Dynamic information storage or retrieval – Storage medium structure – Layered
Patent
1990-10-23
1992-05-26
Levy, Stuart S.
Dynamic information storage or retrieval
Storage medium structure
Layered
369125, 430333, G11B 370, G11B 584, G11B 726, G11B 700
Patent
active
051174162
ABSTRACT:
A recording and readout method for a multi-layer recording film including providing a multi-layer recording film comprising a laminate of plural recording films having a light absorption band in a predetermined wavelength region and having an intrinsic absorption peak; and supplying to the multi-layer recording film a light having a wavelength which is substantially the same as that of the absorption peak of each recording film to effect recording and readout; wherein provided that the light absorption band of the recording film having the absorption peak on the longer wavelength side selected from adjacent absorption peaks is present in a wave length region which is shorter than the absorption peak wavelength on the shorter wavelength side; the recording film having the absorption peak on the shorter wavelength side is caused to have an absorbance which is higher than the absorbance of the recording film having the absorption peak on the longer wavelength side at the absorption peak wavelength on the shorter wavelength side; and the recording film having the absorption peak on the shorter wavelength side is irradiated with a light having a wavelength which is shorter than the light absorption band of the recording film having the absorption peak on the longer wavelength side.
REFERENCES:
patent: 4183094 (1980-01-01), Keezer
patent: 4767696 (1988-08-01), Ishimoto
patent: 4845021 (1989-07-01), Miyazaki
Matsui Fumio
Miyadera Toshiyuki
Okano Makoto
Kessell Michael C.
Levy Stuart S.
Pioneer Electronic Corporation
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