Chen Lizhi, Tian Songzhi, Zhang Hao, Cao Liangcai, Jin Guofan
Opt Express. 2021 Apr 12;29(8):11645-11663. doi: 10.1364/OE.422115.
An iterative method with bandwidth constraint strategy is proposed to design phase holograms for high-quality speckle-free optical reconstruction. The bandwidth properties of the reconstructed field are analyzed theoretically based on the sampling theory, which helps in properly allocating the sampling resources for efficiently describing the speckles and artifacts in the reconstructed field. Iterative calculation with bandwidth constraint strategy of the reconstructed field and quadratic initial phase can optimize the phase hologram without stagnation problem, which provides effective controls of the reconstructed intensity fluctuations and helps to suppress the speckles and artifacts. Numerical and optical experiments have been performed to validate the proposed method can achieve excellent image fidelity.
提出了一种具有带宽约束策略的迭代方法来设计用于高质量无散斑光学重建的相位全息图。基于采样理论从理论上分析了重建场的带宽特性，这有助于合理分配采样资源，以有效描述重建场中的散斑和伪像。采用重建场和二次初始相位的带宽约束策略进行迭代计算，可以优化相位全息图而不会出现停滞问题，这能有效控制重建强度波动，并有助于抑制散斑和伪像。已进行了数值和光学实验，以验证所提出的方法能够实现出色的图像保真度。
