PURPOSE: To obtain a writable information recording medium with using an optical reproducing hologram by reproducing information from a hologram area having required information which is not damaged.
CONSTITUTION: This medium is produced by forming a peeling protective layer 12 on a supporting body 11, forming a hologram forming layer 13 on the peeling protective layer 12, and forming a transmissible thin film layer 14 on the hologram forming layer 13. The hologram forming layer 13 has a hologram forming surface on the opposite surface to the adjacent peeling protective layer 12, and the transmissible thin film layer 14 is formed on the hologram forming surface by vapor deposition, sputtering, or the like. The hologram forming layer 13 consists of plural kinds of holograms such as a first hologram area 13a, second hologram area 13b, third hologram area 13c, and forth hologram area 13d. Further, a photothermal converting layer 15 is formed on the transmissible thin film layer 14, and a reflective thin film layer 16 and further an adhesive layer 17 are formed on the photothermal converting layer 15.
| JP4717914 | recoding media |
| JP2001222690 | METHOD FOR PROCESSING INFORMATION OF IC CARD FOR POS DEVICE |
| JP2000127662 | REWRITABLE CARD |
ITO NORIYUKI
KOBAYASHI AKIHIKO
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