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相移技术(即准外差)近年来已在全息、散班干涉计量中获得了广泛的应用,它的基本思想是:通过人为改变两干涉波面的相对位相,比较干涉场中同一点在不同时刻光强的大小来求解读点的相位值。这种方法
In recent years, the phase shift technique (ie, quasi-heterodyne) has been widely used in holographic and scattered class interferometry. The basic idea is that by artificially changing the relative phase of the two interferometric waveforms and comparing the same points in the interference field The size of the moment of light to find the reading phase of the value. This method