To achieve high measurement accuracy without the restriction of fringe number, a high-accuracy phase shifting retrieval approach based on phase shifts search (PSS) is proposed. Firstly, by setting the search conditions related to the phase shifts and using the PSS method to obtain the phase shifts between the phase shifting interferograms, subsequently, the phase distribution of the sample can be accurately obtained by using the obtained phase shifts. To our knowledge, the proposed method has the highest accuracy among the multi-step arbitrary phase shifting algorithms, and it is not limited to the number of fringes and the distribution of phase shifts between the interferograms. In the case of sparse fringes, the phase can still be retrieved with high accuracy, which proves that the proposed method is a high accuracy method with fewer constraints and wider applications. The feasibility and superiority of this method are proved by the simulation analysis and experiment.

中文翻译：

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基于相移搜索的高精度相移检索方法

为了实现不受条纹数限制的高测量精度，提出了一种基于相移搜索（PSS）的高精度相移检索方法。首先，通过设置与相移有关的搜索条件，并使用PSS方法获得相移干涉图之间的相移，随后，可以通过使用获得的相移来精确地获得样本的相分布。据我们所知，该方法在多步任意相移算法中具有最高的精度，并且不限于条纹数量和干涉图之间的相移分布。在稀疏条纹的情况下，仍然可以高精度地恢复相位，证明了该方法是一种约束少，应用范围广的高精度方法。通过仿真分析和实验证明了该方法的可行性和优越性。