Opt Lett. 2018 Jul 1;43(13):3033-3036. doi: 10.1364/OL.43.003033.
A fast and accurate wavefront reconstruction method for two-frame phase-shifting interferometry is proposed. The unknown phase step between the two interferograms is estimated directly by solving a quartic polynomial equation, and then the phase map is readily reconstructed after obtaining the phase step. The whole phase reconstruction process is nearly analytical and thus very fast and easy to realize. Good performance of the proposed method is demonstrated by reconstructing the phase maps from simulated and real fringes along with comparisons to several existing well-established algorithms.
提出了一种用于两帧相移干涉测量的快速准确的波前重建方法。通过求解四次多项式方程直接估计两个干涉图之间的未知相移步长，然后获得相移步长后即可轻松重建相位图。整个相位重建过程几乎是解析的，因此速度非常快，易于实现。通过对模拟和实际条纹的相位图进行重建，并与几种现有的成熟算法进行比较，验证了该方法的良好性能。
