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Proceedings Paper

The high power CO2 laser study on system of traceability dynamic calibration
Author(s): Weili Chen; Hanchang Zhou; Weiqi Jin
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Paper Abstract

In the paper, a principle is proposed, that is, a high frequency modulated high power CO2 laser is used as the driving source to heat up the sensor. Using the continual beam and the pulsed beam sent out by the same laser in the same system to carry on the static calibration of the infrared detector and the dynamic calibration of the temperature sensor to be checked, the differences in the environment of the sensor installing and the error caused by the change of thermo physical property can be avoided. Thus the difficult problem of traceable temperature dynamic calibration is solved. Tellurium-cadmium-mercury infrared detector which has good response to the CO2 laser beam of 10.6μm wavelength is used to measure the surface temperature time (72μs) excited by the CO2 laser. This dynamic calibration system was used to test the response times of two kinds of thermocouples. The experimental results have shown that this calibration system can be used to calibrate transient surface temperature sensor with a time response of the seconds to sub-milliseconds order and 2000°C. Many thermocouples of company Omega have been tested on the system. The experimental results show that the new calibration method can be used to calibrate surface temperature sensors.

Paper Details

Date Published: 6 February 2008
PDF: 7 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 68231B (6 February 2008); doi: 10.1117/12.757276
Show Author Affiliations
Weili Chen, Beijing Institute of Technology (China)
Hanchang Zhou, North Univ. of China (China)
Weiqi Jin, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 6823:
High-Power Lasers and Applications IV
Dianyuan Fan; Robert F. Walter, Editor(s)

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