Reconstruction errors and stagnation in iterative phase retrieval have been alleviated with the use of random illumination carried out using phase diffusers. Traditionally implemented using photoresist plates or phase-type light modulators, phase diffusers are wavelength-specific, thus, severely limiting their applications. In this study, a technique for phase retrieval based on amplitude modulation using a digital micromirror device is demonstrated through simulations and experiments. Effects of diffuser element size and sampling region are investigated with smaller binning and regions close to the diffuser resulting in enhanced reconstructions. The technique can be applied in the investigations of various wavelength-selective biological samples.

通过使用相位漫射器进行随机照明，迭代相位检索中的重建错误和停滞已得到缓解。传统上使用光刻胶板或相位型光调制器实现，相位漫射器是特定于波长的，因此严重限制了它们的应用。在这项研究中，通过模拟和实验展示了一种基于幅度调制的相位检索技术，使用数字微镜装置。使用较小的分箱和靠近扩散器的区域来研究扩散器元件尺寸和采样区域的影响，从而增强重建。该技术可应用于各种波长选择性生物样品的研究。