Abstract
A transport-of-intensity equation (TIE)-based phase retrieval method is proposed with putting an arbitrarily shaped aperture into the optical wavefield. In this arbitrarily shaped aperture, the TIE can be solved under nonuniform illuminations and even nonhomogeneous boundary conditions by iterative discrete cosine transforms with a phase compensation mechanism. Simulation with arbitrary phase, arbitrary aperture shape, and nonuniform intensity distribution verifies the effective compensation and high accuracy of the proposed method. Experiment is also carried out to check the feasibility of the proposed method in real measurement. Comparing to the existing methods, the proposed method is applicable for any types of phase distribution under nonuniform illumination and nonhomogeneous boundary conditions within an arbitrarily shaped aperture, which enables the technique of TIE with hard aperture to become a more flexible phase retrieval tool in practical measurements.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Chao Zuo, Qian Chen, and Anand Asundi
Opt. Express 22(8) 9220-9244 (2014)
Jialin Zhang, Qian Chen, Jiasong Sun, Long Tian, and Chao Zuo
Opt. Lett. 45(13) 3649-3652 (2020)
Wei-Shuo Li, Chun-Wei Chen, Kuo-Feng Lin, Hou-Ren Chen, Chih-Ya Tsai, Chyong-Hua Chen, and Wen-Feng Hsieh
Opt. Lett. 41(7) 1616-1619 (2016)