Development of on-line auto gas detection system based on AOTF

Feng Wan; Shifu Fan

doi:10.1117/12.676425

19 May 2006 Development of on-line auto gas detection system based on AOTF

Feng Wan, Shifu Fan

Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 615023 (2006) https://doi.org/10.1117/12.676425
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

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.

Citation Download Citation

Feng Wan and Shifu Fan "Development of on-line auto gas detection system based on AOTF", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615023 (19 May 2006); https://doi.org/10.1117/12.676425

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