Abstract

In optical video recording the information is usually read from the disk by a scanning laser beam. We apply the theory of imaging in partially coherent light to this, situation. We assume that the disk is a thin phase object, and that the information pattern consists of tracks of a width that is small compared to the diameter of the reading spot. We obtain simple expressions for the amplitudes of the signals generated by the playback system. Also intermodulation products and cross talk between the tracks are considered.

© 1978 Optical Society of America

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