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Applied Optics

Applied Optics


  • Vol. 22, Iss. 12 — Jun. 15, 1983
  • pp: 1887–1892

Automated Foucault test for focus sensing

David G. Kocher  »View Author Affiliations

Applied Optics, Vol. 22, Issue 12, pp. 1887-1892 (1983)

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A chopper wheel, a bicell photodetector, and an electronic phase detector are used in a mechanization of the Foucault optical test to obtain a linear focus error voltage for an isolated point image. Geometrical and diffraction analyses of the technique are included which show the sensitivity of the technique to aberrations of higher order than focus.

© 1983 Optical Society of America

Original Manuscript: December 20, 1982
Published: June 15, 1983

David G. Kocher, "Automated Foucault test for focus sensing," Appl. Opt. 22, 1887-1892 (1983)

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  1. M. Born, E. Wolf, Principles of Optics (Pergamon, New York, 1959).
  2. D. Malacara, Ed., Optical Shop Testing (Wiley, New York, 1978), Appendix 2.
  3. E. H. Linfoot, Recent Advances in Optics (Oxford U.P., London, 1958), pp. 128–175.

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