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Radial error signal simulation for optical disk drives

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Abstract

A diffraction optics method of calculating radial tracking error signals for optical disk drives is presented. This method is capable of simulating both twin spot and push–pull tracking. The results of a microcomputer simulation using this method are described and compared with experimental results. The use of this model to measure the phase contrast of optical media is discussed. In particular, the appearance of phase contrast in samples intended for use as amplitude contrast media is examined.

© 1986 Optical Society of America

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