摘要
为了探索金属几何尺寸(例如直径等)的光电检测技术,对激光检测金属物的形变与缺陷的原理进行了摸索研究。基于光学谐振腔能产生丰富的高阶模式现象,文中使用开腔式氦氖激光谐振腔产生的激光,对在金属干扰下的高阶模式进行分析。该实验采用楔形铝箔作为干扰金属,改变铝箔与激光中心的距离,研究在不同干扰范围下产生光斑的变化趋势与特性。通过CMOS图像传感器采集光斑细节图,结果显示铝箔靠近激光中心且不遮挡中心时,竖直方向移动铝箔,光斑图的边缘信息缺失并发生旋转,不同方向的光束消失再现的时间不同。该实验研究的干扰特性,可用于激光检测领域如金属外表面缺陷检测、外形检测等领域的研究。
In order to explore the photoelectric detection technology of metal geometry(such as diameter),the principle of laser detection of metal deformation and defects is explored.Based on the optical cavity,a rich high-order mode phenomenon can be generated.In this paper,the laser generated by the open-cavity He-Ne holmium laser is used to analyze and summarize the highorder modes under metal interference.In this experiment,wedge-shaped aluminum foil is used as the interference metal,and the distance between the aluminum foil and the laser center is changed.The trend and characteristics of the spot generated under different interference ranges are studied.The spot detail map is collected by the CMOS image sensor.The result shows that when the aluminum foil is close to the center of the laser and does not block the center,the edge information of the spot pattern is missing and rotated by moving aluminum foil vertically,and the time of disappearing and reproducing of the light beams in various directions is different.The interference characteristics of this experimental study can be used in the field of laser detection such as metal surface defect detection and shape inspection.
作者
何路遥
李阳
高秀敏
HE Luyao;LI Yang;GAO Xiumin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《智能计算机与应用》
2020年第2期221-224,共4页
Intelligent Computer and Applications
基金
国家重点研发计划(2018YFC1313800)。
