Effects of phasing on MRT target visibility

Gerald C. Holst

doi:10.1117/12.45828

1 September 1991 Effects of phasing on MRT target visibility

Gerald C. Holst

Proceedings Volume 1488, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing II; (1991) https://doi.org/10.1117/12.45828
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

MRT target visibility is affected by the relative phase between the target location and the sampling lattice of thermal imaging systems. Undersampled systems such as staring arrays are particularly susceptible to phasing effects. For input spatial frequencies which range from 0.6 to 0.9 times the Nyquist frequency, bar fidelity is lost and the MRT is increased at these spatial frequencies. In apparent contradiction to Nyquist theory, it is possible to perceive MRT targets whose spatial frequencies are between Nyquist and 1.1 times Nyquist frequency.

Citation Download Citation

Gerald C. Holst "Effects of phasing on MRT target visibility", Proc. SPIE 1488, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing II, (1 September 1991); https://doi.org/10.1117/12.45828

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