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Proceedings Paper

Rotating point spread function in spiral phase contrast imaging with discrete phase modulation
Author(s): M. Baránek; Z. Bouchal
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Paper Abstract

Spiral phase contrast imaging is one of the modern methods of optical microscopy applicable to edge contrast enhancement of amplitude and phase samples. The method is based on a spatial spectrum filtering realized by a spiral phase element at the focal plane of the Fourier lens. In this paper, the results of a paraxial wave model of the spiral imaging are presented which allow to calculate the point spread function for real parameters of the spiral filtering and to analyze defocusing effects. A particular attention is given to the analysis of the spiral imaging implemented by a phase mask with a finite number of discrete phase levels. As the main result, a defocusing-induced rotation of the point spread function is discovered and analyzed in detail. Theoretical predictions are verified in experiments using a spatial light modulator for generation of the discrete spiral phase mask.

Paper Details

Date Published: 18 December 2012
PDF: 8 pages
Proc. SPIE 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 86970Q (18 December 2012); doi: 10.1117/12.2007028
Show Author Affiliations
M. Baránek, Palacký Univ. Olomouc (Czech Republic)
Z. Bouchal, Palacký Univ. Olomouc (Czech Republic)

Published in SPIE Proceedings Vol. 8697:
18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Jan Peřina Jr.; Libor Nozka; Miroslav Hrabovský; Dagmar Senderáková; Waclaw Urbańczyk; Ondrej Haderka; Libor Nožka, Editor(s)

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