An Analysis of Scattering Characteristics of a Beam Wave from Pits with Arbitrary Shapes on Optical Disks
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Numerical solutions of electromagnetic fields are presented for the scattering by pits and guide grooves on optical disks. The boundary element method can be applied to pit scattering of various pit forms under different conditions of the incident beam. Scattering characteristics from concave or convex pits with a section of trapezoid shapes are calculated as functions of the width or the depth (height) of pits.