Endoscope objective lens system
US7379252B2 · kind B2 · utility
67Cited by
9References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2006 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Dec 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An endoscope objective lens system includes a negative front lens group, a diaphragm, and a positive rear lens group, in this order from the object. The negative front lens group includes one lens element, or a plurality of non-cemented lens elements; and the most object-side lens element is constituted by a negative lens element. The positive rear lens group includes a plurality of non-cemented lens elements; and at least one negative lens element is provided in the positive rear lens group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.