Title :
Stand-off detection of chemical analytes with passive chemo-sensing IR absorbers
Author :
Sieber, P.E. ; Bray, M.G. ; Bossard, J.A. ; Kovalev, A.E. ; Mayer, T.S. ; Werner, D.H.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
We present several designs for the infrared stand-off detection of passive chemo-sensing absorbers. Two absorbers are implemented as Salisbury Screen Absorbers (SSA) and the third design is implemented using a novel actuated Electromagnetic Band Gap (EBG) structure. Both approaches signal the presence of a chemical analyte via considerable changes in reflectivity. This change is subsequently detected by a thermal imaging camera which operates in the 8-12μm range. In addition to the ease of implementation that results from using ambient lighting, our designs feature a large contrast between states, scalability for long stand-off distances and a wide field of view (FOV). Both designs types are optimized for best performance via a Genetic Algorithm (GA).
Keywords :
chemical analysis; genetic algorithms; image sensors; infrared detectors; infrared imaging; photonic band gap; EBG structure; FOV; SSA; Salisbury screen absorbers; chemical analytes stand-off detection; electromagnetic band gap structure; field of view; genetic algorithm; infrared stand-off detection; passive chemo-sensing IR absorbers; size 8 mum to 12 mum; thermal imaging camera; Absorption; Bandwidth; Cameras; Chemicals; Periodic structures; Solids;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-4967-5
DOI :
10.1109/APS.2010.5562211
