Class / Patent application number | Description | Number of patent applications / Date published |
359690000 | + - + Arrangement | 26 |
20080285150 | ZOOM OPTICAL SYSTEM, IMAGE PICKUP DEVICE, AND DIGITAL APPARATUS - A zoom optical system at least includes in the order from an object side: a first lens group having a positive optical power; a second lens group having a negative optical power; and a third lens group having a positive optical power. In zooming from a wide angle end to a telephoto end, a distance between the first lens group and the second lens group is increased, and a distance between the second lens group and the third lens group is decreased. The first lens group includes at least one negative lens element, and the second lens group includes a negative lens element closest to the object side, with a lens surface of the negative lens element being concave toward an image side. The zoom optical system satisfies the following conditional expressions (1) and (2): | 11-20-2008 |
20090002845 | Zoom lens - The invention relates to a zoom lens which, albeit being of simplified construction, makes sure brightness and holds back fluctuations of astigmatism, and facilitates making sure being fast and the angle of view and the zoom ratio at the wide-angle end. The zoom lens comprises a first group G | 01-01-2009 |
20090052052 | Zoom lens and image-capture device - A zoom lens includes a plurality of lens groups having at least first, second and third lens groups arranged in order from an object side. The first lens group has a positive refractive power which is firmly secured when the magnification is changed, the second lens group has a negative refractive power which is shifted to the image side when the magnification is changed from the wide angle end to the telescopic end, and the third lens group has a positive refractive power which is firmly secured when the magnification is changed. The first lens group is configured by arranging, in order from the object side, a single lens having a negative refractive power, a prism having a reflection surface to create a 90° bend in a light path, and at least one single lens having a positive refractive power. | 02-26-2009 |
20090109547 | ZOOM LENS SYSTEM AND IMAGING OPTICAL DEVICE EMPLOYING THE SAME - A zoom lens system according to the present invention comprises a plurality of lens units, in order from an object side to an image side, including at least: a first lens unit having positive optical power; a second lens unit having negative optical power; and a third lens unit having positive optical power, wherein magnification change is performed by changing an interval between the individual lens units, wherein the second lens unit, in order from the object side to the image side, comprises: a lens element A having negative optical power; a lens element B that has an aspheric surface and has negative optical power; and a lens element C having positive optical power, and wherein the second lens unit satisfies the following conditions (1): 1.8504-30-2009 | |
20090109548 | ZOOM LENS AND IMAGE-PICKUP APPARATUS - A zoom lens achieves a high zoom ratio and high optical performance in an entire zoom range. 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, and a rear unit which includes at least one lens unit. At least the second lens unit is moved during zooming such that a distance between the first and second lens units is larger at a telephoto end than at a wide-angle end. The first lens unit includes at least a first lens element made of a material which satisfies Nd | 04-30-2009 |
20090147376 | ZOOM LENS SYSTEM, OPTICAL DEVICE WITH ZOOM LENS SYSTEM, AND METHOD OF MANUFACTURING ZOOM LENS SYSTEM - A zoom lens system comprises, in order from an object, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. The first lens group has a first-a partial lens group and a first-b partial lens group arranged on an image side of the first-a partial lens group with an air space and is constructed such that the first-b partial lens group moves along an optical axis direction upon focusing from infinity to a close-range object. The third lens group is constituted by a third-a partial lens group having a positive refractive power and a third-b partial lens group having a negative refractive power arranged on the image side of the third-a partial lens group with an air space. | 06-11-2009 |
20090244720 | 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. | 10-01-2009 |
20100220400 | ZOOM LENS, OPTICAL APPARATUS EQUIPPED THEREWITH AND METHOD FOR MANUFACTURING THE ZOOM LENS - A zoom lens ZL installed in a single-lens reflex digital camera | 09-02-2010 |
20100302651 | ZOOM LENS - A zoom lens including, in a sequence from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a succeeding lens group having an overall positive refractive power, and having a high zoom magnification and a compact size. | 12-02-2010 |
20110096409 | ZOOM LENS SYSTEM, OPTICAL DEVICE WITH ZOOM LENS SYSTEM, AND METHOD OF MANUFACTURING ZOOM LENS SYSTEM - A zoom lens system comprises, in order from an object, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power. The first lens group has a first-a partial lens group and a first-b partial lens group arranged on an image side of the first-a partial lens group with an air space and is constructed such that the first-b partial lens group moves along an optical axis direction upon focusing from infinity to a close-range object. The third lens group is constituted by a third-a partial lens group having a positive refractive power and a third-b partial lens group having a negative refractive power arranged on the image side of the third-a partial lens group with an air space. | 04-28-2011 |
20110273780 | Zoom lens and imaging apparatus - A zoom lens includes first, second, and third lens groups having positive, negative, and positive refractive powers, respectively, which are arranged in order from the object side to the image side. When zooming from wide-angle to telephoto, the first lens group moves to the object side, and spacings between the lens groups change. The third lens group has at least two lenses including a positive lens arranged closest to the object side. Blur correction on the image plane is performed by moving the positive lens of the third lens group perpendicularly to the optical axis. The zoom lens satisfies the following conditional expression (1): | 11-10-2011 |
20110279909 | Image forming optical system and electronic image pickup apparatus equipped with same - An image forming optical system 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, and an image-side lens group having a positive refractive power. A distance between the first lens group and the second lens group changes at the time of zooming. A refractive optical element A having a positive refractive power is positioned in the first lens group. The image forming optical system satisfies the following conditional expression (1-1), conditional expression (1-2), and conditional expression (2). | 11-17-2011 |
20110286109 | 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 having 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, 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 partial dispersion ratio θgF of the refractive optical element A satisfies certain conditions. | 11-24-2011 |
20120236420 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens includes, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a third lens group that has a positive refractive power, wherein the second lens group is constituted by three lenses of a first negative lens, a second negative lens, and a positive lens which are arranged in order from the object side to the image side, wherein an aspheric surface is formed on at least an object side of the positive lens in a shape of which a curvature gradually decreases as an outer periphery of the lens gets closer from an optical axis, and wherein the following Conditional Expressions (1) and (2) are satisfied: | 09-20-2012 |
20120275035 | ZOOM LENS AND IMAGE-PICKUP APPARATUS HAVING THE SAME - A zoom lens includes a first lens unit having a positive refractive power and arranged closest to an object side. 0.5011-01-2012 | |
20120300313 | ZOOM LENS, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM LENS - Including, in order from an object side: a first lens group having positive power; a second lens group having negative power; and a third lens group having positive power, each distance between respective lens groups varying upon zooming; the third lens group including, in order from the object side, a first sub-group having positive power, a second sub-group having positive power, a third sub-group having negative power, and a fourth sub-group having positive power, the first sub-group being movable along an optical axis for focusing, the third sub-group being movable in a direction including a component perpendicular to the optical axis, thereby correcting an image blur, and a given condition being satisfied, thereby providing a compact zoom lens having high optical performance with disposing a focusing lens and a vibration reduction lens in the same lens group, an optical apparatus equipped therewith, and a method for manufacturing the zoom lens. | 11-29-2012 |
20130003191 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens comprising, in order from the object side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a third lens group that has a positive refractive power. Zooming is performed by changing spaces between the first to third lens groups during zooming from a wide-angle end to a telephoto end. The third lens group includes, in order from the object side, a positive lens group, having a positive refractive power, and a negative lens group, disposed to be close to the image side thereof and having a negative refractive power, with an air gap, which is widest in the third lens group, interposed therebetween. The following Conditional Expression (1) is satisfied. | 01-03-2013 |
20130100539 | 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, and a third lens group having a positive refractive power. The first lens group includes a negative lens and a positive lens. The second lens group includes sequentially from the object side, a negative lens, a negative lens, and a positive lens. The third lens group includes sequentially from the object side a front group having a positive refractive power, a middle group having a negative refractive power, and a rear group having a positive refractive power. The front group is formed by a positive aspheric lens. The middle group is includes a cemented lens formed by a positive lens and a negative lens. | 04-25-2013 |
20130208364 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING ZOOM LENS - A zoom lens including a first lens unit having a positive refractive power, a second lens unit having a negative reflective power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units in this order from an object side to an image side, wherein distances between the respective lens units vary during the zooming operation, wherein the first lens unit consists of three lenses including one negative lens, and a partial dispersion ratio of a material for the negative lens of the first lens unit, an Abbe number of the same, a focal length of the entire system at a wide angle end and a focal length of the first lens unit are set individually and adequately. | 08-15-2013 |
20130258498 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side,
| 10-03-2013 |
20140334013 | ZOOM LENS SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING ZOOM LENS SYSTEM - In a zoom lens system, an optical apparatus, and a manufacturing method, there are provided, in order from an object side: a first lens group having positive power, a second lens group having negative power, a third lens group having positive power, a fourth lens group having negative power, a fifth group having positive power, and an aperture stop disposed to an image side of the second lens group. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens and second lens groups increases, a distance between the second and third lens groups decreases, a distance between the third and fourth lens groups varies, and a distance between the fourth and fifth lens groups varies. With given conditions being satisfied, high optical performance with suppressing variation in aberrations are achieved. | 11-13-2014 |
20150085376 | Endoscope Optical System - An endoscope optical system has a first lens group having positive refractive power, an aperture diaphragm, a second lens group having negative refractive power and a third lens group having positive refractive group, the second lens group moving along an optical axis to perform focusing, the first lens group having a first lens having negative refractive power and a second lens having positive refractive power, and the optical system satisfying the following conditional equation: | 03-26-2015 |
20160139379 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side,
| 05-19-2016 |
20160139380 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side,
| 05-19-2016 |
20160139381 | Zoom Lens and Image Pickup Apparatus Using the Same - A zoom lens comprises in order from an object side,
| 05-19-2016 |
20160154230 | Endoscope Objective Optical System | 06-02-2016 |