US Patent:
20130329184, Dec 12, 2013
Inventors:
Adam Ahmad Barzak - Anaheim CA, US
Andrew John McKenzie - Long Beach CA, US
David Mark Ambler - Rancho Palos Verdes CA, US
International Classification:
G02C 7/10
G02B 1/08
G02C 7/12
US Classification:
35115956, 35115964, 35115961, 264 132
Abstract:
The present invention describes ophthalmic lens products comprising a multilayer wafer and an injection-molded polycarbonate inner portion. The multilayer wafer includes a dyed, photochromic or polarized layer between a tinted inner layer and an outer polymeric layer. The inner layer may be solid or gradient-tinted. The polycarbonate inner portion of the lens product is directly fused to the tinted inner layer of the multilayer wafer during injection molding. The invention further describes a method to produce a gradient-tinted polarized polycarbonate eyewear lens product by obtaining a multilayer wafer having an outer layer, an inner polycarbonate layer, and a polarized layer between the inner and outer layers, applying a gradient tint to the wafer's inner layer, placing the gradient tinted wafer within an injection-molding cavity, and injecting molten polycarbonate directly against the wafer's gradient-tinted layer to form the inner portion of the lens product and to fuse it to the wafer.