Patent ID: 8974069
Filing Date: 2015-03-10
Classification: G02B,G02F,G09F

Abstract:
1. A diffuser that is configured to diffuse radiation from a plurality of light sources having predetermined spacing therebetween, the diffuser comprising: a substrate having first and second opposing faces; and an array of microstructures on the first face, the microstructures in the array including at least one feature that varies as a function of the predetermined spacing between the plurality of light sources; wherein the array of microstructures comprises an array of repeating unit cells of microstructures, the microstructures in a respective repeating unit cell being defined by the at least one feature that varies as a function of the predetermined spacing between the plurality of light sources; and wherein the unit cells progressively change as a function of relative position on the substrate, in addition to varying as a function of the predetermined spacing between the plurality of light sources.