Compact fast catadioptric imager
US7224520B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2004 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Apr 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact, optically fast catadioptric imager. In one embodiment, the catadioptric imager of this invention includes a first group of optical elements optically disposed to receive electromagnetic radiation from an object and having positive optical power, a second group of optical elements, optically disposed between the first group of optical elements and an image plane, having at least one optical surface and having positive optical power, a third group of optical elements, optically disposed between the object and the second group of optical elements, having at least one optical surface and having negative optical power, a fourth group of optical elements substantially centered along an optical axis of said second group of optical elements and having negative optical power, and a fifth group of optical elements having positive optical power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.