Two-dimensional temperature field measurement by laser interference based on fringes Fourier transformation

doi:10.3969/j.issn.0253-2778.2020.06.016

Abstract

Abstract: A temperature measurement method using laser interference fringe Fourier transformation was presented. Based on the Mach-Zehnder interferometer, the candle axisymmetric flame temperature field was used to verify the presented method. Using interferogram undisturbed by temperature field in the process of recovering phase shift, the linear deviation caused by image digitization in the phase was corrected. By comparing the results of various filters, it is shown that features of the filter have a significant impact on the result, and the cosine-shaped edge filter with appropriate parameters can effectively extract the spectrum information. Experimental results of candle flame indicate that the presented method can be used to measure two-dimensional temperature distributions quickly and conveniently.

Key words: interferometry, temperature measurement, fringes Fourier transformation, Mach-Zehnder interferometer

CLC Number:

TK39

CHEN Yu,ZHANG Haifeng,LU Rongde,CHEN Yue,HE Liqun. Two-dimensional temperature field measurement by laser interference based on fringes Fourier transformation[J]. Journal of University of Science and Technology of China, 2020, 50(6): 832-838.

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