Photopolymer formulation having different writing comonomers

摘要

The invention relates to a photopolymer formulation comprising matrix polymers, writing monomers, and photo initiators, comprising a combination of at least two different writing monomers. The invention further relates to the use of the photopolymer formulation for producing optical elements, in particular for producing holographic elements and images, to a method for producing the photopolymer formulation and to a method for illuminating holographic media made of the photopolymer formulation.

主权项

1. A photopolymer formulation comprising matrix polymers, a combination of at least two different writing monomers and photoinitiators, wherein the matrix polymers comprise polyurethanes, and wherein the at least two different writing monomers differ in their respective refractive indices nD20, measured at a wavelength of 405 nm, by not more than 0.200 and in each case have a refractive index nD20 of ≧1.45, measured at a wavelength of 405 nm, wherein the at least two different writing monomers comprise urethane acrylates and/or urethane methacrylates and wherein the photopolymer formulation further comprises plasticizers comprising fluorinated urethanes.