Aberration resistant axial localization using a self-imaging of vortices

Aberration resistant axial localization using a self-imaging of vortices

The vortex self-imaging (SI) implemented in optical imaging systems and its usage for a robust axial localization of point-like objects are presented. The vortex SI is used to generate a double-helix point spread function (DH PSF) maintaining its shape and size unchanged in a large working area. The...

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Veröffentlicht in:Optics express 2015-06, Vol.23 (12), p.15316-15331
Hauptverfasser: Baránek, Michal, Bouchal, Petr, Šiler, Martin, Bouchal, Zdeněk
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container_issue 12
container_start_page 15316
container_title Optics express
container_volume 23
creator Baránek, Michal
Bouchal, Petr
Šiler, Martin
Bouchal, Zdeněk
description The vortex self-imaging (SI) implemented in optical imaging systems and its usage for a robust axial localization of point-like objects are presented. The vortex SI is used to generate a double-helix point spread function (DH PSF) maintaining its shape and size unchanged in a large working area. The robustness of the axial localization is demonstrated by a resistance against the spherical aberration. Using a thorough analysis, the experiments are optimized to achieve the highest localization sensitivity and to find a trade-off between the aberration stability of the DH PSF, the length of the localization range and the energy efficiency. The benefits of the method are achieved by applying the SI of nondiffracting vortices prepared by a spatial light modulator (SLM). The feasibility of the proposed technique is demonstrated by a defocusing induced rotation of the fixed and moving 1μm polystyrene beads, carried out in the transmitted light illumination.
doi_str_mv 10.1364/OE.23.015316
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title Aberration resistant axial localization using a self-imaging of vortices
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