zero-path-difference rainbow holography 零光程差法彩虹全息术
zero optical path difference 零光程差位置
The experiments show that the positioning accuracy of extrapolation method for zero optical path difference point of fiber quasi-white interference signal is less than 0.5 interference fringes.
实验表明，采用该方法对光纤准白光干涉信号零光程差位置的定位精度优于0.5个干涉条纹。
The centrobaric method was used to determine the position with the maximum modulation value of fringes and the position was used as the point of zero light path difference.
采用重心法确定干涉条纹调制度的最大值位置，并以此作为零光程差位置。
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