基于相位恢复技术的二维相位解包络算法

介绍一种新型的二维相位解包络算法。该算法的原理是将被解包络的相位作为输入光场,通过光学衍射计算得到其远场衍射光场的光强分布,然后使用相位恢复算法进行优化计算,得到一组用于表达连续波面的最佳Zernike多项式参数。此算法的特点在于,结合已成熟的相位恢复算法,波面解包络的唯一性和准确性可得到充分的保证;同时利用光场衍射计算,可方便地通过对衍射光强的滤波实现对相位噪声的抑制。实验验证了该算法的有效性。

Two Dimensional Phase Unwrapping Algorithm Based on Phase Retrieval

A novel two-dimensional phase unwrapping method is proposed.In this idea,the phase wrapped is propagated through an optical diffraction calculation as an input optical field and transformed into the intensity distribution.Then the phase retrieval algorithm is engaged in order to find the best fitting Zernike polynomials for the unwrapped phase based on the diffraction intensity.Because of the maturity of phase retrieval theory,the uniqueness and accuracy of phase unwrapping can be guaranteed.As a result,the phase noise can be remarkably reduced by intensity filtering.The validity of this algorithm is verified by experiment.