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一、前言在风洞的光学测量技术中,提出了提高灵敏度的迫切要求,同时,为克服风洞运转时振动的影响,促进了脉冲激光技术的发展。但脉冲激光技术仍然解决不了两次曝光全息干涉技术中的问题,即两次曝光间的振动引入的误差。在某些风洞中,被照模型位移很大,使全息两次曝光技术完全失效。本文就是企图解决这两个技术难题的一个尝试。
I. INTRODUCTION In the optical measurement technology of wind tunnel, the urgent requirement of improving the sensitivity is proposed. Meanwhile, in order to overcome the influence of vibration when wind tunnel is operating, the development of pulse laser technology is promoted. However, the pulsed laser technology still can not solve the problem of the double exposure holographic interference technology, that is, the error introduced by the vibration between the two exposures. In some wind tunnels, the illuminated model is highly displaced, rendering the holographic double exposure technique completely ineffective. This article is an attempt to solve these two technical problems.