Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1990-02-06
1993-03-02
McElheny, Jr., Donald
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369124, G11B 700
Patent
active
051915723
ABSTRACT:
A dual light source optical recording and playback system which comprises a first light source which is a semiconductor laser for irradiating tracks of a recording medium with recording spot light to record pits as information units, a second light source for irradiating the tracts with playback spot light, detection means for detecting the output of the semiconductor laser which changes in response to return light available as the recording spot light is reflected on the track of the recording medium and returned to the semiconductor laser, and a timing signal generator for generating a timing signal for the recording of the next pit on the track in response to a detection output from the detection means which corresponds to the return light due to reflection by the recorded pit.
REFERENCES:
patent: 4516242 (1985-05-01), Yokota
patent: 4685097 (1987-08-01), van der Put
patent: 4700336 (1987-10-01), Yoshida et al.
patent: 4855988 (1989-08-01), Shinbayashi et al.
patent: 4998237 (1991-03-01), Osakabe et al.
patent: 5001692 (1991-03-01), Farla et al.
Sogo Koji
Tsuboi Kazuo
Tsutsui Keiichi
McElheny Jr. Donald
Omron Corporation
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