Optical projecting system
US7724311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2006 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Mar 25, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical projecting system includes a light-splitting unit for splitting composite source light into a plurality of composite light beam components, and a reflective color wheel rotatable about a rotation axis and including a plurality of multi-layer light-reflecting sections for further splitting each of the composite light beam components into a plurality of colored light beam components for subsequent modulation and projection. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along the rotation axis, and each being capable of reflecting light within a predefined distinct wavelength range, and permitting transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.