Imperial College London
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Dr Ali K. Yetisen

Faculty of Engineering, Department of Chemical Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5562a.yetisen Website

 
 
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Location

 

507ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dong:2020:10.1063/5.0019209,
author = {Dong, J and Yetisen, AK and Dong, X and Poller, F and Jakobi, M and Liu, Z and Bloise, FS and Koch, AW},
doi = {10.1063/5.0019209},
journal = {Applied Physics Letters},
title = {Low-pass filtering compensation in common-path digital holographic microscopy},
url = {http://dx.doi.org/10.1063/5.0019209},
volume = {117},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A low-pass filtering compensation (LPFC) method is proposed to compensate for phase aberrations in point diffraction-based common-path digital holographic microscopy. This method estimates the phase aberration from the object hologram by Fourier transform and low-pass spatial filtering. The estimated phase aberration is subtracted from the object phase image to achieve single-hologram phase compensation. The accuracy and capability of LPFC for phase compensation were demonstrated by experiments on a Ronchi grating and a human blood smear. LPFC provides phase compensation for both smooth objects and objects containing abrupt edges, in the special case of a system with relatively high-frequency objects and low-frequency slight phase aberrations. LPFC operates without the need for fitting procedures, iterative steps, or prior knowledge of the optical parameters, which substantially simplifies the process of phase compensation in quantitative phase imaging.Digital holographic microscopy (DHM) has been developed for a wide range of applications in the examination of cell pathophysiology,1,2 semiconductors,3 and 2D materials.4 Common-path DHM combines common-path geometry and off-axis holography, and hence, it provides subnanometer level optical phase delay (OPD) imaging with high temporal stability and the acquisition speed is limited only by the detector.5–8 Point diffraction-based common-path DHM uses a spatial filter to generate holograms with uniform reference fields, resulting in a compact system with a full field of view (FOV).9–13 In these setups, the zeroth-order beam is low-pass filtered by a pinhole in the Fourier plane of the spatial filtering lens, which is generally assumed to be a uniform field at the surface of the image sensor.11,13 However, due to the use of a microscope objective (MO) and the complex spatial filter, or a non-optimal imaging system, the zeroth-order beam can be distorted, which introduces phase aberrations to the original off
AU  - Dong,J
AU  - Yetisen,AK
AU  - Dong,X
AU  - Poller,F
AU  - Jakobi,M
AU  - Liu,Z
AU  - Bloise,FS
AU  - Koch,AW
DO  - 10.1063/5.0019209
PY  - 2020///
SN  - 0003-6951
TI  - Low-pass filtering compensation in common-path digital holographic microscopy
T2  - Applied Physics Letters
UR  - http://dx.doi.org/10.1063/5.0019209
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000576357000001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://aip.scitation.org/doi/10.1063/5.0019209
UR  - http://hdl.handle.net/10044/1/96853
VL  - 117
ER  -
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