公开(公告)号：US20210255440A1

公开(公告)日：2021-08-19

申请号：US17189353

申请日：2021-03-02

Applicant: OLYMPUS CORPORATION

Inventor： Keisuke ICHIKAWA ,  Takashi FUJIKURA ,  Shinichi MIHARA ,  Yoshihiro UCHIDA

IPC: G02B13/06 ,  G02B13/00 ,  G02B9/64 ,  G02B27/00

Abstract: A wide-angle optical system is a wide-angle optical system having a lens component, and includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. At the time of carrying out a focal-position adjustment from a far point to a near point, the second lens unit is moved from a first position toward a second position. The third lens unit includes not less than three lens components. Not less than three lens components include a first lens component and a second lens component. Each of the first lens component and the second lens component has a positive refractive power, and following conditional expression (1) is satisfied: 0.8

公开(公告)号：US20210239950A1

公开(公告)日：2021-08-05

申请号：US17184784

申请日：2021-02-25

Applicant: OLYMPUS CORPORATION

Inventor： Keisuke ICHIKAWA ,  Takashi FUJIKURA ,  Shinichi MIHARA

IPC: G02B13/06 ,  G02B13/00 ,  G02B9/64 ,  G02B27/00

Abstract: A wide-angle optical system includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third unit having a positive refractive power. At the time of carrying out a focal-position adjustment from a far point to a near point, the second lens unit is moved from a first position toward a second position. The third lens unit includes not less than three lens components, and not less than three lens components include a first lens component and a second lens component. The first lens component is a single lens and the second lens component is a cemented lens. Following conditional expression (1) is satisfied: −0.60

公开(公告)号：US20210181488A1

公开(公告)日：2021-06-17

申请号：US17190453

申请日：2021-03-03

Applicant: OLYMPUS CORPORATION

Inventor： Takashi FUJIKURA ,  Keisuke ICHIKAWA ,  Shinichi MIHARA

IPC: G02B15/14 ,  H04N5/225 ,  G02B7/04 ,  G02B23/24

Abstract: A wide-angle optical system is a wide-angle optical system having a lens component. The lens component has a plurality of optical surfaces, in the lens component, two optical surfaces are in contact with air, and at least one optical surface is a curved surface. The wide-angle optical system includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit, and a third lens unit having a positive refractive power. The second lens unit, for a focal-position adjustment, is moved between a first position and a second position along an optical axis. The third lens unit includes a cemented lens having a positive refractive power and a cemented lens having a negative refractive power, and following conditional expression (1) is satisfied: 0.05

公开(公告)号：US20170261727A1

公开(公告)日：2017-09-14

申请号：US15608421

申请日：2017-05-30

Applicant: OLYMPUS CORPORATION

Inventor： Shinichi MIHARA ,  Hirokazu KONISHI ,  Toyoharu HANZAWA ,  Masahito WATANABE ,  Atsujiro ISHII ,  Tetsuhide TAKEYAMA ,  Ayami IMAMURA

IPC: G02B13/00 ,  G02B15/14 ,  G02B15/16 ,  H04N5/225 ,  H04N5/232

CPC classification number: G02B13/0065 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/007 ,  G02B13/0075 ,  G02B13/009 ,  G02B15/14 ,  G02B15/16 ,  H04N5/2253 ,  H04N5/2254 ,  H04N5/23238 ,  H04N5/23296

Abstract: The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-bending zoom optical system comprising, in order from its object side, a 1-1st lens group G1-1 comprising a negative lens group and a reflecting optical element P for bending an optical path, a 1-2nd lens group G1-2 comprising one positive lens and a second lens group G2 having positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group G2 moves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

公开(公告)号：US20160139374A1

公开(公告)日：2016-05-19

申请号：US15001791

申请日：2016-01-20

Applicant: OLYMPUS CORPORATION

Inventor： Shinichi MIHARA ,  Hirokazu KONISHI ,  Toyoharu HANZAWA ,  Masahito WATANABE ,  Atsujiro ISHII ,  Tetsuhide TAKEYAMA ,  Ayami IMAMURA

IPC: G02B13/00 ,  H04N5/232 ,  G02B15/16 ,  H04N5/225

CPC classification number: G02B13/0065 ,  G02B13/0045 ,  G02B13/006 ,  G02B13/007 ,  G02B13/0075 ,  G02B13/009 ,  G02B15/14 ,  G02B15/16 ,  H04N5/2253 ,  H04N5/2254 ,  H04N5/23238 ,  H04N5/23296

Abstract: The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-banding zoom optical system comprising, in order from its object side, a 1-1st lens group G1-1 comprising a negative lens group and a reflecting optical element P for bending an optical path, a 1-2nd lens group G1-2 comprising one positive lens and a second lens group G2 having positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group G2 moves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

Abstract translation: 本发明涉及一种电子摄像系统，其深度尺寸极大地降低，利用可以克服施加在变焦可移动透镜组的移动的条件的光学系统类型，同时保持高规格和性能。 电子摄像系统包括：光路带式变焦光学系统，其从物体侧依次包括第一透镜组G1-1，其包括负透镜组和用于弯曲光路的反射光学元件P， 包括一个正透镜的第1-2透镜组G1-2和具有正折射光焦度的第二透镜组G2。 为了从广角端到望远端的放大，第二透镜组G2仅向物体侧移动。 电子摄像系统还包括位于变焦光学系统的像侧的电子摄像装置I。