Raman despeckling with spectral control
US10663747B2 · kind B2 · utility
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2References
18Claims
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Assignee
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Key dates
| Filing date | Nov 21, 2016 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | May 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/363
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for controlling the spectrum of stimulated Raman scattering that is used for despeckling of digitally projected images. The stimulated Raman scattering is utilized to add wavelength diversity for reduced speckle and to change the color of the light to a more desirable combination of wavelengths. Digital projection with color-sequential projectors may be enabled by alternately switching the Raman spectrum between green and red. Improved projector transmission may be achieved by minimizing the amount of yellow light generated in the Raman spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.