Application of off-axis parabolic mirrors in temperature sensor calibration systems
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Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China
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Corresponding author:
HAO Xiao-jian, haoxiaojian@nuc.edu.cn
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Received Date:
2011-04-11
Accepted Date:
2011-05-30
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Abstract
In order to improve focusing effect of the crystalline lens on the laser beam in a temperature sensor dynamic calibration system,a 90° off-axis parabolic mirror was used instead of the crystalline lens.The influence of the misalignment angle of the 90° off-axis parabolic mirror on the focused laser spot was studied according to geometrical optics.Utilizing the improved system,the CHAL-010-type thermocouple' s time constant at step temperature around 242℃ was tested and the dynamic calibration experiment was carried out.The results show that the new system reconstructed with the 90° off-axis parabolic mirror can fulfill the dynamic calibration of temperature sensors.
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