Imaging in laser spectroscopy by a single-pixel camera based on speckle patterns

0469303 - ÚFP 2017 RIV US eng C - Conference Paper (international conference)
Žídek, Karel - Václavík, Jan
Imaging in laser spectroscopy by a single-pixel camera based on speckle patterns.
Proceedings of SPIE 10151, Optics and Measurement International Conference 2016. Vol. 10151. Bellingham: SPIE, Society of Photo-Optical Instrumentation Engineers, 2016 - (Kovačičinová, J.), č. článku 1015105. SPIE. ISBN 978-1-5106-0753-8. ISSN 0277-786X.
[OAM 2016, Optics and Measurement International Conference 2016. Liberec (CZ), 11.10.2016-14.10.2016]
R&D Projects: GA MŠMT(CZ) LO1206
Institutional support: RVO:61389021
Keywords : single-pixel camera * compressed sensing * random pattern generation * photoluminescence imaging * speckle pattern
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
http://dx.doi.org/10.1117/12.2256988

Complex devices and relay optics are commonly used for the purpose. We present a new approach of creating the random mask by using laser speckles from coherent laser light passing through a diffusor. This concept is especially powerful in laser spectroscopy, where it does not require any complicated modification of the current techniques. The main advantage consist in the unmatched simplicity of the random pattern generation and a versatility of the pattern resolution. Unlike in the case of commonly used random masks, here the pattern fineness can be adjusted by changing the laser spot size being diffused. We demonstrate the pattern tuning together with the connected changes in the pattern statistics. In particular, the issue of patterns orthogonality, which is important for the CS applications, is discussed. Finally, we demonstrate on a set of 200 acquired speckle patterns that the concept can be successfully employed for single-pixel camera imaging. We discuss requirements on detector noise for the image reconstruction.
Permanent Link: http://hdl.handle.net/11104/0267147