为了得到激光光束的某些参量,为设计和改进激光器提供依据,建立了一套激光光斑自动采集与分析系统,搭建了实验平台,并编写了一套基于虚拟仪器开发平台LabVIEW及其图像处理软件包NI Vision的用于采集和分析激光光斑的软件.该软件能实时显示光斑中心位置的漂移轨迹、在x方向和y方向漂移的标准差及其随时间变化的趋势等,同时,还能对基模高斯光束进行分析.经过去噪处理的光斑图样能以3维灰度图的形式显示出来,得到任意剖面的光强信息,并以此进行高斯曲线拟合,得出拟合参量以判断光强曲线接近高斯曲线的程度.结果表明,这种系统可以动态地采集光斑信息并进行处理,具有实时性.%In order to acquire laser beam parameters, provide information for designing and improving the laser, an automatic acquiring and analyzing system of laser spot was established and an experiment platform was built up. Software used for acquiring and analyzing laser spot was programmed based on Lab VIEW, a virtual instrument platform, and its image processing toolbox called NI Vision. This software can display the trail of the laser spot center, concluding the standard deviations and the temporal trend of both the x-axis drift and y-axis drift. Furthermore, it can be used to analyze the fundamental mode of the laser beam. An image of laser spot can be displayed in the form of 3-D gray graph after noise removing. The data at any section of the 3-D gray graph can be acquired and used for Gaussian curve fitting, concluding the fitting parameters in order to judge how much the actual laser beam is close to a theoretical Gaussian one. Results indicate that this system can dynamically acquire and process information of the laser spot at real time.
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