The fast shadow photograph system with three-sequence laser sparking is supposed for the first time.During the exposure time of the CCD camera,the pulsed laser sparks three times in sequence to emit ultra-short laser and three shadow images of the moving object at three different positions will be captured in one image frame.So one of this photograph station can achieve the function of three traditional photograph stations.And it can solve the problem of the space limitation for setting many stations in nut...