Focal plane speckle patterns for compressive microskopic imaging in laser spectroscopy

0499468 - ÚFP 2019 RIV DE eng C - Conference Paper (international conference)
Žídek, Karel
Focal plane speckle patterns for compressive microskopic imaging in laser spectroscopy.
Eurasip 2018. Berlín: Eurasip, 2018, č. článku A7. ISBN 978-90-827970-0-8.
[5th International Workshop on Compressed Sensing applied to Radar, Multimodal Sensing, and Imaging. Siegen (DE), 10.09.2018-13.09.2018]
R&D Projects: GA MŠMT(CZ) LO1206
Institutional support: RVO:61389021
Keywords : laser speckle pattern * lens focal plane * random pattern correlation * compressive imaging
OECD category: Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)
https://www.eurasip.org/Proceedings/Ext/CoSeRa2018/papers/p-zidek.pdf

Speckle patterns arise due to interference of many coherent wavefronts with random phases. The patterns can serve as a means of random encoding of scenes for compressive imaging in laser spectroscopy, as is has been demonstrated for the far-field speckles. However, the use of far-field speckle patterns limits resolution of the imaging. Here we present a study of speckle patterns in the proximity of the focal plane of a lens, which can provide an access to speckle patterns on the micrometer scale. We demonstrate the possibility to obtain a scaled-up reference pattern and we also investigate correlation between speckle patterns in different positions close to the focal plane. Finally, we demonstrate single-pixel hyperspectral imaging based on focal plane speckles and discuss their other possible applications.
Permanent Link: http://hdl.handle.net/11104/0295363