Complex diffraction device
AssigneeNippon Mitsubishi Oil Corporation
InventorsYasushi Satoh, Yoshihiro Kumagai, Takehiro Toyooka
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Abstract
A complex diffraction device, which is excellent in designability, easy in setting the diffraction angle, adaptable to size increase, and easy to handle by adding a diffraction function resulting from an uneven pattern to the diffraction device comprising a liquid crystalline layer where the helical orientation of the smectic liquid crystal phase having a helical structure is maintained.
Claims8
A complex diffraction device wherein a diffraction function resulting from a pattern of periodic grooves formed on a liquid crystal layer surface is added to a diffraction device comprising a thin film liquid crystal layer where a helical orientation of a smectic liquid crystalline phase having a helical structure is maintained and helical axes of the liquid crystal layer are in a direction parallel to a cross section of the liquid crystal layer surface, and wherein the liquid crystal layer exhibits diffractivity originating from the helical structure.
A complex diffraction device wherein a diffraction function resulting from a pattern of periodic grooves is added to one or both surfaces of a diffraction device comprising a thin film liquid crystal layer where a helical orientation of a smectic liquid crystalline phase having a helical structure is maintained and helical axes of the liquid crystal layer are in a direction parallel to a cross section of the liquid crystal layer surface, and wherein the liquid crystal layer exhibits diffractivity originating from the helical structure.
A method of producing a complex diffraction device comprising preparing a thin film liquid crystal layer having a helical structure of a smectic liquid crystalline phase from a liquid crystalline material exhibiting a smectic liquid crystalline phase with a helical structure wherein helical axes of the liquid crystal layer are in it direction parallel to a cross section of a liquid crystal layer surface and the liquid crystal layer exhibits diffractivity originating from the helical structure, and subjecting the surface of the liquid crystal layer to an embossing processing to provide a diffraction function resulting from a pattern of periodic grooves.
Dependencies are inferred from the claim text.