| 摘要 |
PURPOSE:To improve the recording density with use of an optical disk having a sealed structure excellent in the recording stability, by radiating the light to an organic compound to change the degree of orientation of the light irradiated area of said compound and recording the information. CONSTITUTION:A Cr film 2 serving as a laser light absorbing layer is vapor deposited to a polyethyrene film 1 which is optically active by itself with orientation of uniaxial stretching. Furthermore, the film 1 is fixed onto an annular substrate by adhesion, etc., as necessary for reinforcement of a disk. Then the laser light is radiated to a produced optical recording film via a photomagnetic recording head at the side of the film 1 so as to ensure a temperature higher than a glass transition point of polyethyrene and lower than a melting point of polyethyrene through control for recording a pit. Then, a reading task is carried out by laser and the recorded information can be read out because the orientation is lost at the part heated by irradiation of the laser light and the annular polarized reading light of said part is different from other parts. Thus, the recording density is improved with use of an optical disk which excels in the recording stability. |
