高功率激光装置快速自动准直系统  

Laser Beam Fast Automatic Alignment System for High Power Laser Facility

作　　者：李红[1] 朱健强[1] 林强[1] 杨朋千[1] 张艳丽[1] 刘代中[1] 朱宝强[1] 

机构地区：[1]中国科学院上海光学精密机械研究所高功率激光物理联合实验室,上海201800

出　　处：《光子学报》2017年第10期8-14,共7页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(No.2007SQ804);中日韩激光聚变高能量密度物理合作研究课题(No.2012DFG62040)资助~~

摘　　要：为提高自动准直效率,结合以太网,设计出一套新型光路自动准直控制和检测方案.该方案采用基于耦合矩阵的前馈补偿及图像Jacobian矩阵的近远场串并行准直方式,并引入局部自适应阈值和二值化算法,同时将模糊控制算法运用到步进电机的调整过程中,提高光束近远场图像的处理精度,降低系统的准直时间.实验结果表明,该准直系统远场的平均调整误差为空间滤波器小孔直径0.44%,能够满足准直系统远场调整精度(小于小孔直径5%)的要求,准直时间由原有的30mins缩短至12mins左右.In order to improve the efficiency of automatic alignment, combined with Ethernet, a new optical path automatic alignment control and detection scheme was describled. The proposed near-far field parallel alignment method implements forward feed back compensation based on coupling matrix and Jacohian image matrix. By introducing the image local adaptive thresholding, image binaryzation, and the fuzzy stepping motor control algorithm, the precision of near-far field image detection was improved with less processing time. The results show that the average far-field alignment error is smaller than 0.44 ; of spatial filter pinhole diameter, which meets the alignment system requirements （5% of spatial filter pinhole diameter）, the alignment time reduces from the original 30 mins to 12 rains.

关 键 词：自动准直 图像处理 耦合矩阵 反馈控制 自适应阈值 模糊控制 二值化 高功率激光驱动器 

分 类 号：TN242[电子电信—物理电子学]