基于AOTF的近红外成像系统研究  

Study on Near-infrared Imaging System Based on AOTF

作　　者：李晓[1,2] 师艺杰 宋雁鹏 刘顺[1,2] 张惠[1] 

机构地区：[1]中北大学计算机与控制工程学院,山西太原030051 [2]山西省光电信息与仪器工程技术研究中心,山西太原030051

出　　处：《压电与声光》2017年第2期289-294,共6页Piezoelectrics & Acoustooptics

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)

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。An near - infrared imaging system was designed by us ing the acous to-opt ic tunable fil ter （AOTF） as the spectroscopic devices and FPA-640 X 512 InGaA s focal plane array detector as the sen sitive optical re ceiv ing device. The system consists of three parts including of a radio frequency driving source module, AOTF optical module and array detector imaging module. First, the operating principle of AOTF was introduced, and the high frequency signal generating circui t and power ampl i fier for driving AOTF to diffract di fferent light wavelength were designed based on the principle. The detector imaging module used FPGA as the core processing uni t, received the rising edge sig-nal from the RF driven synchronous interface circuit,then generated the t ime sequence for detectors to work,finally restored the image through the data acquisit ion and storage module. The near-infrared imaging system was set up. The experimental results showed that the image qual i ty was very clear in the near infrared wavelength range of 0. 9-1. 7 μm, which has a high appl icat ion value.

关 键 词：成像系统 焦平面阵列探测器 声光可调谐滤光器(AOTF) 近红外 同步 

分 类 号：TN216[电子电信—物理电子学]