| 摘要 |
PURPOSE:To enable readout of an optical charge in a thin film for optical recording when irradiated with visible light and to enable simple erasure of the recording by heating by laminating of depositing by evaporation tungsten trioxide and silver on a substrate or laminating silver on an oxide film contg. tungsten trioxide. CONSTITUTION:Tungsten trioxide is vacuum-deposited by using a heating boat formed of tungsten on a quartz glass substrate and in sucession, silver is deposited by evaporation thereon to obtain a thin film for optical recording. After the resultant thin film for optical recording is heated, white light is irradiated thereto and the spectral transmission characteristic of the film after the heating and the spectral transmission characteristic of the film after the irradiation of the light are inverstigated, the spectral curve A of the film after the heating and the spectral curve B after the irradiation of light are obtd. The transmissivity of the film decreases by about 5% at about 450-650nm and by about 5% at 850-1,300nm when irradiated with light as is evident from the curve. When the film after the irradiation of light is reheated, the transmissivity is reset almost to the spectral curve before the irradiation of light and the optical recording is made possible again. |
