Phase shifting technique has been widely applied in the interferogram processing. 摘要相移技术在干涉图处理中应用较为广泛。
The original phase of the interferogram is changed slowly or rapidly with the optical path difference changed, and the phase error is different too. 干涉图中初相位因子随光程差改变缓慢变化或快速变化，对相位误差的影响也不全相同。
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