Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns

Abstract We propose and demonstrate a spectrally-resolved photoluminescence imaging setup based on the so-called single pixel camera – a technique of compressive sensing, which enables imaging by using a single-pixel photodetector. The method relies on encoding an image by a series of random pattern...

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Autores principales:	Karel Žídek, Ondřej Denk, Jiří Hlubuček
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/91316c87a48c4fb5af10e4f79d261628
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spelling	oai:doaj.org-article:91316c87a48c4fb5af10e4f79d2616282021-12-02T15:06:22ZLensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns10.1038/s41598-017-14443-42045-2322https://doaj.org/article/91316c87a48c4fb5af10e4f79d2616282017-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-14443-4https://doaj.org/toc/2045-2322Abstract We propose and demonstrate a spectrally-resolved photoluminescence imaging setup based on the so-called single pixel camera – a technique of compressive sensing, which enables imaging by using a single-pixel photodetector. The method relies on encoding an image by a series of random patterns. In our approach, the image encoding was maintained via laser speckle patterns generated by an excitation laser beam scattered on a diffusor. By using a spectrometer as the single-pixel detector we attained a realization of a spectrally-resolved photoluminescence camera with unmatched simplicity. We present reconstructed hyperspectral images of several model scenes. We also discuss parameters affecting the imaging quality, such as the correlation degree of speckle patterns, pattern fineness, and number of datapoints. Finally, we compare the presented technique to hyperspectral imaging using sample scanning. The presented method enables photoluminescence imaging for a broad range of coherent excitation sources and detection spectral areas.Karel ŽídekOndřej DenkJiří HlubučekNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Karel Žídek Ondřej Denk Jiří Hlubuček Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
description	Abstract We propose and demonstrate a spectrally-resolved photoluminescence imaging setup based on the so-called single pixel camera – a technique of compressive sensing, which enables imaging by using a single-pixel photodetector. The method relies on encoding an image by a series of random patterns. In our approach, the image encoding was maintained via laser speckle patterns generated by an excitation laser beam scattered on a diffusor. By using a spectrometer as the single-pixel detector we attained a realization of a spectrally-resolved photoluminescence camera with unmatched simplicity. We present reconstructed hyperspectral images of several model scenes. We also discuss parameters affecting the imaging quality, such as the correlation degree of speckle patterns, pattern fineness, and number of datapoints. Finally, we compare the presented technique to hyperspectral imaging using sample scanning. The presented method enables photoluminescence imaging for a broad range of coherent excitation sources and detection spectral areas.
format	article
author	Karel Žídek Ondřej Denk Jiří Hlubuček
author_facet	Karel Žídek Ondřej Denk Jiří Hlubuček
author_sort	Karel Žídek
title	Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
title_short	Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
title_full	Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
title_fullStr	Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
title_full_unstemmed	Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns
title_sort	lensless photoluminescence hyperspectral camera employing random speckle patterns
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/91316c87a48c4fb5af10e4f79d261628
work_keys_str_mv	AT karelzidek lenslessphotoluminescencehyperspectralcameraemployingrandomspecklepatterns AT ondrejdenk lenslessphotoluminescencehyperspectralcameraemployingrandomspecklepatterns AT jirihlubucek lenslessphotoluminescencehyperspectralcameraemployingrandomspecklepatterns
_version_	1718388462325858304

Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns

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