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公开(公告)号：US3743388A
公开(公告)日：1973-07-03
申请号：US3743388D
申请日：1971-12-21
Applicant: MEOPTA NARODNI PODNIK
CPC classification number: G02B13/24
Abstract: Reproduction objective or lens system, especially suitable for image reproduction in copying machines of a magnification ratio of 1:1, formed by five lenses, axially arranged in such a way that the first lens, nearest to the object plane, is a meniscus lens of negative refractive power and the second lens is a meniscus lens of positive refractive power. Both lenses are either cemented together into one optical member or separated by an air gap, all their refractive surfaces being turned away from said object plane. The next lens is a biconcave lens and the following two lenses are cemented together into one optical member, the first lens of this member being biconcave and the second one biconvex.
Abstract translation: 再现目标或透镜系统，特别适用于由五个透镜形成的以1：1的倍率的复印机中的图像再现，其轴向布置成使得最靠近物平面的第一透镜是弯月透镜 负屈光力，第二透镜是正屈光力的弯月透镜。 两个透镜或者胶合在一起成为一个光学构件或由气隙分开，它们的所有折射表面都被转动离开所述物体平面。 下一个透镜是双凹透镜，并且以下两个透镜被胶合在一起成为一个光学构件，该构件的第一透镜是双凹槽，而第二个透镜是第二个双凸透镜。
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公开(公告)号：US11372201B2
公开(公告)日：2022-06-28
申请号：US16839662
申请日：2020-04-03
Applicant: CANON KABUSHIKI KAISHA
Inventor： Tomohiro Ino , Maki Yokoya
Abstract: An optical system consists of, 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 positive refractive power, a third lens unit having a negative refractive power. A distance between adjacent lens units changes during focusing. The second lens unit moves during the focusing. The following conditional expression is satisfied: −0.20
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公开(公告)号：US10168507B2
公开(公告)日：2019-01-01
申请号：US15717999
申请日：2017-09-28
Applicant: FUJIFILM Corporation
Inventor： Ryosuke Nagami , Tetsuya Ori
Abstract: The imaging lens consists of, in order from the 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 has a positive lens, a positive lens, and a negative lens successively in order from a position closest to the object side. The second lens group consists of one negative lens. The third lens group includes two or less lenses. During focusing, only the second lens group moves. The following conditional expression, which relates to a focal length f of the whole system in a state where the object at infinity is in focus and a focal length f2 of the second lens group, is satisfied: 0.4
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公开(公告)号：US20120050892A1
公开(公告)日：2012-03-01
申请号：US13188860
申请日：2011-07-22
Applicant: Ching-Lung LAI , Yen-Te LEE
Inventor： Ching-Lung LAI , Yen-Te LEE
IPC: G02B9/26
CPC classification number: G02B13/0045
Abstract: A lens module includes a first lens group with a positive refractive power, a second lens group with a negative refractive power, and a third lens group with a positive refractive power. The first lens group essentially consists of a first lens with a negative refractive power, a second lens with a positive refractive power and a third lens with a positive refractive power arranged in order from a magnified side to a reduced side. The second lens group essentially consists of a fourth lens with a negative refractive power and a fifth lens with a positive refractive power arranged in order from the magnified side to the reduced side. The third lens group essentially consists of a sixth lens with a positive refractive power and a seventh lens with a positive refractive power arranged in order from the magnified side to the reduced side.
Abstract translation: 透镜模块包括具有正折光力的第一透镜组，具有负折光力的第二透镜组和具有正折光力的第三透镜组。 第一透镜组基本上由具有负折光力的第一透镜，具有正屈光力的第二透镜和具有正折射力的第三透镜从放大侧排列到缩小侧。 第二透镜组基本上由具有负折射光焦度的第四透镜和具有正折射光焦度的第五透镜从放大侧排列到缩小侧。 第三透镜组基本上由具有正屈光力的第六透镜和具有正折射力的第七透镜组成，其从放大侧到缩小侧依次布置。
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公开(公告)号：US20230213745A1
公开(公告)日：2023-07-06
申请号：US18148349
申请日：2022-12-29
Applicant: CANON KABUSHIKI KAISHA
Inventor： TAKEHARU NAKADA
CPC classification number: G02B13/0015 , G02B9/26
Abstract: An optical system includes, in order from an object side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, and a third lens unit having positive refractive power. A distance between adjacent lens units changes during focusing. During focusing from an infinity object to the closest object, the first and third lens units do not move and the second lens unit moves toward the image side. The third lens unit consists of, in order from the object side, a first subunit having positive refractive power, a second subunit having negative refractive power, and a third subunit having positive refractive power. The second subunit moves in a direction including a component in a direction orthogonal to an optical axis during image stabilization. The second subunit includes positive and negative lenses. A predetermined condition is satisfied.
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Patent Agency Ranking
公开(公告)号：US20230020736A1
公开(公告)日：2023-01-19
申请号：US17858250
申请日：2022-07-06
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takeharu Nakada , Takahiro Hatada
Abstract: An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a diaphragm, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. A distance between adjacent lens units is changed during focusing. The second lens unit is moved to the image side during focusing from an object at infinity to a short-distance object. The first lens unit includes a positive lens closest to an object and two or more negative lenses. The second lens unit consists of a single negative lens. A predetermined condition is satisfied.
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公开(公告)号：US20180095246A1
公开(公告)日：2018-04-05
申请号：US15717999
申请日：2017-09-28
Applicant: FUJIFILM Corporation
Inventor： Ryosuke NAGAMI , Tetsuya ORI
CPC classification number: G02B13/0035 , G02B7/09 , G02B9/26 , G02B13/00 , G02B13/0045 , G02B13/006
Abstract: The imaging lens consists of, in order from the 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 has a positive lens, a positive lens, and a negative lens successively in order from a position closest to the object side. The second lens group consists of one negative lens. The third lens group includes two or less lenses. During focusing, only the second lens group moves. The following conditional expression, which relates to a focal length f of the whole system in a state where the object at infinity is in focus and a focal length f2 of the second lens group , is satisfied: 0.4
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公开(公告)号：US20170351060A1
公开(公告)日：2017-12-07
申请号：US15606843
申请日：2017-05-26
Applicant: CANON KABUSHIKI KAISHA
Inventor： Shigenobu Sugita , Yuichi Gyoda , Suguru Inoue
Abstract: An optical system includes a plurality of lenses. The distance from the object side lens surface of a lens arranged an the most object side to the image plane is longer than the focal length of the entire system. The material of a positive lens G1p arranged on the most object side among positive lenses included in the optical system, and the arrangement and material of a negative lens Gn located on the most object side among negative lenses arranged an the image side of the positive lens G1p are appropriately set.
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公开(公告)号：US3604787A
公开(公告)日：1971-09-14
申请号：US3604787D
申请日：1969-05-16
Applicant: PILKINGTON PERKIN ELMER LTD
Inventor： MERIGOLD PETER ARNOLD , ROGERS PHILIP J
CPC classification number: G02B13/24
Abstract: An optical lens system comprises a symmetrical anastigmatic lens unit in combination with a two-element variable-power unit which permits variation in the total distances between the object and image planes with maintained aberration correction.
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公开(公告)号：US11506872B2
公开(公告)日：2022-11-22
申请号：US16994759
申请日：2020-08-17
Applicant: LARGAN PRECISION CO., LTD.
Inventor： Hsin-Hsuan Huang
Abstract: An imaging lens assembly includes six lens elements, which are, 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 and a sixth lens element. The sixth lens element has negative refractive power. At least one surface of an object-side surface and an image-side surface of at least one lens element of the six lens elements is aspheric.
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