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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 10, Iss. 11 — Nov. 1, 1971
  • pp: 2482–2487

Interference Method for Pattern Comparison

H. Weinberger and U. Almi  »View Author Affiliations


Applied Optics, Vol. 10, Issue 11, pp. 2482-2487 (1971)
http://dx.doi.org/10.1364/AO.10.002482


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Abstract

A test pattern may be compared with a reference pattern by placing the two side by side in a coherent beam. If the compared patterns are sufficiently similar, regular parallel fringes will modulate the common Fraunhofer diffraction pattern of the compared samples. The regularity of the interference fringes is a measure of the similarity between the compared patterns. The sensitivity of the method is not disturbed by small absolute and relative displacements of test and reference signals. The effect of even small rotations is, however, severe. The effect of random noise is to reduce the contrast of the interference fringes.

© 1971 Optical Society of America

History
Original Manuscript: September 14, 1970
Published: November 1, 1971

Citation
H. Weinberger and U. Almi, "Interference Method for Pattern Comparison," Appl. Opt. 10, 2482-2487 (1971)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-10-11-2482

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