Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1996-03-05
1998-09-15
Tran, Thang V.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 4438, 369 441, G11B 700
Patent
active
058089918
ABSTRACT:
An optical information recording and reproducing apparatus records information by running a recording light spot, which has been modulated in accordance with an information signal, on an information track of an information recording medium and applies a verifying light spot after the recording light spot to reproduce the recorded information by the verifying light spot so as to generate a verifying signal. The optical information recording and reproducing apparatus is equipped with a gain selector circuit for changing the gain of the verifying signal according to the modulation of the recording light spot. An output signal of the gain selector circuit is employed to verify the recorded information by the recording light spot.
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Japanese Patent Abstract, Document No. JP404143927A, May 18, 1992.
Patent Abstracts of Japan for document No. 4-143926, vol. 16, No. 424 (P-1415), Sep. 1992.
Patent Abstracts of Japan for document No. 6-012722, vol. 18, No. 216 (P-1728), Apr. 1994.
Canon Kabushiki Kaisha
Tran Thang V.
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