Variable color lighting instrument
US5073847A · kind A · utility
22Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Sep 6, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting instrument having pivotable dichroic filters arranged in a substantially radial arrangement with respect to a projected light beam. Multiple sets of such filters are spaced along the axis of the light beam to vary the color of the light beam emitted from the instrument. A gearing mechanism rotates all filters of each set in synchronization with each other and independently with respect to filters of the other sets. The filters may be positioned to pass unfiltered light to vary the saturation of the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.