激光能量密度分布的测量方法

激光能量密度分布的测量方法

段锦¹, 吴君¹, 端木繁一², 景文博¹

1. 长春理工大学电子信息工程学院, 长春 130022; 2. 北京理工大学信息科学技术学院, 北京 100081

收稿日期:2008-10-29 修回日期:1900-01-01 出版日期:2009-03-26 发布日期:2009-03-26
通讯作者: 段锦

Method for Measuring Laser Energy Density Distribution

DUAN Jin¹, WU Jun¹, DUANMU Fanyi², JING Wenbo¹

1. School of Electronic Information and Engineering, Changchun University ofScience and Technology, Changchun 130022, China; 2. School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received:2008-10-29 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
Contact: DUAN Jin

摘要/Abstract

摘要： 提出一种用于激光能量密度分布测量与分析的方法, 首先采用图像处理方法对激光光斑图像进行检测处理, 再对激光光斑波面进行拟合, 并采用伪彩色对激光能量分布进行三维显示. 采用Zernike多项式对波前进行拟合和重构, 讨论了拟合采样点的布设方法, 并用激光能量密度测试精度平均误差较小的同心放射状采样点布局方案. 采用伪彩色算法对二维光斑图像进行三维模型显示, 反映光斑不同区域能量分布的相对大小和位置. 实验结果表明, 该方法基本满足激光能量密度分布检测的要求.

关键词: 能量密度分布, Zernike多项式, 波面拟合, 伪彩色变换, 激光光束质量

Abstract: The methods were presented for measuring and analysising laser energy density distribution. First, the spot images were detected and lo cated. Then wavefront was fitted based on Zernike polynomial. Finally, 3D-pseudocolor visualization algorithm was used for 2D-laser spot images. Experimental results indicate that the Zernike polynomial fitting realized wavefront detection and reconstruction. The method of fitting sample points selection was studied based on the least average error of laser energy intensity testing precision. The visualizationmethod reflected the relative sizes and positions of laser spot energy distribution in different areas. The testing system fully satisfied the demand of laser energy intensity measurement.

Key words: energy density distribution, Zernike polynomial, wave front fitting, pseudocolor transform, beam quality

中图分类号:

TP391.41

段锦, 吴君, 端木繁一, 景文博. 激光能量密度分布的测量方法[J]. J4, 2009, 47(02): 311-316.

DUAN Jin, WU Jun, DUANMU Fanyi, JING Wenbo. Method for Measuring Laser Energy Density Distribution[J]. J4, 2009, 47(02): 311-316.