Arrangement for spot illumination
US9169997B2 · kind B2 · utility
15Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2011 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Sep 5, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided an arrangement for spot illumination (14). The arrangement provides an improved collimation and color mixing unit comprising a LED array (1), a convex shaped reflector (15a), a field lens (21) and an additional cylindrical reflector (15b) at the exit aperture of the system. In combination with an optical projection system which may comprise at least two additional zoom lenses and a gate (in which several maskers, gobos or shutters could be inserted) the system allows color mixing in an extended operational range including out of focus zoom settings often used to get soft edge spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.