Polarization arrangement
US6764181B2 · kind B2 · utility
22Cited by
12References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | May 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133528
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tilted polarization splitter (13) for use with a projection lens (15) and a light modulating panel (11) is provided. The polarization splitter has an ultra thin substrate (14) whose thickness is chosen so that the depth of focus of the projection lens in imager space is greater than the astigmatism produced by the splitter at its tilted angle. The polarization splitter can be a wire grid polarizer, polarization coating, or birefringence film carried by or formed on the ultra thin, plane parallel plate substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.