Open AccessA high-speed, eight-wavelength visible light-infrared pyrometer for shock physics experiments
Author(s) -
Rongbo Wang,
Shengfu Li,
Weijun Zhou,
Zhenxiong Luo,
Jianhua Meng,
Tian Jianhua,
HE Li-hua,
Xianchao Cheng
Publication year - 2017
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4996927
Subject(s) - pyrometer , optics , wavelength , optoelectronics , infrared , transmittance , materials science , responsivity , physics , photodetector , detector , beam splitter , black body radiation , photoelectric effect , temperature measurement , radiation , quantum mechanics , laser
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
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