Re-imaging optical system
US5546228A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Feb 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B25/001
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A re-imaging objective optical system provides superior optical performance while having a short overall length and a relatively simple composition. The system has, in order from the object side of the optical system, a front lens group (G1) composed of a first lens group having a positive lens component (L1), a second lens group having a biconcave negative lens component (L2) and a third lens group having a positive lens component (L3); and a back lens group G2 composed of a cemented double lens element with components (L4 and L5) and a positive lens component (L6). The spatial or primary image I.sub.1 from the objective optical system is formed on the optical path between the first lens group and the second lens group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.