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Method for designing optical directional conversion surface of corstick layer, optical security element having optical directional conversion surface of designed corrugated layer, object with mark, and application and method for authenticating object
Method for designing optical directional conversion surface of corstick layer, optical security element having optical directional conversion surface of designed corrugated layer, object with mark, and application and method for authenticating object
The present invention relates toCorsage layerRefractive transparent or partially transparent light directionally converted surfaceOr a method of designing a reflective optical directional conversion surface;Providing a discrete representation of the input target image;Calculating the generalized power diagram for the set of image pixels Pi of the target image;Based on the calculated optimal set of weights to minimize the cost function associated with the set of image pixels piThe present invention relates to a method of including a step of calculating a piecewise light directional conversion surface of a corstick layer.The present invention also relates to an optical security element, an object with a mark, a method of visually authenticating an object, and the use of an optical security element for protecting or counterfeiting.Diagram
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