Patent ID: 6027672
Filing Date: 2000-02-22
Classification: B29B,B29C,B29D,B29K,G02B

Abstract:
A process for forming a blank comprising a plurality of polymer layers, each having a different index of refraction, said blank having a prescribed axial profile of index of refraction that varies continuously from a first surface to a second, opposite surface, said process comprising:(a) depositing a layer of a monomer having a first index of refraction on a substrate using a deposition head which is positionable over and movable relative to said substrate and surrounding said substrate with a controlled gaseous environment;(b) partially polymerizing said layer of monomer to at least a semi-solid state;(c) depositing another layer of monomer having an index of refraction that is different than the previous layer of monomer; and(d) repeating steps (b) through (c) until a prescribed number of layers of monomer, each layer having a different index of refraction, have been deposited, thereby forming said blank.