Abstract

Methods of geometrical optics are used in deriving a simple expression for the focus error signal in terms of the parameters of an astigmatic system. The extent of validity of this result is then examined by comparison with diffraction calculations. Diffraction analysis also permits the study of push–pull tracking error signal from pregrooved disk surfaces.

© 1987 Optical Society of America

Ring-lens focusing and push-pull tracking scheme for optical disk systems

James J. Zambuto, Ronald E. Gerber, J. Kevin Erwin, and M. Mansuripur
Appl. Opt. 33(34) 7987-7994 (1994)

Causes of focus-error feedthrough in optical-disk systems: astigmatic and obscuration methods

Bruce E. Bernacki and M. Mansuripur
Appl. Opt. 33(5) 735-743 (1994)

Characterization of a novel focusing/tracking technique with increased feedthrough immunity for optical-disk applications: the double-astigmatic method

Bruce E. Bernacki, Keith Bates, M. Mansuripur, Delbert Hansen, and Daniel Cisneros
Appl. Opt. 32(29) 5789-5796 (1993)

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)

Effects of an asymmetrically molded plastic objective lens on the push–pull tracking-error signal in an optical disk drive

Kai Man Hung
Appl. Opt. 39(8) 1309-1314 (2000)