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激光全息干涉法在传热研究中得到越来越广泛的应用.本文根据实践经验,讨论了用全息实时干涉法测量二维温度场的一些具体问题.本文指出了前人在实时法中利用普通吸收型全息图的缺点,提出利用位相型全息图代替普通吸收型全息图,试验证明结果比较理想.前人对干涉条纹的数学反演和光折射误差的分析仅是针对光线穿过单层介质的情况而言的,本文在此基础上进一步给出了光线顺序穿过被测介质、光学窗口和空气三层介质时其折射误差的修正公式.
Laser holographic interferometry has been more and more widely used in heat transfer research.In this paper, based on practical experience, some specific problems of measuring two-dimensional temperature field with holographic real-time interferometry are discussed.This paper points out that the predecessors used ordinary Absorption type hologram, proposed the use of phase-type hologram instead of the conventional absorption type hologram, the experiment shows that the result is quite ideal.Previous studies on the mathematical inversion of the interference fringes and light refraction error are only for the light through the single-layer medium On the basis of the above, this paper further gives the correction formula of the refractive error when the light sequence passes through the medium, the optical window and the air three-layer medium.