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AssigneeDai Nippon Printing Co., Ltd.
InventorsMakio Kurashige, Kazutoshi Ishida, Tomoe Takanokura, Yasuyuki Ooyagi
Estimating the term…
An illumination device includes an optical element including a hologram recording medium capable of diffusing a coherent light beam, the hologram recording medium comprising a plurality of regions, each region diffusing a coherent light beam to an illuminated region corresponding to that region, and an irradiation device configured to irradiate the optical element with the coherent light beam so as to allow the coherent light beam to scan the hologram recording medium. The coherent light beam incident to a position existing in each region of the hologram recording medium is diffused to an entire region of the illuminated region corresponding to the region in order to illuminate the entire region of the illuminated region.
An optical element comprising a hologram recording medium capable of diffusing a coherent light beam, the hologram recording medium comprising a plurality of hologram recording medium regions, each hologram recording medium region diffusing a coherent light beam irradiated from an irradiation device to an illuminated region corresponding to the hologram recording medium region,
An optical element comprising a plurality of light diffusion elements, each light diffusion element capable of changing a propagation direction of an incident light beam, each light diffusion element diffusing a coherent light beam irradiated from an irradiation device to an illuminated region corresponding to the light diffusion element,
Dependencies are inferred from the claim text.