Three-dimensional radiation thermometer combining near-infrared passband thermometry with optical fiber bundle tomography

摘要

We report an implementation of a three-dimensional (3D) middle-temperature (500-1500 kelvin) radiation thermometer, which combines a near-infrared passband (1-3 micron) thermometry with an optical fiber bundle tomography (OFBT). To improve the probe precision, we calibrate the digital output of each OFB unit vs. the passband radiant intensity of the blackbody. Furthermore a digital signal processor (DSP) based system is built to accomplish the emission signal processing and the tomographic computation with which the calculation speed can be improved. A temperature probe experiment of the flame of a candle has testified the feasibility of the OFBT-based 3D thermometer.