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公开(公告)号：US20250150698A1
公开(公告)日：2025-05-08
申请号：US19018647
申请日：2025-01-13
Inventor： Yoshiaki KURIOKA , Takahiro Kitada
Abstract: An imaging optical system includes lens group Gm located on that is closest to an object among lens groups in which a distance between the lens groups changes during zooming, the lens groups having negative power. Lens group Gm includes, in order from the object side toward an image side, lens element LGmF1 having the negative power, lens element LGmF2 having the negative power, both surfaces of lens element LGmF2 having an aspherical shape, and at least two lens elements having power. The present disclosure provides the imaging optical system having good various aberrations such as spherical aberration, astigmatism, and distortion and an imaging device and a camera system that are provided with the imaging optical system.
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公开(公告)号：US12085700B2
公开(公告)日：2024-09-10
申请号：US17085410
申请日：2020-10-30
Inventor： Takahiro Kitada
IPC: G02B15/177 , G02B15/14 , G02B15/20 , G02B27/00 , H04N23/55
CPC classification number: G02B15/177 , G02B15/1445 , G02B15/20 , G02B27/0025 , H04N23/55
Abstract: An imaging optical system includes: a first lens group having negative power; a second lens group having positive power; a third lens group having negative power; and a fourth lens group having power, which are arranged in this order such that the first lens group is located closest to an object and the fourth lens group is located closest to an optical image. The first lens group includes: a first negative lens; a second negative lens; and a third negative lens which is a meniscus lens having negative power and a convex surface facing the optical image, which are arranged in this order such that the first negative lens is located closest to the object and the third negative lens is located closest to the optical image. During focusing from an infinity focus point toward a close focus point, the third lens group moves along an optical axis.
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公开(公告)号：US11582370B2
公开(公告)日：2023-02-14
申请号：US16437372
申请日：2019-06-11
Inventor： Yoshiaki Kurioka , Takahiro Kitada
Abstract: An imaging optical system includes lens group Gm located on that is closest to an object among lens groups in which a distance between the lens groups changes during zooming, the lens groups having negative power. Lens group Gm includes, in order from the object side toward an image side, lens element LGmF1 having the negative power, lens element LGmF2 having the negative power, both surfaces of lens element LGmF2 having an aspherical shape, and at least two lens elements having power. The present disclosure provides the imaging optical system having good various aberrations such as spherical aberration, astigmatism, and distortion and an imaging device and a camera system that are provided with the imaging optical system.
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Patent Agency Ranking
公开(公告)号：US12231758B2
公开(公告)日：2025-02-18
申请号：US18095240
申请日：2023-01-10
Inventor： Yoshiaki Kurioka , Takahiro Kitada
Abstract: An imaging optical system includes lens group Gm located on that is closest to an object among lens groups in which a distance between the lens groups changes during zooming, the lens groups having negative power. Lens group Gm includes, in order from the object side toward an image side, lens element LGmF1 having the negative power, lens element LGmF2 having the negative power, both surfaces of lens element LGmF2 having an aspherical shape, and at least two lens elements having power. The present disclosure provides the imaging optical system having good various aberrations such as spherical aberration, astigmatism, and distortion and an imaging device and a camera system that are provided with the imaging optical system.
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公开(公告)号：US11906717B2
公开(公告)日：2024-02-20
申请号：US17673017
申请日：2022-02-16
Inventor： Takahiro Kitada , Takehiro Nishioka , Yoshio Matsumura , Takakazu Bito , Kunio Dohno
CPC classification number: G02B15/1461 , G02B7/10 , G02B7/14
Abstract: A zoom lens system includes at least six lens groups, each of which has power. An interval between each pair of lens groups that are adjacent to each other among the at least six lens groups changes while the zoom lens system is zooming. Each of three lens groups, which are respectively located closest, second closest, and third closest to an image plane, out of the at least six lens groups consists of one or more bonded lenses.
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公开(公告)号：US11899190B2
公开(公告)日：2024-02-13
申请号：US17243984
申请日：2021-04-29
Inventor： Takahiro Kitada , Yuka Kudo , Masafumi Sueyoshi , Jindong Li
CPC classification number: G02B15/145121 , G02B13/02 , G02B13/18
Abstract: A zoom lens system includes: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; a fourth lens group having negative power; and a fifth lens group having positive power. The first lens group is made up of a single lens. The second lens group is made up of four lenses. The zoom lens system is configured to zoom from a wide-angle end toward a telephoto end such that the fifth lens group does not move but the first to fourth lens groups move to change intervals between the lens groups.
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7.发明授权公开(公告)号：US10884224B2
公开(公告)日：2021-01-05
申请号：US15850537
申请日：2017-12-21
Inventor： Yoshiaki Kurioka , Takahiro Kitada
Abstract: An imaging optical system of the present disclosure includes a first lens group having positive power, a second lens group having negative power, a third lens group having the positive power, and a succeeding lens group including one or more lens groups in order from an object side toward an image side. The third lens group includes a lens having the positive power and a lens having the positive power in order from the object side toward the image side, and includes a lens L3R1 having the positive power, a lens L3R2 having the positive power, and a lens L3R3 having the negative power in order from the image side toward the object side. The lens L3R2 and the lens L3R3 are bonded, the lens L3R1 moves to optically correct image blur, and at least a distance between the second lens group and the third lens group changes during zooming from a wide angle end to a telephoto end.
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公开(公告)号：US10012822B2
公开(公告)日：2018-07-03
申请号：US15419143
申请日：2017-01-30
Inventor： Takahiro Kitada , Shunichiro Yoshinaga , Takakazu Bito
IPC: G02B27/64 , G02B15/14 , G02B15/163 , G02B15/20 , G02B15/22
CPC classification number: G02B15/163 , G02B15/173 , G02B15/20 , G02B15/22 , G02B27/646
Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move.Here, condition (1) below is satisfied. 0.24
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