OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 12, Iss. 4 — Apr. 1, 1973
  • pp: 743–748

Additional Filters Enhancing the Sensitivity of an Optical Correlator

A. Engel  »View Author Affiliations

Applied Optics, Vol. 12, Issue 4, pp. 743-748 (1973)

View Full Text Article

Enhanced HTML    Acrobat PDF (642 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



The influence of additional filters upon the output of an optical correlator is studied for the case of a spatial filter measuring the size of rectangles. Addtional filters leading to increased sensitivity are derived by means of a series expansion. One type of additional filter, consisting of several transparent slits, yields a linear relation between output signal and the deviation from the desired size. The other additional filter, effecting a quadratic output characteristic, is a properly dimensioned bandpass. Experimental results demonstrate the enhancement of sensitivity achieved with additional filters. As this method can easily be extended to a correlator measuring the diameter of circular apertures, additional filters may be of interest in the field of automatic production control.

© 1973 Optical Society of America

Original Manuscript: June 8, 1972
Published: April 1, 1973

A. Engel, "Additional Filters Enhancing the Sensitivity of an Optical Correlator," Appl. Opt. 12, 743-748 (1973)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. A. Vander Lugt, IEEE IT-10, 139 (1964).
  2. S. Lowenthal, Y. Belvaux, Optica Acta 14, 245 (1967). [CrossRef]
  3. D. Huhn et al., Phys. Lett. 27A, 51 (1968).
  4. R. A. Binns et al., Appl. Opt. 7, 1047 (1968). [CrossRef] [PubMed]
  5. J. Bulabois et al., Opt. Technol. 1, 191 (1969). [CrossRef]
  6. U. Wagner, Opt. Commun. 3, 130 (1971). [CrossRef]
  7. W. T. Cathey, J. Opt. Soc. Am. 61, 478 (1971). [CrossRef]
  8. J. E. Wasielewski, Appl. Opt. 10, 2439 (1971). [CrossRef] [PubMed]
  9. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York1968), p. 175.
  10. M. Abramowitz, I. Stegun, Handoook of Mathematical Functions (Dover Publications, Inc., New York, 1968), p. 231.
  11. W. Lukosz, J. Opt. Soc. Am. 56, 1463 (1966). [CrossRef]
  12. W. Lukosz, J. Opt. Soc. Am. 57, 932 (1967). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited