公开(公告)号：US20210096352A1

公开(公告)日：2021-04-01

申请号：US17120569

申请日：2020-12-14

Applicant: OLYMPUS CORPORATION

Inventor： Tsutomu UZAWA

IPC: G02B23/24 ,  G02B9/04 ,  G02B13/00 ,  G02B25/00

Abstract: An objective optical system includes in order from an object side, a front unit having a positive refractive power and a rear unit. The front unit includes in order from the object side, a first lens having a negative refractive power, a second lens having a positive refractive power, and a third lens having a positive refractive power. The rear unit includes one lens or a plurality of lenses and the following conditional expression is satisfied: |(FLag−FLaC)/FLad|

公开(公告)号：US20200069159A1

公开(公告)日：2020-03-05

申请号：US16670973

申请日：2019-10-31

Applicant: OLYMPUS CORPORATION

Inventor： Tsutomu UZAWA

IPC: A61B1/00 ,  G02B13/18 ,  G02B9/58 ,  G02B23/24

Abstract: An optical system for rigid endoscope includes an objective optical system, an eyepiece optical system, and a relay optical system which is disposed between the objective optical system and the eyepiece optical system. The objective optical system includes in order from an object side, a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a negative refractive power. The following conditional expressions (1) and (2) are satisfied: −3

公开(公告)号：US20190121117A1

公开(公告)日：2019-04-25

申请号：US16221569

申请日：2018-12-16

Applicant: OLYMPUS CORPORATION

Inventor： Takahiro AMANAI ,  Tsutomu UZAWA

IPC: G02B23/24 ,  A61B1/055 ,  A61B1/06 ,  G02B23/26 ,  G02B27/00 ,  G02B13/00

Abstract: A relay optical system includes an object-side lens which is disposed nearest to an object, an image-side lens which is disposed nearest to an image, and a cemented lens having a positive refractive power. The object-side lens has a positive refractive power and is disposed such that a convex surface is directed toward an object side. The image-side lens has a positive refractive power and is disposed such that a convex surface is directed toward an image side. A plurality of the cemented lenses is disposed between the object-side lens and the image side lens and the following conditional expression (1) is satisfied: 0.04

公开(公告)号：US20200008660A1

公开(公告)日：2020-01-09

申请号：US16574651

申请日：2019-09-18

Applicant: OLYMPUS CORPORATION

Inventor： Yoshihiro UCHIDA ,  Tsutomu UZAWA

IPC: A61B1/00

Abstract: A stereoscopic-vision endoscope optical system includes a pair of objective optical systems, a pair of relay optical systems, and a pair of image forming optical systems. The image forming optical system includes a first lens unit, a first optical-path bending element, and a second optical-path bending element. The objective optical system and the relay optical system are disposed in a first optical path. A second optical path is formed between the first optical-path bending element and the second optical-path bending element. A third optical path is formed between the second optical-path bending element and a final image. The second optical path is positioned farther from the central axis, than the first optical path. The third optical path is positioned closer to the central axis, than the second optical path.