Endoscope using an optical guide twisted on the tip side to have the visual field direction and curvature axis coincide with each other
US4941457A · kind A · utility
60Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Aug 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/26
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
As inserted through an insertable part, a flexible image guide transmitting an optical image and a flexible light guide transmitting an illuminating light are secured in a tip part so as to be parallel/vertical to a curvature axis and are inserted in a position displaced rotatably around the center axis within a curvable tube part adjacent to this tip part so that, in case a tip adapter is fitted, the visual field direction and the direction of the curvature axis may be parallel/vertical to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.