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Proceedings Paper

Performance prediction and experimental assessment of advanced thermal imagers
Author(s): Wolfgang Wittenstein
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Paper Abstract

For the assessment of undersampled systems, it is proposed to replace the MRTD with the MTDP (minimum temperature difference perceived). As the MRTD, the MTDP is based on the perception of the standard four bar test pattern, but it is not required that all four bars be resolved in the image. The MTDP refers to a specific phase position which is called the optimum phase, and is derived from the average modulation in the reproduced image. Reproducible measurements can be obtained with this technique up to spatial frequencies of about 85% of the sampling frequency. The MTDP can be predicted with the same analytical approach known for the MRTD by replacing the system MTF with the average modulation at optimum phase. Measured MTDP data is presented for several undersampled systems and compared to analytical predictions.

Paper Details

Date Published: 17 October 1994
PDF: 12 pages
Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); doi: 10.1117/12.188697
Show Author Affiliations
Wolfgang Wittenstein, FGAN Forschungsinstitut fuer Optik (Germany)


Published in SPIE Proceedings Vol. 2269:
Infrared Technology XX
Bjorn F. Andresen, Editor(s)

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