Performance Measurements Of Infrared Imaging Systems Used To Assess Thermal Anomalies

Y. May Chang; Richard A. Grot

doi:10.1117/12.964192

5 August 1986 Performance Measurements Of Infrared Imaging Systems Used To Assess Thermal Anomalies

Y. May Chang, Richard A. Grot

Proceedings Volume 0636, Thermal Imaging; (1986) https://doi.org/10.1117/12.964192
Event: 1986 Technical Symposium Southeast, 1986, Orlando, United States

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.

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Y. May Chang and Richard A. Grot "Performance Measurements Of Infrared Imaging Systems Used To Assess Thermal Anomalies", Proc. SPIE 0636, Thermal Imaging, (5 August 1986); https://doi.org/10.1117/12.964192

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KEYWORDS

Temperature metrology

Imaging systems

Infrared imaging

Calibration

Minimum resolvable temperature difference

Modulation transfer functions

Spatial frequencies

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