Optical System Manufacture

Abstract: Optical System Manufacture A method of manufacturing an optically transmissive sheet is described. The method comprises moulding the optically transmissive sheet as a laminate, wherein the optically transmissive sheet is adapted for total internal reflection at first and second faces of the optically transmissive sheet. The method further comprises forming one or more light absorbing layer regions on either the first face, the second face, or both of the optically transmissive sheet, wherein the one or more light absorbing layer regions are formed in the moulding process. Methods of manufacturing an optical element for a touch screen apparatus, and of manufacturing a touch screen apparatus, are also described, as are optically transmissive sheets, optical elements for a touch screen apparatus, and touch screen apparatus.

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