Apparatus for detecting an output image of an optical correlatio

Details Apparatus for detecting an output image of an optical correlatio Apparatus for detecting an output image of an optical correlatio

1978-12-18

1980-06-10

Corbin, John K.

Optics: measuring and testing

By polarized light examination

With light attenuation

356356, G01B 1114

Patent

active

042070023

ABSTRACT:
A coherent optical correlation system produces an output signal in the form of a beam of light which if focused onto an output plane would produce a spot of light somewhere in that output plane. To detect the position that spot would have in the output plane, the output beam is formed into two parts by a beam splitter and each part is passed through a multiple image diffraction grating arranged mutually at right angles to thereby form a linear array of spots parallel to the x and y axes of a correlation output plane. Each series of output spots illuminates a photodiode in a linear diode array thereby identifying the x and the y coordinates of a correlation image.

REFERENCES:
patent: 3666359 (1972-05-01), Lee
patent: 4045140 (1977-08-01), Bumgardner
patent: 4074131 (1978-02-01), Schwebel

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