS, AND PORTABLE INFORMATION TERMINAL APPARATUS - A zoom lens comprises a first lens group G | 03-12-2009 |
20090086334 | ZOOM LENS, OPTICAL APPARTUS EQUIPPED WITH THE ZOOM LENS AND METHOD FOR FORMING AN IMAGE OF AN OBJECT AND VARYING A FOCAL LENGTH - A zoom lens comprises the following lens groups in the order from an object side a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a positive refracting power; and a fifth lens group having a positive refracting power; wherein, upon zooming from a wide-angle end state to a telephoto end state, at least the first lens group and the fourth lens group move to the object side to vary a space between the first lens group and the second lens group, vary a space between the second lens group and the third lens group, vary a space between the third lens group and the fourth lens group, and vary a space between the fourth lens group and the fifth lens group; and wherein the fifth lens group comprises a front lens group, and a rear lens group arranged with an air space on an image side of the front lens group, and the fifth lens group is configured to move the front lens group in a direction of an optical axis to adjust focus to a close object. | 04-02-2009 |
20090116119 | COMPACT ZOOM LENS - Provided is a zoom lens. The zoom lens includes a first lens group with a positive refractive power, a second lens group with a negative refractive power, a third lens group with a positive refractive power, a fourth lens group with a negative refractive power, and a fifth lens group with a positive refractive power. The first through fifth lens groups are sequentially arranged toward an image side from an object side, and the second, fourth, and fifth lens groups move long the optical axis during zooming. | 05-07-2009 |
20090128923 | HIGH POWER ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS - A high power zoom lens system includes, in order from the object side: a first lens group having a positive refractive power and remaining stationary during zooming; a second lens group having a negative refractive power and moving during zooming; a third lens group and a fourth lens group having a positive refractive power and being movable relative to each other to correct image plane variation accompanied by zooming; and a fifth lens group having a positive refractive power and including an aperture diaphragm, the fifth lens group being used for forming an image. The second lens group and a composite lens group formed by combining the third lens group and the fourth lens group pass simultaneously through −1×magnification points of the groups during zooming from a wide-angle end to a telephoto end. The fourth lens group has at least one aspheric surface. | 05-21-2009 |
20090161227 | ZOOM OPTICAL SYSTEM, OPTICAL INSTRUMENT INCORPORATING THE ZOOM OPTICAL SYSTEM, AND METHOD OF MANUFACTURING THE ZOOM OPTICAL SYSTEM - A zoom optical system has a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a negative refracting power; and a fifth lens group having a positive refracting power, in the order from the object side. The fourth lens group is composed of a cemented lens of a negative lens and a positive lens in the order from the object side, and a condition of the following expression is satisfied: vp> | 06-25-2009 |
20090195885 | Zoom lens - The invention is directed to inner-focusing zoom lenses that include multi groups of lens pieces, namely, the first lens group or the leading lens group of positive refractivity, the second lens group of negative refractivity, and the remaining trailing groups of positive refractivity, as a whole. At least one group of positive refractivity among the trailing groups includes two or more negative lens pieces, at least one of which is connected on its surface to another lens piece to form a duplicated composite lens so that the junction between two of them functions to diverge incident beams. Assuming now that a sum of the refractivities of all the junctions of the composite lenses can be expressed as Σφ=Σ|(N1−N2)/R| where N1 and N2 are refractivities that substances before and after the junction of the composite lenses respectively have, R is a radius of curvature of the junction, ft is a focal length of the comprehensive lens optics of the zoom lens at the telephoto end. | 08-06-2009 |
20090207499 | Zoom lens and image pickup apparatus using the same - A zoom lens, which changes a magnification by properly changing distances between a plurality of lens components, has, in order from the object side, a first lens component with positive power, a second lens component with negative power, a third lens component with positive power, a fourth lens component with positive power, and a fifth lens component with positive power, and the first lens component has a reflecting member changing an optical path. The zoom lens satisfies the following conditions: | 08-20-2009 |
20090207500 | Zoom lens and image pickup apparatus using the same - A zoom lens is such that spacings between a plurality of lens units are properly changed and thereby the magnification of the zoom lens is changed. The most object-side lens unit of this zoom lens has a positive refracting power and comprises, in order from an object side, a negative lens, a reflecting member for changing an optical path, and a positive lens, without cementing the reflecting member and the positive lens as well as the reflecting member and the negative lens, and at least one of surfaces of the negative lens and the positive lens is configured as an aspherical surface to satisfy the following condition: | 08-20-2009 |
20090231725 | Zoom lens and image pickup apparatus - A zoom lens includes first to fifth lens groups respectively having positive, negative, positive, positive, and negative refractive powers in that order from the object side. Zooming is performed by moving the second lens group and the fourth lens group in an optical-axis direction. The first lens group includes a front lens group having a negative refractive power, an optical member for bending an optical path, and a rear lens group having a positive refractive power in that order from the object side. The front lens group is a cemented lens in which a first lens having a negative refractive power is bonded to a second lens having a positive refractive power in that order from the object side to the image side. | 09-17-2009 |
20090262437 | PROJECTION ZOOM LENS SYSTEM AND PROJECTION TYPE DISPLAY APPARATUS - A projection zoom lens includes a first lens group having a negative reflecting power and a second to fifth lens groups each having a positive reflecting power are provided in the order from the magnification side. Nine lenses are distributed in a manner that the first lens group has one lens, the second lens group has one lens, the third lens group has two lenses, the fourth lens group has four lenses and the fifth lens group has one lens. Since the second lens group, the third lens group and the fourth lens group are moved at the time of the power-varying operation, various kinds of aberrations may be made despite of simple configuration. The first lens group is an aspherical lens which concave surface is directed to the reduction side. | 10-22-2009 |
20090290228 | Zoom Lens - A zoom lens includes, in order from an object side thereof: a first lens group with a positive refractive power; a second lens group with a negative refractive power; a third lens group with a positive refractive power; a fourth lens group with a negative refractive power; and a fifth lens group with a positive refractive power. A power of the zoom lens is varied by changing intervals between neighboring lens groups in the first through fifth lens groups. The second lens group includes a cemented lens consisting of one positive lens and one negative lens, and the third lens group includes a cemented lens consisting of two positive lenses and one negative lens. | 11-26-2009 |
20090323197 | PROJECTION LENS AND PROJECTOR - An object of the invention is to provide a projection lens capable of sufficiently correcting lateral chromatic aberration at both of the wide-angle end and the telephoto end, with an increased zoom ratio, a less number of lens elements, and less variation in telecentricity. | 12-31-2009 |
20100020409 | ZOOM LENS, IMAGING APPARATUS AND MOBILE PHONE - A zoom lens includes a first lens group having a negative refractive power, a second lens group including a prism which has no refractive power and deflects an optical path, a third lens group that has a positive refractive power and is moved during zooming, a fourth lens group that has a negative refractive power and is moved during zooming, and a fifth lens group having a positive refractive power arranged in this order from an object side. A zoom group including the third positive lens group and the fourth negative lens group, not a fixed positive lens group, is provided on the rear side of the prism. The first lens group includes two negative lenses. | 01-28-2010 |
20100033835 | Optical lens displacement systems - The present invention provides optical systems, devices and methods which utilize one or more electroactive polymer actuators to adjust an optical parameter of the optical device or system. | 02-11-2010 |
20100033836 | Variable focal length lens system - A variable focal length lens system includes: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a negative refracting power; a fifth lens group having a negative refracting power; and a sixth lens group having a positive refracting power; the first to sixth lens groups being disposed in order from an object side. | 02-11-2010 |
20100033837 | OPTICAL APPARATUS - An optical apparatus includes an optical system in which two zoom lens units perform zooming in different ranges in accordance with a zoom position, and a mechanism for driving the two zoom lens units by a single driving portion. An urging force for urging moving members toward an interlocking movement member that is moved along the optical axis by a feed screw is cut off by regulating portions. | 02-11-2010 |
20100073777 | PHOTOGRAPHIC LENS SYSTEM AND ELECTRONIC IMAGING DEVICE USING THE SAME - A photographic lens system includes a positive lens element, a positive lens element, a negative lens element having a concave surface facing toward the image, a diaphragm, a negative lens element having a concave surface facing toward the object, a positive lens element which is cemented to the negative lens element, and two or three positive lens elements, in this order from the object. An intermediate negative lens element, having the weakest negative refractive power out of all of the negative lens elements, is provided between the negative lens element having the concave surface facing toward the image and the negative lens element having the concave surface facing toward the object. | 03-25-2010 |
20100123956 | ZOOM LENS AND CAMERA HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a reflection unit including a reflection surface for bending an optical path, a third lens unit having a negative refractive power, a fourth lens unit having a positive refractive power, and a fifth lens unit having one of a positive refractive power and a negative refractive power. In the zoom lens, at least the second lens unit and the fourth lens unit move during zooming while the reflection unit remains stationary. In addition, a focal length of the first lens unit and respective focal lengths of the zoom lens at a wide-angle end and at a telephoto end are appropriately set. | 05-20-2010 |
20100165479 | LENS DRIVING APPARATUS, OPTICAL APPARATUS AND CONTROL METHOD FOR LENS DRIVING APPARATUS - The lens driving apparatus moves a magnification-varying lens and moves a focus lens to compensate for image plane variation caused by movement of the magnification-varying lens. The apparatus includes a zoom operating member, a stepping motor, a zoom controller controlling drive of the stepping motor, a focus actuator moving the focus lens, a focus controller controlling drive of the focus actuator, a memory storing cam data to compensate for the image plane variation, and a zoom position detector. During a magnification variation operation, the zoom controller performs open-loop control of the drive of the stepping motor based on an operation amount of the zoom operating member, and the focus controller controls the drive of the focus actuator based on the actual position of the magnification-varying lens detected by the zoom position detector, and the cam data. | 07-01-2010 |
20100195215 | HIGH ZOOM-RATIO ZOOM LENS SYSTEM - A high zoom-ratio zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a positive fifth lens group, and a negative sixth lens group, in this order from an object. | 08-05-2010 |
20100214666 | LENS BARREL AND IMAGE CAPTURING APPARATUS - Provided is a lens barrel comprising a fixed cylinder; an optical system having a first optical component that moves relative to the fixed cylinder; a first holding frame that holds the first optical component; a guide axle that is connected to the first holding frame and that extends parallel to an optical axis of the optical system; a linear drive unit operable to move the guide axle in the direction of the optical axis and to fix the position of the guide axle; and a holding cylinder that holds the linear drive unit, the holding cylinder being fixed to the fixed cylinder with respect to the direction of the optical axis when the linear drive unit moves the guide axle and moving relative to the fixed cylinder in the direction of the optical axis when the linear drive unit holds the guide axle. | 08-26-2010 |
20100214667 | ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND ZOOMING OPTICAL SYSTEM MANUFACTURING METHOD - The present invention has at least a first lens group G | 08-26-2010 |
20100220398 | Variable-focal-length lens system and imaging apparatus - A variable-focal-length lens system includes first to fifth lens groups having positive, negative, positive, negative, and positive refractive powers, respectively, from the object side. As the lens-position state changes from wide-angle to telephoto, the air space between the first and second lens groups increases, the air space between the second and third lens groups decreases, the air space between the third and fourth lens groups changes, the air space between the fourth and fifth lens groups increases, the first lens group moves monotonously toward the object, the second lens group is fixed in the optical-axis direction, and the third and fourth lens groups move toward the object. Conditions 0.209-02-2010 | |
20100232032 | IMAGING APPARATUS, IMAGING METHOD AND HIGH ZOOM RATIO ZOOM LENS SYSTEM - Providing an imaging apparatus capable of efficiently using effective pixels of a solid-state imaging device, and securing excellent peripheral light quantity of an image even upon vibration reduction. The imaging apparatus comprising: a high zoom ratio zoom lens | 09-16-2010 |
20100232033 | OBJECTIVE LENS FOR ENDOSCOPE - An objective lens for an endoscope is provided and has a lens group A and a lens group B that are movable in a direction of an optical axis. In the objective lens, first focal adjustment for observing a point between a most-distant point and an intermediate point is performed by moving the lens group A from a lens arrangement for observing the most-distant point; and second focal adjustment for observing a point between the intermediate point to a nearest point is performed by moving the lens group B from a lens arrangement for observing the intermediate point. | 09-16-2010 |
20100238561 | Image forming optical system and electronic image pickup apparatus using with the same - There is provided a zoom lens with a wide angle of view at the wide angle end and a high zoom ratio that has good imaging performance throughout the entire zoom range with chromatic aberrations being corrected favorably. In a zoom lens including, in order from the object side to the image side, a first lens group having a positive refracting power, a second lens group having a negative refracting power, and an image side lens group having a positive refracting power, in which the distance between the first lens group and the second lens group changes during zooming, wherein a refractive optical element A that has a positive refracting power if its object side surface and its image side surface are interfaces with air is provided between an object side base optical element B and an image side base optical element C to constitute therewith a three-piece cemented optical element D in the first lens group, there is at least one optical element having a positive refracting power disposed closer to the object side than the three-piece cemented optical element D, and the zoom lens satisfies a certain condition. | 09-23-2010 |
20100284092 | VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL APPARATUS PROVIDED WITH THE VARIABLE MAGNIFICATION OPTICAL SYSTEM AND METHOD FOR MANUFACTURING VARIABLE MAGNIFICATION OPTICAL SYSTEM - A variable magnification optical system ZL has, in order from the object side, a first lens unit G | 11-11-2010 |
20100290130 | IMAGING LENS SYSTEM AND IMAGING APPARATUS USING THE SAME - An imaging lens system has an autofocus function using a liquid lens and an imaging apparatus using the imaging lens system in which the imaging lens system is configured with a smaller number of lenses to facilitate downsizing. The imaging lens system includes a first lens group and a second lens group in this order from the object side. The second lens group includes a liquid lens system in which the curvature radius of the interface between a conductive liquid and an insulating liquid changes depending on an applied voltage. The curvature center of the interface between the conductive liquid and the insulating liquid of the liquid lens system is shifted toward the conductive liquid. | 11-18-2010 |
20100302648 | ZOOM LENS WITH HIGH OPTICAL PERFORMANCE AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens comprises a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a rear group including at least two lens units and having a positive refractive power as a whole, in order from an object side to an image side. An interval of each of the lens units changes in a zoom operation, the rear group includes a lens unit R having a positive refractive power at the most image side, the lens unit R includes a lens having a concave surface at the image side and having an aspherical surface shape where a negative refractive power becomes stronger with increasing distance from an optical axis, and focal lengths f | 12-02-2010 |
20100321790 | ZOOM LENS AND CAMERA WITH THE SAME - The zoom lens is a retractable bent-type zoom lens capable of providing a high zoom ratio and a reduced thickness, and capable of retracting into a camera body with an easily-configured mechanism. The zoom lens includes in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a prism including a reflective surface, and a posterior lens group which includes plural lens units and has as a whole a positive refractive power. The first and second lens units are retractable into a space formed by movement of the prism in a direction orthogonal to an optical axis of the first lens unit, and, during zooming, the second lens unit and the plural lens units in the posterior lens group are moved while the first lens unit and the prism are fixed. | 12-23-2010 |
20110002045 | ZOOM LENS - A zoom lens includes sequentially from an object side, a positive first lens group; a negative second lens group; a diaphragm; a positive third lens group; a positive fourth lens group; and a positive fifth lens group, wherein a first condition 0.8≦(SLM−(SLW+SLT)/2)/FW≦2.0 and a second condition F14t≦0 are satisfied. SLW is a distance from the diaphragm at a wide angle edge to an imaging plane; SLM is a distance from the diaphragm at an intermediate zoom position to the imaging plane; SLT is a distance from the diaphragm at a telephoto edge to the imaging plane; FW is optical system focal length for infinity at the wide angle edge; and F14t is a combined focal length for the first to the fourth lens groups at the telephoto edge. | 01-06-2011 |
20110002046 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME - An optical system having a larger total lens length than a focal length includes lenses L and NL at least one of a magnification conjugate side and a reduction conjugate side with respect to an aperture stop. The lens L satisfies conditional expressions as follows, | 01-06-2011 |
20110026133 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear group including at least one lens unit. For zooming from a wide angle end to a telephoto end, the first lens unit moves to the object side, the second lens unit moves to the image side, and the third lens unit moves to the object side. Moving amounts of the first lens unit, the second lens unit, and the third lens unit for zooming from the wide angle end to the telephoto end and focal lengths of the second lens unit and the third lens unit are set based on predetermined conditions. | 02-03-2011 |
20110032625 | ZOOM LENS SYSTEM AND CAMERA INCLUDING THE SAME - Provided is a zoom lens system including, in order from an object side to an image side: a first lens unit having a positive optical power; a second lens unit having a negative optical power; a third lens unit having a positive optical power; a fourth lens unit having a negative optical power; and a fifth lens unit having a positive optical power. In this zoom lens system, magnification sharing between the fourth lens unit and the fifth lens unit, and a movement amount of the second lens unit as a principal magnification lens unit are set appropriately, so as to realize a high zoom ratio and high optical performance over an entire zoom range. | 02-10-2011 |
20110051256 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an aperture stop, a third lens unit having a positive refractive power, and a rear group including at least one lens unit. During zooming from a wide angle end to a telephoto end, the first and third lens units move to the object side, the second lens unit moves to the image side, and the aperture stop moves to the object side along a convex path. Radii of curvature of object- and image-side lens surfaces of a lens closest to the object side in the second lens unit, focal lengths of the entire zoom lens at the wide angle end and the telephoto end, and focal lengths of the first and second lens units are set properly. | 03-03-2011 |
20110051257 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side to an image side, first and second lens units respectively having positive and negative refractive powers, a reflecting prism for bending an optical path, and a rear lens group including lens units. At least the first and second lens units move for zooming. During retraction into a storage state, the prism moves to a position different from a position in an image taking state, and at least a part of the first and second lens units is retracted into a space formed by movement of the prism. Thicknesses of the first and second lens units, a moving amount of the first lens unit during zooming from a wide angle end to a telephoto end, a focal length of the first lens unit, and a focal length of the entire zoom lens at the telephoto end are set properly. | 03-03-2011 |
20110080650 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens system comprises, from an object to an image side: a first, a second, a third, a fourth, and a fifth lens units, wherein all units move during zooming so that an interval between the first and second lens units is larger, an interval between the second and third lens units is smaller, an interval between the fourth and fifth lens units is larger, at a telephoto end than those at a wide angle end, and an interval between the third and fourth lens units varies; and a focal length of the second lens unit, a focal length of an entire system at the wide angle end, a movement amount of the fourth lens unit in zooming from wide angle end to telephoto end, and intervals between the third and fourth lens units at the wide angle end and at the telephoto end are set appropriately. | 04-07-2011 |
20110080651 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side, a positive first lens unit without moving for zooming, a negative second lens unit for magnification, a positive third lens unit for magnification, a negative fourth lens unit compensating for image plane variation due to magnification, and a positive fifth lens unit without moving for zooming. When assuming a focal length of the entire system at a wide angle end as fW, and a zoom ratio as Z, a focal length fM at an intermediate zoom position is expressed by the equation: fM=fW×√Z. When assuming an interval between the second and third lens units at the wide angle end as L | 04-07-2011 |
20110080652 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING SAME - A zoom lens includes, in order from an object side to an image side and arranged along an optical axis, first to fifth lens units having positive, negative, positive, positive or negative, and positive refractive power, respectively. When zooming, the second lens unit moves monotonically to the image side, the third lens unit moves to the object side in a convex locus, the fifth lens unit moves nonlinearly, and the first and fourth lens units do not move. The fourth lens unit includes a first sub lens unit and a second sub lens unit; the first sub lens unit is an image-stabilizing lens unit that includes a first lens having negative refractive power and a second lens having positive or negative refractive power. The focal length of the fourth lens unit, the focal length of the entire system at the wide-angle end, the Abbe numbers of the materials of the first and second lenses are set appropriately based on predetermined conditions. | 04-07-2011 |
20110080653 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens system comprises, from an object side to an image side: a first lens unit; a second lens unit; a third lens unit; a fourth lens unit; and a fifth lens unit having positive refractive power, wherein: in zooming from a wide angle end to a telephoto end, the first, the second, the third, and the fourth lens units move so that an interval between the first and the second lens units is larger at the telephoto end than that at the wide angle end, an interval between the second and the third lens units is smaller at the telephoto end than that at the wide angle end, and a distance between the third and the fourth lens units varies; and a focal length of the first lens unit, and focal lengths of an entire system at the wide angle end and the telephoto end are appropriately set. | 04-07-2011 |
20110085247 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - A zoom lens system, in order from an object side to an image side, comprising a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, and subsequent lens units including a fourth lens unit having optical power, wherein any one of the first lens unit, the second lens unit, the third lens unit, and the subsequent lens units includes a lens element having a reflecting surface that bends a light beam incident from an object, wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, the first lens unit and the third lens unit do not move along an optical axis, and wherein the condition is satisfied: 1.4204-14-2011 | |
20110085248 | Variable focal length lens system and image pickup device - Disclosed herein is a variable focal length lens system including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The first to the fifth lens groups are arranged in order from an object side. The variable focal length lens system satisfies following conditional expressions (1) to (3): | 04-14-2011 |
20110102905 | ZOOM OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM OPTICAL SYSTEM - A zoom optical system comprising, in order from an object side: a first lens group G | 05-05-2011 |
20110109977 | OPTICAL SYSTEM, IMAGING APPARATUS, AND METHOD FOR FORMING IMAGE BY THE OPTICAL SYSTEM - Providing an optical system having excellent optical performance with sufficiently correcting spherical aberration and curvature of field, an imaging apparatus, and a method for forming an image by the optical system. The optical system includes a plurality of lens groups, at least one of the plurality of lens groups having an A lens that satisfies at least one of given conditional expressions. | 05-12-2011 |
20110122506 | VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL APPARATUS PROVIDED WITH SAME AND METHOD FOR VARIABLE MAGNIFICATION USING VARIABLE MAGNIFICATION OPTICAL SYSTEM - A variable magnification optical system ZL to be mounted on an electronic still camera | 05-26-2011 |
20110141576 | LENS OPTICAL SYSTEM AND DIGITAL CAMERA MODULE INCLUDING THE SAME - A lens optical system includes a first optical system which includes, in order from an object side to an image side along an optical axis, a first lens group having a positive refractive power and including a first reflection member to redirect an optical path of light representing an object from a first direction toward an image sensor, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. During zooming from a wide mode to a tele mode, the first lens group and the fifth lens group are fixed, the second lens group moves toward the image side, the third lens group and the fourth lens group move toward the object side, and the fourth lens group performs focusing. | 06-16-2011 |
20110141577 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object-side to an image-plane-side: a positive first lens unit; a negative second lens unit; a stop; a positive third lens unit; a negative fourth lens unit; and a positive fifth lens unit, wherein: during zooming, the first lens unit moves along a locus convex toward the image-plane-side, the second lens unit moves toward the image-plane-side, and the stop moves; at the telephoto end compared with the wide angle end, an interval between the first lens unit and the second lens unit increases, an interval between the second lens unit and the third lens unit decreases, and an interval between the aperture stop and the third lens unit decreases, focal lengths of the fourth lens unit, a focal length of an entire system at the telephoto end, and a movement amount of the first lens unit are appropriately set. | 06-16-2011 |
20110149412 | ZOOM LENS, OPTICAL APPARATUS WITH THE ZOOM LENS, AND METHOD OF MANUFACTURING ZOOM LENS - A zoom lens ZL, which is mounted on an electronic still camera | 06-23-2011 |
20110157717 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - Provided is a zoom lens including, in order from an object side to an image side: a positive first lens unit having two positive lenses and a negative lens; a negative second lens unit having positive and negative lenses; a positive third lens unit; and a rear group including lens unit, wherein: with respect to a wide angle end, at a telephoto end, intervals between the first and second lens units, the second and third lens units, and the third lens unit and the rear group respectively change; and a focal length and an Abbe number of a material of the positive lens of the first lens unit that has a largest Abbe number among positive lenses, a refractive index and an Abbe number of a material of the positive lens of the second lens unit, and a focal length of the first lens unit are set appropriately. | 06-30-2011 |
20110157718 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A small zoom lens having a high zoom ratio and high optical performance over an entire zoom range is obtained. The zoom lens includes, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a negative refractive power; and a fifth lens unit having a positive refractive power, wherein intervals between the first lens unit, the second lens unit, the third lens unit, the fourth lens unit, and the fifth lens unit are changed during zooming, in which a focal length (fw) of an entire system at a wide angle end and a focal length (fn) of an n-th lens unit are set appropriately. | 06-30-2011 |
20110176223 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a subsequent lens unit including at least two lens units. An interval between respective adjacent lens units varies for zooming. The first lens unit includes a positive lens and a negative lens. A deviation, from a standard line, of a material of a negative lens GLn, whose relative partial dispersion of a material (θgF) is the lowest of relative partial dispersions of materials of other lenses included in the first lens unit (ΔθgF | 07-21-2011 |
20110176224 | ZOOM LENS, OPTICAL APPARATUS HAVING SAME, AND METHOD OF MANUFACTURING ZOOM LENS - The present invention relates to a zoom lens which can shift images using a movable optical system so as to have components orthogonal to the optical axis, and can correct hand motion blur, and minimizes the deterioration of performance while attempting higher variable power. | 07-21-2011 |
20110188129 | LENS CONTROL DEVICE HAVING LENS POSITION CONTROL FUNCTION FOR BRINGING, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM - A lens control device which is capable of controlling lens positions such that an in-focus state of an object image can be maintained even when a variable power lens is positioned outside a normal zoom range from a wide-angle end to a telephoto end. A flash memory stores a positional relationship between the variable power lens and a focus lens, on an object distance-by-object distance basis. A system controller controls the movement of the focus lens by calculating the in-focus position of the focus lens with respect to the position of the variable power lens based on the positional relationship stored in the flash memory when the variable power lens is moved to a position outside the normal zoom range defined in the positional relationship stored in the flash memory. | 08-04-2011 |
20110222166 | COMPACT ZOOM LENS - A zoom lens includes, in order from an object side to an image plane side, a first lens group fixed to the image plane during zooming, having a positive refractive power, and including a single lens having a negative refractive power, an optical path change member for changing an optical path, and a positive lens group having a positive refractive power, which are arranged in order from the object side, a second lens group having a negative refractive power and including a negative lens group and a positive lens group which are arranged in order from the object side with an air gap, a third lens group fixed to the image plane during zooming and having a positive refractive power, and at least one lens group having a positive refractive power. The zoom lens satisfies the conditions the 1.4<|fLG1/fw|<5.8 and −4.809-15-2011 | |
20110228406 | ZOOM LENS SYSTEM, OPTICAL DEVICE WITH THE ZOOM LENS SYSTEM, AND METHOD OF MANUFACTURING THE ZOOM LENS SYSTEM - A zoom lens system has a front lens group and a rear lens group along the optical axis and in order from the object side. The rear lens group has a first lens unit having a positive refracting power, a second lens unit having a negative refracting power, and a third lens unit having a positive refracting power. Upon zooming from a wide-angle end state to a telephoto end state, a space between the front lens group and the first lens unit varies, a space between the first lens unit and the second lens unit increases, and a space between the second lens unit and the third lens unit decreases. At least a part of the second lens unit is movable so as to have a component in a direction perpendicular to the optical axis. | 09-22-2011 |
20110261467 | ZOOM LENS, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM LENS - A zoom lens ZL including an optical element P for deflecting an optical path, including, in order from an object: a first lens group G | 10-27-2011 |
20110267705 | Image forming optical system and electronic image pickup apparatus equipped with same - An image forming optical system has a positive lens group disposed closer to its object side than an aperture stop, and the values of θgF1 and other constants of at least one lens LA included in the positive lens group fall within three ranges including a range bounded by the straight lines given by the equation θgF1=α1×νd1+βgF1 (where α1=−0.00566) into which the lowest and highest values in the range given by a first conditional expression are substituted respectively, a range bounded by the straight lines given by the equation nd1=a1×νd1+b1 (where a1=−0.0267) into which the lowest and highest values in the range given by a second conditional expression are substituted respectively, and a range defined by a third conditional expression. | 11-03-2011 |
20110286104 | Image forming optical system and electronic image pickup apparatus using the same - A zoom lens including, in order from the object side to the image side, a first lens group including a positive refractive power, a second lens group having a negative refractive power, an image side lens group having a positive refractive power, wherein the distance between the first lens group and the second lens group changes during zooming, and a refractive optical element A, which has a positive refractive power when its object side surface and image side surface are exposed to air, is provided in the first lens group and located closest to the object side in the first lens group, and the refractive optical element A is cemented together with an optical element B. The Abbe constant νd and the relative partial dispersion θgF of the refractive optical element A satisfies certain conditions. | 11-24-2011 |
20110286105 | ENHANCED VARIABLE POWER ZOOM LENS - The present invention is directed to provide an enhanced variable power zoom lens that is lightweight as a whole, and especially, has its focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The enhanced variable power zoom lens is adapted to have the foremost or first lens group of positive refractivity, the second lens group of negative refractivity, the third lens group of positive refractivity, the fourth lens group of negative refractivity, and the fifth lens group arranged in this sequence from a position closer to the object where a distance between each pair of the adjacent lens groups is varied during zooming from the wide-angle end to the telephoto end, each lens group comes closer to the object at the telephoto end than at the wide-angle end, the third lens group and the fourth lens group separating the farthest apart from each other at the intermediate zooming range, and the fourth lens group is moved closer to the image plane for shifting from infinity focusing to proximity focusing. | 11-24-2011 |
20110292520 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes a first variable refractive power element that changes a refractive power thereof in a positive direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end; and a second variable refractive power element that changes a refractive power thereof in a negative direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end. An imaging magnification of at least one of the variable refractive power elements increases during zooming from the wide angle end to the telephoto end. Variations in chromatic aberration and other distortions are controlled when predetermined conditional expressions are satisfied. | 12-01-2011 |
20110317279 | ZOOM LENS - A zoom lens includes, in order from an enlargement side to a reduction side, a first lens unit having a positive refractive power, which is stationary for variation of magnification, a second lens unit having a negative refractive power, which moves for variation of magnification, a third lens unit having a negative refractive power, which moves for variation of magnification, a fourth lens unit having a positive refractive power, which includes a stop and which moves for variation of magnification, and at least one lens unit. In the zoom lens, for variation of magnification from a wide-angle end to a telephoto end, the second lens unit and the third lens unit move towards the reduction side and the fourth lens unit move towards the enlargement side. The zoom lens satisfies an appropriate condition. | 12-29-2011 |
20120019928 | ZOOM LENS AND IMAGE PICKUP APPARATUS WITH ZOOM LENS - A zoom lens includes a first lens unit having a negative refractive power and which is provided at a location closest to an object side, a lens unit LP having a positive refractive power, which is provided at a location closest to an image side, and which is stationary during zooming, and a lens unit LN having a negative refractive power, which is provided adjacent to the lens unit LP on the object side of the lens unit LP, and which is configured to move during zooming. In the zoom lens, optical parameters fp, fn, fw, ft, fni and νdni are appropriately set. | 01-26-2012 |
20120019929 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - Provided is a zoom lens system including, in order from an object side to an image side: a first lens unit having positive refractive power; a second lens unit having negative refractive power; a prism for bending an optical path; and a rear group including a plurality of lens units, in which the first lens unit is moved to the object side while the second lens unit is moved to the image side with respect to an imaging plane at a telephoto end compared to at a wide angle end, and movement amounts M | 01-26-2012 |
20120075715 | Zoom lens and electronic imaging apparatus incorporating the same - The zoom lens of the invention comprises, in order from an object side thereof, a first lens group having positive refracting power, a second lens group having negative refracting power, a third lens group having positive refracting power, a fourth lens group having positive refracting power, a fifth lens group having negative refracting power, and a sixth lens group having positive refracting power. The first lens group includes a reflective optical element, and the lens in and on the most image side of the fourth lens group comprises a negative lens concave on its image side. | 03-29-2012 |
20120092776 | ELECTRONIC IMAGE PICKUP SYSTEM - The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-bending zoom optical system comprising, in order from its object side, a 1-1st lens group G | 04-19-2012 |
20120099208 | ZOOM LENS SYSTEM - A zoom lens system is used for imaging an object to an image plane. The system, in the order from the object side to the image plane, includes a first lens group with positive refraction power, a second lens group with negative refraction power, a third lens group with positive refraction power, an aperture stop, a fourth lens group with positive refraction power, and a fifth lens group with negative refraction power. The fifth lens group comprises a lens of negative refraction power and a lens of positive refraction power. The system satisfies the formulas: −0.1804-26-2012 | |
20120176684 | ZOOM LENS AND IMAGE PICKUP APPARATUS - A zoom lens and an image pickup apparatus are disclosed. The zoom lens includes, in order from an object side to an image side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. The fifth lens group includes a fixed group having a negative refractive power, and a movable group having a positive refractive power and being movable in a direction substantially orthogonal to the optical axis. The image formed on an image surface is movable in a direction substantially orthogonal to the optical axis by moving the movable group of the fifth lens group in the direction substantially orthogonal to the optical axis. The fifth lens group is satisfied predetermined conditions. | 07-12-2012 |
20120200940 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from the object side to the image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a rear group including one or more lens units. An aperture stop is included on the image side of the second lens unit, and the second lens unit and at least one of the lens units included in the rear group move during zooming. The Abbe number νdj | 08-09-2012 |
20120229913 | LENS SYSTEM AND IMAGE PICKUP DEVICE EQUIPPED WITH THE SAME - A lens system, from an object side to an image side in the following order, at least includes: a fixed object-side lens group that is disposed closest to the object side; a first focusing lens group that moves during a focusing operation and includes a plurality of lenses; a second focusing lens group that moves during a focusing operation and includes a plurality of lenses; a wobbling lens group that has a smaller thickness on an optical axis than the thickness on the optical axis of the first focusing lens group and the thickness on the optical axis of the second focusing lens group, and vibrates in an optical-axis direction; and a fixed image-side lens group that is disposed closest to the image side. | 09-13-2012 |
20120236418 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens includes: a first lens group having positive refracting power; a second lens group having negative refracting power; a third lens group having positive refracting power; a fourth lens group having positive refracting power; and a fifth lens group having positive refracting power arranged in this order from an object side toward an image side, wherein when the zoom lens undergoes zooming operation from a wide-angle end toward a telescopic end, the first lens group moves away from the second lens group toward an object to be imaged, the third lens group approaches the second lens group toward the object, and the fourth lens group approaches the third lens group toward the object, and the zoom lens satisfies the following conditional expression (1) | 09-20-2012 |
20120236419 | ZOOM LENS, CAMERA DEVICE, AND DATA TERMINAL DEVICE - A zoom lens includes first to fifth lens groups having positive, negative, negative, positive, and positive refractive powers, respectively, arranged along an optical axis in order from an object side, and an aperture stop disposed between the third and fourth lens groups. When zooming from wide angle end to telephoto end, the zoom lens is moved so that an interval between the first and second lens groups increases, an interval between the second and third lens groups varies, an interval between the third and fourth lens groups decreases, and the third lens group focuses. The second lens group is arranged to have a focal length to satisfy the following condition: | 09-20-2012 |
20120250162 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from object side: a positive first lens unit which does not move for zooming; a zoom lens unit including at least two lens units which move for zooming; a stop; and a positive imaging lens unit which does not move for zooming, in which: the first lens unit includes, in order from object side, a positive first sub-lens unit, a negative second sub-lens unit, and a positive third sub-lens unit; the third sub-lens unit includes a movable positive sub-third sub-lens unit; the second sub-lens unit and sub-third sub-lens unit are driven to object side for focusing to a close object; and focal length f12 of the second sub-lens unit, focal length f13f of the sub-third sub-lens unit, drive amount δ×12 of the second sub-lens unit in focusing, and drive amount δ×13f of the sub-third sub-lens unit in focusing satisfy −2.510-04-2012 | |
20120250163 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side: a first lens unit having positive refractive power which does not move for varying magnification; a magnification-varying lens unit including at least two lens units which move for varying magnification; an aperture stop; and an imaging lens unit having positive refractive power which does not move for varying magnification, in which: the first lens unit includes, in order from the object side, a first sub-lens unit having positive refractive power, a second sub-lens unit having negative refractive power, and a third sub-lens unit having positive refractive power; the second sub-lens unit is driven to the object side so as to perform focus adjustment to an object at a short distance; and the following expression is satisfied: 0.0710-04-2012 | |
20120262797 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes an aperture stop and a plurality of lens units which are moved during zooming. The plurality of lens units includes, on an object side of the aperture stop, a lens unit Lp having a positive refractive power and a lens unit Ln having a negative refractive power which is disposed to be adjacent to an image side of the positive lens unit Lp. At least one of the positive lens unit Lp and the negative lens unit Ln includes two or less lenses which are moved during focusing, and a focal length Fp of the positive lens unit Lp and a focal length Fn of the negative lens unit Ln are appropriately set based on predetermined mathematical conditions. | 10-18-2012 |
20120262798 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes a first lens unit, a second lens unit, a third lens unit, a fourth lens unit and a fifth lens unit. In the zoom lens, air intervals L | 10-18-2012 |
20120268830 | ZOOM LENS - An embodiment of this invention provides a zoom lens, which primarily includes, in order from an object side to an image-forming side, a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group having positive refractive power; wherein the first lens group comprises a prism, and the second lens group, the fourth lens group, and the fifth lens group are moved toward the third lens group along an optical axial for zooming from a wide-angle end to a telephoto end. | 10-25-2012 |
20120314297 | ZOOM LENS SYSTEM - A zoom lens system including, in an order from an object to an image: a first lens group having negative refractive power; and a second lens group having positive refractive power, wherein the zoom lens system satisfies equations below: | 12-13-2012 |
20120314298 | ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME - A zoom lens includes in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive, and a last lens group having a positive refractive index, and at the time of zooming from the wide angle end to the telephoto end, the first lens group is fixed, the second lens group moves toward a side of an image plane, the third lens group is fixed, and the fourth lens group moves, and at the time of focusing, the fourth lens group moves. The zoom lens satisfies the following conditional expression (101) | 12-13-2012 |
20130021674 | ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME - A zoom lens includes, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, a negative fifth lens group, and a positive sixth lens group. The first lens group, the third lens group, and the sixth lens group are fixed. The second lens group, fourth lens group, and the fifth lens group are movable. The first lens group includes a reflecting optical element that bends the optical path. The second lens group includes a negative lens and a cemented lens made up of a negative lens and a positive lens. The third lens group includes an aperture stop. The fourth lens group includes a positive lens and a negative lens. The fifth lens group includes a negative lens. | 01-24-2013 |
20130021675 | VARIABLE FILTER COMPENSATION FOR HIGH-APERTURE CAMERA LENSES - The present invention relates to a lens or objective for a camera, more particularly for a digital camera, comprising a housing, an actuating element arranged on the housing, and a lens element system that can be set into a plurality of settings, wherein the lens element system is embodied in such a way that in at least one setting an f-number is F≦3. The lens element system is furthermore embodied in such a way that an actuation of the actuating element brings about a movement of two optical elements relative to one another, such that an intersection length difference of the lens element system can be set. | 01-24-2013 |
20130021676 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH THE ZOOM LENS - A zoom lens includes a first lens unit (positive), a second lens unit (negative), a third lens unit (positive), and a rear lens group having one or more lens units. During zooming from the wide-angle end to the telephoto end, the distance between the first and second lens units increases, the distance between the second and third lens units decreases, and the distance between the third lens unit and the rear lens group changes. The first lens unit consists of a positive lens and a negative lens. The following conditional expressions are satisfied: | 01-24-2013 |
20130033758 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a reflective unit configured to bend an optical axis, and a rear lens group including two or more lens units, the reflective unit being stationary during zooming, the first and second lens units and two or more lens units of the rear lens group being moved during zooming, wherein the following conditions are satisfied: 4.3<β2t/β2w<12.0, and 2.1<βRt/βRw<3.0, where β2w and β2t denote lateral magnifications of the second lens unit at a wide-angle end and a telephoto end, respectively, and βRw and βRt denote lateral magnifications at the wide-angle end and the telephoto end, respectively, of a lens unit having a greatest variable power contribution out of the rear lens group. | 02-07-2013 |
20130038946 | Image Stabilization Zoom Lens - During zooming from the wide angle end to the telephoto end, a first lens unit having a positive refractive power is fixed, a second lens unit having a negative refractive power moves toward the image side, a third lens unit having a positive refractive power moves toward the object side, a fourth lens having a negative refractive power unit moves, and a fifth lens unit having a positive refractive power is fixed. The first lens unit includes a reflecting member that bends the optical path by 90 degrees. The entirety of or at least a part of the fifth lens unit is shifted in directions transverse to the optical axis to stabilize a picked-up image when the optical system vibrates. The zoom lens satisfies the predetermined expressions. | 02-14-2013 |
20130094097 | ZOOM LENS AND OPTICAL APPARATUS - The zoom lens includes a first lens unit being disposed closest to an object and having a positive optical power, and at least one subsequent lens unit being disposed closer to an image than the first lens unit. The first lens unit is moved toward the object during variation of magnification from a wide-angle end to a telephoto end. The first lens unit is constituted by at least three lenses including a positive meniscus lens being disposed closest to the image among the at least three lenses and having an image side concave surface, and a negative lens being disposed on an object side next to the positive meniscus lens. A condition of 1.5504-18-2013 | |
20130100538 | ZOOM LENS ASSEMBLY AND MOBILE TERMINAL THAT INCLUDES A ZOOM LENS ASSEMBLY - A zoom lens assembly may enlarge/reduce an image without shifting a position of a lens set. A housing, a zoom lens unit and a drive unit may be provided. The zoom lens unit may include a plurality of lenses stationarily arranged within the housing by being spaced apart in prescribed distance from each other along an optic axis. The plurality of the lenses respectively have variable refractive indexes without a position shift. The drive unit may pressurize a prescribed one of the lenses to vary the refractive index of the prescribed lens. The controller may control the drive unit to change a focal distance of the zoom lens unit to enlarge or reduce an image. | 04-25-2013 |
20130120852 | ZOOM LENS - A zoom lens includes, from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a subsequent lens unit. The first lens unit includes an optical element composed of an anomalous dispersion optical material, a positive lens, and a negative lens. The shape of the negative lens and the ratio of the Abbe number of the positive lens and the Abbe number of the negative lens satisfy predetermined conditions. | 05-16-2013 |
20130135751 | ZOOM LENS AND INFORMATION DEVICE - A zoom lens includes, in order from an object side to an image side along an optical axis, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a negative refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. | 05-30-2013 |
20130141796 | ZOOM LENS - A zoom lens includes a first lens group, a second lens group, a third lens group, an aperture, a fourth lens group, and a fifth lens group in order along an optical axis from an object side to an image side. The first lens group has positive refractive power, and includes four lenses. The second lens group has negative refractive power, and includes three lenses. The third lens group has positive refractive power, and includes one lens. The fourth lens group has positive refractive power, and includes five lenses. The fifth lens group has positive refractive power, and includes one lens. The zoom lens is switched to the telephoto mode from the wide-angle mode by moving the second lens group and the fourth lens group toward the third lens group. | 06-06-2013 |
20130201564 | LENS SYSTEM, OPTICAL DEVICE WITH LENS SYSTEM, AND METHOD OF MANUFACTURING LENS SYSTEM - A lens system comprises, on a side closest to an object, a first lens component having a positive refractive power and a second lens component having a positive refractive power in order from the object; and on a side closest to an image, a cemented lens constructed by cementing together a positive lens and a negative lens in order from the object; wherein the lens system satisfies the following conditional expressions: | 08-08-2013 |
20130215518 | ZOOM LENS - A zoom lens includes sequentially from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, an aperture stop, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and fifth lens group. The zoom lens further satisfies given conditions. | 08-22-2013 |
20130215519 | Projection Lens and Projector - An aperture stop is arranged on the reduction side of the most reduction-side lens element in a fourth group; during zooming from the tele-end to the wide-end through a middle position that fulfills conditional formula 0.9908-22-2013 | |
20130222921 | ZOOM LENS - A zoom lens includes sequentially from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power. The zoom lens satisfies given conditions to implement a compact, wide angle, large aperture ratio zoom lens having excellent optical performance and compatible with solid state image sensors capable of recording full high vision images. | 08-29-2013 |
20130222922 | ZOOM LENS, IMAGING DEVICE, AND PORTABLE DIGITAL DEVICE - A zoom lens includes, in order from an object side along an optical axis, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a negative refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power, wherein with a change in a magnification from a wide-angle end to a telephoto end, an interval between the first lens group and the second lens group is increased, the interval between the second lens group and the third lens group is changed, the interval between the third lens group and the fourth lens group is decreased, the interval between the fourth lens group and the fifth lens group is decreased, and focusing is performed by the third lens group. | 08-29-2013 |
20130235466 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, from the object side to the image side, first to sixth lens units having positive, negative, positive, negative, positive, negative refracting powers. In zooming from the wide angle end to the telephoto end, the lens units are moved such that the distance between the first and second lens units increases, the distance between the second and third lens units decreases, the distance between the third and fourth lens units increases, and the distance between the fourth and fifth lens units decreases. In focusing from an infinitely distant object to a near object, the sixth lens unit is moved toward the image side. The distance between the rear principal point of the second lens unit and the front principal point of the rear lens group at the wide angle end, and the focal length of the rear lens group at the wide angle end are appropriately set. | 09-12-2013 |
20130242408 | ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME - A zoom lens includes first to fifth lens units arranged sequentially from object to image sides and having respective refractive powers. Compared to a wide-angle end, at a telephoto end, the distance between the first and second lens units, the distance between the third and fourth lens units, and the distance between the fourth and fifth lens units are increased, and the distance between the second and third lens units is decreased. Compared to the wide-angle end, at the telephoto end, the first lens unit is positioned closer to the object side. The first and second lens units each consist of a positive lens element and a negative lens element. The distances between the third and fourth lens units at the wide-angle and telephoto ends D | 09-19-2013 |
20130271848 | PROJECTION ZOOM LENS AND PROJECTION APPARATUS - Composing a projection zoom lens with a first lens group disposed on the most magnification side and having a positive power, the lens group being fixed at the time of zooming, a final lens group disposed on the most reduction side and having a negative power, the lens group being fixed at the time of zooming, and a plurality of lens groups disposed between the first and final lens groups and moved at the time of zooming along an optical axis in association with each other for the zooming and correction of image plane shift arising from the zooming, in which the final lens group includes a lens having a positive power on the most reduction side. | 10-17-2013 |
20130279018 | ZOOM LENS SYSTEM - A zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, and a positive fifth lens group. Upon zooming from the short to long focal length extremities, the distance between the first and second lens groups increases, and the distance between the second and third lens groups decreases. The following conditions are satisfied: | 10-24-2013 |
20130301141 | TELEPHOTO ZOOM LENS SYSTEM AND PHOTOGRAPHING APPARATUS HAVING THE SAME - A telephoto zoom lens system includes a first lens group having a positive focal length, a second lens group having a negative focal length, a third lens group having a positive or negative focal length, a fourth lens group having a positive focal length, and a fifth lens group for performing hand shake compensation by allowing a portion of the fifth lens group to move perpendicularly to the optical axis. During zooming, the first and fifth lens groups are fixed and the second, third, and fourth lens groups move, and the third or fourth lens group is a focusing lens group. | 11-14-2013 |
20130308201 | OPTICAL INSPECTION SYSTEM WITH A VARIATION SYSTEM CONSISTING OF FIVE LENS GROUPS FOR IMAGING AN OBJECT INTO INFINITY - The invention relates to an optical inspecting system designed to image an object to be inspected with a variable imaging scale, comprising a variation system for imaging the object into infinity, a lens group downstream of the variation system for imaging the object from infinity into the image plane of the whole system, and a light source for generating light in order to illuminate the object, means for imaging the illuminating light into the exit pupil of the variation system being provided in the airspace between the fifth lens group and the subsequent lens group. Of the five lens groups of the variation system, the first, second, and fourth lens groups, when seen in the imaging direction, are arranged in a movable manner in the direction of the optical axis, whereas the third and fifth lens groups are not movable. | 11-21-2013 |
20130314800 | PROJECTION ZOOM LENS AND PROJECTION DISPLAY APPARATUS - A projection zoom lens having broad angle of view, high zoom ratio, and large back focus while aberrations are corrected satisfactorily, including a negative first lens group, a positive second lens group, a positive third lens group, a negative fourth lens group, a positive fifth lens group, and a positive sixth lens group from the magnification side and is telecentric on the reduction side. When zooming, the first and sixth lens groups are fixed while the second to fifth lens groups are moved and the fourth lens group is composed of one negative lens whose magnification side surface has a greater curvature in absolute value than that of the reduction side surface, and the zoom lens satisfies conditional expression (1): −12.011-28-2013 | |
20130335830 | ZOOM LENS AND OPTICAL APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a negative fourth lens unit, and a rear lens unit including, in order from object side to image side, a positive first lens subunit, a negative second lens subunit, and a positive third lens subunit. The relationship between the combined focal length of the first and second lens units at wide-angle end, the combined focal length of the third lens unit and the lens units on the image side of the third lens unit at wide-angle end, the focal length of the second lens subunit, and the focal length of the rear lens unit at telephoto end is appropriately set. | 12-19-2013 |
20140043692 | ZOOM LENS AND IMAGE-PICKUP APPARATUS - A zoom lens includes, in order from an object side to an image side, a first, a second, a third, a fourth and a fifth lens units respectively having positive, negative, positive, negative, and positive refractive powers. The first lens unit includes negative, positive, and positive lenses in order from the object side to the image side. The second lens unit includes negative, negative, and positive lenses in order from the object side to the image side. Each lens unit moves during zooming. The predetermined conditional expressions are satisfied. | 02-13-2014 |
20140078596 | ZOOM LENS AND PHOTOGRAPHING APPARATUS HAVING THE SAME - A zoom lens includes: a first lens group having a positive refractive power and including a plurality of lenses, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power and including one lens, and a fifth lens group having a positive refractive power and including one lens. The first through fifth lens groups are subsequently arranged from an object side. An interval between neighboring lens groups changes during zooming from a wide angle position to a telephoto position. The zoom lens satisfies the following inequality, 0.4≦n1−n2≦0.7, where “n1” denotes a refractive index of a first lens from the object side in the first lens group, and “n2” denotes a refractive index of the second lens from the object side in the first lens group. | 03-20-2014 |
20140078597 | ZOOM LENS AND PROJECTOR USING THE SAME - A zoom lens includes a negative lens unit arranged closest to an enlargement conjugate side among lens units having negative refractive power included in the zoom lens, at least one positive lens unit having positive refractive power arranged closer to the enlargement conjugate side than the negative lens unit, and a rear lens unit including at least one lens unit and arranged closer to a reduction conjugate side than the negative lens unit, wherein a distance between adjacent lens units is changed during zooming, a stop is arranged closer to the reduction conjugate side than the negative lens unit, the rear lens unit includes at least one positive lens, and the positive lens satisfies a predetermined condition. | 03-20-2014 |
20140085733 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification from the wide angle end to the telephoto end, a distance between the first lens group and the second lens group is always increased, a distance between the second lens group and the third lens group is always decreased, a distance between the third lens group and the fourth lens group is always decreased, and a distance between the fourth lens group and the fifth lens group is changed, while all of the lens groups are moved with respect to an image formation position. Formulas (Ca): −5.00≦1−(β | 03-27-2014 |
20140085734 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification, the distances between adjacent lens groups are changed, while all of the lens groups are moved with respect to an image formation position. When focusing, only the fifth lens group is shifted. The fifth lens group has at least one negative lens and at least one positive lens. | 03-27-2014 |
20140104697 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens substantially consists of, in order from the object side, a positive first lens group, a negative second lens group, a positive third lens group, a positive fourth lens group, and a negative fifth lens group. When varying magnification, the distances between adjacent lens groups are changed, while all of the lens groups are moved with respect to an image formation position. If β | 04-17-2014 |
20140118839 | ZOOM LENS AND IMAGE-PICKUP APPARATUS - A zoom lens includes, in order from an object side to an image side, a first, a second, a third, a fourth, a fifth, a sixth and a seventh lens units respectively having positive, negative, positive, negative, positive, negative and positive refractive powers. A distance between adjacent lens units change during zooming so that a distance between the fourth lens unit and the fifth lens unit at a telephoto end is shorter than the distance at a wide angle end and a distance between the fifth lens unit and the sixth lens unit at the telephoto end is longer than the distance at the wide angle end. And the fourth lens unit moves during focusing. | 05-01-2014 |
20140146397 | VARIABLE MAGNIFICATION OPTICAL SYSTEM AND IMAGING APPARATUS - A variable magnification optical system includes a relay lens group (a fifth lens group) substantially consisting of a relay front group and a relay rear group with a predetermined air space therebetween, and which is fixed during magnification change and has image formation action, and an extender lens group insertably and detachably arranged between the relay front group and the relay rear group, and which extends a focal length toward a telephoto side without changing an image formation position. The extender lens group substantially consists of a first lens group having positive refractive power and a second lens group having negative refractive power in this order from an object side. The second lens group is a cemented lens substantially consisting of a convex meniscus lens, a biconcave lens and a convex meniscus lens in this order from the object side. | 05-29-2014 |
20140153108 | VARIABLE MAGNIFICATION OPTICAL SYSTEM AND IMAGING APPARATUS - A variable-magnification optical-system substantially consists of a first-lens-group having positive-refractive-power, a second-lens-group having negative-refractive-power, a third-lens-group having negative-refractive-power, a fourth-lens-group having negative-refractive-power, an aperture-stop, and a fifth-lens-group having positive-refractive-power in this order from an object-side along an optical-axis. The second-lens-group, third-lens-group and fourth-lens-group move when magnification is changed from a wide-angle-end to a telephoto-end. The first-lens-group substantially consists of a 1f-th lens-group having negative-refractive-power, a 1m-th lens-group having positive-refractive-power and a 1r-th lens-group substantially consisting of a 1r1-th lens having positive-refractive-power with its strong convex-surface facing the object-side, a biconvex 1r2-th lens and a convex meniscus 1r3-th lens with its convex-surface facing the object-side, and the 1r-th lens-group having positive-refractive-power as a whole in this order from the object-side. The 1f-th lens-group substantially consists of a concave meniscus-lens with its convex-surface facing the object-side and a negative-lens in this order from the object-side. | 06-05-2014 |
20140185145 | ZOOM LENS, IMAGING DEVICE AND INFORMATION DEVICE - A zoom lens includes, in order from an object side in an optical axis a first lens group having a positive refractive power, a second lens group having a negative refractive power; a third lens group having a negative refractive power, a fourth lens group having a positive refractive power, a fifth lens group having a positive refractive power, and an aperture stop arranged between the third lens group and the fourth lens group, an interval between the first lens group and the second lens group being increased, an interval between the second lens group and the third lens group being varied, an interval between the third lens group and the fourth lens group being decreased, and an interval between the fourth lens group and the fifth lens group being decreased when changing a magnification from a wide-angle end to a telephoto end. | 07-03-2014 |
20140204469 | Zoom Lens - A zoom lens includes an external frame, a rotary shaft, an internal frame, a lens group and a spring. The internal frame is connected to the external frame via the rotary shaft, so that the internal frame is rotatable relative to the external frame. The lens group is fixed in the internal frame. The spring comprises a deformation part and two extension parts extended from the deformation part, wherein one extension part is propped against the internal frame and inclined at an acute angle relative to the rotary shaft, and the other extension part is propped against the external frame. | 07-24-2014 |
20140240847 | Zoom Lens - A zoom lens includes a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group and a sixth lens group, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens group is with positive refractive power. The second lens group is with negative refractive power. The third lens group is with positive refractive power. The fourth lens group is with negative refractive power. The fifth lens group is with positive refractive power. The zoom lens satisfies the following condition: |f | 08-28-2014 |
20140254027 | PROJECTION ZOOM LENS AND PROJECTION TYPE DISPLAY DEVICE - The projection zoom lens substantially consists of a first lens group having negative refractive power, a second lens groups through a fourth lens group all having positive refractive power, a fifth lens group having positive or negative refractive power, and a sixth lens group having positive refractive power, arranged in this order from the magnification side; wherein the reduction side is telecentric. Further, the first lens group and the sixth lens group are fixed and the second lens group through the fifth lens group move along the optical axis while changing magnification. The fourth lens group substantially consists of only one positive meniscus lens with a concave surface toward the reduction side. The projection zoom lens satisfies conditional expression (1) below: | 09-11-2014 |
20140268364 | ZOOM LENS AND IMAGE PICKUP DEVICE PROVIDED WITH THE SAME - A zoom lens includes: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a rear unit having two or more lens units, in the order from an object side to an image side, an interval between the adjacent lens units being changed in order to carry out at least one of zooming and focusing, wherein the rear unit includes a focus lens unit that has a negative refractive power and that moves during the focusing, and wherein, when the zoom lens focuses on a specific object distance, the focus lens unit moves integral with the other lens unit during zooming. | 09-18-2014 |
20140268365 | Zoom Lens and Image Pickup Apparatus Equipped with Same - A zoom lens consists of, in order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a fifth lens unit having a positive refractive power. The first lens unit and the second lens unit move during zooming from the wide angle end to the telephoto end. The zoom lens satisfies the following conditional expressions (1), (2), and (3): | 09-18-2014 |
20140362452 | ZOOMING OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOMING OPTICAL SYSTEM - A zooming optical system that is compact and has high zooming ratio and superb optical performance, optical system and a method for manufacturing the zooming optical system, are provided. The zooming optical system includes, in order from an object along the optical axis, a first lens group G | 12-11-2014 |
20140376102 | ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME - A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, a fifth lens unit having a positive refractive power, and an aperture stop disposed between the second lens unit and the third lens unit. At the time of zooming, the aperture stop moves and the fifth lens unit is fixed. At the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, a distance between the third lens unit and the fourth lens unit fluctuates, and a distance between the fourth lens unit and the fifth lens unit fluctuates. | 12-25-2014 |
20150015968 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens, including, in order from object side, a positive first unit, a negative second unit, a positive third unit, a negative fourth unit, and a positive fifth unit. The first unit includes, in order from object side, a negative first sub unit which does not move for focusing, a positive second sub unit which moves during focusing, and a positive third sub unit which does not move for focusing and includes a negative lens. 1.601-15-2015 | |
20150015969 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens includes: a first lens group having a positive refractive power which is fixed while changing magnification; two or more movable lens groups that move independently from each other while changing magnification; and a final lens group having a positive refractive power which is fixed while changing magnification, provided in this order from an object side. The zoom lens satisfying Conditional Formula (1) below: | 01-15-2015 |
20150029595 | Mechanical Zoom Imaging Apparatus - An imaging assembly for the viewing, imaging, and analysis of chemiluminescent or bioluminescent samples in gels or other substrates, in which an adjustable camera and lens module having a prime or fixed lens or a focusing lens is moved to change the field of view by shifting the focal plane of the camera and lens module. The imaging assembly can also include a mirror to bend or fold the optical path between the camera and lens module and the target area having a sample, in which the mirror can move in the same vertical direction as the camera and lens module. Further, the camera and lens module can be configured to more move in a diagonal direction relative to the location of the imaging target area. The imaging assembly can further have a duct system adaptable to adjust with the movement of the camera and lens module. | 01-29-2015 |
20150055226 | IMAGING APPARATUS - The imaging apparatus includes a focus lens, a front zoom lens disposed on a subject side of the focus lens, a rear zoom lens disposed on an image side of the focus lens, a focus drive unit configured to drive the focus lens, a zoom drive unit configured to drive the front and rear zoom lenses, a focus origin point detector provided in a movable range of the rear zoom lens, configured to detect a focus origin point of the focus lens, and a controller configured to control the focus drive unit and the zoom drive unit. When the controller loses track of a position of the focus lens, the controller drives the focus lens in accordance with a relative movement amount of the front and rear zoom lenses by the zoom drive unit to move the focus lens to the focus origin point. | 02-26-2015 |
20150092279 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - Provided is a zoom lens, comprising, in order from an object side to an image side: first to fifth lens units having positive, negative, positive, positive, and negative refractive powers, respectively. During zooming, the first, third, and fifth lens units are immovable, and the second and fourth lens units are moved. The fifth lens unit includes a partial unit (L5n) having a negative refractive power, and a partial unit (L5p) having a positive refractive power. An entire lens length (TL), a focal length (ft) of an entire system at a telephoto end, a focal length (f2) of the second lens unit, a focal length (f4) of the fourth lens unit, and a focal length (f5n) of the partial unit (L5n) are set appropriately. | 04-02-2015 |
20150092280 | ZOOM LENS AND IMAGING APPARATUS - The zoom lens substantially consists of a positive first lens group fixed while changing magnification, a negative second lens group which moves from the object side to the image side while changing magnification, a positive third lens group which moves while changing magnification, and a positive fourth lens group which moves from the image side to the object side while changing magnification, and a positive fifth lens group fixed while changing magnification in this order from the object side. A floating system in which the third lens group and the fourth lens group move relative to each other while changing magnification is adopted. The image formation magnification rates of the combined lens group formed by the third lens group and the fourth lens group together and the second lens group simultaneously pass − | 04-02-2015 |
20150309290 | ZOOM LENS AND IMAGING APPARATUS - A five-group zoom lens including, in order from the object side, positive, negative, negative, positive, and positive groups. The first group includes a negative meniscus lens with the concave surface toward the image side, a positive lens and a positive lens. The second group includes a negative lens with the image-side surface having an absolute value of curvature radius smaller than that of the object side surface, a biconcave lens, and a biconvex lens. The third group includes a negative lens with the object side surface having an absolute value of curvature radius smaller than that of the image-side surface, and is moved during focusing on a closer object. The fifth group includes a positive fifth-A group including a biconvex lens, and a negative fifth-B group including a biconcave lens and a biconvex lens, wherein condition expression (1) is satisfied: | 10-29-2015 |
20150316755 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens includes, in order from an object side to an image side: a first lens unit having a positive refractive power that does not move for zooming; a second lens unit having a negative refractive power that moves during zooming; a third lens unit having a positive refractive power that moves during zooming; and at least one lens unit having a positive refractive power, and focal lengths of the zoom lens at a wide angle end and a telephoto end, a maximum value of a half angle of field at the wide angle end, and products of lateral magnifications of lens units arranged on the image side of the third lens unit in a state in which focus is at infinity at the telephoto end and the wide angle end are appropriately set. | 11-05-2015 |
20150323770 | VARIABLE MAGNIFICATION OPTICAL SYSTEM, OPTICAL DEVICE, AND PRODUCTION METHOD FOR VARIABLE MAGNIFICATION OPTICAL SYSTEM - Composing, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power and a fifth lens group; upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group, a distance between the second lens group and the third lens group, a distance between the third lens group and the fourth lens group and a distance between the fourth lens group and the fifth lens group being varied, and predetermined conditional expression being satisfied, thereby providing a small-size variable magnification optical system having a high zoom ratio and a high optical performance, an optical apparatus, and a method for manufacturing the variable magnification optical system. | 11-12-2015 |
20150346466 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, a fifth lens unit having a positive refractive power, and an aperture stop disposed between the second lens unit and the third lens unit. At the time of zooming, the aperture stop moves and the fifth lens unit is fixed. At the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, a distance between the third lens unit and the fourth lens unit fluctuates, and a distance between the fourth lens unit and the fifth lens unit fluctuates. | 12-03-2015 |
20150370041 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens includes, in order from the object side, a positive first group, a negative second group, a stop, a positive third group, a negative fourth group, and a positive fifth group. During magnification change from the wide-angle end to the telephoto end, the first to fourth groups are moved to always increase the distance between the first and second groups, always decrease the distance between the second and third groups, and change the distance between the third and fourth groups and the distance between the fourth and fifth groups. The third group includes, in order from the object side, at least a positive lens, a positive lens, a negative lens, and a positive lens, and satisfies condition expression (1) below: | 12-24-2015 |
20150370050 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens includes in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a negative refractive power, and includes an aperture stop which is disposed between the second lens unit and the fourth lens unit, and the first lens unit includes a negative lens and a plurality of positive lenses, and at the time of zooming from a wide angle end to a telephoto end, a distance between the first lens unit and the second lens unit widens, a distance between the second lens unit and the third lens unit narrows, and a distance between the third lens unit and the fourth lens unit changes, and the zoom lens satisfies predetermined conditional expressions. | 12-24-2015 |
20150370052 | ZOOM LENS SYSTEM - Provided is a zoom lens system, sequentially arranged in an order from an object side to an image side, including: a first lens group having a positive refractive power; a second lens group having a negative refractive power; an aperture stop; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; and a fifth lens group having a positive refractive power, wherein each of the second lens group, the third lens group, and the fourth lens group has an anomalous dispersion ΔPct of −0.1 or less. | 12-24-2015 |
20160054549 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens including, in order from object side, a positive first lens unit not moving for zooming, a negative second lens unit moving during zooming, at least one other lens unit moving during zooming as at least a third lens unit, and a rearmost lens unit closest to an image side not moving for zooming, and also including an aperture stop at the image side of the second lens unit, average values of Abbe numbers and relative partial dispersions of each of positive lenses and negative lenses forming the second lens unit, anomalous dispersion of a lens having a smallest Abbe number of negative lenses forming the rearmost lens unit, an axial distance between surface vertex positions of lenses closest to the object and image sides of the zoom lens, and a distance between the aperture stop and the negative lens at a wide angle end are appropriately set. | 02-25-2016 |
20160091692 | ZOOM LENS - There is provided a zoom lens, consisting of sequentially from an object side: a first lens group having a positive refractive power and a focusing function; a second lens group having a negative refractive power and having a variator function of performing zooming; a third lens group having a positive refractive power and a diaphragm; a fourth lens group having a positive refractive power, and having a compensator function of correcting a position of an imaging plane at the time of zooming; and a fifth lens group having a positive or negative refractive power, wherein the second lens group is moved to the imaging plane side from the object side along an optical axis, and the fourth lens group is moved along the optical axis in a state of fixing the first lens group, the third lens group, and the fifth lens group at the time of zooming from a wide angle end to a telephoto end, and only the first lens group is moved along the optical axis at the time of focusing. | 03-31-2016 |
20160091697 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens consists of, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, a fifth lens group having a positive refractive power, and a sixth lens group having a positive refractive power, wherein magnification change is effected by changing all distances between adjacent lens groups. The first lens group is fixed relative to the image plane during magnification change, and the second lens group is moved from the object side toward the image side during magnification change from the wide-angle end to the telephoto end. The sixth lens group includes a positive lens and a negative lens. | 03-31-2016 |
20160091698 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens consists of, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power, a fifth lens group having a positive refractive power, and a sixth lens group having a positive refractive power, wherein magnification change is effected by changing all distances between adjacent lens groups. The second lens group is moved from the object side toward the image side during magnification change from the wide-angle end to the telephoto end. The position of the third lens group at the telephoto end is nearer to the image side than the position of the third lens group at the wide-angle end. | 03-31-2016 |
20160103303 | ZOOM LENS SYSTEM - A zoom lens system includes a positive first lens group, a negative second lens group, in that order from the object side, and a positive n | 04-14-2016 |
20160139374 | ELECTRONIC IMAGE PICKUP SYSTEM - The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-banding zoom optical system comprising, in order from its object side, a 1-1st lens group G | 05-19-2016 |
20160147047 | ZOOM LENS SYSTEM - A zoom lens system includes a positive first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, and a positive fifth lens group having a plurality of lens elements. During zooming from the short to long focal length extremities, at least the first, third and fifth lens groups move in an optical axis direction. A surface closest to the image side of the zoom lens system is a concave surface facing the image side. The following condition (1) is satisfied: | 05-26-2016 |
20160154217 | ZOOM LENS AND IMAGING APPARATUS HAVING THE SAME | 06-02-2016 |
20160154221 | ZOOM LENS AND IMAGING APPARATUS | 06-02-2016 |
20160195703 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME | 07-07-2016 |