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1 October 2009 Fourier theory in temperature measurements
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The instruments in temperature measurements with infrared radiation are the radiation pyrometers or radiometers, some of them of double cavity and with or without imaging lenses. In the case of scale realizations is important to know the function of the instrument. In a previous work we published such a function for the case of instruments without lens considering the partial coherence theory. However the resulted expression consists of a four-fold integral which makes difficult its physical interpretation. In this work we present such functions for instruments with lenses and use Fourier techniques to obtain expressions easier to manipulate and to interpret. The instrument functions are evaluated and discussed its physical interpretation for both cases; with lenses and without lenses, through two practical examples.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. G. Suarez-Romero and J. L. Rodriguez-Valdelamar "Fourier theory in temperature measurements", Proc. SPIE 7427, Optical Modeling and Performance Predictions IV, 74270C (1 October 2009);

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