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Proceedings Paper

Optical Signal Processor For Moving Target Indication
Author(s): W. Von der Ohe; J. Tindall; R. E. Brooks
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Paper Abstract

A coherent optical processor is described which can be used to detect and locate objects in the sky that move against a background of fixed objects. A succession of sky images is recorded by multiple exposure on photographic film with the imaging system stabilized on the stars. Stars appear as points in the composite image, and moving objects create streaks. Space invariant pattern recognition is performed on this composite image by generating its two-dimensional Fourier transform (spatial frequency spectrum) and scanning it with a rotating spatial filter matched to the streak spectrum. The filter angle at maximum energy transmission determines the streak direction and a second Fourier transform provides coordinate information. The design of the optical system is described and some initial experimental results are shown.

Paper Details

Date Published: 28 December 1977
PDF: 7 pages
Proc. SPIE 0128, Effective Utilization of Optics in Radar Systems, (28 December 1977); doi: 10.1117/12.955987
Show Author Affiliations
W. Von der Ohe, TRW Defense and Space Systems Group (United States)
J. Tindall, TRW Defense and Space Systems Group (United States)
R. E. Brooks, TRW Defense and Space Systems Group (United States)

Published in SPIE Proceedings Vol. 0128:
Effective Utilization of Optics in Radar Systems
Bernard W. Vatz, Editor(s)

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