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Proceedings Paper

Development of on-line auto gas detection system based on AOTF
Author(s): Feng Wan; Shifu Fan
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Paper Abstract

In this paper, the basic dispersion principle of AOTF (Acousto - Optic Tunable Filter) and the configuration of on-line auto gas detection system based on it are generally described. The off-axial reflection paraboloid mirror employed as the collimation system of light source avoids the light energy loss and spherical aberration. The filament length of infrared light source is limited to 5.2mm for separating incident light beam from diffracted light beam spatially. In this paper, DDS (Direct Digital Synthesizer) measure to be used to realize wavelength scan, an interface circuit between DDS and DSP (Digital Signal Processor) is introduced. Experiment results show that this system based on AOTF has 4000 - 2000cm-1 wavelength range with 15cm-1 spectral resolution and 0.3ms wavelength transfer rate. This system has already been satisfactory for detecting auto gas on-line.

Paper Details

Date Published: 19 May 2006
PDF: 5 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615023 (19 May 2006); doi: 10.1117/12.676425
Show Author Affiliations
Feng Wan, Tianjin Univ. (China)
Shifu Fan, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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