Abstract

Numerical refocusing in any plane is one powerful feature granted by measuring both the amplitude and the phase of a coherent light beam. Here, we introduce a method based on the first Rytov approximation of scalar electromagnetic fields that (i) allows numerical propagation without requiring phase unwrapping after propagation and (ii) limits the effect of artificial phase singularities that appear upon numerical defocusing when the measurement noise is mixing with the signal. We demonstrate the feasibility of this method with both scalar electromagnetic field simulations and real acquisitions of microscopic biological samples imaged at high numerical aperture.

© 2018 Optical Society of America

Full Article  |  PDF Article
More Like This
Fast and accurate phase-unwrapping algorithm based on the transport of intensity equation

Juan Martinez-Carranza, Konstantinos Falaggis, and Tomasz Kozacki
Appl. Opt. 56(25) 7079-7088 (2017)

Wrapping-free phase retrieval with applications to interferometry, 3D-shape profiling, and deflectometry

César D. Perciante, Marija Strojnik, Gonzalo Paez, J. Matias Di Martino, Gastón A. Ayubi, Jorge L. Flores, and José A. Ferrari
Appl. Opt. 54(10) 3018-3023 (2015)

Fast digital refocusing and depth of field extended Fourier ptychography microscopy

Shaohui Zhang, Guocheng Zhou, Chuanjian Zheng, Tong Li, Yao Hu, and Qun Hao
Biomed. Opt. Express 12(9) 5544-5558 (2021)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics