Patent ID: 7719777
Filing Date: 2010-05-18
Classification: G02C

Abstract:
1. A uniform diffuse omni-directional reflecting lens comprising: a first light transmitting lens element having first and second surfaces, said first surface having a major optical area, said first surface within said major optical area comprising a diffuse reflecting form texture, said diffuse reflecting form texture having a surface finish, said surface finish comprising a random and continuous series of peaks and valleys, said peaks and valleys having a slope angle (Rdq) greater than 0.75 degrees and less than 6.5 degrees, an amplitude (Rq) greater than 5.9 micro-inches and less than 25.0 micro-inches, and a peak density (RSm) greater than 0.0009 inches and less than 0.007 inches; a reflective medium applied to at least a portion of said diffuse reflecting form texture, said reflective medium being sufficiently thin to reflect only a fraction of the light impinging thereon, the remainder of the impinging light passing through said reflective medium, said reflective medium applied to said diffuse reflecting form texture representing a prepared first surface of said first light transmitting lens element; a light transmitting adhesive layer applied to said prepared first surface, said light transmitting adhesive layer having fifth and sixth surfaces, said fifth surface of said light transmitting adhesive layer conforming to said prepared first surface of said first light transmitting lens element; and a second light transmitting lens element having third and fourth surfaces, said fourth surface of said second light transmitting lens element being in contact with said sixth surface of said light transmitting adhesive layer; said second surface of said first light transmitting lens element and said third surface of said second light transmitting lens element forming outer surfaces of said diffuse reflecting lens.