Optical processing system for synthetic aperture radar

Details Optical processing system for synthetic aperture radar Optical processing system for synthetic aperture radar

1975-02-28

1976-04-13

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 902

Patent

active

039507475

ABSTRACT:
An optical processing system for a synthetic aperture radar moving target indicator or otherwise in which a graduated light filter provides minimum to a maximum transmission over a laser beam width. The laser beam then shines through the filter, an exposed film containing a phase history and through one or more field stop slits or a spatial filter to an unexposed film. The filter compensates for the lack of an infinitely long laser beam required for a Fourier transform of the phase history into what is not but is mostly indistinguishable from a photographic image of stationary and/or moving targets. The filter suppresses false images sometimes called side-lobes.

REFERENCES:
patent: 3560973 (1971-02-01), Kazel
patent: 3727219 (1973-04-01), Graham
patent: 3808596 (1974-04-01), Kazel

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