TY - GEN
T1 - Discrete frequency-versus-radius reticle trackers
AU - Driggers, Ronald G.
PY - 1991
Y1 - 1991
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:0025795684
SN - 0819405876
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 24
EP - 32
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Publ by Int Soc for Optical Engineering
T2 - Sensors and Sensor Systems for Guidance and Navigation
Y2 - 2 April 1991 through 3 April 1991
ER -