Discrete frequency-versus-radius reticle trackers

Ronald G. Driggers

doi:10.1117/12.45619

1 July 1991 Discrete frequency-versus-radius reticle trackers

Ronald G. Driggers

Proceedings Volume 1478, Sensors and Sensor Systems for Guidance and Navigation; (1991) https://doi.org/10.1117/12.45619
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

This paper presents a general expression for the transmission function of the discrete frequency-versus-radius reticle and compares such a reticle to the more common continuous reticle. A discrete form of the frequency-versus-radius reticle has an integer number of chopping cycles on a single radius. The discrete form limits the resolution of the reticle in the radial direction, but this limit is not severe for small target images. However, since no phase reversal occurs, electronic processing is simplified. Also, a tracker is presented that utilizes two discrete frequency-versus-radius reticles that can track large objects and eliminates target cancellation.

Citation Download Citation

Ronald G. Driggers "Discrete frequency-versus-radius reticle trackers", Proc. SPIE 1478, Sensors and Sensor Systems for Guidance and Navigation, (1 July 1991); https://doi.org/10.1117/12.45619

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