| 摘要 |
PURPOSE:To provide high C/N and to increase an erasing speed by applying the intensity of the electric field different from the electric field at the time of storing information to both terminals of two electrodes while heating a memory film or applying heating thereto the restore the amount film to the initial stable state in erasing of the information. CONSTITUTION:The inverted electric field is applied to the memory film at the time of erasing to transfer the film at a high speed to the state of the other optical constant which is stable by the projection of low-output laser light and heating. More specifically, the DC voltage is applied to the electrodes 2, 4 and the condensed laser light 5 is projected onto the memory film 3. The memory film 3 is transferred easily to the other stable state to exhibit the different reflectivity by the opto-thermo energy of the laser light 5 in addition to the excitation of the energy level by the electric field impression thus the erasing of information is executed. The reproduction of the information is attained by scanning the laser light on the memory film at the level lower than the quantity of the laser light at the time of storing and erasing the information and viewing the presence or absence of a change in the reflectivity of the memory film 3 to reproduce the information. The storage of the information is executed by condensing and projecting the laser light 4 onto the memory film 3 having the reflectivity in the erasing state and changing the same to the reflectivity state which is the memory state to end the storage. |
