With Seven Components Patents (Class 359/751)
  • Patent number: 10558021
    Abstract: An imaging lens includes a first lens having at least one aspheric surface; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side is concave near the optical axis. The fifth lens and the sixth lens have specific Abbe's numbers.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: February 11, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Patent number: 10545316
    Abstract: An imaging lens includes a first lens having at least one aspheric surface and positive refractive power; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces and negative refractive power, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The fifth lens is disposed away from the sixth lens by a specific distance on an optical axis. The second lens has a specific Abbe's number.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: January 28, 2020
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Patent number: 10534158
    Abstract: A wide angle lens includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are disposed in order from an object side. The first, second, third and sixth lenses are negative meniscus lenses, and the fourth, fifth and seventh lenses are positive lenses. The fifth lens is a glass lens, and the second, third, fourth, sixth and seventh lenses are plastic lenses. The sixth lens and the seventh lens constitute a cemented lens. When a center curvature radius on an image side face of the fifth lens is R52 and a focal length of an entire wide angle lens is f0, the center curvature radius R52 and the focal length f0 satisfy the following conditional expression: 2×f0?|R52|?5×f0.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 14, 2020
    Assignee: NIDEC SANKYO CORPORATION
    Inventor: Yosuke Kanzaki
  • Patent number: 10527824
    Abstract: An optical image capturing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first, the second and the third lens elements all have refractive power. The fourth lens element with refractive power has both surfaces being aspheric. The fifth lens element with refractive power has both surfaces being aspheric. The sixth lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof and both surfaces being aspheric. The seventh lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof, wherein both surfaces being aspheric, and at least one surface has at least one inflection point thereon.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: January 7, 2020
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Tsung-Han Tsai, Hsin-Hsuan Huang
  • Patent number: 10502931
    Abstract: An image picking-up system includes seven lens elements, which are, in order from an object side to an image side, a first lens group including a first lens element and a second lens element, a second lens group including a third lens element and a fourth lens element, and a third lens group including a fifth lens element, a sixth lens element and a seventh lens element. The third lens element has positive refractive power. The fourth lens element has an image-side surface being concave in a paraxial region thereof. At least one surface of object-side surfaces and image-side surfaces of the seven lens elements includes at least one inflection point.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: December 10, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 10451850
    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, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh 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 plastic material, the fifth lens is made of plastic material, the sixth lens is made of plastic material, and the seventh lens is made of plastic material. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 22, 2019
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Setsu Sato, Lei Zhang, Yanmei Wang, Yang Zhang
  • Patent number: 10254515
    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, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 9, 2019
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Kenji Oinuma, Lei Zhang, Yanmei Wang, Dan Zhang
  • Patent number: 10247922
    Abstract: The present disclosure discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: April 2, 2019
    Inventors: Kenji Oinuma, Lei Zhang, Yanmei Wang, YanLi Xie
  • Patent number: 10234661
    Abstract: A wide-angle lens includes a first lens group, a second lens group, and an aperture arranged in that sequence from object side to image side. The first lens group as a whole has a positive refractive power, and includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has a negative refractive power. The second lens has a negative refractive power. The third lens has a negative refractive power. The fourth lens has a positive refractive power. The second lens group as a whole has a positive refractive power, and includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The fifth lens has a positive refractive power. The sixth lens has a negative refractive power. The seventh lens has a positive refractive power. The eighth lens has a positive refractive power.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: March 19, 2019
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Ming-Lin Lee
  • Patent number: 10228541
    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, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: March 12, 2019
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Rongbao Shi, Lei Zhang, Yanmei Wang
  • Patent number: 10222588
    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, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens further satisfies specific conditions.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: March 5, 2019
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Setsu Sato, Lei Zhang, Yanmei Wang
  • Patent number: 10197773
    Abstract: An optical image capturing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first, the second and the third lens elements all have refractive power. The fourth lens element with refractive power has both surfaces being aspheric. The fifth lens element with refractive power has both surfaces being aspheric. The sixth lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof and both surfaces being aspheric. The seventh lens element with refractive power has an image-side surface having at least one convex shape at a peripheral region thereof, wherein both surfaces being aspheric, and at least one surface has at least one inflection point thereon.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: February 5, 2019
    Assignee: LARGAN PRECISION CO., LTD.
    Inventors: Tsung-Han Tsai, Hsin-Hsuan Huang
  • Patent number: 10126526
    Abstract: An imaging lens includes a first lens having at least one aspheric surface; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces, arranged in this order from an object side to an image plane side. The first lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis thereof. The seventh lens is formed in a shape so that a surface thereof on the image plane side is concave near the optical axis thereof. The first lens and the sixth lens have specific Abbe's numbers.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: November 13, 2018
    Assignee: KANTATSU CO., LTD.
    Inventors: Yoji Kubota, Kenichi Kubota, Hitoshi Hirano, Tomohiro Yonezawa
  • Patent number: 9897777
    Abstract: There is provided an optical system including: a first lens having positive refractive power; a second lens having positive refractive power; a third lens having refractive power and having a convex object-side surface; a fourth lens having refractive power; and a fifth lens having refractive power, wherein the first to fifth lenses are sequentially disposed from an object side, whereby spherical aberration and coma aberration may be improved to realize high resolution in images captured thereby and increase an amount of light incident through the lenses to an image sensor.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: February 20, 2018
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Ju Hwa Son
  • Patent number: 9791675
    Abstract: There is provided super wide angle lens module, including: a first lens having negative refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; and a fifth lens having positive refractive power and having a meniscus shape convex toward an image side, wherein the third lens satisfies Equation 1, Nd3>1.7??Equation 1 where Nd3 represents a refractive index of the third lens.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 17, 2017
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Tae Young Kim
  • Patent number: 9766430
    Abstract: An imaging lens is constituted essentially by six lenses, including: a first lens having a positive refractive power and is of a meniscus shape with a convex surface toward the object side; a second lens having a negative refractive power; a third lens; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power and a concave surface toward the image side; and a sixth lens of a biconcave shape, provided in this order from the object side. The imaging lens satisfies a predetermined conditional formula.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 19, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Motoari Ota, Masato Kondo
  • Patent number: 9753250
    Abstract: A wide angle lens includes in order from an object side, a front lens unit having a positive refractive power, one focusing lens having a negative refractive power, and a rear lens unit having a positive refractive power, and at the time of focusing, the focusing lens moves on an optical axis, and the following conditional expressions (1) and (2) are satisfied. 0.1<f1/SSD<0.5??(1) 3.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: September 5, 2017
    Assignee: OLYMPUS CORPORATION
    Inventors: Akinori Nishio, Masahiro Imamura, Tomoyuki Satori, Koji Nakagawa
  • Patent number: 9638889
    Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with negative refractive power. The second, third, fourth and sixth lens are with refractive power. The fifth lens is with positive refractive power. The lens assembly satisfies: 0.078?BFL/TTL?0.4, 0.01?f/TTL?0.61, (Nd1+Nd2+Nd3+Nd4+Nd5+Nd6)/6<(Nd2+Nd3)/2 wherein BFL is a distance from an image side surface of the sixth lens to an image plane along the optical axis, TTL is a distance from the convex surface of the first lens to the image plane along the optical axis, f is an effective focal length of the lens assembly, and Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 are indexes of refraction of the first, second, third, fourth, fifth and sixth lenses.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: May 2, 2017
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.
    Inventors: Po-Yuan Shih, Po-Yu Chen
  • Patent number: 9519123
    Abstract: An imaging lens consists of, in order from the object, a negative first lens, a positive second lens, a positive third lens, a negative fourth lens, a positive fifth lens, a positive sixth lens, and a negative seventh lens. When ?d7 is the Abbe's number of the material for the seventh lens, f is the focal length of the entire system, and f5 is the focal length of the fifth lens, the following conditional formulae are satisfied: ?d7<55??(2) 1.25<f5/f??(10).
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 13, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Taro Asami
  • Publication number: 20150022908
    Abstract: An imaging lens substantially consists of a front-group consisting of a first lens having a negative meniscus shape with its convex surface facing an object side, a second lens having negative refractive power, a third lens having positive refractive power, a fourth lens having a negative meniscus shape with its concave surface facing an image side and a fifth lens having positive refractive power, and the front-group having positive refractive power as a whole, a stop, and a rear-group consisting of a sixth lens having positive refractive power and a seventh lens having a negative meniscus shape with its concave surface facing the object side, and the rear-group having positive refractive power as a whole, in this order from the object side. A predetermined conditional formula about a combined focal length of the first lens and the second lens, and a focal length of an entire system is satisfied.
    Type: Application
    Filed: October 7, 2014
    Publication date: January 22, 2015
    Inventor: Ukyo TOMIOKA
  • Patent number: 8891181
    Abstract: A fixed-focus projection lens has a first lens group and a second lens group in sequence along an optical axis from a screen side to a light modulator side. The first lens group has a positive refractive power, and the second lens group has a positive refractive power. The first lens group has two lenses, and the refractive powers of the lenses are negative and positive. The second lens group has five lenses, and the refractive powers of the lenses respectively are negative, negative, positive, positive, and positive. The fixed-focus projection lens has the features of small size and high optical performance.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: November 18, 2014
    Assignee: Asia Optical Co., Inc.
    Inventor: Tsan-Haw Lee
  • Patent number: 8780464
    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: February 24, 2012
    Date of Patent: July 15, 2014
    Assignee: Largan Precision Co., Ltd.
    Inventor: Hsin-Hsuan Huang
  • Patent number: 8717686
    Abstract: An optical system WL has, in order from an object, a first lens group G1 having negative refractive power and a second lens group G2 having positive refractive power, wherein the first lens group G1 is fixed and the second lens group G2 moves upon focusing from an object at infinity to an object at a finite distance, and the second lens group G2 is formed of a front group G2a located closer to the object than an aperture stop S disposed in the second lens group G2, and a rear group G2b located closer to an image than the aperture stop S.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: May 6, 2014
    Assignee: Nikon Corporation
    Inventors: Hiroshi Yamamoto, Issei Tanaka
  • Patent number: 8587873
    Abstract: Wide-angle projection lens, as well as optical engines and projection display devices comprising such projections lens are described. In one embodiment, a wide-angle projection lens is described comprising in sequential order from a screen side a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of positive refractive power; and a fourth lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the wide-angle projection lens (F) to the focal length of each of the lens groups (F1, F2, F3, and F4) is such that |F1/F|>1.3, F2/F>2, 1<F3/F<2 and 1.5<F4/F<8.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: November 19, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Zhisheng Yun, Stephen J. Willett, Ernesto M. Rodriguez, Jr.
  • Patent number: 8531785
    Abstract: The present invention provides a projection prime lens including first lens group, a second lens group, and a third lens group arranged in sequence along an optical axis from a screen side to a light modulator side. The first lens group has negative refractive power and includes a first lens with negative refractive power and a second lens with negative refractive power. The second lens group has positive refractive power and includes a third lens with positive refractive power and a fourth lens with positive refractive power The third lens group has positive refractive power and includes a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power. Therefore, the projection prime lens of the present invention has a small size and a good image quality.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: September 10, 2013
    Assignee: Asia Optical Co., Inc.
    Inventors: Yuan-Fan Liang, Tsan-Haw Lee
  • Patent number: 8422143
    Abstract: A retrofocus wide-angle lens system is provided, wherein the entire the wide-angle lens system is divided at a position that satisfies the following condition (1) between a theoretical front lens group having a negative refractive power, and a theoretical rear lens group having a positive refractive power including the diaphragm, at a minimum focal length, and wherein a flat parallel plate is disposed at the position that satisfies the following condition (1): 1.2<|fF/f|<4.0 . . . (1), wherein fF designates the focal length of the theoretical front lens group having a negative refractive power, and f designates the focal length of the entire the wide-angle lens system.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: April 16, 2013
    Assignee: Pentax Ricoh Imaging Company, Ltd.
    Inventor: Masakazu Saori
  • Patent number: 8385008
    Abstract: An optical lens system with a wide field of view comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, one of an object-side surface and an image-side surface being aspheric. There are seven lens elements with refractive power. By adjusting the arrangement of curvature, refractive power of the respective lens elements and a stop, sufficient field of view can be obtained and the aberrations of the system can be corrected in order to obtain good image quality.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: February 26, 2013
    Assignee: Largan Precision Co., Ltd.
    Inventors: Dung-Yi Hsieh, Hsin-Hsuan Huang
  • Patent number: 8331041
    Abstract: Provided is an imaging optical system and an image acquisition apparatus that can be suitably used in a small-diameter endoscope while having an ultra-wide angle of view. Provided is an image optical system (1) containing, in order from the object side, a negative front group (FG), an aperture stop (S), and a positive back group (BG), wherein the front group (FG) contains, in order from the object side, a negative first lens (L1) and a negative second lens (L2), and the back group (BG) contains a cemented lens (CL) constituted of at least three lenses (L5, L6, L7) joined together.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: December 11, 2012
    Assignee: Olympus Medical Systems Corp.
    Inventors: Masahiro Katakura, Hideyasu Takato, Yuji Kamo
  • Publication number: 20120212836
    Abstract: An optical lens system with a wide field of view comprises, in order from the object side to the image side: a first lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a second lens element; a third lens element; a fourth lens element having a concave object-side surface and a convex image-side surface; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power; a seventh lens element, one of an object-side surface and an image-side surface being aspheric. There are seven lens elements with refractive power. By adjusting the arrangement of curvature, refractive power of the respective lens elements and a stop, sufficient field of view can be obtained and the aberrations of the system can be corrected in order to obtain good image quality.
    Type: Application
    Filed: June 14, 2011
    Publication date: August 23, 2012
    Inventors: Dung-Yi HSIEH, Hsin-Hsuan Huang
  • Patent number: 8243129
    Abstract: An objective lens includes, in order from an object side, a front group having negative refractive power, an aperture stop, and a rear group having positive refractive power, wherein the front group includes, in order from the object side, a first lens which is a negative meniscus lens with a convex surface turned to the object side and a second lens which is a negative lens with a concave surface turned to the object side; the rear group includes, in order from the object side, a positive third lens and a fourth lens made up of a positive lens and a negative lens cemented together, and the objective lens satisfies conditional expression (1) below: ?0.8<f—F/f—R<?0.3 ??(1), where f_F is a focal length of the front group, and f_R is a focal length of the rear group.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: August 14, 2012
    Assignee: Olympus Medical Systems Corp.
    Inventor: Tsutomu Uzawa
  • Patent number: 8107174
    Abstract: A wide-angle lens includes, in order from an object side, a first lens group G1 having negative refractive power, and a second lens group G2 having positive refractive power. The first lens group includes at least one negative meniscus lens having a convex surface facing the object side. The second lens group includes, in order from the object side, a positive lens, a negative lens and a positive lens. Given conditional expressions are satisfied.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: January 31, 2012
    Assignee: Nikon Corporation
    Inventor: Haruo Sato
  • Patent number: 7946717
    Abstract: A projection optical system including a first optical system configured to form a second image conjugate to a first image and a second optical system configured to include a reflective optical element which reflects light from the second image and to project a third image conjugate to the second image onto a projection surface is provided, wherein the first optical system has a Petzval sum with a sign opposite to a sign of a Petzval sum of the second optical system.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: May 24, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Issei Abe, Kazuhiro Fujita, Atsushi Takaura
  • Patent number: 7944626
    Abstract: A wide angle lens module includes a first lens and a second lens with negative refracting power, a third lens and a fourth lens with positive refracting power, a fifth lens with negative refracting power, a sixth lens with positive refracting power, and a seventh lens with negative refracting power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are assembled in order from an object side to an image side.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: May 17, 2011
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chun-Ling Lin
  • Patent number: 7859770
    Abstract: A fixed-focus lens including a first lens group and a second lens group is provided. The first lens group is disposed between a magnified side and a reduced side and includes a first lens and a second lens arranged in sequence from the magnified side to the reduced side. The refractive powers of both the first lens and the second lens are negative, and the first lens is an aspheric lens. The second lens group is disposed between the first lens group and the reduced side and includes a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in sequence from the magnified side to the reduced side. The refractive powers of the seven lenses from the third lens to the ninth lens are respectively positive, negative, positive, negative, positive, negative, and positive in sequence.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: December 28, 2010
    Assignee: Young Optics Inc.
    Inventors: Yuan-Hung Su, Chien-Hsiung Tseng, Yi-Hao Kang
  • Patent number: 7796348
    Abstract: A wide angle lens module includes a first lens and a second lens with negative refracting power, a third lens and a fourth lens with positive refracting power, a fifth lens with negative refracting power, a sixth lens with positive refracting power, and a seventh lens with negative refracting power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are disposed in order from an object side to an image side.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: September 14, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chun-Ling Lin
  • Patent number: 7505209
    Abstract: A fixed-focus lens suitable for projecting an image beam from a light valve onto a screen is provided. The fixed-focus lens comprises a first lens group, a second lens group, and a third lens group arranged in sequence. The third lens group is disposed near the light valve. The first lens group having a negative refractive power comprises at least an aspheric lens. The second lens group having a positive refractive power comprises at least a lens. The third lens group having a positive refractive power comprises at least four lenses.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: March 17, 2009
    Assignee: Young Optics Inc.
    Inventors: Yi-Hao Kang, Chao-Yi Yeh
  • Patent number: 7502180
    Abstract: The invention relates to a compact image-formation optical system that is diminished in a diametrical direction with as few lenses as possible while well adapting to an wide-angle arrangement having a half angle of 90° or greater, and an imaging system incorporating the same. The image-formation optical system comprises, in order from its object side, a first lens L1 that is a negative lens, a second lens L2 that is a meniscus lens concave on its object side, an apertures stop S, and a lens group G having positive refracting power.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: March 10, 2009
    Assignee: Olympus Imaging Corp.
    Inventor: Yuichi Tsuchimochi
  • Publication number: 20090052057
    Abstract: A wide angle lens module includes a first lens and a second lens with negative refracting power, a third lens and a fourth lens with positive refracting power, a fifth lens with negative refracting power, a sixth lens with positive refracting power, and a seventh lens with negative refracting power. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are disposed in order from an object side to an image side.
    Type: Application
    Filed: April 3, 2008
    Publication date: February 26, 2009
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: CHUN-LING LIN
  • Patent number: 7324293
    Abstract: A wide-angle lens system includes a negative front lens group and a positive rear lens group, in this order from the object. The negative front lens group includes a negative first sub-lens group and a positive second sub-lens group, in this order from the object. The positive rear lens group includes cemented lens elements having a positive R1 lens element and a negative R2 lens element, a positive R3 lens element having a convex surface facing toward the image, and a positive R4 lens element, in this order from the object. The wide-angle lens system satisfies the following conditions: ?0.8<f1a/f1b<?0.1 ??(1) 0.6<f/fR<1.1 ??(2) wherein f1a designates the focal length of the negative first sub-lens group; f1b designates the focal length of the positive second sub-lens group; f designates the focal length of the entire wide-angle lens system; and fR designates the focal length of the positive rear lens group.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: January 29, 2008
    Assignee: PENTAX Corporation
    Inventor: Koji Kato
  • Patent number: 7317581
    Abstract: A fisheye lens system includes a negative first lens group and a positive second lens group, which are defined with respect to a maximum air-distance between lens elements constituting the fisheye lens system. The negative first lens group includes a first negative meniscus lens element having the convex surface facing toward the object, a second negative meniscus lens element having the convex surface facing toward the object, and a negative third lens element.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: January 8, 2008
    Assignee: PENTAX Corporation
    Inventors: Takayuki Ito, Jun Hirakawa
  • Patent number: 6603610
    Abstract: A wide-angle lens system includes a negative first lens group, and a positive second lens group. The first lens group includes a positive lens element, and a negative lens element. The wide-angle lens system satisfies the following conditions: 0<(&phgr;1-2+&phgr;2-1)/&phgr;<0.3 . . . (1); 0.5<HF/HL<0.9 . . .
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: August 5, 2003
    Assignee: Pentax Corporation
    Inventors: Masayuki Murata, Takayuki Ito
  • Publication number: 20030137750
    Abstract: A retrofocus wide-angle lens is formed of only three lens groups, in order from the object side, a first lens group of negative refractive power, a second lens group that includes a stop, and a third lens group of positive refractive power. The first lens group is at the object end of the retrofocus wide-angle lens and includes, in order from the object side, a plurality of negative lens components and a plurality of positive lens components. The first lens group includes three lens groups with particular lens features, the first of which, from the object side, also includes two lens groups with particular features. Various combinations of lens elements satisfy two conditions for ratios of absolute values of focal lengths for the various combinations of lens elements that assist in achieving excellent imaging.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 24, 2003
    Inventor: Katsuhisa Tsutsumi
  • Publication number: 20030117721
    Abstract: In a wide-angle lens system having a long back focal length, the various types of aberration, particularly distortion, are kept small. The wide-angle lens system 100 is disposed in front of a ⅓″ CCD camera 40 and the focal length (f) for all lens groups is 3.0 mm, the F-number is 3.0 and the half-field angle is 46°.
    Type: Application
    Filed: December 23, 2002
    Publication date: June 26, 2003
    Applicant: Elmo Company, Limited
    Inventors: Yasuhiro Kondo, Kazuyoshi Yamada
  • Patent number: 6545824
    Abstract: The improved inner-focus, wide-angle lens system of retrofocus configuration comprises, in order from the object side, a negative first lens group 10, a positive second lens group 20, and a positive third lens group 30 having a diaphragm; the second lens group 20 moves along the optical axis during focusing and the lens system satisfies the following conditions (1) and (2): 0.5<|f1/f|<1.2  (1) 0.7<f2/f<1.8  (2) where f is the focal length of the overall system at focusing at infinity, f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group. The lens system has a half viewing angle of about 44° and an F number of about 3.5.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: April 8, 2003
    Assignee: Pentax Corporation
    Inventor: Takayuki Sensui
  • Patent number: 6493157
    Abstract: An image-capturing lens is formed of front and rear lens groups having negative and positive refractive power, respectively, in order from the object side. The rear lens group is formed of, in relative sequential order from the most object side of the rear lens group, a biconvex lens element that is cemented to a biconcave lens element, a biconvex lens element, and a biconvex lens element. A specified condition is satisfied so as to make the cemented lens of the rear lens group insensitive to de-centering errors which may occur either in making the cemented lens or in assembling the image-capturing lens.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: December 10, 2002
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventor: Yoshikazu Shinohara
  • Publication number: 20020060860
    Abstract: A wide-angle lens system includes a negative first lens group, and a positive second lens group, in this order from the object. The second lens group includes a positive 2F sub-lens group and a positive 2R sub-lens, in this order from the object. Upon focusing from infinity to a closer object distance, an Fa lens group constituted by the first lens group and the positive 2F sub-lens group which are arranged to move integrally, and an Fb lens group constituted by the positive 2R sub-lens group are independently moved from the image side toward the object side so that the distance between the Fa lens group and the Fb lens group are made shorter.
    Type: Application
    Filed: August 28, 2001
    Publication date: May 23, 2002
    Applicant: ASAHI KOGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Masyuki Murata, Takayuki Ito
  • Publication number: 20020012177
    Abstract: A retro focus type wide-angle lens comprises a front group having a negative refracting power and a rear group having a positive refracting power. The front group comprises a first lens made of a negative meniscus lens, a second lens made of a biconvex lens, a third lens made of a negative meniscus lens, and a fourth lens made of a positive meniscus lens. The rear group comprises a cemented lens in which a fifth lens made of a negative lens and a sixth lens made of a positive lens are cemented together, and a seventh lens made of a positive lens. This wide-angle lens further satisfies predetermined conditional expressions.
    Type: Application
    Filed: May 23, 2001
    Publication date: January 31, 2002
    Applicant: Fuji Photo Optical Co., Ltd.
    Inventor: Katsuhisa Tsutsumi
  • Patent number: 6275343
    Abstract: A projection optical system has, from the enlargement side to the reduction side, a first, a second, and a third lens unit, and an aperture diaphragm. The negatively-powered first lens unit includes only a negative lens element and has at least one aspherical surface. The positively-powered second lens unit includes at least one positive lens element. The positively-powered third lens unit includes a lens element. The aperture diaphragm is disposed at the front focal point of the third lens unit. The lens element of the third lens unit is made of a material of which anomalous partial dispersibility and Abbe number are defined.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: August 14, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Katsuhiro Takamoto, Jun Nishikawa
  • Publication number: 20010007512
    Abstract: A wide-angle lens system includes a negative first lens group and a positive second lens group with a diaphragm, in this order from an object. Upon focusing, the positive second lens group is arranged to be moved along the optical axis.
    Type: Application
    Filed: December 11, 2000
    Publication date: July 12, 2001
    Applicant: ASAHI KOGAKU KOGYO KABUSHIKI KAISHA
    Inventor: Takayuki Sensui
  • Patent number: 6181477
    Abstract: In an imaging lens unit configured of two lenses, the deterioration of the optical performance due to the eccentricity is suppressed for an improved assembling property, while at the same time correcting the various aberrations in satisfactory manner. A meniscus first lens (L1) having a weak refracting power, and a meniscus second lens (L2) having positive refracting power with the convex surface thereof directed toward the image surface are arranged sequentially from the object side toward the image surface (IMG). The conditions f2/f>0.9 and nd2>1.55 are met, where f is the focal length of the whole lens system, f2 the focal length of the second lens, and nd2 the refractive index on the d line of the second lens.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: January 30, 2001
    Assignee: Sony Corporation
    Inventor: Koji Okajima