基于共焦球面法布里-珀罗干涉仪的激光超声信号检测

基金项目:

黑龙江省教育厅2008 年度科学技术基金资助项目(11531331)

详细信息

Signal Detection of Laser Ultrasound Based on Spherical Confocal Fabry-Perot Interferometer

摘要: 从理论上对共焦球面法布里-珀罗干涉仪的自由谱宽、透射谱线半宽度和精细度等光学参数与共振腔长度及球面镜曲率半径的关系进行了分析。根据激光超声检测的特点和要求, 设计制作了一台实验室用的共焦球面法布里-珀罗干涉仪。根据选择的干涉仪参数及其具体结构形式, 获得了干涉仪的锯齿波扫描透射曲线的试验结果, 成功实现了激光超声的非接触测量。
- 激光超声检测 /
- 共焦球面法布里-珀罗干涉仪 /
- 速度型干涉测量
Abstract: The relationships were analyzed for the spherical confocal Fabry-Perot interferometer between free spectral width, half-width of transmission lines and fine optical parameters of swith the cavity length and radius curvature of spherical mirror theoretically. According to the characteristics and requirements of laser ultrasonic testing, a laboratory spherical confocal Fabry-Perot interferometer was designed. According to the interferometer parameters chosen and the specific structural form, the scanned sawtooth wave of the interferometer was got, which showed the success of non-contact laser ultrasonic measurement.
- Laser ultrasound detection /
- Spherical confocal Fabry-Perot interferometer /
- Speed type interferometry

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