Endoscope
US6773392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Feb 28, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/00096
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endoscope includes a first lens barrel having a brazing surface in at least a brazing portion thereof, and supporting an optical window member brazed thereon, and a second lens barrel arranged to be proximal with respect to the optical window member and supporting optical members on the inner circumference thereof. At least a distal end surface of one of the second lens barrel, a diaphragm member, a spacer ring, and the optical members has light reflectance lower than that of the brazing surface of the first lens barrel. At least the inner circumference of the second lens barrel has a light reflectance lower than that of the brazing surface of the first lens barrel or has a reflection surface more irregular than the brazing surface of the first lens barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.