Patent ID: 6939014

Claim:
A light filter comprising: a first layer of substantially opaque material including front and back surfaces; a plurality of light transmissive beads disposed in a single-layer array within the first layer of opaque material with first portions of the beads penetrating through the front surface of the first layer of opaque material to form light transmissive apertures and remaining portions of the beads protruding through the back surface of and not disposed within the first layer of substantially opaque material to receive incident light; and a second layer of light-dispersing material having asymmetrical dispersion characteristics along orthogonal axes, the second layer being interposed between incident light and the remaining portion of the beads protruding through the back surface of and not disposed within the first layer of substantially opaque material to disperse light incident on the second layer to enhance light transmission along one of the orthogonal axes relative to light transmission along another of the orthogonal axes, the second layer including within a material for scattering incident light.