F-.theta. lens system
US4436383A · kind A · utility
10Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1982 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Sep 2, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An F-.theta. lens system comprising a first lens group consisting of a first positive meniscus lens component and a second negative lens component, and a second lens group consisting of a third positive lens component and a fourth positive lens component, said lens system comprising a small number of lens elements, a small F number and a large field angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.