Analysis of astigmatic focusing and push-pull tracking error signals in magnetooptical disk systems.
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.
Mansuripur
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