Optical correlator

Details Optical correlator Optical correlator

1983-02-09

1985-09-03

Smith, Jerry

Boots, shoes, and leggings

364819, 35016213, G06G 900

Patent

active

045396515

ABSTRACT:
An optical correlator having a series of optical elements necessary for providing the comparison or correlation of incoming optical signals and for providing a readout beam representive of the correlation between the input signals; and a detection system which is capable of rapidly and reliably detecting intensity peaks in the readout beam. These intensity peaks establish the actual correlation between the optical input signals. The detection system incorporates therein a pair of optical fibers, one of which having associated therewith an electro-optic component for effectively varying the length of that fiber. By varying the effective length of one of the fibers, an intensity detector can provide an output of the intensity peaks necessary in making the actual correlation determination between the optical input signals.

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Weaver et al., "A Technique for Optically Convolving Two Functions", Applied Optics, vol. 5, No. 7, Jul. 1966, pp. 1248, 1249.
A. VanderLugt, "Signal Detection by Complex Spatial Filtering", IEEE Transactions on Information Theory, vol. IT-10, No. 2, Apr. 1969, pp. 139-145.
Dobele, H. F. et al., "Application of a Fabry Perot Spectrometer to the Measurement of Spectral Line Shifts much Smaller than Line Width", Applied Optics, vol. 15, No. 1, Jan. 1976, pp. 69-72.

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