Asian Journal of Physics Vol 31, Nos 11 & 12 (2022) 1117-1128

Combining digital holography and transport of intensity equation for quantitative phase imaging: a review

Ram Kumar1, Naveen K Nishchal1, and Kehar Singh2
1Department of Physics, Indian Institute of Technology Patna, Bihta, Patna-801 106, Bihar, India
2Optics and Photonics Center, Indian Institute of Technology Delhi, New Delhi-110 016, India

Dedicated to Professor Partha Banerjee for his enormous contributions to the advancement of research
and education in holography through his unique vision and outstanding dedication

Recent advances in the field of digital sensors and computational facilities have turned digital holography (DH) into a powerful tool for many applications such as quantitative phase imaging, optical metrology, evaluation of cell parameters, optical cryptography, and optical pattern recognition among others. The transport of intensity equation (TIE) is one of the deterministic phase-retrieval methods, which does not use interferometric geometry. In this method, the phase is calculated directly from a set of intensities rather than iteratively approximating a solution. Recently, use of the TIE in the DH reconstruction process has been reported as a phase-retrieval method. Combining both DH and TIE provides better solution to the phase-retrieval. Refocusing property of the DH helps exploit the translation issue of digital sensor along the optical axis while capturing the intensity distributions at different depths. The issue of phase unwrapping is solved through the use of TIE. Hence, both the methods complement each other. In this paper, we review briefly the applicability of the combination of DH with TIE. © Anita Publications. All rights reserved.
Keywords: Digital holography, Transport of intensity equation, Quantitative phase imaging, Interferometry.

DOI: 10.54955.AJP.31.11-12.2022.1117-1128

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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