Moving aperture device for reducing scattered light in an optical system
US4634854A · kind A · utility
5Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jan 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to reduce the amount of internally scattered radiant energy in an optical system having a collecting optical chamber and a secondary optical chamber, a moving aperture device is positioned in a first focal plane between the chambers; the aperture device has a continuous moving metal band that has staggered slits therein. The band is sprocket driven and cryogenically cooled to reduce thermal emission. The band can be synchronized with other scanning detectors in the optical system such as one might find in an infrared telescope used in outer space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.