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Proceedings Paper

Improvements in NDIR gas detection within the same optical chamber
Author(s): Juan Carlos Martinez-Anton; Manuel Silva-Lopez
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Paper Abstract

Non-dispersive infrared (NDIR) is a well known technique for gas concentration monitoring. Lead salt photoconductors and thermopile detectors are typically used. Together with gas filter correlation (GFC) they are the basis for a reference standard in environmental gas monitoring like carbon monoxide determination and other gas species. To increase gas sensitivity, a multi-pass optical cavity is often used. In this contribution we propose a new optical design that allows for auto-reference multiple gas detection. It basically consists of an array of White's cell multi-pass camera that allows multiple channels with independent lengths inside the same volume. We explore its performance for carbon monoxide detection and based on recent commercial developments in infrared detector and emitter technologies.

Paper Details

Date Published: 22 September 2011
PDF: 6 pages
Proc. SPIE 8167, Optical Design and Engineering IV, 816723 (22 September 2011); doi: 10.1117/12.896856
Show Author Affiliations
Juan Carlos Martinez-Anton, Escuela Univ. de Optica (Spain)
Manuel Silva-Lopez, Escuela Univ. de Optica (Spain)

Published in SPIE Proceedings Vol. 8167:
Optical Design and Engineering IV
Jean-Luc M. Tissot; Laurent Mazuray; Rolf Wartmann; Jeffrey M. Raynor; Andrew Wood, Editor(s)

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