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UV Raman chemical imaging using compressed sensing
Umeå University, Faculty of Science and Technology, Department of Physics. Defence and Security, Systems and Technology, Norra Sorunda, Swedish Defence Research Agency (FOI), Sweden.
CBRN Defence and Security, Umeå, Swedish Defence Research Agency (FOI), Sweden.
2019 (English)In: The Analyst, ISSN 0003-2654, E-ISSN 1364-5528, Vol. 144, no 5, p. 1513-1518Article in journal (Refereed) Published
Abstract [en]

Different chemical (hyperspectral) imaging techniques have proven to be powerful tools to provide and illustrate insightful data within a broad range of research areas. The present communication includes proof-of-principle results of UV Raman hyperspectral imaging, achieved via compressed sensing measurements using coded apertures (CA) and a reconstruction algorithm. The simple and cheap CA set up, obtained by a 50% overall transmissive random binary mask (chromium on fused silica with 100 m x 100 m pixel size) positioned at the entrance plane of an imaging spectrograph, resulted in an overall high throughput for the UV region of interest. The mask was mounted on a translation stage, allowing reproducible switching to different CA, thus making possible for multi frame CA imaging. Results from a scene containing liquid droplets are shown as examples and, as expected, qualitative improvements in resolution and contrast could be observed in both the spatial and spectral domain as the number of CA frames was increased.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2019. Vol. 144, no 5, p. 1513-1518
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-157961DOI: 10.1039/c9an00056aISI: 000461614000003PubMedID: 30741306OAI: oai:DiVA.org:umu-157961DiVA, id: diva2:1305291
Available from: 2019-04-16 Created: 2019-04-16 Last updated: 2019-04-16Bibliographically approved

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Nordberg, Markus

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