Magnification and tracking error correction system for multiple

Details Magnification and tracking error correction system for multiple Magnification and tracking error correction system for multiple

1996-07-03

1998-03-17

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, 369 4423, 2502015, G11B 7095

Patent

active

057295123

ABSTRACT:
Methods and apparatus are provided for generating focus, tracking, and magnification error signals in an multi-track optical disk reader. An optical pickup assembly for the disk reader includes an optical sensor having multiple sensor elements. Some of the sensor elements contain multiple divisions whose outputs are summed to produce tracking, focus, and magnification error signals. Electronic and optical mechanical systems are provided for correcting or compensating for magnification errors caused by an optical pickup assembly of a multi-track optical disk reader.

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patent: 5573492 (1996-11-01), Dianna et al.
patent: 5602383 (1997-02-01), Takekoshi et al.

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