Illuminating device with polarization recycling in a double prism
US8248695B2 · kind B2 · utility
1Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2004 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3058
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illuminating device is described comprising an optical source emitting an unpolarized light beam, a polarizing beam splitter comprising a grid polarizer situated between the faces of two prisms. The light beam penetrates into the first prism through a face and reaches the polarizing beam splitter that transmits the light having a first polarization direction to the face that reflects it toward an exit face. In addition, the splitter reflects the light having a second polarization direction to the face that reflects it toward an exit face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.