초록 ▼

The present invention is concerned with photopolymer materials sensitive to infrared, near infrared, red and green light radiation for initiating polymerization and to applications of such photopolymer, like holographic polymer dispersed liquid crystal (H-PDLC) or reversible dye doped photopolymer (

The present invention is concerned with photopolymer materials sensitive to infrared, near infrared, red and green light radiation for initiating polymerization and to applications of such photopolymer, like holographic polymer dispersed liquid crystal (H-PDLC) or reversible dye doped photopolymer (RDDP) materials, for making optical devices. The invention relates to holographic polymer dispersed liquid crystal and reversible dye materials having improved electrical and optical switching properties.

대표청구항 ▼

1. 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 r

1. 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.