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Proceedings Paper

Requirements for the optical insertion of thermal references sources
Author(s): Howard V. Kennedy
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Paper Abstract

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.

Paper Details

Date Published: 10 August 1993
PDF: 8 pages
Proc. SPIE 1970, Systems-Oriented Optical Design, (10 August 1993); doi: 10.1117/12.155838
Show Author Affiliations
Howard V. Kennedy, Texas Instruments Inc. (United States)

Published in SPIE Proceedings Vol. 1970:
Systems-Oriented Optical Design
Thomas U. Kampe; Joseph H. Oberheuser, Editor(s)

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