光栅衍射型激光告警的探测技术

发布时间：2018-06-01 10:45

本文选题：近红外阵列 + 激光告警　；参考：《科学技术与工程》2017年31期

【摘要】：为了能够使近红外探测器快速获取来袭激光的二维方位角、波长,提出了一种基于FPGA架构的驱动控制技术。上位机为了能够方便、快捷地控制探测器,采用VC++编写的上位机通过USB传输到FPGA,再通过FPGA将相应的命令发送给探测器,对它的工作方式增益、带宽、积分时间进行灵活的配置;FPGA相应的控制探测器的帧频、行频以及数据配置引脚使探测器能够输出有效的数据;然后通过USB上传到VC++上位机对有效的数据进行采集显示。利用此方法对波长为850 nm的激光从不同的方位角进行入射,用编写的VC++上位机成像软件进行数据采集处理,对采集到的图片进行分析;依据光斑强度确定零级、一级,推算出来袭激光方位角、波长,实验表明波长分辨率小于10 nm,角度分辨率小于2°。
[Abstract]:In order to obtain the 2-D azimuth and wavelength of incoming laser quickly, a driving control technique based on FPGA architecture is proposed. In order to control the detector conveniently and quickly, the host computer written by VC is transmitted to FPGA via USB, and the corresponding command is sent to the detector through FPGA. The integration time can be flexibly configured to control the frame frequency, row frequency and data configuration pin of the detector so that the detector can output effective data, and then upload the effective data to VC PC through USB to collect and display the effective data. By using this method, the laser with wavelength of 850 nm is incident from different azimuth angles, the data is collected and processed by VC PC imaging software, and the collected images are analyzed, and the zero order and one stage are determined according to the intensity of the spot. The azimuth and wavelength of the incoming laser are calculated. The experimental results show that the wavelength resolution is less than 10 nm and the angle resolution is less than 2 掳.
【作者单位】：中北大学信息与通信工程学院山西省光电信息与仪器工程技术研究中心;
【基金】：国家自然科学基金仪器专项基金(61127015) 国际科技合作项目(2013DFR10150)资助
【分类号】：TN215;TN249

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