Photographic lens system
US4645312A · kind A · utility
2Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1983 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Nov 17, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B9/62
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic lens system having a field angle of 70.degree. or wider and designed for use with compact cameras having a relative aperture of F/3.5 comprising a first positive meniscus lens component having a convex surface on the object side, a second positive meniscus lens component having a convex surface on the object side, a third negative meniscus lens component having a convex surface on the object side, a fourth lens component having positive refractive power, and a fifth lens component comprising a negative lens element and having positive refractive power as a whole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.