Open AccessQuantitative phase imaging method based on an analytical nonparaxial partially coherent phase optical transfer function
Author(s) -
Yijun Bao,
Thomas K. Gaylord
Publication year - 2016
Publication title -
journal of the optical society of america. a, optics, image science, and vision./journal of the optical society of america. a, online
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.803
H-Index - 158
eISSN - 1520-8532
pISSN - 1084-7529
DOI - 10.1364/josaa.33.002125
Subject(s) - paraxial approximation , optics , phase (matter) , physics , optical transfer function , computation , phase retrieval , transfer function , spatial frequency , computer science , algorithm , fourier transform , quantum mechanics , beam (structure) , electrical engineering , engineering
Multifilter phase imaging with partially coherent light (MFPI-PC) is a promising new quantitative phase imaging method. However, the existing MFPI-PC method is based on the paraxial approximation. In the present work, an analytical nonparaxial partially coherent phase optical transfer function is derived. This enables the MFPI-PC to be extended to the realistic nonparaxial case. Simulations over a wide range of test phase objects as well as experimental measurements on a microlens array verify higher levels of imaging accuracy compared to the paraxial method. Unlike the paraxial version, the nonparaxial MFPI-PC with obliquity factor correction exhibits no systematic error. In addition, due to its analytical expression, the increase in computation time compared to the paraxial version is negligible.