基于AOTF的近红外成像系统研究

发布时间：2018-01-14 15:27

本文关键词：基于AOTF的近红外成像系统研究　出处：《压电与声光》2017年02期 　论文类型：期刊论文

【摘要】：以声光可调谐滤光器(AOTF)作为分光器件,采用FPA-640×512InGaAs焦平面阵列探测器作为光学敏感接收器件,设计了近红外成像系统。该系统由AOTF光路模块、射频驱动源模块及阵列探测器成像模块3大部分组成。首先介绍了AOTF的工作原理,并根据该原理设计了高频信号发生电路和功率放大电路,用来驱动AOTF衍射出不同波长的光波;以现场可编程门阵列(FPGA)作为核心处理单元的探测器成像模块,在接收到来自射频驱动同步接口电路的上升沿信号后,产生探测器正常工作所需时序,最终通过数据采集存储实现图像复原。搭建了近红外成像系统,实验表明,在0.9~1.7μm近红外波段范围内系统成像质量清晰,具有较高的应用价值。
[Abstract]:The acousto-optic tunable filter (AOTF) as light splitting device, using FPA-640 * 512InGaAs focal plane array detector as sensitive optical receiving device, the design of near infrared imaging system. The system is composed of AOTF optical module, RF module driver source and detector array imaging module is composed of 3 parts. Firstly, this paper introduces the principle of AOTF. According to the design principle of the high frequency signal generator and power amplifier circuit is used to drive the AOTF diffraction light of different wavelengths; using a field programmable gate array (FPGA) as the core processing unit of the detector imaging module, receiving rise from RF driven synchronous interface circuit along the signal, generated by the sequential detector to normal finally, through the data acquisition and storage to realize image restoration. We constructed a near infrared imaging system, imaging experiments show that in 0.9~1.7 m near infrared range system The quality is clear and has high application value.

【作者单位】：中北大学计算机与控制工程学院;山西省光电信息与仪器工程技术研究中心;
【基金】：国际科技合作基金资助项目(2013DFR10150) 国家自然科学基金仪器专项基金资助项目(61127015)
【分类号】：TN216
【正文快照】： 0引言传统的光栅、棱镜光谱成像系统虽然在高光谱甚至超光谱领域具有很大优势,但其光谱响应固定不变,不能满足对目标探测的多光谱响应的需求。与之相比,声光可调谐滤光器(AOTF)成像光谱仪光谱扫描速度快,光谱范围宽,入射角孔径及视场角大,可实现波长任意、快速选择,在多光谱成

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