Methods and laser systems for reduction of undesired speckle
US10663748B2 · kind B2 · utility
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3References
20Claims
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Key dates
| Filing date | Nov 22, 2016 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Nov 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for using a laser, including using a coherent light source to generate a beam having a dominant wavelength wl; and providing along the beam's light path, at least one optical element having a surface upon which the beam impinges, whose roughness is between D and ½ wl−D where D is double the tolerance of the laser's dominant wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.