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Applied Optics

Applied Optics


  • Vol. 22, Iss. 14 — Jul. 15, 1983
  • pp: 2202–2209

Two-dimensional modeling of an optical disk readout

V. B. Jipson and C. C. Williams  »View Author Affiliations

Applied Optics, Vol. 22, Issue 14, pp. 2202-2209 (1983)

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The design of high density digital optical storage systems requires a thorough understanding of the various interactions affecting the integrity of both data and servo signals under various readout conditions. Here, a 2-D Fourier optic model of the readout system is presented along with an efficient calculational procedure based on 2-D fast Fourier transforms (FFT). The model is utilized to examine the effects of data density, focus errors, tracking errors, lens fill conditions, phase pit depth, etc. on the quality of the readout signal. The derivation of servo signals is also studied through the modeling of a simple diffraction based scheme. It is shown that a reasonably constant servo signal (small variations with focus errors, track depth, or added amplitude data) can be generated by this technique provided that a λ/8 phase groove is present. The same technique can be shown to be unacceptable if an amplitude or λ/4 phase groove is utilized.

© 1983 Optical Society of America

Original Manuscript: March 17, 1983
Published: July 15, 1983

V. B. Jipson and C. C. Williams, "Two-dimensional modeling of an optical disk readout," Appl. Opt. 22, 2202-2209 (1983)

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