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18 August 2018 Arbitrary phase shifting in diffraction common path interferometry
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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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fatemeh HadavandMirzaee, Desmond Williams, Thomas Suleski, and Rosario Porras-Aguilar "Arbitrary phase shifting in diffraction common path interferometry", Proc. SPIE 10749, Interferometry XIX, 107490V (18 August 2018);

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