Patent ID: 7144528

Claim:
A method of casting an optical device within a mold assembly, said assembly comprised of first and second mold portions, said first mold portion having first and second opposing surfaces, said first surface having fresnol geometry and said second surface comprising an optical device-forming surface, said second mold portion having first and second opposing surfaces, said first surface comprising an optical device-forming surface, said method comprising the steps of: a) charging said first surface of said second mold portion with a polymerizable material; b) assembling said first and second mold portions such that said polymezitable material is sandwiched between said optical device-forming surface of said first mold portion and said first surface of said second mold portion; and c) irradiating said mold assembly such that said radiation path passes through said fresnel geometry of said first mold portion; whereby said polymerizable material is cured to form an optical device.