| 摘要 |
PURPOSE:To allow the reproduction by a CD reproducing device by rendering absorption at 780nm wavelength in a colored state to a photochromic material and forming a reflecting film on a recording film. CONSTITUTION:The photochromic material has the absorption at 780nm wavelength in the colored state and is constituted by forming the reflecting film 12 on the recording film 11. Since the initialization region of the recording film 11 is in the colorless state if the recording film is irradiated with visible light at the time of reproduction of information the strong reflected light is obtd. and the information recording part is in a colored state, therefore, the reflected light is weakened by the light absorption. The information is reproduced as the varying intensities of the reflected light in this way and since the recording film 11 has the absorption at 780nm wavelength in the colored state, the information is reproduced even with the CD reproducing device. |
