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激光散斑干涉测量
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激光散斑干涉测量
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激光散斑干涉测量
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laser speckle interfer
激光散斑干涉测量
当激光照射粗糙表面时,漫散射光在物体表面前方相遇而产生干涉,形成散斑场,利用光电探测器接受散斑干涉信号,当物体表面发生刚体位移或弹性变形时,通过比较物体变形前后散斑的变化,从而测得物体各部分的位移或应变,称为散斑干涉测量。
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