Zhou Haowen, Stoykova Elena, Hussain Mallik, Banerjee Partha P
Appl Opt. 2021 Feb 1;60(4):A73-A83. doi: 10.1364/AO.404390.
The performance of direct and unwrapped phase retrieval, which combines digital holography with the transport of intensity, is examined in detail in this paper. In this technique, digital holography is used to numerically reconstruct the intensities at different planes around the image plane, and phase retrieval is achieved by the transport of intensity. Digital holography with transport of intensity is examined for inline and off-axis geometries. The effect of twin images in the inline case is evaluated. Phase-shifting digital holography with transport of intensity is introduced. The performance of digital holography with transport of intensity is compared with traditional off-axis single- and dual-wavelength techniques, which employ standard phase unwrapping algorithms. Simulations and experiments are performed to determine and compare the accuracy of phase retrieval through a mean-squared-error figure of merit as well as the computational speeds of the various methods.
本文详细研究了将数字全息术与强度传输相结合的直接和展开相位恢复的性能。在该技术中，数字全息术用于对图像平面周围不同平面的强度进行数值重建，而相位恢复则通过强度传输来实现。研究了强度传输的数字全息术的同轴和离轴几何结构。评估了同轴情况下孪生像的影响。介绍了强度传输的相移数字全息术。将强度传输的数字全息术的性能与采用标准相位展开算法的传统离轴单波长和双波长技术进行了比较。通过均方误差品质因数以及各种方法的计算速度进行了模拟和实验，以确定和比较相位恢复的精度。
