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利用波带片条纹遮盖目标,用高速摄影机通过另一个透明波带片对其进行跟踪,为我们测量目标位移提供了一种极精确的方法。胶片的不平度,大气波动以及高速相机的振动也会影响莫尔条纹形状的变化。用这种方法较容易测量目标位置和方向的微小变化。
Covering the target with a strip of streak and tracking it with a high-speed camera through another transparent zone strip provides an extremely accurate method of measuring the target’s displacement. Film irregularities, atmospheric fluctuations and high-speed camera vibration will also affect the moiré fringe shape changes. This method makes it easier to measure small changes in the target’s position and orientation.