Polarizing beam splitter
US6926410B2 · kind B2 · utility
33Cited by
20References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2003 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Sep 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a unique polarizing beam splitter (PBS) that is suitable for use in projection systems and displays. The PBS contains at least one prism having at least one major surface and having a refractive index of at least about 1.6 and a birefringent film disposed on the major surface of the prism. The birefringent film is a multi-layer film having at layers of at least a first material and a second material. After uniaxial stretching, the film exhibits a refractive index difference of less than about 0.15 units in the stretched direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.