Patent ID: 6398981
Filing Date: 2002-06-04
Classification: C09K,G02B,G03H

Abstract:
A photopolymerizable composition sensitive to light in a green to infrared region of the optical spectrum, comprising:a photopolymerizable monomer or oligomer, or a mixture thereof, capable of forming a polymer having predetermined optical properties; a photoinitiator sensitive to light in said region, said photoinitiator comprising a dye sensitizer and an initiator, wherein said dye sensitizer is a cyanine dye having a perchlorate anion and said initiator is an electron donor; an additive for increasing refractive index and decreasing viscosity of the composition; and a filler having optical properties selected to contrast with the optical properties of the polymer, said filler being selected from the group consisting of liquid crystals, photochromic reversible dyes and mixtures thereof.