Endoscope and insertion portion thereof
US11980339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2021 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Jun 9, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2423
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.