| 摘要 |
PURPOSE:To obtain an information memorizing device using light recording element high in reliability and capable of high density recording by forming an information recording element composed of a film made of a triphenylmethane deriv. having both of a hydrophilic group and a hydrophobic group and installing means for writing, reading, and erasing information on and from said element. CONSTITUTION:At the time of writing, a recording control circuit 27-2 is connected to a light modulator 26-2, a recording light 24-2 emitted from a recording light source 29-2 is modulated and controlled in accordance with input information, and this light signal is formed into an image displayed on the recording layer of the light recording element 18, and color is developed with a color developing mechanism, and recorded. At the time of reading, a reading light 24-1 emitted from a reading light source 29-1, different in wavelength from the recording light 24-2, is used for reading. The reflected light is converted into an electric signal by casting the light on the light receiving face of a photodiode 25 through a light pickup optical system to execute reproduction and reading of the light. A light 24-3 different in wavelength emitted from an erasing light source 29-3 is used for erasing. the element 18 utilizes the photoreaction of the triphenylmethane deriv. and is composed of colorless or colored layer of a monomolecular film or its built-up molecular films. |
