Reflecting optical system
US4688904A · kind A · utility
19Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1984 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Oct 19, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70308
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reflecting optical system including a concave mirror and a convex mirror having opposing reflecting surfaces and disposed coaxially with each other. The reflecting optical system is provided with aspherical lens portions disposed between an object field and the concave mirror and between the concave mirror and an image field, respectively, to achieve a wider superior imaging region of arcuate shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.