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Proceedings Paper

Comparison of Fourier transform methods for calculating MTF
Author(s): Joseph D. LaVeigne; Stephen D. Burks; Brian Nehring
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Paper Abstract

Fourier transform methods common in infrared spectroscopy were applied to the problem of calculating the modulation transfer function (MTF) from a system's measured line spread function (LSF). Algorithms, including apodization and phase correction, are discussed in their application to remove unwanted noise from the higher frequency portion of the MTF curve. In general, these methods were found to significantly improve the calculated MTF. Apodization reduces the proportion of noise by discarding areas of the LSF where there is no appreciable signal. Phase correction significantly reduces the rectification of noise that occurs when the MTF is calculated by taking the power spectrum of the complex optical transfer function (OTF).

Paper Details

Date Published: 15 April 2008
PDF: 9 pages
Proc. SPIE 6941, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX, 69410Y (15 April 2008); doi: 10.1117/12.780653
Show Author Affiliations
Joseph D. LaVeigne, Santa Barbara Infrared, Inc. (United States)
Stephen D. Burks, NVESD (United States)
Brian Nehring, Santa Barbara Infrared, Inc. (United States)


Published in SPIE Proceedings Vol. 6941:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIX
Gerald C. Holst, Editor(s)

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