公开(公告)号：US20190137739A1

公开(公告)日：2019-05-09

申请号：US16238260

申请日：2019-01-02

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA

IPC: G02B13/02 ,  G02B27/64 ,  G02B13/00 ,  H04N5/232 ,  H04N5/225

Abstract: An image forming lens system includes an aperture stop, and an image-side lens unit group which is disposed on an image side of the aperture stop. The image-side lens unit group includes a first image-side lens unit having a negative refractive power, a second image-side lens unit having a positive refractive power, and a third image-side lens unit having a negative refractive power. Any one of the first image-side lens unit, the second image side lens unit, and the third image-side lens unit is a focusing lens unit which moves along the optical axis at the time of focusing, and the following conditional expression (1) is satisfied: 0.06

公开(公告)号：US20170068079A1

公开(公告)日：2017-03-09

申请号：US15355951

申请日：2016-11-18

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA ,  Kenichi NAGASAWA ,  Masaru MOROOKA

IPC: G02B15/177 ,  G02B5/00 ,  G02B27/00

CPC classification number: G02B15/177 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes a front unit having a negative refractive power and a rear unit having a positive refractive power, which includes an aperture stop, and the front unit includes a first lens having a negative refractive power, and the first lens has a meniscus shape of which a convex surface is directed toward the object side, and the rear unit includes a first lens unit A and a second lens unit B, and at the time of zooming from a wide angle end to a telephoto end, a distance between the front unit and the rear unit changes.

Abstract translation: 变焦透镜包括具有负屈光力的前单元和具有正屈光力的后单元，其包括孔径光阑，并且前单元包括具有负屈光力的第一透镜，并且第一透镜具有弯月形状 其中凸面指向物体侧，后部单元包括第一透镜单元A和第二透镜单元B，并且在从广角端到远摄端的变焦时，前方的距离 单元和后置单元发生变化。

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：US20180329186A1

公开(公告)日：2018-11-15

申请号：US15948155

申请日：2018-04-09

Applicant: OLYMPUS CORPORATION

Inventor： Takashi FUJIKURA ,  Yuki ZEN ,  Tomoyuki SATORI ,  Tetsuya YANAI

IPC: G02B15/15 ,  G02B9/64

CPC classification number: G02B15/15 ,  G02B9/64

Abstract: A variable magnification optical system includes 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, and at least one lens unit. A second predetermined positive lens element satisfies conditional expressions (1) and (2) and a second predetermined negative lens element satisfies the following conditional expressions (3) and (4). The second lens unit includes three sub-lens units and the following conditional expressions (5) and (6) are satisfied: 0.520

公开(公告)号：US20210255439A1

公开(公告)日：2021-08-19

申请号：US17189679

申请日：2021-03-02

Applicant: OLYMPUS CORPORATION

Inventor： Takashi FUJIKURA ,  Keisuke ICHIKAWA ,  Shinichi MIHARA

IPC: G02B13/04 ,  G02B15/14

Abstract: A wide-angle optical system includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. At the time of carrying out a focal-position adjustment, the second lens unit is moved. The third lens unit includes a positive single lens on an image side of a cemented surface Sc having a negative refractive power nearest to an image in the third lens unit, and has a plurality of refractive surfaces having a negative refractive power on the object side of the cemented surface Sc. The third lens unit has at least one refractive surface Sp having a positive refractive power which satisfies following conditional expression (1): 0.02

公开(公告)号：US20180267279A1

公开(公告)日：2018-09-20

申请号：US15853235

申请日：2017-12-22

Applicant: OLYMPUS CORPORATION

Inventor： Takashi FUJIKURA ,  Yuki ZEN ,  Tomoyuki SATORI ,  Tetsuya YANAI

IPC: G02B15/167 ,  G02B15/20

CPC classification number: G02B15/167 ,  G02B15/173 ,  G02B15/20

Abstract: A variable magnification optical system includes a plurality of lens element, and includes in order from an object 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, and at least one lens unit. An aperture stop is either positioned between the second lens unit and the third lens unit, or positioned in the third lens unit. At the time of zooming from a wide angle end to a telephoto end, the first lens unit is fixed, the second lens unit moves from the object side to an image-plane side, and at least one of lens units positioned on an image side of the aperture stop moves. The first lens unit includes at least four positive lens elements and at least two negative lens elements.

公开(公告)号：US20180210179A1

公开(公告)日：2018-07-26

申请号：US15927152

申请日：2018-03-21

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA ,  Kenichi NAGASAWA ,  Masaru MOROOKA

IPC: G02B15/177 ,  G02B5/00 ,  G02B27/00 ,  G02B15/20

CPC classification number: G02B15/177 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes a front unit having a negative refractive power; and a rear unit having a positive refractive power, which includes an aperture stop. The front unit includes a first negative refractive power lens, a second negative refractive power lens, and a third positive refractive power lens. The first lens is nearest to an object, and has a meniscus shape with a convex surface directed toward the object side, and the second lens is on an image side of the first lens, and has a meniscus shape with a convex surface directed toward the object side. The rear unit includes a first lens unit A and a second lens unit B, wherein when zooming from a wide angle end to a telephoto end, a distance between the front unit and the rear unit narrows, and a distance between the first lens unit A and the second lens unit B changes. The first lens unit A includes a first sub-lens unit having a positive refractive power, the aperture stop, and a second sub-lens unit. The second sub-lens unit includes a focusing lens unit, and when focusing, only the focusing lens unit moves along an optical axis, and when zooming, a distance between the first sub-lens unit and the second sub-lens unit changes.

公开(公告)号：US20130242156A1

公开(公告)日：2013-09-19

申请号：US13789969

申请日：2013-03-08

Applicant: OLYMPUS CORPORATION

Inventor： Takahiro AMANAI ,  Kenichiro ABE ,  Takuya OTSU ,  Takashi FUJIKURA

IPC: G02B13/04

CPC classification number: G02B13/04 ,  G02B15/177

Abstract: A zoom lens includes in order from an object side, a first lens group having a negative refractive power, 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, and at the time of zooming, the first lens group is fixed, the second lens group moves, the third lens group moves, and the fourth lens group is fixed. The first lens group includes in order from the object side, a negative lens, a reflecting optical element, and a positive lens. The second lens group includes in order from the object side, an aperture stop, a positive lens, a cemented lens having a negative refractive power, and a positive lens. The cemented lens includes a positive lens and a negative lens.

Abstract translation: 变焦透镜从物体侧依次包括具有负折光力的第一透镜组，具有正折光力的第二透镜组，具有负折光力的第三透镜组，以及具有正折射率的第四透镜组 电源，并且在变焦时，第一透镜组被固定，第二透镜组移动，第三透镜​​组移动，并且第四透镜组被固定。 第一透镜组从物体侧依次包括负透镜，反射光学元件和正透镜。 第二透镜组从物体侧依次包括孔径光阑，正透镜，具有负屈光力的胶合透镜和正透镜。 胶合透镜包括正透镜和负透镜。