Patent ID: 8177408
Filing Date: 2012-05-15
Classification: F21V,G02B

Abstract:
1. An optical element comprising: a) an input surface; b) an output surface; c) A light transmitting layer having disposed within a pattern of first light transmitting regions and first light blocking regions; wherein the light blocking region is a light reflecting region and the diffuse reflectance of the light reflecting region, DR, is greater than 70% as calculated by  where DRT is the total diffuse reflectance of the light transmitting layer measured in the d/8 geometry with the specular component included and ART is the percentage area ratio of the total of the first light blocking regions and first light transmitting regions that is occupied by the first light transmitting region; d) a light redirecting layer containing a first group of lenticular elements formed in a light transmitting material with lenticular apexes and first optical axes; e) a first angle gamma, defined as the angle between two vectors extending from an apex of the first group of lenticular elements; f) wherein the optical path of light transmitted through the output surface proceeds in sequence from the input surface through the first light transmissive layer through the light redirecting layer and;