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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
A. K. Gupta, N. K. Nishchal, and P. P. Banerjee 
Corresponding Authors:
N. K. Nishchal 
DOI #:
https://doi.org/10.1364/OSAC.383527 
Title:
Transport of intensity equation based photon counting phase imaging 
Journal:
OSA Continuum  
Year:
2020 
Volume:
Page:
236-245 
Keywords:
photon counting phase imaging 
Abstract:
In low light conditions, such as in astronomy and non-invasive bio-imaging applica-tions, the imaging performance is mostly degraded due to noise. In this paper, we demonstrate a transport of intensity equation based technique that uses photon-counting phase imaging. To achieve the phase imaging in a photon starved condition, a method proposed by Paganin et al. [J. Micros. 214, 51 (2004)] has been used. The method uses the fact that the magnitude of the wavefront curvature determines the quality of the recovered phase image for a given noise level and defocus distance. The effectiveness of the proposed method has been illustrated through simulations and experimental results using inexpensive partially coherent illumination. The study can find applications in non-invasive phase imaging. 
Entered by:
Venkata Dantham on 2020-08-03 
 
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