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Proceedings Paper

Quantitative determination of the optical properties of phase objects by using a real-time phase retrieval technique
Author(s): Johannes Frank; Guenther Wernicke; Jan Matrisch; Sebastian Wette; Jan Beneke; Stefan Altmeyer
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Paper Abstract

The transport-of-intensity equation (TIE) describes a deterministic relation between the intensity distribution in different focal planes and the corresponding phase distribution. A Green's function solution of the TIE is used to retrieve the phase distribution of an object considering specific boundary conditions. This leads to an accurate reconstruction of the properties of phase objects, e.g. the refractive indices and thus the numerical aperture (NA) of optical fibers. The required intensity distributions are captured simultaneously by the use of a multi-camera microscope. The TIE is solved using a computer algorithm, which can be massively parallelized. This offers the application of general purpose computation on graphics processing units (GPGPU). Therefore real-time reconstruction of the phase distribution is possible.

Paper Details

Date Published: 26 May 2011
PDF: 9 pages
Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80820N (26 May 2011); doi: 10.1117/12.889340
Show Author Affiliations
Johannes Frank, Cologne Univ. of Applied Sciences (Germany)
Humboldt-Univ. zu Berlin (Germany)
Guenther Wernicke, Humboldt-Univ. zu Berlin (Germany)
Jan Matrisch, RheinAhrCampus Remagen (Germany)
Sebastian Wette, Cologne Univ. of Applied Sciences (Germany)
Jan Beneke, Cologne Univ. of Applied Sciences (Germany)
Stefan Altmeyer, Cologne Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 8082:
Optical Measurement Systems for Industrial Inspection VII
Peter H. Lehmann; Wolfgang Osten; Kay Gastinger, Editor(s)

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