基于AOTF的成像光谱仪及其在同色异谱目标鉴别中的应用

发布时间：2018-07-23 11:22

【摘要】：为了同时获得同色异谱目标的光谱信息和空间分布信息,设计了基于声光可调谐滤波器(acoustooptic tunable filter,AOTF)的成像光谱仪,主要包括前置成像透镜组、AOTF滤光成像模块、AOTF驱动器、CCD图像检测器、图像采集卡和计算机。在计算机的控制下,实现波长的快速扫描,获取每个设定波段下的灰度图像,构建一个光谱图像立方体,因此可以获得图像中任意一点的光谱信息。所设计的成像光谱仪,光谱范围为550~1 000nm,光谱分辨率2.6nm(@632nm),光谱扫描速度快,任意两个波长之间的切换时间小于80μs,整个仪器无机械运动部件,功耗低,抗振能力强。利用该仪器对真假玫瑰花进行了鉴别试验,对涂改物证进行了信息复原实验,并成功地辨别出真假玫瑰花和复原出涂改物证,证实了该成像光谱仪具有优异的同色异谱目标鉴别本领,在同色异谱物质的鉴别上具有广阔的应用前景。
[Abstract]:An imaging spectrometer based on acousto-optic tunable filter (acoustooptic tunable filter AOTF) is designed to obtain the spectral information and spatial distribution information of iso-chromatic and heterospectral targets simultaneously. The imaging spectrometer consists of an AOTF filter imaging module and an AOTF-driver CCD image detector. Image acquisition card and computer. Under the control of the computer, the wavelength can be scanned quickly, the grayscale image of each set band can be obtained, and a spectral image cube can be constructed, so the spectral information of any point in the image can be obtained. The designed imaging spectrometer has a spectral range of 550 nm, a spectral resolution of 2.6nm (632 nm), a fast spectral scanning speed, a switching time of less than 80 渭 s between any two wavelengths, no mechanical moving parts, low power consumption and strong anti-vibration ability. The instrument was used to identify the true and false rose, and the information restoration experiment was carried out on the altered material evidence, and the true and false rose was successfully identified and the altered material evidence was restored. It is proved that the imaging spectrometer has excellent discriminating ability of iso-chromatic and heterospectral targets and has a broad application prospect in the identification of iso-chromatic and heterospectral substances.
【作者单位】：武汉大学电子信息学院;
【基金】：中国石油科技创新基金项目(2012D-5006-0102)资助
【分类号】：TH744.1

【参考文献】