| 摘要 |
PURPOSE:To allow the recording of the information based on a change in the refractive index of a recording layer without increasing the film thickness of the recording layer by combining a liquid crystal layer with a photochromic layer. CONSTITUTION:A transparent substrate 1 is subjected to fine deformation by a rubbing method, etc., on the surface on which a translucent reflecting film 2 is formed. This recording medium has the photochromic layer 3 disposed thereon, the liquid crystal layer 4 disposed on this photochromic layer 4, and a reflecting layer 5 disposed on this liquid crystal layer 4. Namely, the orientation state of the liquid crystal in the liquid crystal layer 4 is varied by a difference in the structure of the photochromic layer 3 and the refractive index of the liquid crystal layer 4 is relatively largely changed according to the orientation state of the liquid crystal by disposing the liquid crystal layer 4 on the photochromic layer 3. The apparent refractive index of the recording part is largely changed in this way as compared with the unrecorded part according to the change in the refractive index of the liquid crystal layer 4. |
