Optical correlator

Details Optical correlator Optical correlator

1978-05-26

1980-06-03

Mullins, James B.

Radiant energy

Photocells; circuits and apparatus

Interference pattern analysis

250237G, 350162SF, 356 28, G02B 2738

Patent

active

042063655

ABSTRACT:
The invention relates to an optical correlator comprising an optical system for imaging an object space, a spatial frequency filter disposed in or close by the image plane, and at least one photoelectric detector assigned to said spatial frequency filter. According to the invention the spatial frequency filter is a raster, the structures of which extend in the direction of the perspective vanishing lines of the image of the object space and/or perpendicularly to at least one of said vanishing lines. The size of the structure elements and/or the distance between the elements constituting the raster structure are chosen according to the distortion of the perspective image.

REFERENCES:
patent: 3550085 (1970-12-01), Silverman
patent: 3599147 (1971-08-01), Rogers et al.
patent: 3711200 (1973-01-01), Maughmer
patent: 3820896 (1974-06-01), Stavis
patent: 3888589 (1975-06-01), Swift

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