Common-path intrinsically achromatic optical diffraction tomography
| Autor: | Krzysztof Patorski, Maciej Trusiak, Malgorzata Kujawinska, Michał Ziemczonok, Michal Jozwik, Paweł Gocłowski, Julianna Winnik, Piotr Zdańkowski |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Diffraction 0303 health sciences Tomographic reconstruction business.industry Holography Physics::Optics Superluminescent diode 01 natural sciences Atomic and Molecular Physics and Optics Article law.invention 010309 optics Lens (optics) 03 medical and health sciences Interferometry Optics law Achromatic lens 0103 physical sciences business Diffraction grating 030304 developmental biology Biotechnology |
| Zdroj: | Biomed Opt Express |
| ISSN: | 2156-7085 |
| Popis: | 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 –1st and +1st 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. |
| Databáze: | OpenAIRE |
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