| abstract |
PURPOSE:A novel optical memory material in a thin film state capable of preventing memory vanishing by readout, by dissolving and dispersing a photochromic substance into a solid substance containing a cholesteric liquid crystal phase. CONSTITUTION:A photochromic compound (e.g., azobenzene, fulgide, norbornadiene, etc.) reversely undergoing molecular structure change by light rays with different wavelength is dissolved and dispersed into a solid substance [e.g., poly(L-glutamic acid-gamma-benzyl), etc.] having cholesteric liquid crystal phase in a weight ratio of preferably 1:0.05-1:0.2 to give the aimed optical memory. |