Optical noise suppression device and method

Details Optical noise suppression device and method Optical noise suppression device and method

1975-06-30

1976-08-31

Stern, Ronald J.

G02B 2738

Patent

active

039777715

ABSTRACT:
Disclosed is a device and method for suppression of optical noise in an optical spatial filtering system using highly coherent light. In the disclosed embodiment, input photographic film to be processed in the system, and output photographic film to be exposed, are each mounted on lateral translation devices. During application of the coherent light for exposure of the output film, the two translation devices are moved in synchronism by a motor-driven gear and linkage assembly. The ratio of the resulting output film translation to the input film translation is equal to the magnification of the optical data processing system. The noise pattern associated with the lenses and other elements in the optical processing system remains stationary while the image-producing light moves laterally through the pattern with the output film, thus averaging out the noise effect at the output film.

REFERENCES:
patent: 3482102 (1969-12-01), Thomas
patent: 3492635 (1970-01-01), Farr
patent: 3620598 (1971-11-01), Brandt
patent: 3770340 (1973-11-01), Cronin et al.

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