Three-dimensional radiation thermometer combining near-infrared passband thermometry with optical fiber bundle tomography
1 Key Laboratory of Space Active Opto- Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
2 Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University Nanchang 330063, China
Received: 5 July 2013
Accepted: 3 September 2013
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.
PACS: 07.60.Vg – Fiber-optic instruments / 87.63.Hg – Thermography / 42.30.Wb – Image reconstruction; tomography
© EPLA, 2013