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Proceedings Paper

A compact aerosol sensor and spectroscopic sorting with UV LEDs
Author(s): Kristina M. Davitt; Yoon-Kyu Song; William R. Patterson; Arto V. Nurmikko; Yong-Le Pan; Richard K. Chang; Maria Gherasimova; Jung Han; Patrick J. Cobler; Paul D. Butler; Vincent Palermo; Remis Gaska
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Paper Abstract

We demonstrate a compact system incorporating a 32-element linear array of ultraviolet (UV) light-emitting diodes (LEDs) to the in-flight fluorescence detection of aerosolized particles. Custom electronics manage a standalone system and enable real-time processing of spectral data, which is used to cue a miniaturized aerodynamic deflector for physical particle separation. This front-end system improves the prospects for many second-stage analysis methods by reducing the background particle burden and providing a suspicious-particle enriched sample. The performance of UV LED arrays as an excitation source is established by the ability to detect emission from NADH and tryptophan in aerosol samples. On-the-fly fluorescence collection, operation of a real-time spectral algorithm, and aerosol concentration is demonstrated by separating particles that exhibit a specific spectral feature from a background of otherwise fluorescing particles.

Paper Details

Date Published: 13 October 2006
PDF: 9 pages
Proc. SPIE 6398, Optically Based Biological and Chemical Detection for Defence III, 63980B (13 October 2006); doi: 10.1117/12.687307
Show Author Affiliations
Kristina M. Davitt, Brown Univ. (United States)
Yoon-Kyu Song, Brown Univ. (United States)
William R. Patterson, Brown Univ. (United States)
Arto V. Nurmikko, Brown Univ. (United States)
Yong-Le Pan, Yale Univ. (United States)
Richard K. Chang, Yale Univ. (United States)
Maria Gherasimova, Yale Univ. (United States)
Jung Han, Yale Univ. (United States)
Patrick J. Cobler, Vtech Engineering Corp. (United States)
Paul D. Butler, Vtech Engineering Corp. (United States)
Vincent Palermo, Vtech Engineering Corp. (United States)
Remis Gaska, Sensor Electronic Technology Inc. (United States)

Published in SPIE Proceedings Vol. 6398:
Optically Based Biological and Chemical Detection for Defence III
John C. Carrano; Arturas Zukauskas, Editor(s)

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