Achieving high-temperature measurement accuracy over a wide ambient-temperature range in thermal imaging radiometers

Robert J. Herring

doi:10.1117/12.137980

16 September 1992 Achieving high-temperature measurement accuracy over a wide ambient-temperature range in thermal imaging radiometers

Robert J. Herring

Author Affiliations +

Proceedings Volume 1689, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing III; (1992) https://doi.org/10.1117/12.137980
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

This paper reviews the accuracy requirements ofthermal imaging radiometers, for various wavelengths and optical configurations, that must be maintained over the specified ambient temperature range for the instrument. The paper focuses on the Inframetrics 700 Series Radiometers, and briefly reviews the scanner architecture and video signal processing electronics to provide a background for the problem presented. Subsystem component parametric variations, affected by fluctuations in ambient temperature, are enumerated. These variations directly affect the temperature measurement accuracy ofthe system. To exceed the temperature measurement accuracy specification for the instrument, and achieve the highest measurement accuracy possible, Inframetrics individually calibrates each radiometer over the specffied ambient temperature range. This paper describes the Ambient Temperature Calibration (ATC) process. Data collection and test methods used to develop this process are outlined. Initial and ongoing process validation methodology is discussed. Product quality and reliability benefits as a byproduct of this process are also presented.

Citation Download Citation

Robert J. Herring "Achieving high-temperature measurement accuracy over a wide ambient-temperature range in thermal imaging radiometers", Proc. SPIE 1689, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing III, (16 September 1992); https://doi.org/10.1117/12.137980

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