Inverted telephoto type wide angle lens system
US4203653A · kind A · utility
13Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1978 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Jun 23, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An inverted telephoto type wide angle lens system comprises, in order from the object side, a negative meniscus lens having its convex surface facing the object side, a first positive lens, a negative lens, a second positive lens and a third positive lens. The lens system satisfies certain conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.