Li S W, Aruga T
Appl Opt. 1992 Feb 1;31(4):560-7. doi: 10.1364/AO.31.000560.
An optical technique to detect the velocity of a moving object that has a brightness distribution is presented. We show theoretically and experimentally that the amplitude of the detected signal in transmission-grating velocimetry is proportional to the Fourier component of the object spectrum at the spatial frequency of the grating. This fact can be used advantageously to sense the velocities of moving objects of any shape in one pass through the detector's field of view. Results of the application of this method to measure the velocities of some common outdoor moving objects are also presented.
提出了一种用于检测具有亮度分布的运动物体速度的光学技术。我们通过理论和实验表明，透射光栅测速法中检测信号的幅度与物体光谱在光栅空间频率处的傅里叶分量成正比。这一事实可有利地用于在单次穿过探测器视场时感测任何形状运动物体的速度。还给出了该方法应用于测量一些常见户外运动物体速度的结果。
