Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik. Bishop, Jason C. Isaacs, SPIE - International Society for Optical Engineering,artikel-id Konferensbidrag, Publicerat paper Refereegranskat Abstract [en] Imaging Raman spectroscopy based on tunable filters is an established technique for detecting single explosives particles at stand-off distances. The use of digital micromirror devices DMD and compressive sensing CS in imaging Raman explosives trace detection can improve light throughput and add significant flexibility compared to existing systems.
DMDs are based on mature microelectronics technology, and are compact, scalable, and can be customized for specific tasks, including new functions not available with current technologies.
This paper has been focusing on investigating how a DMD can be used when applying CS-based imaging Raman spectroscopy on stand-off explosives trace detection, and evaluating the performance in terms of light throughput, image reconstruction ability and potential detection limits.
This type of setup also gives the possibility to combine imaging Raman with non-spatially resolved fluorescence suppression techniques, such as Kerr gating.
Initial results for compressive sensing imaging Raman shows a stable reconstruction procedure even at low signals and in presence of interfering background signal. It is also shown to give increased effective light transmission without sacrificing molecular specificity or area coverage compared to single i östmark based imaging Raman. At the same time vist dating site adds flexibility so the setup can be customized for new functionality.