公开(公告)号：US20170343790A1

公开(公告)日：2017-11-30

申请号：US15678791

申请日：2017-08-16

Applicant: OLYMPUS CORPORATION

Inventor： Yasuaki USHIO

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

CPC classification number: G02B23/243 ,  A61B1/00096 ,  A61B1/00163 ,  G02B9/34 ,  G02B9/58

Abstract: There is provided a small-sized and bright objective optical system for endoscope with a wide angle of view and thin diameter, which enables to achieve a highly-defined image.The objective optical system for endoscope includes in order from an object side: a front lens group having a negative refractive power as a whole, an aperture stop; and a rear lens group having a positive refractive power as a whole, wherein the front lens group includes in order from the object side, a first lens which is a single lens having a negative refractive power and a second lens which is a single lens having a positive refractive power, and the rear lens group includes a third lens which is a single lens having a positive refractive power and a cemented lens of a fourth lens having a positive refractive power and a fifth lens having a negative refractive power, and an object-side surface of the first lens is a flat surface, and the second lens has a meniscus shape having a convex surface directed toward an image side, and the third lens has a biconvex shape, and the objective optical system for endoscope satisfies the following conditional expressions (1) and (2) −2.0≦f1/Ih≦−1.39  (1) −0.2≦SF3≦0.61  (2) where, f1 denotes a focal length of the first lens, Ih denotes the maximum image height of the objective optical system for endoscope, and SF3 denotes a shape factor which is expressed by SF3=(R3L+R3R)/(R3L−R3R), when a radius of curvature of an object-side surface of the third lens is let to be R3L and a radius of curvature of an image-side surface of the third lens is lens to be R3R.

公开(公告)号：US20190004307A1

公开(公告)日：2019-01-03

申请号：US16125635

申请日：2018-09-07

Applicant: Olympus Corporation

Inventor： Yasuaki USHIO

IPC: G02B23/24 ,  G02B9/60 ,  G02B13/18 ,  A61B1/00

Abstract: The relay optical system includes in order from an object side, a first cemented lens, a second cemented lens having a positive refractive power, a third cemented lens which is plane-symmetric to the second cemented lens, and a fourth cemented lens which is plane-symmetric to the first cemented lens, and the first cemented lens includes a first lens having a positive refractive power and a second lens having a negative refractive power, and the second cemented lens includes a third lens and a fourth lens, and a shape of the first lens is a biconvex shape, and a shape of the second lens is a biconcave shape, and the following conditional expression (1) is satisfied: −0.4

公开(公告)号：US20250098951A1

公开(公告)日：2025-03-27

申请号：US18373536

申请日：2023-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Kazunari HANANO ,  Kazuaki MURAYAMA ,  Yasuaki USHIO ,  Konrad ANDERS ,  Mario BOCK ,  Jens KLINDER ,  Peter SCHOUWINK

IPC: A61B1/07 ,  A61B1/06

Abstract: A light source device for an endoscope includes a plurality of excitation laser light sources, a plurality of first condensing optical systems, a plurality of first optical fiber bundles, an illumination light source that generates white light, a second condensing optical system that condenses the white light emitted from the illumination light source, a second optical fiber bundle, and a first glass rod of which a first end surface is connected to emission end surfaces of the first and second optical fiber bundles and first emission ends of the first optical fiber bundles and a second emission end of the second optical fiber bundle are bundled. A connecting portion of an illumination optical system of an endoscope is provided on a second end surface of the first glass rod opposite to the first end surface.

公开(公告)号：US20160306162A1

公开(公告)日：2016-10-20

申请号：US15195778

申请日：2016-06-28

Applicant: OLYMPUS CORPORATION

Inventor： Yasuaki USHIO

IPC: G02B23/24 ,  A61B1/04 ,  G02B27/00 ,  A61B1/00 ,  G02B13/04 ,  G02B9/62

CPC classification number: G02B23/243 ,  A61B1/00188 ,  A61B1/04 ,  G02B5/005 ,  G02B9/62 ,  G02B13/04 ,  G02B21/02 ,  G02B23/2407 ,  G02B23/2423 ,  G02B23/2484 ,  G02B27/0025 ,  G02B27/0081

Abstract: An object of the present invention is to reduce the diameter, to make focus adjustment easy, and to achieve bright, wide-angle, high-resolution image quality.Provided is an endoscope objective optical system including, in this order from the object side, a front group having negative refractive power, an aperture stop, and a positive rear group. The front group includes, in this order from the object side, a first lens, which is a single lens having negative refractive power, and a second lens, which is a single lens having positive refractive power. The rear group includes a third lens, which is a single lens having positive refractive power, a cemented lens formed of a fourth lens having positive refractive power and a fifth lens having negative refractive power, and a sixth lens having positive refractive power. The object-side surface of the first lens is a flat surface, the second lens has as meniscus shape, and the sixth lens is joined to the image-acquisition element, and the endoscope objective optical system satisfies the following conditional expression: 4

Abstract translation: 其中Fno是内窥镜物镜光学系统的有效F数，F6是第六透镜的焦距，F1_5是第一至第五透镜的合成焦距。