Real time interferometric microscopy in liquids

Jobin, Marc (School of Engineering, Architecture and Landscape (hepia), HES-SO // University of Applied Sciences Western Switzerland) ; Foschia, Raphael (School of Engineering, Architecture and Landscape (hepia), HES-SO // University of Applied Sciences Western Switzerland)

We have made a Phase Shift Mode Interferometric Optical Microscope (PSM-IOM) operating in liquid and in real time (video rate). We thus implemented for IOM two of the widely accepted basic advantages of Digital Holography Microscopy. Using a modified Tolansky objective to compensate the phase shift from the liquid cell window, we can measure without immersing any part of the microscope objective. The fringe visibility was reduced by 14% in water compared to air. In order to follow surface nano-topography at video rate, we have implemented a Fourier Transform based algorithm which computes the phase map from a single interferogram. A comparison to the Hariharan algorithm is given. As a proof of concept, the nano-evolution of a surface profile of Cu in sulphuric acid is shown.


Keywords:
Conference Type:
short paper
Faculty:
Ingénierie et Architecture
School:
HEPIA - Genève
Institute:
inSTI - Institut des Sciences et Technologies industrielles
Publisher:
Miami, FL, USA, 11-14 April 2010
Date:
2010-04
Miami, FL, USA
11-14 April 2010
Pagination:
3 p.
Published in:
Proceedings of Biomedical Optics 2010, 11-14 April 2010, Miami, Florida, United States
DOI:
ISBN:
978-1-55752-887-2
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-05-29, last modified 2020-06-26

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