Reflection and refraction optical system
US4685777A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Dec 24, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An off-axis imaging optical system, includes: a first imaging optical system including a reflection optical element and a refraction optical element; a second imaging optical system including a reflection optical element and a refraction optical element, wherein the second imaging optical system is disposed with respect to the first imaging optical system so as to reimage an image formed by the first imaging optical system; wherein one of the first and second imaging optical system has unit magnification or enlarging magnification imaging power, and the other imaging optical system has a reducing magnification imaging power, so as to provide a reducing magnification power as a whole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.