Optical data storage system with aberration compensation for red

Details Optical data storage system with aberration compensation for red Optical data storage system with aberration compensation for red

1993-10-15

1995-03-07

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4412, 369 4432, 369112, 369120, G11B 713

Patent

active

053964780

ABSTRACT:
An optical data storage system comprises a laser for generating a beam of light, an optical data storage media, transmission optics for directing the beam of light to the optical medium, reception optics for receiving a reflected beam from the medium, and circuits for generating a data, tracking error and focus error signals. The reception optics includes a segmented detector. The signals from at least two of these segments are differentially adjusted such that the resulting output focus error signal is approximately independent of nonfocus wavefront aberrations.

REFERENCES:
patent: 5001334 (1991-03-01), Ikeda
patent: 5097455 (1992-03-01), Marshall
patent: 5105411 (1992-04-01), Ishika
patent: 5113386 (1992-05-01), Whitehead et al.
"Optical Servo Crosstalk", I. Prikryl, Optical Society of America, Technical Digest Series, Optical Data Storage, vol. 1, Jan., 1989.

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