Method of varying luminous intensity of light in an illumination system
US5658070A · kind A · utility
4Cited by
18References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1994 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/205
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fiberoptic illumination system having an attenuator with a "multiple wedge" aperture that more uniformly attenuates the light beam striking the fiberoptic without changing the color temperature of the light beam or affecting the exit divergence angle of the light beam. The system includes an optical housing design having orthogonal lights paths that allows two fiberoptics to be illuminated from the same bulb, two bulbs located in primary and back-up positions, respectively, mounted on a rotating carousel and a retinal protection filter that filters out wavelengths of light harmful to the retina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.