| 摘要 |
PURPOSE:To carry out reversible writing, by irradiating a polarizable polymer sheet polarized by polarizing operation with laser light. CONSTITUTION:A polarizable polymer film 1 of a vinyl halide polymer, a vinyl cyanide polymer or polyacrylonitrile on a metallic reflection film 2 is polarized by applying an electric field. When the polarized polymer film is irradiated with laser light, the polarization of the irradiated part is relaxed, so the reflectance, refractive index and double refractive index are changed to enable writing. In case of reproduction, the film 1 is irradiated with polarized laser light, and the reflected light is detected with a photodetector to enable readout. The polarization is erased by applying an electric field in the reverse direction. Thus, a reversible information recording memory is obtd. |
