Objective for an endoscope
US4755029A · kind A · utility
58Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | May 19, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2446
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An objective for an endoscope comprising a GRIN lens whose surface on the object side is arranged as a planar surface or convex surface and whose surface on the image side is arranged as a convex surface, the objective for an endoscope having an extremely small outer diameter and a wide field angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.