Diffuser having shape profile for reducing speckle noise and a laser projection system employing the same
US8240855B2 · kind B2 · utility
1Cited by
9References
18Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 20, 2007 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/0006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diffuser having a shape for reducing speckle noise and a laser projection system including the diffuser are provided. The diffuser is employed by a laser projection system to reduce speckle noise, and includes a scattering pattern. The scattering pattern includes a plurality of scattering ribbons, and a curved surface of each of the plurality of scattering ribbons satisfies equations so that speckle noise is minimized for an aperture size of an optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.