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AssigneeNIL Technology ApS
InventorNiklas Hansson
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The present disclosure describes diffractive optical elements (DOEs) and master tools for producing the DOEs. In one aspect, the disclosure describes a method that includes modifying a first pixel layout design for diffractive optical elements to obtain a modified pixel layout design. The first pixel layout design comprises pixels, each of which has a shape of a regular polygon (e.g., a rectangular shape). Modifying the first pixel layout design includes approximating a shape contour of a cluster of pixels in the first pixel layout design by a single polygon that reduces a total number of edges relative to the shape contour of the cluster of pixels in the first pixel layout design. The method also includes using the modified pixel layout design to form a master tool for production of the diffractive optical elements.
A method comprising:
A master tool for manufacturing diffractive optical elements, the master tool comprising:
A diffractive optical element comprising a multi-level structured surface, at least a portion of which has a contour having straight lines, each of which has a length larger than a pixel size in the optical element, wherein the pixel size is a center-to-center distance between two adjacent pixels having a common center, and wherein the straight lines change direction at least once at an angle θ, where 2°<θ<88° or 92°<θ<178°.
Dependencies are inferred from the claim text.