| 摘要 |
PURPOSE:To attain high-density recording by forming optical isotropy to a recording medium in the reading direction, applying an electric field to the recording part in a direction with a tile angle in the read direction, irradiating the light for heating the medium thereby decreasing a recording unit area. CONSTITUTION:An organic amorphous compound is used as the recording medium, where an anisotropy is caused in the refractive index by applying an electric field to orient a dipole and the orientation relax temperature of the radial causing the dipole is >=40 deg.C. In recording, electrodes 2a, 2b are provided in a direction having a tile angle theta to the read direction L of the recording medium L, an electric field is applied to a direction with a tilt in the reading direction and a ray T is irradiated. In reading the recording, orthogonal polarizers 3a, 3b are placed at both sides of the recording medium 1, and the ray L is received by an analyzer 4 through the polarizer 3a, the recording medium and the polarizer 3b. In erasing the recording, the entire recording medium 1 is heated to the orientation relax temperature of the polar radical or the orientation is relaxed by irradiating the light on the erased part only. |
