Illumination device
AssigneeSeeReal Technologies S.A.
InventorGerald Futterer
Life of this patent
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Abstract
An illumination device for illuminating a spatial light modulator device. Sub-holograms are used for encoding a hologram into the spatial light modulator device. The Illumination device includes at least one light source for emitting light for illuminating the spatial light modulator device and a beam shaping unit. The beam shaping unit provides a flat-top plateau-type distribution of an absolute value of a complex degree of mutual coherence of the light in a plane of the spatial light modulator device to be illuminated. The flat-top plateau-type distribution of the absolute value of the complex degree of mutual coherence has a shape that is at least similar to a shape of the largest sub-hologram used for encoding of object points into the spatial light modulator device.
Claims23
An illumination device for illuminating a spatial light modulator device, comprising a light source device and at least one scatter element, where
- the light source device comprises at least one multi-mode fiber or mono-mode fiber and is configured to emit light for illuminating the spatial light modulator device, and
- an exit plane of the at least one multi-mode fiber or mono-mode fiber is imaged onto the at least one scatter element to generate only one extended light source, where in a plane of the spatial light modulator device a defined coherence of the light is provided by a size of the extended light source, the size of the extended light source is adapted by the magnification of an image of the exit plane of the at least one optical fiber.
Dependencies are inferred from the claim text.