Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1993-01-26
1997-05-27
Young, W. R.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4438, 369 4441, G11B 7095
Patent
active
056338457
ABSTRACT:
An optical information recording/reproducing apparatus using an optical device to radiate a reproducing light beam originating from a second light source onto regions of an optical recording medium that include a track on an optical recording medium which contains at least a spot formed by a recording light beam originating from a first light source, these regions being situated behind and in front of the spot formed by the recording light beam relative to the direction of movement of the recording light beam. The apparatus also includes a tracking error signal generator for using light of the reproducing light beam reflected from the optical recording medium to generate a tracking error signal. This apparatus uses the generated error signal to help the recording light beam to track a track on the recording medium, thus controlling the position of the spot formed by the recording light beam so that the spot will lie in the middle of the track all the time.
REFERENCES:
patent: 4578786 (1986-03-01), McIntosh et al.
patent: 5084851 (1992-01-01), Noda et al.
Olympus Optical Co,. Ltd.
Young W. R.
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