Class / Patent application number | Description | Number of patent applications / Date published |
359784000 | Three components | 64 |
20080212207 | IMAGING LENS - An imaging lens is provided and includes: in order from an object side of the imaging lens, an aperture diaphragm; a first lens having a positive refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on the object side; and a third lens having a meniscus shape having a convex surface on the object side in the vicinity of an optical axis thereof, each of the first lens, the second lens and the third lens having at least one aspherical surface, and the imaging lens satisfying the following conditional expressions. | 09-04-2008 |
20080266679 | Imaging lens - An imaging lens has a compact shape and sufficiently compensates for various aberrations. | 10-30-2008 |
20090002850 | COLOR IMAGE READOUT LENS AND COLOR IMAGE READOUT APPARATUS - A color image readout lens comprises, in order from an object side: a first group comprising a positive lens convex toward the object side and a biconcave negative lens; a stop; a second group comprising one diffractive optical element that has at least one flat surface and has a diffractive structure formed on the flat surface; and a third group comprising a biconvex positive lens and a negative lens concave toward the object side. | 01-01-2009 |
20090046380 | Thin Type Optical Lens System for Taking Image - An optical lens system for taking image comprises three lens elements with refractive power, from the object side to the image side: a first lens element with positive refractive power, a second lens element with negative refractive power having at least one aspheric surface, a third lens element with negative refractive power having at least one aspheric surface, and an aperture stop located between the first lens element and the second lens element. By such arrangements, it can effectively reduce the volume and the sensitivity of the lens system. | 02-19-2009 |
20090052062 | SMALL-DIAMETER OBJECTIVE OPTICAL SYSTEM - Reducing the outer diameter and effectively correcting various aberrations realizes a small-diameter objective optical system suitable for in vivo observation with a high numerical aperture. The invention provides a small-diameter objective optical system comprising, in order from an object plane a first lens group with positive refractive power, including at least one plano-convex lens whose convex surface faces an image plane; a second lens group with positive refractive power, including at least one concave lens; and a third lens group including a cemented lens of which a cemented surface has negative refractive power. The focal length of the third lens group is larger than the focal length of the first lens group. | 02-26-2009 |
20090185293 | WIDE-ANGLE LENS, OPTICAL APPARATUS, AND METHOD FOR FOCUSING - Providing a wide-angle lens having high optical performance, an optical apparatus using thereof, and a method for focusing the wide-angle lens. The lens including, in order from an object, a first lens group G | 07-23-2009 |
20090213475 | Optical Lens System for Taking Image - An optical lens system for taking image consisting of three lens elements with refractive power, in order from the object side to the image side: a meniscus first lens element with positive refractive power having a convex object-side surface; an aperture stop; a meniscus plastic second lens element with negative refractive power having a convex image-side surface, and the object-side surface and the image-side surface of the second lens element being both aspheric, the Abbe number of the second lens element being V | 08-27-2009 |
20090231734 | Imaging optical system for cameras - An imaging optical system for cameras comprising a stop, a first lens, a second lens, and a third lens in order from object side to image side. The first lens is convex at the object side, and has positive refractive power and both surfaces of which are aspherical. The second lens is convex at the image side and has negative refractive power. The third lens has a concave surface at its central portion facing the image side and a convex surface at its peripheral portions facing the image side. The imaging optical system satisfies the conditions of the following Inequalities: | 09-17-2009 |
20090244723 | Wide-Angle Lens - This invention is to enable a viewing angle of 110° or more with low chromatic aberration of magnification and distortion, while using a low number of lenses, such as 5 lenses. There is provided a first lens group and a second lens group arranged in order from a light incident side. The first lens group comprises a single negative lens, and a cemented lens that is a single positive lens and a single negative lens cemented together, and has negative power. The second lens group comprises two positive lenses and has positive power. The first lens group and the second lens group respectively include a single aspheric lens. Further, this wide-angle imaging lens satisfies the following conditional expression (1). | 10-01-2009 |
20100103537 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens includes, in order from an object side, a first lens having a negative power and including a concave image-side surface, a second lens having a positive power, a stop, a third negative lens, which is a biconcave lens, a fourth lens having a positive power, and a fifth lens having a positive power and including a convex image-side surface. The imaging lens satisfies the following conditional expressions: | 04-29-2010 |
20100202065 | PHOTOGRAPHING OPTICAL LENS ASSEMBLY - This invention provides a photographing optical lens assembly including, in order from an object side to an image side: a first lens element with positive refractive power; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; and a third lens element with negative refractive power having a concave object-side surface, a concave image-side surface and at least one inflection point formed on the third lens element, the object-side and image-side surfaces thereof being aspheric. The first lens element may be a bi-convex lens element or a convex-concave meniscus lens element. When the first lens element is a bi-convex lens element, the refractive power thereof may be significantly enhanced to shorten the total track length of the optical system. When the first lens element is a meniscus lens element, the astigmatism of the optical system may be better corrected. Such an arrangement of optical elements can effectively correct the aberrations of the optical system, improving image quality and enabling the optical lens assembly to maintain a compact form. | 08-12-2010 |
20100208367 | PHOTOGRAPHIC LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A photographic lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a stop, and a third lens unit having a positive refractive power. In the photographic lens, the third lens unit moves towards the object side while the second lens unit moves towards the image side during focusing from an infinitely distant object to a closest distance object. In addition, in the photographic lens, an image forming magnification of the second lens unit during focusing on a closest distance object is appropriately set. | 08-19-2010 |
20100232040 | METHOD OF MANUFACTURING A PHOTOGRAPHIC LENS HAVING MULTIPLE LENS GROUPS TO CORRECT A FOCUS DEVIATION, PHOTOGRAPHIC LENS MANUFACTURED USING THE METHOD, AND PHOTOGRAPHIC APPARATUS INCLUDING THE PHOTOGRAPHIC LENS - A photographic lens of a photographic apparatus which includes a plurality of lens groups may be manufactured using a method which includes correcting a focus deviation from a designed value generated in one lens group by adjusting a distance between lenses of another lens group. The distance between lenses may be adjusted using a washer. The lenses between which the distance is adjusted may include a positive lens and a negative lens, and the lens group having the lenses between which the distance is adjusted may have a negative refractive power. | 09-16-2010 |
20110128637 | IMAGING LENS SYSTEM AND IMAGING APPARATUS - An imaging lens system includes three lens groups having four lenses including a first lens, a second lens, a third lens, and a fourth lens arranged in order from an object side, and an aperture stop arranged between the first lens and the second lens. The second lens and the third lens are joined each other. The first lens is a negative meniscus lens having a convex surface at an object side. The second lens is a positive lens having a convex surface having a large curvature at an image side. The third lens is a negative lens having a concave surface having a large curvature at an object side. The fourth lens is a positive lens having a convex surface having a large curvature at an image side. The following conditions are satisfied: | 06-02-2011 |
20110211267 | Objective optical system - The invention provides a high-performance objective lens that is capable of implementing focusing relative to an object point distance change with no or little angle-of-view change, and is well compatible with a high-pixel type imaging device. The objective optical system comprises, in order from an object side thereof, a first group of negative power, a second group of positive power, an aperture stop, and a third group of positive power. Only the second group moves thereby implementing focusing relative to an object point distance change, with satisfaction of the following conditions (1)-1, (1)-2 and (8): | 09-01-2011 |
20110304929 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens includes a first group having a positive or negative refractive power, a second group having a positive refractive power, a third group having a positive or negative refractive power, which are sequentially arranged from the object side of the imaging lens. The first group includes an aperture stop, and the second group includes a positive lens, and a cemented lens of a positive lens and a negative lens. The third group is composed of a cemented lens of a positive lens and a negative lens, and the following formula (1) is satisfied: | 12-15-2011 |
20120026609 | Imaging optical system, and imaging apparatus incorporting the same - The invention provides an imaging optical system comprising, in order from an object side to an image side thereof, a first lens group of positive refracting power, a second lens group having positive or negative refracting power and a third lens group of positive refracting power. The optical system includes an aperture stop located between an object-side surface in the first lens group and an object-side surface in the second lens group. The lens on the most object side of the first lens group and the lens on the most image side of the third lens group remain constantly fixed, and upon focusing from a far distance to a near distance, only the second lens group moves axially. The third lens group comprises a front lens subgroup of positive refracting power located on the object side and a rear lens subgroup of negative refracting power located on the image side, with the largest axial air separation in the third lens group interposed between them. | 02-02-2012 |
20120075729 | Optical system, and imaging apparatus incorporating the same - An imaging optical system has, in order from an object side to an image side, a first lens group, an aperture stop, a second lens group and a third lens group. A first lens, in said third lens group, is movable along an optical axis thereby implementing focusing from a focusing-on-infinity state to a focusing-on-a-near-distance state, with satisfaction of: | 03-29-2012 |
20120176690 | OPTICAL LENS MODULE - An optical lens module is provided, including a first lens, a second lens, a third lens, and an aperture stop formed in the first lens by wafer level processing. The first lens, the second lens, and the third lens are sequentially arranged from an object side to an image side along an optical axis of the optical lens module. The first lens has a convex surface and a concave surface, respectively, on an object side and an image side. The second lens has a concave surface and a convex surface, respectively, on the object side and the image side. The third lens has a convex peripheral portion on the image side, wherein the convex peripheral portion forms a surface with a concave center on the image side, and the surface has a deflection point. | 07-12-2012 |
20120206823 | PROJECTION LENS - The projection lens comprises: the first of the components of negative power, facing with its concave surface to the object and cemented of negative and positive menisci, the second component comprising a positive meniscus, having the concave surface facing an object side, the third one being a biconvex lens, the forth one being a positive meniscus, having the concave surfaces facing an image side, the fifth one being negative, faced with its concave surface to the image and being cemented of biconvex and biconcave lenses. The technical objective is that relative aperture (1:1.8) is increased, brightness at the image edge field is enhanced against that in the centre (0.91), in the image, formed by the lens, the required value of negative distortion is provided (−3%), an image quality is enhanced, conditions of lens operating are provided for the object, located at the finite distance. | 08-16-2012 |
20120212841 | PROJECTION LENS AND PROJECTION APPARATUS - A projection lens for projecting an image beam is provided. The image beam is converted by a light valve from an illumination beam irradiating the light valve. The projection lens includes a first lens group, a second lens group, and a third lens group. The first lens group is disposed on a transmission path of the image beam, and has a first optical axis. The second lens group is disposed on both a transmission path of the illumination beam and the transmission path of the image beam, and between the light valve and the first lens group. The second lens group has a second optical axis. The second optical axis is inclined with respect to the first optical axis. The third lens group is disposed on the transmission path of the image beam, and between the first lens group and the second lens group. A projection apparatus is also provided. | 08-23-2012 |
20120212842 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens includes: a first lens group; a diaphragm; a second lens group having positive refractive power; and a third lens group having negative refractive power, which are arranged in order from an object side, wherein the first lens group is configured by at least one positive lens and one negative lens, wherein the second lens group is configured by a negative lens, a positive lens, and a positive lens in order from the object side, and wherein, when focusing is performed, the second lens group is moved in a direction of an optical axis. | 08-23-2012 |
20120262806 | OPTICAL IMAGE LENS ASSEMBLY - This invention provides an optical image lens assembly in order from an object side to an image side comprising: a first lens group has a first lens element with positive refractive power; a second lens group has a second lens element with negative refractive power; and a third lens group has at least three lens elements with refractive power; wherein a lens element in the third lens group closest to an image plane has negative refractive power and a concave image-side surface; wherein while a distance between an imaged object and the optical image lens assembly changes from far to near, focusing is performed by moving the second lens group along the optical axis toward the image plane. By such arrangement and focusing adjustment method, good image quality is achieved and less power is consumed. | 10-18-2012 |
20120314305 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens includes: a first lens group; a second lens group having positive refractive power; and a third lens group having negative refractive power, which are arranged in order from an object side, wherein the first lens group includes a former lens group having a negative lens in a most object side, a diaphragm, and a rear lens group having positive refractive power, wherein the second lens group includes a first lens having negative refractive power, a second lens having positive refractive power, and a third lens having positive refractive power in an order from the object side, and wherein, when focusing is performed, the second lens group is moved in an optical axis direction. | 12-13-2012 |
20120314306 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens includes: a first lens group; a second lens group having positive refractive power; and a third lens group having negative refractive power, which are arranged in order from an object side, wherein the first lens group includes a former lens group having a negative lens in a most object side, a diaphragm, and a rear lens group, and wherein, when focusing is performed, the second lens group is moved in the optical axis direction. | 12-13-2012 |
20130003196 | NON-PLANAR FOCAL SURFACE LENS ASSEMBLY - A lens assembly includes a plurality of component lens elements, and a fiber optic face plate having a back surface and a non-planar front surface. The plurality of component lens elements are configured to direct a focused image onto the non-planar front surface of the fiber optic face plate, and the fiber optic face plate is configured to transmit the focused image through the back surface. | 01-03-2013 |
20130094102 | OPTICAL UNIT AND IMAGING APPARATUS - The present invention provides an optical unit and an imaging device, which are capable of providing a small-sized low-cost imaging optical system that has high resolution and high heat resistance. The optical unit comprises at least a first lens group ( | 04-18-2013 |
20130148214 | Imaging Lens - The present invention is directed to an imaging lens with an optical system that comprises the foremost lens group closest to an object and of positive refractivity, the succeeding middle lens group, and the rearmost lens group closest to an image plane and of negative refractivity where the middle lens group, having the first, second, and third lens subgroups disposed in series, is moved axially along the optical axis for focusing, and the foremost lens group includes at least three or more convex lens pieces and a single concave lens piece and meets predetermined requirements defined in formulae. The imaging lens has a quality image stabilizing system in which a light-weight lens piece(s) is moved in directions perpendicular to the optical axis. | 06-13-2013 |
20130170050 | IMAGING LENS WITH THREE LENS ELEMENTS, AND ELECTRONIC APPARATUS HAVING THE SAME - An imaging lens includes first, second, and third lens elements arranged from an object side to an image side in the given order. The first lens element has a positive refracting power, and has a convex object-side surface facing toward the object side. The second lens element has a concave object-side surface facing toward the object side, and a convex image-side surface facing toward the image side. The third lens element has an image-side surface facing toward the image side and having a concave portion in a vicinity of an optical axis of the imaging lens. The imaging lens satisfies |ν | 07-04-2013 |
20130170051 | IMAGING LENS - An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; and a third lens having positive refractive power, arranged in this order from an object side to an image plane side. Further, the first lens is formed in a shape so that a curvature radius of a surface thereof on the object side is positive. The second lens is formed in a shape so that a curvature radius of a surface thereof on the object side is negative and a curvature radius of a surface thereof on the image plane side is positive. The third lens is formed in a shape so that a curvature radius of a surface thereof on the object side and a curvature radius of a surface thereof on the image plane side are both positive. | 07-04-2013 |
20130308210 | PLASTIC OPTICAL LENS - This invention provides an injection-molded plastic optical lens comprising, in order from a center to an edge thereof: an optical effective portion, a connecting portion and a peripheral portion that are concentrically formed; wherein the lens has an outer diameter D, the optical effective portion has an edge thickness ET | 11-21-2013 |
20140118853 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens provided with a negative first lens group and a positive second lens group disposed in order from the object side. The first lens group is composed of a first group first lens which is a biconcave negative single lens, and the second lens group is composed of a positive second group first lens, an aperture stop, a positive second group second lens, and a negative second group third lens disposed in order from the object side. The second group second lens and second group third lens are cemented to form a cemented lens. The imaging lens is configured to satisfy conditional expressions (2): 005-01-2014 | |
20140126074 | IMAGING LENS AND IMAGING APPARATUS - An imaging lens provided with a negative first lens group and a positive second lens group disposed in order from the object side. The first lens group is composed of a first group first lens which is a negative biconcave single lens, and the second lens group is composed of a positive second group first lens, an aperture stop, a positive second group second lens, and a negative second group third lens disposed in order from the object side. The second group second lens and second group third lens are cemented together to form a cemented lens. The imaging lens is configured to satisfy a conditional expression (3) 0.905-08-2014 | |
20140198399 | LENS MODULE AND MANUFACTURING METHOD THEREOF - A method of manufacturing a lens module including following is provided. A first lens plate having a plurality of first lens sections, a second lens plate having a plurality of second lens sections and a third lens plate having a plurality of third lens sections are provided. The first lens sections of the first lens plate are separated to form a plurality of first lens units. The second and third lens plates are connected. A relative position between each of the first lens units and one of the second lens sections corresponding to the first lens unit is adjusted. Each of the first lens units and the second lens section corresponding to the first lens unit are connected. The second and third lens sections are separated to form a plurality of second lens units and a plurality of third lens units connected to the second lens units. | 07-17-2014 |
20140327977 | LENS MODULE AND MANUFACTURING METHOD THEREOF - A method of manufacturing a lens module including following is provided. A first lens plate having a plurality of first lens sections, a second lens plate having a plurality of second lens sections and a third lens plate having a plurality of third lens sections are provided. The first lens sections of the first lens plate are separated to form a plurality of first lens units. The second and third lens plates are connected. A relative position between each of the first lens units and one of the second lens sections corresponding to the first lens unit is adjusted. Each of the first lens units and the second lens section corresponding to the first lens unit are connected. The second and third lens sections are separated to form a plurality of second lens units and a plurality of third lens units connected to the second lens units. | 11-06-2014 |
20150124341 | MACRO CONVERSION LENS - Disclosed is a conversion lens including a sequential assembly of lens elements. The first lens element has a positive refractive power, the second lens element and the third lens element, the second and third lens elements each having a surface convex with respect to the first lens element. The characteristics of at least one lens element are selected to compensate for the use of the conversion lens in water. Desirably the first lens element includes a first part having a negative meniscus lens and a second part forming a bi-convex lens. | 05-07-2015 |
20160161699 | LENS MODULE - A lens module including a first lens having a first extension part extending from an outer edge of the first lens; a second lens disposed on the first lens and contacting an inner peripheral surface of the first extension part; and a third lens disposed on the second lens and contacting a lower surface of the first extension part. | 06-09-2016 |
20160377827 | LENS MODULE AND CAMERA MODULE INCLUDING THE SAME - A lens module includes a lens barrel comprising a hollow portion; a first lens comprising a lens coupling groove formed in one surface thereof, and an outer peripheral surface contacting an inner peripheral surface of the lens barrel; and a second lens comprising a protrusion portion corresponding to the lens coupling groove, wherein the second lens is stacked on the one surface of the first lens and the protrusion portion inserted into the lens coupling groove. | 12-29-2016 |
20170235101 | INTERACTIVE LENS ASSEMBLY | 08-17-2017 |
359785000 | + - + Arrangement | 17 |
20080225411 | Subminiature imaging optical system - There is provided a subminiature imaging optical system utilizing only three sheets of lenses having positive, negative and positive refractive powers, respectively. The subminiature imaging optical system comprising, sequentially from an object side: a first lens having a meniscus shape with a convex object-side surface, the first lens having at least one apherical surface and positive refractive power; a second lens having a meniscus shape with a convex image-side surface, the second lens having at least one spherical surface and negative refractive power; and a third lens having both surfaces formed of an aspherical surface and having positive refractive power. | 09-18-2008 |
20090009890 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE SAME - An optical system includes at least one of a movable lens unit movable in an optical axis direction and a fixed lens unit that is not movable in the optical axis direction. The at least one lens unit includes a plurality of refractive optical elements. The refractive optical elements are made of resin and have focal lengths of the same sign. When φi is a refractive power, with respect to d-line, of the i | 01-08-2009 |
20090284846 | Imaging lens - The present invention provides an imaging lens that includes, in order from an object, a diaphragm S | 11-19-2009 |
20090284847 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING OPTICAL SYSTEM - An optical system includes a first optical element and a second optical element on at least one of an enlargement side and a reduction side relative to a point P at which a light axis and a paraxial chief ray intersect. Each of the first optical element and second optical element is composed of a solid material having a refractive light incident surface and a refractive light emergent surface. The optical system satisfies the following conditional expressions: ΔθgF | 11-19-2009 |
20100321800 | Imaging lens - An imaging lens includes a first lens L | 12-23-2010 |
20110235192 | Objective lens for endoscopes - The inventive objective lens for endoscopes has independently a zooming function and a focusing function, and is capable of magnified viewing. The objective lens has an angle of view (2ω) of 100° or greater, and comprises a positive first group G | 09-29-2011 |
20120162787 | FIXED FOCUS LENS - A fixed focus lens comprising, sequentially from an object side, 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 includes an aperture stop. The second lens group is configured by a single lens element. During focusing, the second lens group moves along an optical axis and the first lens group and the third lens group are fixed with respect to an imaging plane. | 06-28-2012 |
20120194927 | IMAGING LENS - An imaging lens includes, from an object-side to an image-side: a first lens of positive refractive power with a convex surface on the object-side, an aperture stop, a second lens of negative refractive power with a convex surface on the image-side and a meniscus shape, a third lens of positive refractive power with a convex surface on the object-side and a meniscus shape. Specified conditions are satisfied in order to enhance a high brightness and reduce aberrations. | 08-02-2012 |
20130050852 | IMAGING LENS - An imaging lens includes a first lens; a second lens; and a third lens. A curvature radius of an object-side surface and an image plane-side surface of the first lens is positive. The second lens is formed such that a curvature radius of an object-side surface is negative and a curvature radius of an image plane-side surface is positive. A curvature radius of an object-side surface and an image plane-side surface of the third lens is positive. When the first lens has a focal length f | 02-28-2013 |
20130063830 | SUBMINIATURE OPTICAL SYSTEM - Disclosed herein is a subminiature optical system including: a first lens group having positive refractive power; a second lens group having negative refractive power; and a third lens group having positive refractive power, wherein the second lens group is configured of a plurality of lenses of which facing surfaces are bonded to each other and the following Conditional Equation is satisfied: | 03-14-2013 |
20130155528 | OPTICAL LENS SYSTEM FOR IMAGE TAKING - An optical lens system for image taking includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface, a second lens element with negative refractive power having a concave object-side surface and a concave image-side surface with the at least one surface being aspheric, and a third lens element with positive refractive power having a convex object-side surface and a concave image-side surface with the at least one surface being aspheric. The image-side surface of the third lens element includes at least one inflection point. By adjusting spacing between any two lens elements, the optical lens system for image taking has a desirable space allocation and can effectively correct the Petzval Sum in order to obtain superior imaging quality. | 06-20-2013 |
20140049845 | FIXED FOCUS LENS - A fixed focus lens comprising, sequentially from an object side, 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 includes an aperture stop. The second lens group is configured by a single lens element. During focusing, the second lens group moves along an optical axis and the first lens group and the third lens group are fixed with respect to an imaging plane. | 02-20-2014 |
20150085387 | PHOTOGRAPHING LENS, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE PHOTOGRAPHING LENS - Provided is a photographing lens (ML) including a first lens group (G | 03-26-2015 |
359786000 | With multiple element first component | 4 |
20090310232 | IMAGING LENS - An imaging lens includes a first lens group that includes sequentially from an object side, a first lens formed of resin and having a positive refractive power and a second lens formed of resin and having a negative refractive power, the first lens and the second lens collectively forming a cemented lens having a positive refractive power. The imaging lens further includes a second lens group that includes a negative lens having a convex surface directed toward an image plane and a third lens group that includes a positive lens, where the first lens group, the second lens group, and the third lens groups are sequentially arranged from the object side. | 12-17-2009 |
20110242685 | PROJECTION LENS AND PROJECTION-TYPE DISPLAY APPARATUS USING THE LENS - A projection lens is composed of a positive first lens group, a negative second lens group, and a positive third lens group, which are sequentially arranged from the magnification side of the projection lens, and the reduction side of the projection lens is telecentric. Further, the following formulas (1) and (2) are satisfied: | 10-06-2011 |
20120293879 | INTERNAL FOCUS LENS - An internal focus lens comprising sequentially from an object side 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 second lens group is configured by a simple lens element and is moved along an optical axis to perform focusing. The internal focus lens satisfies condition expressions (1) 0.48<|f3|/f<0.73 and (2) 1.0511-22-2012 | |
20130033768 | IMAGING LENS AND IMAGING APPARATUS - Provided is an imaging lens including a fixed first lens group having a positive refractive power and including a plurality of lenses, a second lens group serving as a focus group and including a negative lens, and a third lens group having a positive refractive power that are arranged sequentially from an object side to an image side. A stop is disposed between predetermined lenses of the first lens group, and, on an assumption that a lens group located closer to the object side than the stop of the first lens group is a 1a | 02-07-2013 |
359791000 | + + - Arrangement | 6 |
20090195892 | Image lens module - An imaging lens module includes a fixed diaphragm and an optical module. The optical module includes first, second and third lenses arranged from an object side to an image side in a sequence of: the first lens component of positive refractive power with a meniscus shape, having a convex surface on the object side and at least one aspheric surface; the diaphragm; the second lens component of positive refractive power with a meniscus shape, having a concave surface on the object side and at least one aspheric surface; the third lens component of negative refractive power with two aspheric surfaces, having a concave surface with smaller curvature on the object side, a wavy surface on the image side, and a concave surface on the image side near the optical axis. The imaging lens module is a lens module with the features of high imaging quality, miniaturization, high brightness and high yield rate. | 08-06-2009 |
20090268313 | IMAGING LENS SYSTEM - An imaging lens system, in order from the object side to the image side thereof, includes a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power and an image sensing element. The imaging lens system satisfies the following formulas: L/TTL>1.23, and 0.310-29-2009 | |
20100172034 | OBJECTIVE LENS - An objective lens OL includes, in order from an object, a first lens group G | 07-08-2010 |
20100177407 | LENS SYSTEM - A lens system including: a first lens group having a positive refractive power; a second lens group having a positive refractive power; and a third lens group having a positive or negative refractive power, wherein the first lens group comprises four or less lenses, and the first through third lens groups are movable, independently, during focusing and have magnifications in a range from −1 to 0. | 07-15-2010 |
20100232041 | IMAGING LENS SYSTEM WITH SMALL APERTURE VALUE AND COMPACT SIZE AND IMAGING MODULE HAVING SAME - An imaging module includes an imaging lens system and an image sensor. The imaging lens system includes a first lens, a second lens, and a third lens. The imaging module satisfies the formulae, 2.409-16-2010 | |
20150029602 | IMAGING LENS - An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; and a third lens having negative refractive power, arranged in the order from an object side to an image plane side. The first lens and the third lens respectively have an object-side surface and an image plane-side surface whose curvature radii are both positive. The second lens has an image plane-side surface whose a curvature radius is negative. In addition, when the first lens has refractive power P1, the second lens has refractive power P2, the third lens has refractive power P3, the curvature radius of the image plane-side surface of the second lens is R2r, and the curvature radius of the object-side surface of the third lens is R3f, the imaging lens satisfies specific conditional expressions. | 01-29-2015 |
359792000 | + + + Arrangement | 2 |
20090244724 | OPTICAL SYSTEM, METHOD FOR FOCUSING, AND IMAGING APPARATUS EQUIPPED THEREWITH - Providing an optical system having excellent optical performance over entire focusing range from infinity to a close distance, a method for focusing the optical system, and an imaging apparatus equipped therewith. The optical system includes, in order from an object, a first lens group G | 10-01-2009 |
20150029603 | IMAGING LENS - An imaging lens includes a first lens having positive refractive power; a second lens having positive refractive power; and a third lens having positive refractive power, arranged in the order from an object side to an image plane side. The first lens and the third lens have object-side surfaces and image plane-side surfaces, curvature radii of which are both positive. When the first lens has refractive power P1, the second lens has refractive power P2, the third lens has refractive power P3, the first lens has a focal length f1, and the third lens has a focal length f3, the imaging lens satisfies the following conditional expressions: | 01-29-2015 |