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Subclass of:

359 - Optical: systems and elements

359642000 - LENS

359676000 - With variable magnification (e.g., zoom type)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
359682000 Having seven or less components 72
Entries
DocumentTitleDate
20110194191ZOOM LENS SYSTEM, IMAGING APPARATUS, AND METHOD FOR ZOOMING THE ZOOM LENS SYSTEM - Providing a zoom lens system having excellent optical performance with a high zoom ratio, an imaging apparatus, and a method for zooming the zoom lens system. The system including, in order from an object, a first group G08-11-2011
20110194190ZOOM LENS SYSTEM AND ELECTRONIC IMAGING APPARATUS THAT USES THE SAME - A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in this order from the object.08-11-2011
20130027785ZOOM LENS AND PHOTOGRAPHING DEVICE HAVING THE SAME - A zoom lens and a photographing device including the zoom lens, the zoom lens including a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, which are sequentially arranged in the direction from an object side to an image side. During zooming from a wide angle position to a telephoto position, an interval between the first lens group and the second lens group decreases, and an interval between the second lens group and the third lens group increases. The first lens group comprises a first lens, a second lens being a negative lens formed of plastic, and a third lens being a positive lens formed of plastic. Therefore, the zoom lens is compact and low-priced and has a high magnification.01-31-2013
20090097130Zoom lens and electronic imaging device having the same - A zoom lens includes a most object-side lens unit remaining fixed on the optical axis when the magnification of the zoom lens is changed and a focusing operation is performed; a most image-side lens unit remaining fixed when the focusing operation is performed; and a plurality of moving lens units lying between the most object-side lens unit and the most image-side lens unit, moved along the optical axis when the magnification is changed. The most object-side lens unit includes, in order from the object side, a negative lens component, a reflective optical component having a reflecting surface for bending the optical path, and a positive lens component. The most image-side lens unit has at least one aspherical surface. An electronic imaging device includes an electronic image sensor located on the image side of the zoom lens.04-16-2009
20130057964ZOOM LENS - An embodiment of this invention provides a zoom lens that primarily comprises, in order from an object side to an image-forming side, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. The second lens group comprises several lenses, in which the focal length of the first lens from the object side is efl3, the focal length of the second lens from the object side is efl4, and efl3 and efl4 satisfy: 003-07-2013
20110279906VARIABLE MAGNIFICATION OPTICAL SYSTEM AND IMAGING APPARATUS - A variable magnification optical system includes a negative first lens group, a stop and a positive second lens group, arranged from the object side in the order mentioned above. The magnification of the variable magnification optical system is changed by changing a distance between the first lens group and the second lens group in the direction of an optical axis. The first lens group includes a negative plastic lens, and the second lens group includes a positive plastic lens. Further, the following formulas (1) and (2) are satisfied:11-17-2011
20110141574ZOOM LENS, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM LENS - A zoom lens includes, in order from an object side along an optical axis: a first lens group G1 having negative refractive power; a second lens group G2 having positive refractive power; and a third lens group G3 having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group G1 and the second lens group G2 varies, and a distance between the second lens group G2 and the third lens group G3 varies, and a given conditional expression is satisfied.06-16-2011
20090201590OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING OPTICAL SYSTEM - An optical system used for an image pickup apparatus including an image pickup element is provided. The optical system includes a negative lens disposed furthest away on the enlargement conjugation side and satisfies the following condition: 80 degrees<2ω, where 2ω (degrees) denotes an angle of view of the optical system. In addition, the following parameters of the optical system are optimally determined: a lens open angle θ of a surface of the negative lens on the reduction conjugation side, an index of refraction Ndn and an Abbe number vdn of a material of the negative lens for a d-line, and a relative partial dispersion θgFn of the material of the negative lens for a g-line and an F-line.08-13-2009
20120293871ZOOM LENS - A zoom lens includes a first lens group, a second lens group, a third lens group, and a fourth lens group. The first lens group includes a first lens that has positive refractive power, a second lens that has negative refractive power, and a prism. The second lens group includes a third lens that has positive refractive power and a fourth lens that has negative refractive power. The third lens group includes a stop, a fifth lens that has positive refractive power, and a sixth lens that has negative refractive power. The fourth lens group includes a seventh lens that has positive refractive power. Upon changing magnification from a wide-angle end to a telephoto end, the first and fourth lens groups are fixed, the second lens group first moves toward an image plane side and then moves toward an object side, and the third lens group linearly moves toward the object side.11-22-2012
20110267704ZOOM LENS FOR PROJECTION AND PROJECTION-TYPE DISPLAY APPARATUS - A zoom lens for projection includes a negative first lens group, a positive second lens group, a positive third lens group, and a positive fourth lens group, which are arranged from the magnification side of the zoom lens in the order mentioned above. The first lens group and the fourth lens group are fixed during zooming, but the second lens group and the third lens group move on optical axis Z of the zoom lens toward the magnification side, based on an operation for operating the zoom lens from wide end to tele end, in such a manner that a distance between the second lens group and the third lens group changes. Further, the following formula (1) is satisfied:11-03-2011
20080239507IMAGE PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS - An image projection optical system introduces light from an image-forming element by a zoom lens via an optical element. The optical element satisfies Σ(Di×Ndi)/fw>4.0. The zoom lens includes, in order from a magnification side, first and second lens units, and lens units disposed closer to a reduction side than the second lens unit. The first lens unit is a negative lens unit. The lens units disposed closer to the reduction side than the second lens unit satisfy |dn/dt|<1.0×1010-02-2008
20090168192OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME - An optical system includes a first negative lens element disposed nearest a front side and a first positive lens element whose front surface resides within a distance 0.4 L from the surface nearest the front side toward a rear side of the optical system having a total lens length L. By appropriately determining the materials for the two lens elements, the optical system realizes a wide angle of view while correcting lateral chromatic aberration well.07-02-2009
20110141575ZOOM LENS SYSTEM, OPTICAL APPARATUS EQUIPPED WITH ZOOM LENS SYSTEM AND METHOD FOR ZOOMING ZOOM LENS SYSTEM - A zoom lens system ZL mounted in an electronic still camera 06-16-2011
20110134537ZOOM LENS SYSTEM, OPTICAL APPARATUS EQUIPPED THEREWITH, AND METHOD FOR ZOOMING ZOOM LENS SYSTEM - A zoom lens system ZL installed in an electronic still camera 06-09-2011
20100165476OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING OPTICAL SYSTEM - Provided are an imaging optical system in which chromatic aberrations are excellently corrected across the entire screen to realize high optical performance, and an optical apparatus including the imaging optical system. In an imaging optical system of which a back focus is longer than a focal length, a lens unit located in a reduction-conjugate side of an aperture stop includes at least one positive lens. A partial dispersion ratio and an Abbe number of the positive lens are set such that a refractive index, a position, and a power satisfy a suitable relationship.07-01-2010
20110149411ZOOM LENS - A zoom lens having less distortion and exhibiting good imaging performance is provided. A zoom lens includes a first lens unit provided at the extremity of an enlargement conjugate side and having a negative refractive power, and a final lens unit provided at the extremity of a reduction conjugate side and having a positive refractive power. The final lens unit includes a cemented lens at the extremity of the reduction conjugate side. The cemented lens has a positive refractive power. The zoom lens satisfies specific conditional expressions.06-23-2011
20120307372ZOOM LENS, AND IMAGING APPARATUS INCORPORATING THE SAME - The zoom lens comprises, from an object side, a first lens group, a second lens group that includes an aperture stop moving integrally therewith, a third lens group, and a fourth lens group having, respectively, negative, positive, negative, and positive refracting power, and during zooming from a wide-angle end to a telephoto end, a spacing between the first and second lens groups becomes narrow, between the second and third lens groups changes, and between the third and fourth lens groups grows wide, and the first lens group includes a first lens having negative refracting power, a second lens having a reflective surface for bending a light ray coming out of an object and a third lens having positive refracting power, and in said second lens group, a most image-plane-side surface of a lens having negative refracting power is configured in a concave shape on an image plane side.12-06-2012
20110304921ZOOM LENS FOR PROJECTION AND PROJECTION-TYPE DISPLAY APPARATUS - A zoom lens for projection includes a negative magnification-side lens group fixed while magnification is changed, a plurality of lens groups that move while magnification is changed, and a positive reduction-side lens group fixed while magnification is changed which are arranged in this order from the magnification side. The magnification-side lens group is composed of a negative front-group and a positive rear-group, arranged in this order from the magnification side. The rear-group is composed of a positive lens, a negative lens and a positive lens, arranged in this order from the magnification side, and focusing is performed by moving the rear-group. Further, the following formulas (1) and (2) are satisfied:12-15-2011
20120044575RETROFOCUS WIDE-ANGLE LENS SYSTEM AND OPTICAL INSTRUMENT PROVIDED WITH THE SAME - A retrofocus wide-angle lens system is provided, wherein the entire the wide-angle lens system is divided at a position that satisfies the following condition (1) between a theoretical front lens group having a negative refractive power, and a theoretical rear lens group having a positive refractive power including the diaphragm, at a minimum focal length, and wherein a flat parallel plate is disposed at the position that satisfies the following condition (1):02-23-2012
20120057246COMPACT ZOOM LENS - A zoom lens including, in a sequence from an object side to an image plane side: a first lens group having a negative refractive power; a second lens group having a positive refractive power; a third lens group having a negative refractive power; and a fourth lens group having a positive refractive power. During zooming from a wide angle position to a telephoto position, an interval between the first lens group and the second lens group decreases, an interval between the second lens group and the third lens group increases, and an interval between the third lens group and the fourth lens group decreases. When the location of an object changes from ∞ to a close location, the first lens group is moved toward the object to perform focusing.03-08-2012
20120026601ZOOM 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 negative optical power and at least one subsequent lens unit, wherein a second lens unit is located closest to the object side in the subsequent lens units, an interval between the first lens unit and a lens unit which is one of the at least one subsequent lens unit varies in zooming, the condition: L02-02-2012
20120063001ZOOM LENS SYSTEM - A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in that order from the object side. Upon zooming from the short to long focal length extremities, the first through third lens groups move along an optical axis direction so that the distance between the first and second lens groups decreases, and the distance between the second and third lens groups increases. The first lens group includes a negative glass lens element and at least two plastic lens elements, in that order from the object side, and wherein the following condition (1) is satisfied: 03-15-2012
20120229912ZOOM LENS SYSTEM - A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in that order from the object side, wherein upon zooming from the short focal length extremity to the long focal length extremity, the distance between the first lens group and the second lens group decreases, and the distance between the second lens group and the third lens group increases. The second lens group includes a positive first sub-lens group and a negative second sub-lens group, in that order from the object side. The second sub-lens group is a negative single lens element serving as an image-stabilizer lens group which moves in directions orthogonal to the optical axis to change the imaging position to correct image shake.09-13-2012
20120275032ZOOM LENS SYSTEM, IMAGING APPARATUS, AND METHOD FOR ZOOMING THE ZOOM LENS SYSTEM - Providing a zoom lens system having excellent optical performance with a high zoom ratio, an imaging apparatus, and a method for zooming the zoom lens system. The system including, in order from an object, a first group G11-01-2012
20120243107ZOOM LENS SYSTEM - A zoom lens system includes a negative first lens group, a positive second lens group, and a positive third lens group, in that order from the object side, wherein upon zooming from the short to long focal length extremities, the distance between the first lens group and the second lens group decreases, and the distance between the second lens group and the third lens group increases. The second lens group includes a positive first sub-lens group and a negative second sub-lens group, in that order from the object side. In at least part of the zooming range of the zoom lens system, the second sub-lens group and the third lens group each serves as a focusing lens group that is moved along the optical axis during a focusing operation.09-27-2012
20130094095PROJECTION ZOOM LENS - When at least two resin lenses having oppositely signed power factors are disposed in positions that are not relatively far away from each other in a lens group disposed on a high magnification side with respect to an aperture stop, the difference in temperature between the two resin lenses can be reduced, whereby the amount of change in the focal point of an overall projection zoom lens can be reduced. The lens groups on the high magnification side with respect to the aperture stop, which are close to the atmosphere, experience a relatively small increase in temperature when in use. The focus shift due to variation in temperature can therefore be reliably reduced by disposing the resin lenses, which are readily affected by an increase in temperature, on the high magnification side with respect to the aperture stop.04-18-2013
20130094096PROJECTION ZOOM LENS - A projection zoom lens is formed of the following lens groups sequentially arranged from the high magnification side: a first lens group fixed at the time of zooming and having negative power; a second lens group moved along the optical axis at the time of zooming and having negative power; a third lens group moved at the time of zooming and having positive power; a fourth lens group moved at the time of zooming; and a fifth lens group fixed at the time of zooming and having positive power. When the total lens system operating at the wide angle end has a focal length Fw, and the first lens group has a focal length F04-18-2013
20110211263IMAGING LENS, OPTICAL APPARATUS INCLUDING IMAGING LENS AND METHOD FOR MANUFACTURING IMAGING LENS - An imaging lens SL mounted in a digital single lens reflex camera 09-01-2011
20120019926ZOOM LENS SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM LENS SYSTEM - A zoom lens system comprising, in order from an object side: a first lens group G01-26-2012

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