A spectro-radiometric calibration station for blackbody sources

Joseph D. LaVeigne; Sean Strickland; Charles Petkovich; Len Kamlet

doi:10.1117/12.2670070

14 June 2023 A spectro-radiometric calibration station for blackbody sources

Joseph D. LaVeigne, Sean Strickland, Charles Petkovich, Len Kamlet

Proceedings Volume 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV; 125330Y (2023) https://doi.org/10.1117/12.2670070
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Accurate radiometric calibration of IR sources can be challenging, but is required for advanced sensors being used today. Santa Barbara Infrared has developed a new test facility to provide spectro-radiometric calibration of extended area sources. The station comprises a Bruker Invenio Fourier transform infrared spectrometer or FTIR, a NIST-traceable, high-emissivity DB-04 blackbody reference and an automated stage for switching between the reference source and unit under test. The system uses a series of differential measurements to perform the radiometric calibration. The first output of the calibration is a spectral emissivity that can be used to calculate output radiance based on the temperature as measured in the well of the blackbody source. The second output of the calibration is a derived gradient term allowing the calculation of the temperature of the surface of the source based on the temperature of the thermometric measurement well and the temperature of the ambient environment. The additional gradient term allows for improved radiometric accuracy when operating at source and environment temperatures different from those at which the source was calibrated.

Conference Presentation

Citation Download Citation

Joseph D. LaVeigne, Sean Strickland, Charles Petkovich, and Len Kamlet "A spectro-radiometric calibration station for blackbody sources", Proc. SPIE 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV, 125330Y (14 June 2023); https://doi.org/10.1117/12.2670070

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