Optical scanning device, illumination device, projection apparatus and optical device
AssigneeDai Nippon Printing Co., Ltd.
InventorMakio Kurashige
Life of this patent
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Abstract
An illumination device includes a diffusion member having an anisotropic diffusion surface, a rotary shaft member configured to rotate the anisotropic diffusion surface while a coherent light beam from a light source is illuminated on the anisotropic diffusion surface, and an optical device that further diffuses a coherent light beam diffused on the anisotropic diffusion surface, wherein the coherent light beam diffused on the anisotropic diffusion surface is diffused in a form of line and the diffused coherent light beam in the form of line is configured to move to draw a locus of rotation in one direction in accordance with the rotation of the anisotropic diffusion surface.
Claims10
An optical scanning device comprising:
- a diffusion member having an anisotropic diffusion surface;
- and
- a rotary shaft member configured to rotate the anisotropic diffusion surface while a coherent light beam from a light source is illuminated on the anisotropic diffusion surface;
- wherein the coherent light beam illuminated on the anisotropic diffusion surface is linearly diffused from the anisotropic diffusion surface and the coherent light beam linearly diffused is configured to move so as to draw a locus of a line beam rotating on a specific plane, in accordance with the rotation of the anisotropic diffusion surface, and
- wherein the rotary shaft member is configured to rotate the anisotropic diffusion surface with an eccentric movement.
An illumination device comprising:
- a diffusion member having an anisotropic diffusion surface;
- a rotary shaft member that is configured to rotate the anisotropic diffusion surface while a coherent light beam from a light source is illuminated on the anisotropic diffusion surface;
- and
- an optical device that is configured to further diffuse a coherent light beam diffused on the anisotropic diffusion surface, the optical device including a lens array;
- wherein the coherent light beam diffused on the anisotropic diffusion surface is linearly diffused and the diffused coherent light beam is configured to move to draw a locus of rotation in one direction in accordance with the rotation of the anisotropic diffusion surface.
Dependencies are inferred from the claim text.