Dynamically controlled mirror for reduction of projected image distortion
US4773748A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1984 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Oct 9, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A deformable mirror system for reduction of projected image distortion in an optical system is disclosed. The mirror is adapted to correct for ray direction. In accordance with the invention, a mirror is located near an intermediate image plane. The distortion in the image is predetermined, and the mirror is contorted in a manner determined by the distortion to be corrected; relationships are prescribed for the desired contortion. Significant reduction in distortion can be achieved by placement of a mirror near the image plane; furthere reduction can be achieved in accordance with the invention by the placement of an additional contorted mirror at a subsequent image-forming aperture in the optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.