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Acousto - optic tunable filter (AOTF) is made ??of the principle of the new role of the acousto-optical spectroscopic devices , it has traditional spectroscopic element (prism or grating ) can not be compared to the advantages , including small size , all solid member , no moving parts ; clear aperture , large aperture angle of incidence : high diffraction efficiency ; electric tuner , and scan speed . At present , the AOTF developed spectrometer has been used in industry, agriculture, aviation and other fields , and achieved good results . Larger aperture and the angle of incidence of the light through the aperture , AOTF has great potential in the field of application of imaging spectroscopy , but the image due to TeO 2 dispersion of the material caused drift and fuzzy issues that hinder the development of the application . The present paper through the accurate calculation of the AOTF parameters , as well as the crystal exit surface carefully designed light wedge , in theory, to solve the traditional AOTF image drift and the imaging blur difficulties . Data simulation and quantitative results show that the method adopted in this paper , can basically eliminate the image drift , and can improve the clarity of the image resolution . Based on this thesis, the design of the AOTF , and integrated optics, imaging lens , CCD detector, RF power of this thesis spectral imaging system is designed and implemented . Spectral band scanning , spectral image acquisition system under the control of the computer . To test the performance of the system in spectral scanning accuracy, spectral resolution, and image drift , image quality aspects have been a good result. Imaging spectroscopy to verify the use of the system on the plant leaves green plants \Experimental grasshoppers in a simulated environment for the first time , found huge differences in locusts and grass near infrared reflectance spectra . It also identifies a great application prospects of the system in the field of agricultural pest detection .
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