Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1992-05-12
1994-04-12
Dzierzynski, Paul M.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4435, G11B 7125
Patent
active
053032225
ABSTRACT:
This optical record reproducing apparatus automatically controls the light amount of a reproducing light source and comprises a switching device switching on/off the control of a reproducing light source driving electric current by an automatic light amount controlling device to prevent the fluctuation of the emitted light amount of the reproducing light source during the operation of reading the data out of an optical recording medium and switching off the control of the reproducing light source driving electric current at least during an operation of reading out the information recorded in the optical recording medium and a holding device holding the light source driving electric current just before switching off the control of the reproducing light source driving electric current by the automatic light amount controlling device by this switching device.
REFERENCES:
patent: 4855988 (1989-08-01), Shinbayashi et al.
patent: 5059780 (1991-10-01), Kakuta et al.
patent: 5126993 (1992-06-01), Yokota
patent: 5202873 (1993-04-01), Ito et al.
Beyer James
Dzierzynski Paul M.
Olympus Optical Co,. Ltd.
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