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The Optimization of an Optical Missile Guidance Tracker

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Abstract

An antitank missile guidance system is described, which employs a tracker using two parallel optical paths and a pyrotechnic flare. Both optical channels are spectrally filtered; one rejects the target and views only the flare image; the other rejects the flare and views only the target. In performing the guidance tracking task, the operator superimposes the flare image on the target, thus providing steering signals to the missile. This paper describes an optimum flare as one with maximum luminous spectral emittance, minimum bandwidth, and minimum noise. Then with the selected flare as a basis, the optical components are matched individually and as an assembly to obtain maximum flare–filter system output. Calculated improvements of 100 to 250% were obtained in the performance of critical components which were reflected in the system operation and were subsequently verified by system field tests. The transmission ratios, visibility coefficients, improvement factors, and other bases for improvement are stated and discussed. Finally, the experiments performed and improvements achieved are described.

© 1969 Optical Society of America

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