A high-speed, eight-wavelength visible light-infrared pyrometer for shock physics experiments

An eight-channel, high speed pyrometer for precise temperature measurement is designed and realized in this work. The addition of longer-wavelength channels sensitive at lower temperatures highly expands the measured temperature range, which covers the temperature of interest in shock physics from 1...

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Bibliographic Details
Published inAIP advances Vol. 7; no. 9; pp. 095014 - 095014-9
Main Authors Wang, Rongbo, Li, Shengfu, Zhou, Weijun, Luo, Zhen-Xiong, Meng, Jianhua, Tian, Jianhua, He, Lihua, Cheng, Xianchao
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.09.2017
AIP Publishing LLC
Subjects
Bandwidths
Detectors
High speed
Indium gallium arsenides
Infrared detectors
Photoelectricity
Rangefinding
Temperature
Temperature measurement
Transmissivity
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Summary:An eight-channel, high speed pyrometer for precise temperature measurement is designed and realized in this work. The addition of longer-wavelength channels sensitive at lower temperatures highly expands the measured temperature range, which covers the temperature of interest in shock physics from 1500K-10000K. The working wavelength range is 400-1700nm from visible light to near-infrared (NIR). Semiconductor detectors of Si and InGaAs are used as photoelectric devices, whose bandwidths are 50MHz and 150MHz respectively. Benefitting from the high responsivity and high speed of detectors, the time resolution of the pyrometer can be smaller than 10ns. By combining the high-transmittance beam-splitters and narrow-bandwidth filters, the peak spectrum transmissivity of each channel can be higher than 60%. The gray-body temperatures of NaI crystal under shock-loading are successfully measured by this pyrometer.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4996927