A HOLOGRAPHIC METHOD AND PRODUCT

摘要

We propose a method of detecting the presence of certain chemical and biochemical substances by virtue of the fact that they are, or have attached to them, either a dye molecule which acts as a photosensitizer for a holographic recording or erasing process, or another essential molecular component of the holographic recording material such as a monomer or a free radical generator. The recording or erasing process utilizes a photopolymer system consisting of a monomer and a crosslinking monomer, a free radical generator, a photosensitizer and, additionally, a polymeric binder when dry formulat ions are required. Applications are broad ranging. Examples in diagnostics, printing, securit y, and environmental monitoring are given.