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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 71, Iss. 6 — Jun. 1, 1981
  • pp: 643–650

Confocal feedback systems with space variance, time sampling, and secondary feedback loops

Jack Cederquist and Sing H. Lee  »View Author Affiliations

JOSA, Vol. 71, Issue 6, pp. 643-650 (1981)

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A confocal feedback system (CFS) has been modified in three ways to include space variance, time sampling, and a second feedback loop. The space-variant system performs analog solution of partial differential equations (PDE’s) with variable coefficients. The time-sampling system solves PDE’s in three dimensions. The CFS with a second feedback loop has a more flexible feedback transfer function and can solve an extended range of PDE’s. Finally, a combination of time sampling and a second feedback loop can solve four-dimensional problems. Experimental results verifying the abilities of each of these new confocal feedback systems have been obtained.

© 1981 Optical Society of America

Jack Cederquist and Sing H. Lee, "Confocal feedback systems with space variance, time sampling, and secondary feedback loops," J. Opt. Soc. Am. 71, 643-650 (1981)

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  1. J. Cederquist and S. H. Lee, "Coherent optical feedback for the analog solution of partial differential equations," J. Opt. Soc. Am. 70, 944–953 (1980).
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