本文描述了一种实时全息干涉术,用四束邻近的细光束平行地照明物体表面某小区域内的四个点,这样,当物体发生运动时,从光探测器所接收到的光强信号中可同时得到物体该处的法向位移和倾斜。此方法不象通常的全息干涉术那样能获得位移的全场分布,但其独到之处在于能同时测量物体的法向位移及倾斜度。 In this paper, we describe a real-time holographic interferometry technique that uses four adjacent thin beams to illuminate four points in a small area on the surface of an object in parallel so that as the object moves, from the light intensity signal received by the photodetector This object can be obtained at the same time the normal displacement and tilt. This method does not obtain the full field distribution of displacement as the conventional holographic interferometry does, but its uniqueness lies in that it can simultaneously measure the normal displacement and the inclination of an object.