A high-efficiency complex amplitude recovery method based on iterative multiple focus Yan Yu, Nan Li, Jipeng Huang, Qiulei Zhang, Juan Zhu, Jinhuan Li, Ning Li and Chunliang Wang Eur. Phys. J. Plus, 137 5 (2022) 556 Published online: 05 May 2022 DOI: 10.1140/epjp/s13360-022-02730-7