| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated optical disk which enables display for discriminating recorded contents readable with bare eyes without shielding reading laser beams and a disk by printing or the like. <P>SOLUTION: Information bases 21a and 21b to be laminated are provided with information surfaces 22a and 22b with information recorded thereon and reflection films 23a and 23b for reflecting reading laser beams, a protective film layer 24 for protecting a reflection surface of the reflection film 23a is provided at the information base 21a side, and a display layer 25 by printing for discriminating recorded contents and a disk is provided on the protective film layer 24. Although in the reflection film 23b of the information base 21b, reading laser beam wavelength reflects light quantity sufficient for reading, a thin metal film (thin silver film) such as allowing light sufficient to recognize display on a display layer 25 with bare eyes to transmit is used for light of a wavelength region which is shorter than the reading laser beam wavelength and can be observed with bare eyes. <P>COPYRIGHT: (C)2007,JPO&INPIT |
