Measurement of the MTF and MRTD for focal plane arrays

Alan H. Lettington; Qi He Hong; John Macdonald; A. Marshall; Kevin St. John Murphy; Paul P. Donohue

doi:10.1117/12.154716

31 August 1993 Measurement of the MTF and MRTD for focal plane arrays

Alan H. Lettington, Qi He Hong, John Macdonald, A. Marshall, Kevin St. John Murphy, Paul P. Donohue

Proceedings Volume 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV; (1993) https://doi.org/10.1117/12.154716
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

The use of focal plane arrays (FPAs) in infrared imaging systems is becoming increasingly important. There are problems, however, in measuring their modulation transfer function (MTF) and their minimum resolvable temperature difference (MRTD) since these performance measures vary with the exposition of the image on the FPA. This limitation has been overcome through the introduction of a discrete MTF for these imaging systems using discrete Fourier transform techniques. This discrete MTF is a unique function of spatial frequency and has been measured using a microscanned discrete line spread function. It has also formed the basis of an objective MRTD, the results of which have been compared with subjective measurements.

Citation Download Citation

Alan H. Lettington, Qi He Hong, John Macdonald, A. Marshall, Kevin St. John Murphy, and Paul P. Donohue "Measurement of the MTF and MRTD for focal plane arrays", Proc. SPIE 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV, (31 August 1993); https://doi.org/10.1117/12.154716

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