Mathematical Considerations Behind the Sweep Size-of-Source Effect Method

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Mathematical Considerations Behind the Sweep Size-of-Source Effect Method (121.18 KB)

Size-of-source effect may be quantified in a number of different ways. These quantifications provide needed information for both the user of the radiation thermometer and for its calibration. For determination of size-of-source effect, there are a limited number of test methods furnished by published standards available today. The test methods available may be cumbersome. This paper discusses the mathematics behind an alternative method using a circular aperture and displacement from the center called the sweep method. It discusses this mathematical process in a step-by-step fashion.