Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1992-12-02
1994-03-22
Dzierzynski, Paul M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369120, 369106, G11B 7125
Patent
active
052971287
ABSTRACT:
An optical information recording/reproducing apparatus provided with a device for irradiating an information track of an optical information recording medium with a preheating light beam. Simultaneously, a recording/reproducing light beam irradiates a light spot of the preheating light beam on the recording medium. The light intensity of the preheating light beam is varied in accordance with the environmental temperature of the apparatus detected by a detector. By such a construction, the recording/reproducing condition of information is kept constant, irrespective of the environmental temperature.
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Hoshi Hiroaki
Matsumura Susumu
Morishima Hideki
Yamaguchi Eiji
Yamamoto Masakuni
Beyer James
Canon Kabushiki Kaisha
Dzierzynski Paul M.
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