Illumination system
US6341876B1 · kind B1 · utility
128Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1999 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Oct 21, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/1033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system for illuminating a spatial light modulator. An integrator rod is positioned in the light path between an arc lamp and the spatial light modulator. At the input surface of the integrated rod, there is positioned a field lens for defocusing areas of turbulence within the arc lamp. In the output surface of the integrated rod there is positioned a plate effective to prevent dust from being attracted to the output surface of the integrator rod. The integrator rod is effective to combine light from two separate light sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.