公开(公告)号：US11980339B2

公开(公告)日：2024-05-14

申请号：US17157781

申请日：2021-01-25

Applicant: OLYMPUS CORPORATION

Inventor： Yuki Nagata ,  Hiroyuki Nagamizu

IPC: A61B1/00 ,  A61B1/05 ,  A61B1/07 ,  G02B23/24

CPC classification number: A61B1/00096 ,  A61B1/05 ,  A61B1/07 ,  G02B23/2423

Abstract: An endoscope includes: an objective optical system including a lens, allowing light from an imaging subject to be incident on a distal end surface, and focusing the light onto an image-capturing surface of an image-capturing element; an elongated light guide provided adjacent to a side of the system and guiding illumination light to be emitted from a distal end; and an optically transparent distal end cover disposed at a position where the distal end of the guide is covered, wherein the distal end surface is located farther forward than the distal end of the guide, a notched portion is provided at a distal-end outer edge of a side surface of the system, the side surface being adjacent to the guide, so that the system is narrower toward a front side from the distal end of the guide, and the cover is provided so as to bulge toward the notched portion.