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AssigneeSharp Kabushiki Kaisha
InventorsGraham John Woodgate, Duncan James Anderson, Jason Slack, Marina Vladimirovna Khazova
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An optical device which is suitable for use in a projection display comprises a spatial light modulator, such as a liquid crystal device, with a microlens array disposed on its front surface. The microlenses are of convergent type, such as lenticules. The spatial light modulator is of the reflective type and comprises a plurality of rear reflectors, each of which has convergent optical power in at least one direction. The reflectors are arranged such that, for a given direction of illumination, each reflector forms an image of the aperture A of a microlens on the aperture B of another microlens or at a different position on the same microlens. When used in, for example, a projection display, light losses caused by vignetting are reduced.
An optical device comprising an array of convergent microlenses disposed in front of a reflective spatial light modulator comprising a plurality of rear reflectors, characterised in that each of the rear reflectors has convergent optical power.
Dependencies are inferred from the claim text.