Open AccessCommon-path intrinsically achromatic optical diffraction tomography
Author(s) -
Piotr Zdańkowski,
Julianna Winnik,
Krzysztof Patorski,
Paweł Gocłowski,
Michał Ziemczonok,
Michał Jóźwik,
Małgorzata Kujawińska,
Maciej Trusiak
Publication year - 2021
Publication title -
biomedical optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.428828
Subject(s) - achromatic lens , optics , diffraction , physics , interferometry , optical coherence tomography , holography , laser , diffraction grating , optical path , lens (geology) , optical path length , superluminescent diode
In this work we propose an open-top like common-path intrinsically achromatic optical diffraction tomography system. It operates as a total-shear interferometer and employs Ronchi-type amplitude diffraction grating, positioned in between the camera and the tube lens without an additional 4f system, generating three-beam interferograms with achromatic second harmonic. Such configuration makes the proposed system low cost, compact and immune to vibrations. We present the results of the measurements of 3D-printed cell phantom using laser diode (coherent) and superluminescent diode (partially coherent) light sources. Broadband light sources can be naturally employed without the need for any cumbersome compensation because of the intrinsic achromaticity of the interferometric recording (holograms generated by -1 st and +1 st conjugated diffraction orders are not affected by the illumination wavelength). The results show that the decreased coherence offers much reduced coherent noise and higher fidelity tomographic reconstruction especially when applied nonnegativity constraint regularization procedure.