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Proceedings Paper

Hadamard spectrometer for passive LWIR standoff surveillance
Author(s): Roman V. Kruzelecky; Brian Wong; Jing Zou; Najeeb Mohammad; Wes Jamroz; Mohammed Soltani; Mohamed Chaker; Emile Haddad; Philips Laou; Suzanne Paradis
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Paper Abstract

Based on the principle of the Integrated Optical Spectrometer (IOSPEC), a waveguide-based, longwave infrared (LWIR) dispersive spectrometer with multiple input slits for Hadamard spectroscopy was designed and built intended for passive standoff chemical agent detection in 8 to 12μm spectral range. This prototype unit equips with a three-inch input telescope providing a field-of-view of 1.2 degrees, a 16-microslit array (each slit 60 μm by 1.8 mm) module for Hadamard binary coding, a 2-mm core ZnS/ZnSe/ZnS slab waveguide with a 2 by 2 mm2 optical input and micro-machined integrated optical output condensor, a Si micro-machined blazing grating, a customized 128-pixel LWIR mercury-cadmium-telluride (MCT) LN2 cooled detector array, proprietary signal processing technique, software and electronics. According to the current configuration, it was estimated that the total system weight to be ~4 kg, spectral resolution <4cm-1 and Noise Equivalent Spectral Radiance (NESR) <10-8 Wcm-2 sr-1cm-1 in 8 to 12 μm. System design and preliminary test results of some components will be presented. Upon the arrival of the MCT detector array, the prototype unit will be further tested and its performance validated in fall of 2007.

Paper Details

Date Published: 30 October 2007
PDF: 10 pages
Proc. SPIE 6796, Photonics North 2007, 67962I (30 October 2007); doi: 10.1117/12.778911
Show Author Affiliations
Roman V. Kruzelecky, MPB Communications Inc. (Canada)
Brian Wong, MPB Communications Inc. (Canada)
Jing Zou, MPB Communications Inc. (Canada)
Najeeb Mohammad, MPB Communications Inc. (Canada)
Wes Jamroz, MPB Communications Inc. (Canada)
Mohammed Soltani, Institut National de la Recherche Scientifique (Canada)
Mohamed Chaker, Institut National de la Recherche Scientifique (Canada)
Emile Haddad, MPB Communications Inc. (Canada)
Philips Laou, Defence R&D Canada/Valcartier (Canada)
Suzanne Paradis, Defence R&D Canada/Valcartier (Canada)

Published in SPIE Proceedings Vol. 6796:
Photonics North 2007
John Armitage, Editor(s)

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