Radiation pyrometric measurements with distance to the source effect and size-of-the-source effect corrections

Juan Carlos Solorio-Leyva; Jose Guadalupe Suarez-Romero; Juan B. Hurtado-Ramos; Eduardo Tepichin-Rodriguez; Jose-German Cortes-Reynoso

doi:10.1117/12.558959

15 October 2004 Radiation pyrometric measurements with distance-to-the-source effect and size-of-the-source effect corrections

Juan Carlos Solorio-Leyva, Jose Guadalupe Suarez-Romero, Juan B. Hurtado-Ramos, Eduardo Tepichin-Rodriguez, Jose-German Cortes-Reynoso

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Proceedings Volume 5526, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control; (2004) https://doi.org/10.1117/12.558959
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Radiation pyrometers are widely used in industries and laboratories for non-contact temperature measurement of objects. In the case of very accurate pyrometry, the measurements are affected by two effects, namely, the size-of-source effect (SSE) and the distance to the source effect (DE). The lack of accuracy in the measurements due to the SSE is associated to variations in the size of the object for a fixed measuring distance, whereas for the DE is associated to variations of the measuring distance for a fixed size of the object. In this work we present a numerical method that can be used for the calculation of corrections for both effects. In this case the method is applied to a lensless double aperture pyrometer. The method is based on the theory of partial coherence for the calculation of the energy transport through the pyrometer. The corrections can be made for sources of any size and shape and for any distance. In this case we consider sources of circular shape given our black body radiators. We present experimental results that confirm our numerical calculations.

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Juan Carlos Solorio-Leyva, Jose Guadalupe Suarez-Romero, Juan B. Hurtado-Ramos, Eduardo Tepichin-Rodriguez, and Jose-German Cortes-Reynoso "Radiation pyrometric measurements with distance-to-the-source effect and size-of-the-source effect corrections", Proc. SPIE 5526, Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control, (15 October 2004); https://doi.org/10.1117/12.558959

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KEYWORDS

Distance measurement

Temperature metrology

Pyrometry

Black bodies

Sensors

Radiometry

Numerical analysis

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