Patent ID: 8462325
Filing Date: 2013-06-11
Classification: G01J,G01S,H01L

Abstract:
1. A light directionality sensor, comprising: a photo-sensor comprising a plurality of photo-sensitive elements, each of which is for sensing a light intensity; and a plurality of light-absorbing light selecting structures arranged on said photo-sensor so as to form an array of light-absorbing light selecting structures, wherein a succession of at least some of the light-absorbing light selecting structures has varying structural characteristics by each individual structure of the succession being arranged such that it allows light within a different angle interval with respect to the array to be sensed, wherein the structural characteristics is selected from the group consisting of the spacing between light-absorbing light selecting structures, the height of a light-absorbing light selecting structure, and the geometrical shape of a light-absorbing light selecting structure.