Abstract

A servo system for the correction of disk tilt in optical disk data storage is proposed, and its basic concepts are demonstrated by the use of a static system in which the disk does not spin. Because disk tilt produces primarily coma in the beam focused onto the disk, the system uses a variable coma generator to produce an equal and opposite amount of coma as that caused by the tilted disk. The magnitude and direction of disk tilt are detected by the use of the light reflected from the front facet of the disk substrate.

© 1996 Optical Society of America

Versatile objective lens with adjustable correction for different wavelengths and substrate thicknesses for testing optical disks

Ronald E. Gerber, M. Mansuripur, and José M. Sasián
Appl. Opt. 36(11) 2414-2420 (1997)

Problem of track offset in optical disk systems

Ronald E. Gerber, Timothy S. Gardner, and David B. Kay
Appl. Opt. 37(35) 8173-8180 (1998)

Computer simulations of effects of disk tilt and lens tilt on push-pull tracking error signal in an optical disk drive

Chanda L. Bartlett, David Kay, and M. Mansuripur
Appl. Opt. 36(32) 8467-8473 (1997)

Optimization of groove depth for cross-talk cancellation in the scheme of land–groove recording in magneto-optic disk systems

Timothy D. Goodman and M. Mansuripur
Appl. Opt. 35(7) 1107-1119 (1996)

Effects of substrate birefringence and tilt on the irradiance and phase patterns of the return beam in magneto-optical disk data storage

Ronald E. Gerber and M. Mansuripur
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