Efficient spatially modulated illumination system
US9134591B2 · kind B2 · utility
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8References
26Claims
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Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Jan 5, 2033 |
Classification
- Technology area (CPC —)General
Abstract
A projector can include a projection lens that is positioned substantially one focal length away from a spatial light modulator. The projector may also include a non-imaging optic configured to illuminate the spatial light modulator. The non-imaging optic may include a light emitter and an etendue-preserving reflector. The projector can be configured to project an image created by the spatial light modulator at a distance using light from the non-imaging optic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.