Quantitative determination of the optical properties of phase objects by using a real-time phase retrieval technique

Johannes Frank; Guenther Wernicke; Jan Matrisch; Sebastian Wette; Jan Beneke; Stefan Altmeyer

doi:10.1117/12.889340

26 May 2011 Quantitative determination of the optical properties of phase objects by using a real-time phase retrieval technique

Johannes Frank, Guenther Wernicke, Jan Matrisch, Sebastian Wette, Jan Beneke, Stefan Altmeyer

Author Affiliations +

Proceedings Volume 8082, Optical Measurement Systems for Industrial Inspection VII; 80820N (2011) https://doi.org/10.1117/12.889340
Event: SPIE Optical Metrology, 2011, Munich, Germany

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.

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Johannes Frank, Guenther Wernicke, Jan Matrisch, Sebastian Wette, Jan Beneke, and Stefan Altmeyer "Quantitative determination of the optical properties of phase objects by using a real-time phase retrieval technique", Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80820N (26 May 2011); https://doi.org/10.1117/12.889340

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