MATERIAL AND METHOD FOR WAVELENGTH SELECTIVE OPTICAL STORAGE

摘要

PURPOSE:To increase the multiplicity of wavelength by changing the light absorption wavelength range of an optical storage material by an addition or elimination reaction caused by the projection of light at an extremely low temp. CONSTITUTION:The light absorption wavelength range of an optical storage material is changed by an addition or elimination reaction caused by the projection of light at an extremely low temp. Since a conjugated system is broken or formed by the optical addition or elimination, the change of the absorption wavelength range is large and the range shifts to the shorter wavelength side by about 300nm. In case of a proton shift type compound, the absorption wavelength range shifts only by 10nm and overlaps that of an absorptive body before optical isomerization. The absorption wavelength ranges of the optical storage material before and after the reaction do not overlap each other, so multiple balls can be formed in the absorption zone and the multiplicity of wavelength is increased.