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Proceedings Paper

Performance Measurements Of Infrared Imaging Systems Used To Assess Thermal Anomalies
Author(s): Y. May Chang; Richard A. Grot
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Paper Abstract

An evaluation of various infrared imaging systems was performed to determine their abilities to identify thermal anomalies in buildings. The systems were tested under environmental temperatures from -20°C to 25°C for their minimum resolvable temperature differences (MRTD) at spatial frequencies between 0.03 to 0.25 cy/mrad. The temperature dependence of MRTD was analyzed and compared with the predicted values in ASHRAE standard 101-83 for thermal imaging systems. The temperature dependence of infrared systems' object temperature calibrations was investigated. The signal transfer function (SiTF) of infrared sensors were generated to verify and calibrate the dynamic range of each sensor. Also discussed are the results of measurements of modulation transfer function (MTF) of infrared imaging systems, which are based on Fourier Transforms of the line spread function (LSF). It is shown that the results of the MTF calculations can be correlated with their MRTD measurements.

Paper Details

Date Published: 5 August 1986
PDF: 14 pages
Proc. SPIE 0636, Thermal Imaging, (5 August 1986); doi: 10.1117/12.964192
Show Author Affiliations
Y. May Chang, National Bureau of Standards (United States)
Richard A. Grot, National Bureau of Standards (United States)

Published in SPIE Proceedings Vol. 0636:
Thermal Imaging
Irving R. Abel, Editor(s)

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