10 August 1993 Requirements for the optical insertion of thermal references sources
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Thermal radiation sources are often used in thermal imaging sensors as reference sources for offset equalization and gain normalization of the infrared detecting elements. For best results, the `t-number' by which the detector elements view these sources must be exactly equal to that with which they view the external scene. If the t-numbers for different detecting elements are not the same, the result will be inaccurate offset equalization and imperfect gain normalization. The relationship between the scene temperature, reference source temperature, and t-number differences are derived. Quantitative values for the errors in gain and level normalization are calculated.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Howard V. Kennedy, Howard V. Kennedy, } "Requirements for the optical insertion of thermal references sources", Proc. SPIE 1970, Systems-Oriented Optical Design, (10 August 1993); doi: 10.1117/12.155838; https://doi.org/10.1117/12.155838

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