Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1990-06-15
1994-06-07
Chin, Tommy P.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 32, G11B 700
Patent
active
053196236
ABSTRACT:
A data-track search apparatus is provided with: a tracking error detection unit for detecting a positioning error between a light beam on a record carrier and a track; a moving unit for moving the light beam on the record carrier in a direction traversing the tracks on the record carrier; a focusing control failure detection unit for detecting a focusing control failure, and a control unit for controlling the moving unit in response to an output signal from the tracking error detection unit during the search for a desired track. The control unit regulates the moving unit so as not to accelerate but to decelerate the moving unit in the event of a focusing control failure.
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"High Speed Accessing Magneto-Optical Disk Drive", SPIE, vol. 899-Optical Storage Technology & Applications, Ishibashi et al., (1988), pp. 8-15.
Moriya Mitsuro
Yamada Shin-ichi
Yamaguchi Hiroyuki
Chin Tommy P.
Matsushita Electric - Industrial Co., Ltd.
Tran Thai
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