Radiant Flux of Near Field in Temperature Measurements

In this work we present a calculation of the radiant flux exiting from an object which is at a constant temperature. The flux calculation is based in the propagation model of irradiance and it permit to predict the small variations in measurements of infrared radiation sources when the pyrometer is...

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Bibliographic Details
Main Authors: Suarez-Romero, J G, Barron, A J Resendiz, Arguello, J O Farias
Format: Conference Proceeding
Language:English
Subjects:
APPROXIMATIONS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
INFRARED RADIATION
MATHEMATICAL MODELS
PYROMETERS
RADIANT FLUX DENSITY
RADIATION EFFECTS
TEMPERATURE MEASUREMENT
VARIATIONS
WAVE PROPAGATION
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Summary:In this work we present a calculation of the radiant flux exiting from an object which is at a constant temperature. The flux calculation is based in the propagation model of irradiance and it permit to predict the small variations in measurements of infrared radiation sources when the pyrometer is going far from the source, this variation is known as distance effect. The classical radiometry defines the quantity radiance, which is used in temperature measurements of objects through the infrared radiation they emit. Unfortunately the radiance does not permit to take into account the variations of the radiant flux measured by the pyrometer due to the wave propagation of the radiation given that the radiance definition is based in ray propagation, the geometrical model. Due to the anterior in this work we present a radiant flux calculation using wave model and considering the approximation of the near field or Fresnel approximation. We show experimental results that confirm our proposal.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2927013