Imaging system with mirror group
US7712905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2005 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Oct 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70341
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An imaging system for imaging an off-axis object field arranged in an object surface of the imaging system onto an off-axis image field arranged in an image surface of the imaging system while creating at least one intermediate image has: an optical axis; an in-line mirror group having an object side mirror group entry, an image side mirror group exit and a mirror group plane aligned transversely to the optical axis and arranged geometrically between the mirror group entry and the mirror group exit, the mirror group including: a first mirror having a first mirror surface for receiving radiation coming from the object surface in a first reflecting area asymmetric to the optical axis; at least one second mirror having a second mirror surface facing the first mirror surface for receiving radiation coming from the first mirror in a second reflecting area asymmetric to the optical axis; at least one of the first and second mirrors being a concave mirror having a concave mirror surface defining a mirror axis on the optical axis; wherein the mirrors of the mirror group are arranged such that radiation coming from the mirror group entry passes at least four times through the mirror group p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.