Kulkarni Rishikesh, Rastogi Pramod
J Opt Soc Am A Opt Image Sci Vis. 2014 Sep 1;31(9):1919-22. doi: 10.1364/JOSAA.31.001919.
A computationally efficient technique for fringe analysis in digital holographic interferometry using a difference equation representation of the interference field is presented. The spatially varying coefficient of the difference equation is estimated accurately by constraining it in the subspace spanned by the linearly independent basis functions. The coefficient estimated provides an accurate estimation of the interference phase derivative and enables the linear estimation of the interference field. Thereupon, the interference phase is estimated using a simple unwrapping algorithm. The performance of the proposed method is validated with the help of simulation and experimental results.
提出了一种计算效率高的技术，用于数字全息干涉术中的条纹分析，该技术使用干涉场的差分方程表示。通过将差分方程的空间变化系数约束在由线性独立基函数所张成的子空间中，可精确估计该系数。所估计的系数能准确估计干涉相位导数，并实现干涉场的线性估计。随后，使用一种简单的解包裹算法估计干涉相位。借助模拟和实验结果验证了所提方法的性能。
