Patent ID: 6896757
Filing Date: 2005-05-24
Classification: G02B,G03B,Y10S,Y10T

Abstract:
1. A method of preparing a light transmitting filter comprising the steps of: (1) providing a first assembly comprising a light absorbing layer having a front surface and a back surface wherein the front surface is adhered to a substrate, and a monolayer of transparent microspheres embedded in the light absorbing layer; wherein the microspheres provide light tunnels through the light absorbing layer and protrude from the back surface of the light absorbing layer (2) providing a second assembly comprising an optically clear conformable layer comprising a front surface and a back surface, said back surface having a textured finish, a molding layer having a front surface and a back surface wherein the front surface of the molding layer has a textured finish and is in contact with the back surface of the conformable layer, and the back surface of the molding layer is in adherent contact with a substrate; (3) laminating the back surface of the microsphere containing layer of the first assembly to the front surface of the optically clear conformable layer of the second assembly; (4) removing the molding layer and substrate whereby the conformed layer remains on the microspheres, and the back surface of conformed layer has a textured finish.