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Proceedings Paper

Modular reconfigurable matched spectral filter spectrometer
Author(s): Elizabeth Schundler; James R. Engel; Thomas Gruber; Robert Vaillancourt; Ryan Benedict-Gill; David J. Mansur; John Dixon; Kevin Potter; Scott Newbry
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Paper Abstract

OPTRA is currently developing a modular, reconfigurable matched spectral filter (RMSF) spectrometer for the monitoring of greenhouse gases. The heart of this spectrometer will be the RMSF core, which is a dispersive spectrometer that images the sample spectrum from 2000 – 3333 cm-1 onto a digital micro-mirror device (DMD) such that different columns correspond to different wavebands. By applying masks to this DMD, a matched spectral filter can be applied in hardware. The core can then be paired with different fore-optics or detector modules to achieve active in situ or passive remote detection of the chemicals of interest. This results in a highly flexible system that can address a wide variety of chemicals by updating the DMD masks and a wide variety of applications by swapping out fore-optic and detector modules. In either configuration, the signal on the detector is effectively a dot-product between the applied mask and the sample spectrum that can be used to make detection and quantification determinations. Using this approach significantly reduces the required data bandwidth of the sensor without reducing the information content, therefore making it ideal for remote, unattended systems. This paper will focus on the design of the RMSF core.

Paper Details

Date Published: 3 June 2015
PDF: 9 pages
Proc. SPIE 9482, Next-Generation Spectroscopic Technologies VIII, 94820T (3 June 2015); doi: 10.1117/12.2177727
Show Author Affiliations
Elizabeth Schundler, OPTRA, Inc. (United States)
James R. Engel, OPTRA, Inc. (United States)
Thomas Gruber, MESH, Inc. (United States)
Robert Vaillancourt, OPTRA, Inc. (United States)
Ryan Benedict-Gill, OPTRA, Inc. (United States)
David J. Mansur, OPTRA, Inc. (United States)
John Dixon, OPTRA, Inc. (United States)
Kevin Potter, OPTRA, Inc. (United States)
Scott Newbry, OPTRA, Inc. (United States)

Published in SPIE Proceedings Vol. 9482:
Next-Generation Spectroscopic Technologies VIII
Mark A. Druy; Richard A. Crocombe; David P. Bannon, Editor(s)

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