Reverse Telephoto Patents (Class 359/749)
  • Patent number: 11314063
    Abstract: A zoom lens includes a first lens group with a negative refractive power, a second lens group with a positive refractive power, and an aperture stop disposed in and movable with the second lens group. Each of the first lens group and the second lens group moves individually. The zoom lens further includes a doublet lens disposed on a first side of the aperture stop and between the first lens group and the aperture stop, and at most two lenses including at least one aspheric lens are disposed on a second side of the aperture stop.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: April 26, 2022
    Assignee: YOUNG OPTICS INC.
    Inventors: Hung-You Cheng, Kuo-Chuan Wang, Yu-Hung Chou
  • Patent number: 11022789
    Abstract: An observation imaging apparatus includes an insertion unit, an imaging lens, and an image sensor. The imaging lens is disposed in such a manner that an axial principal ray of an observation subject side surface of a lens is tilted with respect to a normal line passing through the center of gravity of a section of the insertion unit, the section passing through the center of an effective imaging range of the image sensor and having the smallest area. A point on the axial principal ray at which the distance between the normal line and the axial principal ray is smallest is located on the image side relative to the observation subject side surface of the lens and on the observation subject side relative to the image sensor. The observation imaging apparatus satisfies a predetermined conditional expression.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: June 1, 2021
    Assignee: TAMRON CO., LTD.
    Inventors: Yasuhiko Obikane, Yoshito Iwasawa, Yuichi Imamiya, Yuri Koyama
  • Patent number: 11012621
    Abstract: An imaging device includes a free-form lens having a shape in which (i) in a long-side direction of an imaging element, a resolution that changes along an optical axis long-side resolution curve, and the resolution that changes along a distant point long-side resolution curve in a position away from an optical axis, (ii) in a short-side direction, the resolution that changes along an optical axis short-side resolution curve, and the resolution that changes along a distant point short-side resolution curve in the position away from the optical axis, (iii) the distant point long-side resolution curve follows a shape of the optical axis long-side resolution curve, and has a higher resolution than the optical axis long-side resolution curve, and (iv) the distant point short-side resolution curve follows a shape of the optical axis short-side resolution curve, and has a higher resolution than the optical axis short-side resolution curve.
    Type: Grant
    Filed: December 1, 2019
    Date of Patent: May 18, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shigenori Yatsuri, Yoshio Matsumura
  • Patent number: 10996455
    Abstract: An objective optical system consists of, in order from an object side, a first lens group having a negative refractive power, which is stationary all the time, 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, which is stationary all the time. At a time of focusing from an object point at a long distance to an object point at a short distance, the second lens group moves toward the object side and the third lens group moves toward an image side. The following conditional expressions (1), (5), and (7) are satisfied: 2<fG2/f<8??(1) 0.2<(t34f?t34n)/f<0.5??(5) ?8<fG1/f<?2??(7).
    Type: Grant
    Filed: September 28, 2019
    Date of Patent: May 4, 2021
    Assignee: OLYMPUS CORPORATION
    Inventor: Hideyasu Takato
  • Patent number: 10890739
    Abstract: An optical image capturing lenses includes, in order from an object side to an image side, a front lens group, a stop, and a rear lens group. The front lens group includes, in order from the object side to the image side, at least a first lens element and a second lens element. The first lens element has a convex object-side surface and a concave image-side surface. The rear lens group includes, in order from the object side to the image side, at least a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The sixth lens element is made of plastic material. The object-side surface and the image-side surface of the sixth lens are aspheric. The sixth lens element has at least one inflection point formed on at least one of the object-side surface and the image-side surface thereof.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: January 12, 2021
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 10845572
    Abstract: An imaging optical system including a first lens having negative refractive power; a second lens having negative refractive power; a third lens having positive refractive power; an aperture stop; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a six lens arranged in that order from an object side. The first lens is a negative lens with a concave surface facing the image side. The second lens is a negative lens with a concave surface facing the object side. The second lens and the third lens are joined together to form a cemented lens have positive refractive power.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: November 24, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Kazuyasu Ohashi
  • Patent number: 10809493
    Abstract: An optical lens includes two lens groups and an aperture stop. A total number of lenses with refractive power of the two lens groups is larger than three, and the two lens groups includes an aspheric lens with negative refractive power. The aperture stop is disposed between the two lens groups. The optical lens satisfies the following condition: 0.05>[y(?)?(EFL*sin ?)]/(EFL*sin ?)>?0.3, where ? denotes a half field of view, y(?) denotes an image height of an image plane for visible light with respect to the half field of view ?, and EFL denotes an effective focal length for visible light of the optical lens.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: October 20, 2020
    Assignee: Rays Optics Inc.
    Inventors: Kuo-Chuan Wang, Sheng-Tang Lai, Hsin-Te Chen, Chen-Cheng Lee
  • Patent number: 10678026
    Abstract: An optical system includes a first lens having negative refractive power and having two concave surfaces, a second lens having positive refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having refractive power, a sixth lens having refractive power, and a seventh lens having refractive power. The first to seventh lenses are sequentially disposed from an object side. Whereby an aberration improvement effect may be increased and high resolution and a wide angle may be implemented.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: June 9, 2020
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Ju Hwa Son
  • Patent number: 10473893
    Abstract: The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens and a sixth lens. The first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of glass material, the fourth lens is made of glass material, the fifth lens is made of plastic material, and the sixth lens is made of plastic material. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: November 12, 2019
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Hiroyuki Teraoka, Lei Zhang, Yanmei Wang, Jing Zhao
  • Patent number: 10321033
    Abstract: Disclosed herein is a light field camera, where both a curved shape of a curved microlens array and a curved shape of a curved image sensor are the same as a curved shape of a wide-angle main lens, and a sum of a reciprocal of a vertical distance between the curved microlens array and the curved image sensor and a reciprocal of a vertical distance between the curved microlens array and a virtual image plane of the wide-angle main lens is equal to a reciprocal of a focal length of the curved microlens array, which resolves a problem of poor image quality such as blurring and distortion that is caused when a wide-angle main lens is used in a light field camera and a flat microlens array and a flat image sensor cannot match a curved virtual image plane of the wide-angle main lens.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: June 11, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jing Xu, Cong Zhao
  • Patent number: 10310240
    Abstract: 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, a fourth lens unit having a negative refractive power, and a rear unit including at least one lens unit. In the zoom lens, the locus of movement, the focal length, the amount of displacement during zooming, and the shapes of lens surfaces are appropriately set for each lens unit.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: June 4, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shin Kuwashiro
  • Patent number: 10295800
    Abstract: An embodiment of this disclosure provides an optical lens, which includes, in order from an object side to an image-forming side, a first lens with negative refraction power; a second lens with negative refraction power; a third lens with positive refraction power; a fourth lens with positive refraction power; and a fifth lens with negative refraction power; wherein the second lens has an Abbe number vd2, the fifth lens has a refractive index nd5, and 20?vd2?30 and nd5?1.9.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: May 21, 2019
    Assignee: ABILITY ENTERPRISE CO., LTD.
    Inventor: Huai-Yi Huang
  • Patent number: 10245108
    Abstract: A lens system includes: a plurality of aligned lenses; a first lens having negative refractive power; a second lens having negative refractive power; a third lens with positive refractive power; and, a fourth lens with positive refractive power; a light beam transmitted through the first, second, third and fourth lenses is first diverged by the first and second lenses, collimated by the third lens and focused by the fourth lens to form a small spot at the focal plane.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: April 2, 2019
    Assignee: LUMENIS LTD.
    Inventors: Zipora Ozer Armon, Eyal Benisty, Arie Kraisler, Roy Ramati
  • Patent number: 10101565
    Abstract: An imaging lens includes, in order from the object side to the image side, a positive first lens group, a stop, a positive second lens group, and a positive third lens group. The first lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The second lens group is of a three lens configuration and includes a positive lens and a negative lens. The third lens group includes, consecutively in order from the most object side thereof, a negative lens and a positive lens. The imaging lens satisfies Conditional Formula (1): 0<f1/f2<2, which is related to the focal length f1 of the first lens group and the focal length f2 of the second lens group.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 16, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Ryosuke Nagami, Takashi Suzuki
  • Patent number: 10007086
    Abstract: An image capturing optical lens assembly includes, in order from an object side to an image side, a front lens group, an aperture stop and a rear lens group. The front lens group includes at least two lens elements, wherein one lens element closest to an imaged object of the at least two lens elements has negative refractive power and an image-side surface being concave. The rear lens group includes at least four lens elements, wherein one lens element closest to an image surface of the at least four lens elements has an image-side surface being concave. The image capturing optical lens assembly has a total of eight lens elements.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: June 26, 2018
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Tung-Yi Hsieh, Hsuan-Chin Huang, Wei-Yu Chen
  • Patent number: 9958653
    Abstract: An imaging optical system includes, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, the first lens unit includes a first negative lens and a first cemented lens, the second lens unit G2 includes a second cemented lens, one or more positive lens components, and a third cemented lens, and the first cemented lens includes a negative lens and has a surface having a concave surface facing toward the reduction side, the second cemented lens has a positive refractive power and has a surface having a concave surface facing toward the enlargement side, and the third cemented lens has a positive refractive power and includes a negative lens on the reduction side.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: May 1, 2018
    Assignee: OLYMPUS CORPORATION
    Inventor: Keisuke Ichikawa
  • Patent number: 9864170
    Abstract: A miniature image pickup lens includes a first lens, a second lens, an aperture, a third lens, a fourth lens, and a fifth lens arranged in sequence along an optical axis from an object side to an image side. The first lens is a negative meniscus lens with a convex surface towards the object side and a concave surface towards the image side. The second lens is a positive lens with a convex surface towards the object side. The third lens is a positive biconvex lens, and the fourth lens is a negative biconcave lens. The fifth lens has a convex surface towards the object side.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: January 9, 2018
    Assignee: Kinko Optical Co., Ltd.
    Inventors: Sze-Ying Chen, Yi-Fang Chen
  • Patent number: 9739997
    Abstract: An objective lens including a first lens group immovable in changing magnification from a normal observation state to a close-up observation state, a second lens group arranged nearer to the image side than the first lens group and moving along the optical axis in the change of magnification, a third lens group arranged nearer to the image side than the second lens group and immovable in the change of magnification, and an aperture stop arranged between the second lens group and an image plane and immovable in the change of magnification, and the objective lens satisfying the following condition: 1.24<|F1f/Fn|<1.8 where F1f denotes the focal length of a lens that is placed nearest to the object side in the first lens group and Fn denotes the focal length of the whole system in the normal observation state.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: August 22, 2017
    Assignee: OLYMPUS CORPORATION
    Inventor: Keisuke Takada
  • Patent number: 9709782
    Abstract: An image-capturing optical system includes: a positive first lens group; and a positive second lens group, wherein the positive first lens group and the positive second lens group are arranged in order from an object side in the image-capturing optical system, the image-capturing optical system focuses on a close object by moving the second lens group as a whole along a light axis toward the object side, a lens closest to the object side in the second lens group has a convex surface facing the object side, a lens closest to an image side in the second lens group is a positive meniscus lens having a convex surface facing the image side, the image-capturing optical system satisfies following condition expressions (1) to (3) 2.2<1Gr_Fl/FL<3.8??(1) 0.9<2Gr_Fl/FL<1.5??(2), and 0.45<1Gr_R_nop/1Gr_Thi<0.85??(3).
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: July 18, 2017
    Assignee: Konica Minolta, Inc
    Inventor: Keiko Yamada
  • Patent number: 9645364
    Abstract: An imaging lens consists of, in order from the object side, a front group having a negative refractive power, a stop, and a rear group having a positive refractive power. The front group consist of a front-group negative lens group that consists of three negative lenses and has a negative refractive power, and a front-group positive lens group that includes one positive lens and one negative lens and has a positive refractive power, where the negative lens is disposed at the most image-side position. The rear group includes two positive lenses and two negative lenses. The imaging lens satisfies condition expression (1): 0.95<?fAn/f<2, where fAn is a focal length of the front-group negative lens group, and f is a focal length of the entire system.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: May 9, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Kazuyoshi Okada, Ping Sun
  • Patent number: 9612419
    Abstract: A lens assembly includes a first lens group, a stop and a second 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 includes a first lens and a second lens, wherein the first lens is with negative refractive power and the second lens is with positive refractive power. The second lens group includes a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the third lens and the fifth lens are with negative refractive power, and the fourth lens and the sixth lens are with positive refractive power. The lens assembly satisfies 0.23?f/TL?0.45, wherein f is an effective focal length of the lens assembly and TL is a distance from an object side surface of the first lens to an image plane along the optical axis.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: April 4, 2017
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL INTERNATIONAL LTD.
    Inventor: Rong-Shun Syu
  • Patent number: 9482851
    Abstract: A wide-angle lens is disclosed. The wide-angle lens includes a first lens element L1, a second lens element L2, a third lens element L3, an aperture diaphragm S, a fourth lens element L4 and a fifth lens element L5 arranged from an object plane to an image plane. The first element L1 is a meniscus lens element having a negative focal power and protruding toward the object plane, the second element L2 is a meniscus lens element having a negative focal power and protruding toward the object plane, the third element L3 is a meniscus lens element having a positive focal power and protruding toward the image plane, the fourth element L4 is a meniscus lens element having a negative focal power and protruding toward the object plane, and the fifth element L5 is a lens element having a positive focal power.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: November 1, 2016
    Assignee: SIRTEC INTERNATIONAL (SUZHOU) CO. LTD
    Inventors: Satoshi Do, C. S. Cheng
  • Patent number: 9477081
    Abstract: An imaging lens, consisting of a first lens group, a top, and a second lens group having a positive refractive power, in order from the object side, in which the first lens group is composed of a first front lens group having a negative refractive power and a first rear lens group having a positive refractive power in order from the object side, the first rear lens group is composed of a cemented lens formed of a negative lens and a positive lens, the first front lens group at least includes four negative lenses, and at least two of the negative lenses included in the first front lens group satisfy a conditional expression given below: 70<?d1n??(1).
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: October 25, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Hiroshi Yamada, Michio Cho
  • Patent number: 9423592
    Abstract: An imaging lens includes: a first lens group; a stop; a positive second lens group; and a negative third lens group which is fixed while focusing, in order from the object side. The first lens group includes at least one positive lens, at least one cemented lens, and a negative meniscus lens having a concave surface toward the image side, in order from the object side. The second lens group includes a cemented lens formed by a biconcave lens and a biconvex lens and a biconvex lens, in order from the object side. The third lens group includes a negative meniscus lens having a convex surface toward the object side, a biconcave lens, and a biconvex lens, in order from the object side. The first lens group, the stop, and the second lens group move integrally along the optical axis to focus from an infinite to a finite distance.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: August 23, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Ukyo Tomioka
  • Patent number: 9389399
    Abstract: A wide angle lens includes a first lens group having negative refractive power, as a whole, a second lens group having positive refractive power, as a whole, and a third lens group having positive refractive power, as a whole, in this order from an object side. The first lens group includes a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least one cemented lens. The material of at least one of the three negative meniscus lenses in the first lens group satisfies the following conditional expression (1), and the material of at least one of the other negative meniscus lenses in the first lens group satisfies the following conditional expressions (2) and (3): ?da>81??(1); ?db<25??(2); and ??gFb>0.015??(3).
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: July 12, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Noboru Koizumi
  • Patent number: 9291878
    Abstract: A single focal length lens system comprising at least a positive first lens unit and a second lens unit, wherein the first lens unit includes a first sub lens unit E which successively comprises a negative lens element A, a positive lens element B, a negative lens element C and a positive lens element D, a second sub lens unit comprising at least one lens element is a focusing lens unit in the second lens unit, and the conditions: 1.0<|fW/fA|<2.2, 0.5<fW/fB<2.0, 0.5<|fW/fC|<1.7, and 0.5<fW/fD<1.8 (fW: focal length of the lens system, fA: focal length of the lens element A, fB: focal length of the lens element B, fC: focal length of the lens element C, fD: focal length of the lens element D) are satisfied.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: March 22, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Kyoichi Miyazaki
  • Patent number: 9261678
    Abstract: A wide angle lens consists of a first lens group having negative refractive power as a whole, a second lens group having positive refractive power as a whole, and a third lens group having positive refractive power as a whole in this order from an object side. The first lens group consists of a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least two cemented lenses. The third lens group consists of a 3a-th lens group consisting of a positive meniscus lens with its convex surface facing the object side and a 3b-th lens group that includes at least two cemented lenses and has positive refractive power as a whole, in this order from the object side.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: February 16, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Noboru Koizumi, Michio Cho
  • Patent number: 9182570
    Abstract: A fish eye lens system and a photographing apparatus including the same, the fish eye lens system including, in an order from an object side to an image side: a first lens group having a negative refractive power; an aperture stop; and a second lens group having a positive refractive power, wherein the first lens group includes, in the order from the object side to the image side, a (1-A)-th lens group having a negative refractive power, a (1-B)-th lens group having a negative refractive power, and a (1-C)-th lens group including at least one positive lens, and wherein the (1-B)-th lens group is moved to perform focusing.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: November 10, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Min Heu
  • Publication number: 20150146085
    Abstract: In an optical system including, in order from an object side to an image side: a front unit (LF) having a negative refractive power; an aperture stop; and a rear unit (LR) having a positive refractive power, the front unit (LF) includes a meniscus-shaped negative lens (g1) closest to the object side, and a focal length (fw) of the entire optical system, a focal length (fg1) of the meniscus-shaped negative lens (g1), and a curvature radius (R2) of a lens surface on the image side of the meniscus-shaped negative lens (g1) are appropriately set.
    Type: Application
    Filed: October 14, 2014
    Publication date: May 28, 2015
    Inventor: Takahiro Hatada
  • Patent number: 9042039
    Abstract: An imaging lens includes negative first lens, negative second lens, third lens of a plano-convex shape having a convex surface directed toward an object side or of a positive meniscus shape having a convex surface directed toward the object side, and a fourth lens of a plano-convex shape having a convex surface directed toward an image side or of a positive meniscus shape having a convex surface directed toward the image side, which are arranged in this order from the object side. Further, the following conditional formula (6) is satisfied: 0.75?(R8?R9)/(R8+R9)?1.0??(6), where R8: a curvature radius of an object-side surface of the fourth lens, and R9: a curvature radius of an image-side surface of the fourth lens.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: May 26, 2015
    Assignee: FUJIFILM CORPORATION
    Inventor: Taro Asami
  • Patent number: 9036278
    Abstract: An imaging lens consists of a negative first lens, a negative second lens, a third lens of a plano-convex shape having a convex surface directed toward an object side or of a positive meniscus shape having a convex surface directed toward the object side, and a fourth lens of a plano-convex shape having a convex surface directed toward an image side or of a positive meniscus shape having a convex surface directed toward the image side, which are arranged in this order from the object side. Further, the following conditional formula (1) is satisfied: 2.25<?d2/?d3??(1), where ?d2: an Abbe number of a material of the second lens for d-line, and ?d3: an Abbe number of a material of the third lens for d-line.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: May 19, 2015
    Assignee: FUJIFILM CORPORATION
    Inventor: Taro Asami
  • Publication number: 20150116848
    Abstract: An imaging lens consists of a first lens group, a second lens group, an aperture stop and a third lens group that has positive refractive power in this order from an object side. The first lens group consists of an L11 lens having positive refractive power, an L12 lens having negative refractive power, an L13 meniscus lens having negative refractive power with its concave surface facing an image side, an L14 lens having negative refractive power with its concave surface facing the object side and two or three lenses, each having positive refractive power, in this order from the object side. The second lens group consists of an L2p lens having positive refractive power and an L2n lens having negative refractive power.
    Type: Application
    Filed: December 30, 2014
    Publication date: April 30, 2015
    Inventors: Hiroshi YAMADA, Michio CHO
  • Publication number: 20150109690
    Abstract: A wide angle lens consists of a first lens group having negative refractive power as a whole, a second lens group having positive refractive power as a whole, and a third lens group having positive refractive power as a whole in this order from an object side. The first lens group consists of a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least two cemented lenses. The third lens group consists of a 3a-th lens group consisting of a positive meniscus lens with its convex surface facing the object side and a 3b-th lens group that includes at least two cemented lenses and has positive refractive power as a whole, in this order from the object side.
    Type: Application
    Filed: December 24, 2014
    Publication date: April 23, 2015
    Inventors: Noboru KOIZUMI, Michio CHO
  • Publication number: 20150109689
    Abstract: A wide angle lens includes a first lens group having negative refractive power, as a whole, a second lens group having positive refractive power, as a whole, and a third lens group having positive refractive power, as a whole, in this order from an object side. The first lens group includes a positive meniscus lens with its convex surface facing the object side and three negative meniscus lenses, each with its convex surface facing the object side, in this order from the object side. The second lens group includes at least one cemented lens. The material of at least one of the three negative meniscus lenses in the first lens group satisfies the following conditional expression (1), and the material of at least one of the other negative meniscus lenses in the first lens group satisfies the following conditional expressions (2) and (3): ?da>81??(1); ?db<25??(2); and ??gFb>0.015??(3).
    Type: Application
    Filed: December 23, 2014
    Publication date: April 23, 2015
    Inventor: Noboru KOIZUMI
  • Patent number: 9013811
    Abstract: An imaging lens formed of 4 lenses, in which a negative first lens having a meniscus shape with a convex surface on the object side, a biconvex positive second lens, a negative third lens having a concave surface on the image side, and a positive fourth lens having a convex surface on the object side, arranged in order from the object side, and the imaging lens satisfies conditional expressions (1): L12/f<0.82; (2): 2.3<L12×R2F2/f2<10.0; (5): ?1.3<f1/f<?0.9; and (6): 48<v1 simultaneously, where, L12 is the air equivalent distance between the first lens and the second lens, f is the focal length of the entire lens system, R2F is the radius of curvature of the object side lens surface of the second lens, f1 is the focal length of the first lens, and v1 is the Abbe number of the first lens with respect to the d-line.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: April 21, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Masao Mori
  • Publication number: 20150098138
    Abstract: An optical system includes, in order from object side: a positive first lens unit; and a positive second lens unit moving during focusing. The second lens unit includes, in order from object side, a front unit, an aperture stop, and a positive rear unit. The first unit includes a negative lens that has a convex surface facing object side and is arranged closest to object side, and three or more positive lenses on image side of the negative lens. A distance, on optical axis, from a lens surface on object side of a second positive lens counted from image side of the three or more positive lenses to a lens surface closest to image side of the first unit, and a distance, on optical axis, between a lens surface closest to object side and that closest to image side of the first unit are each appropriately set.
    Type: Application
    Filed: September 22, 2014
    Publication date: April 9, 2015
    Inventor: Takashi Shirasuna
  • Publication number: 20150085377
    Abstract: Provided is an optical system having, in order from an Object, a first lens group (G1) having negative refractive power and a second lens group (G2), wherein the first lens group (G1) includes, in order from the object, a first negative lens (L11) and a second negative lens (L12) having a concave surface facing the object, and the following conditional expression (1) is satisfied: 7.94?(?fn12)/f<48.00??(1) where fn12 denotes a focal length of the second negative lens (L12), and f denotes a focal length of the entire optical system.
    Type: Application
    Filed: February 26, 2013
    Publication date: March 26, 2015
    Inventor: Atsushi Suzuki
  • Patent number: 8964310
    Abstract: An imaging lens includes a negative first lens, a negative second lens, a third lens of a plano-convex shape having a convex surface directed toward an object side or of a positive meniscus shape having a convex surface directed toward the object side, and a fourth lens of a plano-convex shape having a convex surface directed toward an image side or of a positive meniscus shape having a convex surface directed toward the image side, which are arranged in this order from the object side. Further, the following conditional formula (4) is satisfied: 1.0<D2/f<2.5??(4), where f: a focal length of an entire system, and D2: a distance on an optical axis between the first lens and the second lens.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: February 24, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Taro Asami
  • Publication number: 20150042773
    Abstract: To allow placement of optical members by providing a long back focus, make aberrations less subject to manufacturing errors, and reduce variations in aberrations during focusing. An endoscopic objective optical system includes, in order from an object side, a front group with negative refractive power, a focusing lens, and a rear group with positive refractive power, wherein: the endoscopic objective optical system satisfies conditional expressions (1) to (4) below: 4<FB/FL??(1) FL/|Fc|<0.1??(2) ?3<F—F/FL<?0.9??(3) 2.5<F—R/FL<5??(4) where FB is back focus of the entire system, FL is a focal length of the entire system, fc is a focal length of the focusing lens, |fc| is an absolute value of fc, F_F is a focal length of the front group, and F_R is a focal length of the rear group.
    Type: Application
    Filed: June 19, 2014
    Publication date: February 12, 2015
    Inventors: Tsutomu Uzawa, Masahiro Katakura
  • Publication number: 20150022907
    Abstract: An objective lens for an endoscope performs focusing from a farthest point object to a nearest point object by moving, along optical axis Z, at least one lens group excluding a most object-side lens group. The following conditional formulas (1) and (2) are satisfied: 1.2?ft/fw??(1); and 0.0<(fm?fw)/(ft?fw)?0.5??(2), where ft: a focal length of an entire system when the objective lens has been focused on the nearest point object, fw: a focal length of the entire system when the objective lens has been focused on the farthest point object, dt: an object distance to the nearest point object, dw: an object distance to the farthest point object, dm, which is represented by dm=(2×dw×dt)/(dw+dt): an object distance to a middle point object, and fm: a focal length of the entire system when the objective lens has been focused on the middle point object.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 22, 2015
    Inventor: CHIKARA YAMAMOTO
  • Patent number: 8928999
    Abstract: An imaging lens assembly comprises a fixing diaphragm and an optical set including five lenses. An arranging order from an object side to an image side is: a first lens; a second lens; a third lens having a lens with a positive refractive power defined near the optical axis and a convex surface directed toward the image side; a fourth lens having a lens with a positive refractive power defined near the optical axis and a convex surface directed toward the image side; and a fifth lens having a concave surface with a corrugated contour directed toward the image side and disposed near the optical axis. At least one surface of the five lenses is aspheric. By the concatenation between the lenses and the adapted curvature radius, thickness, interval, refractivity, and Abbe numbers, the assembly attains a big diaphragm with ultra-wide-angle, a shorter height, and a better optical aberration.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: January 6, 2015
    Assignee: Ability Opto-Electronics Technology Co., Ltd.
    Inventor: Hung-wen Lee
  • Patent number: 8879162
    Abstract: A zoom lens comprises, in order from its object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive power. The first lens unit comprises a first lens having a negative refractive power and a second lens having a positive refractive power. The zoom lens satisfies the following conditional expressions (1), (2), and (3): n1n?1.70??(1), n1p?1.70??(2), and |?1n??1p?31??(3), where n1n is the refractive index of the first lens having a negative refractive power in the first lens unit for the d-line, ?1n is the Abbe constant of the first lens having a negative refractive power in the first lens unit, n1p is the refractive index of the second lens having a positive refractive power in the first lens unit for the d-line, and ?1p is the Abbe constant of the second lens having a positive refractive power in the first lens unit.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 4, 2014
    Assignee: Olympus Imaging Corp.
    Inventors: Tetsuya Yanai, Mayu Miki, Masahiro Imamura, Toshihide Nozawa
  • Publication number: 20140307332
    Abstract: A wide angle lens system and an electronic apparatus including the same are provided. The wide angle lens system includes a first lens group having a negative refractive power, and a second lens group having a positive refractive power. The second lens group is spaced apart from the first lens group by a maximum air gap. The first lens group and the second lens group are sequentially arranged from an object side toward an image side. The second lens group includes a positive 2-1 lens group, a negative 2-2 lens group, and a positive 2-3 lens group, and focusing is performed by moving the 2-2 lens group along an optical axis.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 16, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Shuji Yoneyama
  • Patent number: 8861085
    Abstract: A fixed focal length lens has a focal length of a whole system shorter than a back focus. The fixed focal length lens includes an aperture stop, and an image-stabilizing lens unit that moves in a direction including a component of a direction orthogonal to an optical axis to reduce an image blur. The conditions of 0.1<f/|fis|<0.5 and ?0.35<Dis/DL<0.25 are met, where f is the focal length of the whole system, fis is a focal length of the image-stabilizing lens unit, Dis is a distance from the aperture stop to a surface farthest from the aperture stop of the image-stabilizing lens unit, and DL is a distance from a first surface closest to an object side to a final surface closest to an image side of the fixed focal length lens. A sign of the distance is positive in a direction from the object side to the image side.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: October 14, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Makoto Nakahara
  • Publication number: 20140268367
    Abstract: An imaging lens includes: a first lens group; an aperture stop; and a second lens group having a positive power, in this order from an object side. The first lens group includes a first lens having a negative power and a second lens having a positive power. The imaging lens satisfies Conditional Formulae (1), (2), and (3): ?0.50<f/f1<0.20??(1) 0.08<d12/f<0.35??(2) 2.5<TL/Y<4.0??(3) wherein f is the focal length of the entire system, f1 is the focal length of the first lens group, d12 is a distance along an optical axis from the image side lens surface of the first lens to the object side lens surface of the second lens, TL is the distance along the optical axis from the most object side lens surface within the first lens group to an imaging surface Sim, and Y is a maximum image height, when focused on an object at infinity.
    Type: Application
    Filed: May 9, 2014
    Publication date: September 18, 2014
    Applicant: FUJIFILM Corporation
    Inventor: Daiki KAWAMURA
  • Publication number: 20140218811
    Abstract: The endoscope objective lens is configured such that focusing from the farthest object to the nearest object is achieved by moving at least one lens group other than the most object-side lens group along the optical axis. One of the at least one lens group to be moved during focusing is a negative lens group. The one negative lens group that is moved during the focusing consists of a cemented lens that is formed by a positive lens and a negative lens cemented together in this order from the object side. The cemented surface of the cemented lens is oriented such that the concave surface faces the object side. Given conditional expressions are satisfied.
    Type: Application
    Filed: April 14, 2014
    Publication date: August 7, 2014
    Applicant: FUJIFILM Corporation
    Inventor: Chikara YAMAMOTO
  • Patent number: 8797659
    Abstract: A macro lens and an imaging apparatus include, in the order from an object side to an image side, a first lens group, a second lens group, and a third lens group. Focusing is performed by fixing the first lens group and the third lens group, and by moving the second lens group having a positive refractive power as a whole on the optical axis in focusing from an infinite object to a close distance object. The first lens group has a plane S1 and a plane S2 of curvature radii of a same sign and satisfying a specified condition.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: August 5, 2014
    Assignee: Konica Minolta Optics, Inc.
    Inventor: Yoshihito Souma
  • Patent number: 8743468
    Abstract: A wide converter lens that is disposed on an object side of a main lens and changes the viewing angle, wherein the wide converter lens includes: a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power, wherein the first lens, the second lens, and the third lens are sequentially ordered from the object side to the image side, and the wide converter lens satisfies the following inequality: 2vd?50 where 2vd is an Abbe number of the second lens.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: June 3, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jin-woo Kim
  • Patent number: 8738320
    Abstract: A light condensing lens includes a plurality of lenses disposed side by side in a splitting direction of a view angle to condense incident light over a range corresponding to respective split portions of the view angle. The view angle is split in a direction orthogonal to an optical axis of the incident light.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: May 27, 2014
    Assignee: Sony Corporation
    Inventors: Kazumasa Kaneda, Yoshito Asoma
  • Publication number: 20140133038
    Abstract: A projection lens includes a first lens group, a second lens group and a third lens group, all of which are arranged in sequence from an projection side to an image source side along an optical axis. The first lens group is with negative refractive power and includes four lenses. The second lens group is with positive refractive power and includes two lenses. The third lens group is with positive refractive power and includes a stop and six lenses.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicants: Asia Optical International Ltd., Sintai Optical (Shenzhen) Co., Ltd.
    Inventor: Tsan-Haw Lee