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Proceedings Paper

Arbitrary phase shifting in diffraction common path interferometry
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Paper Abstract

Quantitative phase imaging (QPI) has made a tremendous contribution to microbiology and medicine. Recently, QPI has been used for in-vitro fertilization optimization, and cell culture monitoring, among others. These accomplishments have been made using phase measurements. QPI is based on well-known optical metrology techniques. The challenge in QPI is developing phase measuring systems that can be used in the medical or microbiological environment. For such applications, two-beam interferometers are not suitable. In this context, we propose a common path interferometric system that provides quantitative phase measurements. The method combines the diffraction phase microscopy with the arbitrary phase shifting technique. The phase-shifted images are obtained by means of a shifted diffraction grating and an amplitude filter that allows interference between the undiffracted light and the first spatial frequency at the Fourier plane. The results show a reduction in the noise of the resultant phase when using the arbitrary phase shifting technique. This system can potentially be used to quantify nanoscale motions in living cells.

Paper Details

Date Published: 18 August 2018
PDF: 6 pages
Proc. SPIE 10749, Interferometry XIX, 107490V (18 August 2018); doi: 10.1117/12.2320856
Show Author Affiliations
Fatemeh HadavandMirzaee, The Univ. of North Carolina at Charlotte (United States)
Desmond Williams, The Univ. of North Carolina at Charlotte (United States)
Thomas Suleski, The Univ. of North Carolina at Charlotte (United States)
Rosario Porras-Aguilar, The Univ. of North Carolina at Charlotte (United States)

Published in SPIE Proceedings Vol. 10749:
Interferometry XIX
Katherine Creath; Jan Burke; Michael B. North Morris; Angela D. Davies, Editor(s)

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