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Proceedings Paper

Laser Agile Illumination For Object Tracking And Classification Feasibility Study
Author(s): Marija S. Scholl; Jakob J. VanZyl; Aden B. Meinel; Marjorie P. Meinel; James W.. Scholl
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Paper Abstract

Some of the strategic-initiative-type threats that may face the population include an attack by a large number of very similar objects, such as missiles surrounded by an even larger number of decoys. The feasibility of discriminating among two different classes of objects that have no difference in appearance and no intrinsic signature is investigated. In the direct imaging approach, a decoy will appear to be identical to a missile. Therefore, imaging is eliminated as the approach to separating real threat objects from simulated objects. Another discrimination approach is based on the agile illumination concept. Agile illumination consists of a two-aperture illumination with a coherent light (such as laser), diffraction of light due to propagation, and the resulting interference on the object surface. A scanning two-beam interference pattern illuminates one object at a time. After the propagation time delay, the light reflected from the object is collected and analyzed for amount and temporal dependence. Depending on the shape, momentum, spinning, and tumbling characteristics of the interrogated object, different temporal signatures will be obtained for different classes of objects. The study shows that even for identical objects with no intrinsic signature, agile illumination can be used to discriminate between objects. Their different physical and dynamic characteristics are expected to differentiate the decoys from the threat objects.

Paper Details

Date Published: 3 May 1988
PDF: 8 pages
Proc. SPIE 0887, Acquisition, Tracking, and Pointing II, (3 May 1988); doi: 10.1117/12.944207
Show Author Affiliations
Marija S. Scholl, California Institute of Technology (United States)
Jakob J. VanZyl, California Institute of Technology (United States)
Aden B. Meinel, California Institute of Technology (United States)
Marjorie P. Meinel, California Institute of Technology (United States)
James W.. Scholl, Alenka Associates (United States)

Published in SPIE Proceedings Vol. 0887:
Acquisition, Tracking, and Pointing II
James E. Kimbrell, Editor(s)

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