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13 October 2006 A compact aerosol sensor and spectroscopic sorting with UV LEDs
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kristina M. Davitt, Yoon-Kyu Song, William R. Patterson III, Arto V. Nurmikko, Yong-Le Pan, Richard K. Chang, Maria Gherasimova, Jung Han, Patrick J. Cobler, Paul D. Butler, Vincent Palermo, and Remis Gaska "A compact aerosol sensor and spectroscopic sorting with UV LEDs", Proc. SPIE 6398, Optically Based Biological and Chemical Detection for Defence III, 63980B (13 October 2006);


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