远近场自适应激光光斑能量中心检测  

Adaptive detection for near-far field laser spot energy center

作　　者：何佳凯 黄来玉 杨德振 安成斌[1] HE Jia-kai;HUANG Lai-yu;YANG De-zhen;An Cheng-bin(North China Research Institute of Electro-Optics,Beijing 100015,China;Military Region Data Information Room of Liaoning Province,Shenyang 110032,China;Beijing Institute of Vacuum Electronic Technology,Beijing 100015,China)

机构地区：[1]华北光电技术研究所,北京100015 [2]辽宁省军区数据信息室,辽宁沈阳110032 [3]北京真空电子技术研究所,北京100015

出　　处：《激光与红外》2022年第4期620-624,共5页Laser & Infrared

摘　　要：某激光武器在研制过程中,需要对激光光斑进行中心校准,确保发射能量稳定汇聚于目标处。现有光斑中心检测算法无法满足远场不规则光斑的能量中心校准,为此本文提出了一种基于自适应disk掩膜的激光光斑中心检测算法,首先通过双边滤波、伽马拉伸等操作实现图像增强,然后用大津法进行图像阈值分割,通过二值化的面积确定掩膜半径,用掩膜与光斑原图做匹配从而进行光斑中心检测,确定能量中心。该方法在近场光斑与远场不规则光斑的中心检测均具有优异鲁棒性和准确性,可实现近场光斑±1个像素内误差,在0.8μm之内,远场±2个像素内,在1.6μm之内,以此用于激光类产品的实际工程设计,提升同类产品的性能。In the development of a laser weapon,it is necessary to carry out central calibration of the laser spot to ensure the emission energy is stably concentrated at the target.The existing light spot center detection algorithm cannot meet the energy center calibration of far-field irregular spots.For this purpose,a laser spot center detection algorithm based on adaptive disk mask is proposed.First of all,image enhancement is achieved through bilateral filtering,gamma stretching and other operations,and then OTSU method is used for image threshold segmentation.Determined by the area of the binary mask radius,the mask is matched with the original image of the spot to detect the spot center and determine the energy center.This method has excellent robustness and accuracy in the center detection of near-field spot and far-field irregular spot,and can achieve±1 pixel error within 0.8μm for near-field spot,and±2 pixel error within 1.6μm for far-field spot.It is demonstrated that the proposed method can be used in the practical engineering design of laser products and improves the performance of similar products.

关 键 词：激光校准 能量中心 类间方差法 disk掩膜 远场不规则光斑 

分 类 号：TN249[电子电信—物理电子学]