Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-06-10
1997-12-09
Nelms, David C.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4437, 369288, 369284, 369125, 430495, G11B 700
Patent
active
056967470
ABSTRACT:
A system and method for recording data on an optical recording medium. One system in accordance with the invention includes an optical recording medium which absorbs less radiation at a first wavelength than at a second wavelength; a first optical source to generate a first radiation beam at the first wavelength; a second optical source to generate a second radiation beam at the second wavelength; and means for applying the first radiation beam and the second radiation beam, at least one of which is modulated by recording data, to the recording medium. The second radiation beam, which may have a shorter wavelength than the first radiation beam, induces a shift in the absorption response of a region of the medium. The region then absorbs an increased amount of radiation at the first wavelength such that a high resolution mark may be formed on the medium.
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Chu Kim-Kwok
Eastman Kodak Company
Nelms David C.
Owens Raymond L.
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