Optical arrangement for high-powered diaprojectors
US5053934A · kind A · utility
20Cited by
6References
14Claims
0Family size
Inventor
Key dates
| Filing date | Feb 9, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Feb 9, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical arrangement for high-powered projectors has a metal vapor lamp integrated into an ellipsoidal mirror, and an additional mechanical light valve for the continuous control of brightness of the stream of light, and is especially for use in multi-, super-shuttered and large projectors. The compact structure offers high optical efficiency and, at the same time, slight technical expense. The use of this technology makes possible the production of high-powered diaprojectors with small dimensions and light weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.