Abstract

A novel thin-filament pyrometer is presented. It involves a consumer-grade color digital still camera with 6 megapixels and 12 bits per color plane. SiC fibers were used and scanning-electron microscopy found them to be uniform with diameters of 13.9  μm. Measurements were performed in a methane–air coflowing laminar jet diffusion flame with a luminosity length of 72   mm. Calibration of the pyrometer was accomplished with B-type thermocouples. The pyrometry measurements yielded gas temperatures in the range of 1400–2200 K with an estimated uncertainty of ±60   K, a relative temperature resolution of ±0.215   K, a spatial resolution of 42   μm, and a temporal resolution of 0.66   ms. Fiber aging for 10 min had no effect on the results. Soot deposition was less problematic for the pyrometer than for the thermocouple.

© 2007 Optical Society of America

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