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Proceedings Paper

Overall design technology of hyperspectral imaging system based on AOTF
Author(s): Jun Wang; Na Ding; Yawei Zheng; Yujie Zhao; Fei Gao; Junna Li; Jilong Wang; Meng Gao; Jun Wu
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Paper Abstract

An acousto-optic tunable filter (AOTF) is an acousto-optic modulator. In this paper, the characteristics and overall design method of AOTF hyperspectral imaging system are proposed, which operates in visible or near infrared waveband (0.4-1.0um) and middle wave or long wave (3-5um and 8-12um). Compared with conventional dispersion element, the AOTF hyperspectral imaging system has a larger clear aperture because of the special characteristic of beam separation mode. In particularly, if the non-collinear design mode is used, the AOTF will have a larger diffraction aperture angle and is more suitable for the application in spectral imaging domain. The AOTF hyperspectral imaging spectrometer that operates in visible/near infrared waveband was developed by the non-collinear TeO2 crystal (8mm×8mm). All lights that are through TeO2 crystal in whole field of view (FOV angle is 5 degree) forms an imagines onto the staring focal plane array by Bragg diffraction. The diffraction wavelength of AOTF can be adjusted by the radio frequency signal. The three-dimensional data cube is composed of two-dimension of object space and wavelength in this way, and the graph and spectral are synthesized and implemented. The AOTF hyperspectral imaging spectrometer operating in visible/near infrared waveband is analyzed, and the detailed analysis data is also presented. The AOTF hyperspectral imaging test is studied and developed, and the analysis of data and the next developing advice is given. We also analyze the method about selection of material and technological design in middle wave/long wave infrared waveband of AOTF hyperspectral imaging system.

Paper Details

Date Published: 18 November 2014
PDF: 6 pages
Proc. SPIE 9298, International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics, 929804 (18 November 2014); doi: 10.1117/12.2072659
Show Author Affiliations
Jun Wang, Xi'an Institute of Applied Optics (China)
Na Ding, Xi’an Institute of Applied Optics (China)
Yawei Zheng, Xi'an Institute of Applied Optics (China)
Yujie Zhao, Xi'an Institute of Applied Optics (China)
Fei Gao, Xi'an Institute of Applied Optics (China)
Junna Li, Xi'an Institute of Applied Optics (China)
Jilong Wang, Xi'an Institute of Applied Optics (China)
Meng Gao, Xi'an Institute of Applied Optics (China)
Jun Wu, Xi'an Institute of Applied Optics (China)


Published in SPIE Proceedings Vol. 9298:
International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics
Jannick P. Rolland; Changxiang Yan; Dae Wook Kim; Wenli Ma; Ligong Zheng, Editor(s)

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