| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk capable of recording visible images of excellent visibility on an image recording layer in the optical disk provided with the image recording layer capable of recording the visible images by using a laser beam. <P>SOLUTION: The optical disk is provided with the image recording layer capable of recording the visible images by irradiation with a laser beam on a substrate in the order. When measuring reflectivity from the substrate side, the integrated value A of the reflectivity in the area of a wavelength 500 to 600 nm of the image recording layer before recording the visible images on the image recording layer and the integrated value B of the reflectivity in the area of the wavelength 500 to 600 nm of the image recording layer after recording the visible images satisfy the relation of an expression (M1):A<B. <P>COPYRIGHT: (C)2007,JPO&INPIT |
