激光技术, 2018, 42 (2): 201, 网络出版: 2018-03-21
基于H-S波前传感器的高能激光材料热效应参量测试
Parameter measurement of thermal effect of high-energy laser material based H-S wavefront sensor
测量与计量 热效应 Hartmann-Shack波前传感器 长焦距测量 激光材料 测量不确定度 measurement and metrology thermal effect Hartmann-Shack wavefront sensor long focal-length measurement laser material measurement uncertainty
摘要
为了实现高能激光材料热效应参量的在线测试,设计了一套50mm口径的测量装置。装置采用准直He-Ne激光为光源,准直光经激光材料后的光程差用Hartmann-Shack波前传感器检测。根据波像差分解理论及波前变换关系,获得了高能激光材料热效应参量。分析评估了装置的扩展测量不确定度,对影响测量不确定度的系统参量进行了校准,最后设计并完成了测量不确定度对比验证实验。结果表明,系统波前畸变测量不确定度为0.06λ, 30m~120m范围热焦距的扩展测量不确定度为8.4%。该系统能有效地用于高能激光材料热效应参量的在线测试。
Abstract
In order to measure thermal effect parameters of high-energy laser material on-line, a testing device with aperture of 50mm was specially designed. Collimating He-Ne laser was used as light source. The optical-path difference of testing beam after passing the material was measured by Hartmann-Shack wavefront sensor. According to wavefront aberration decomposition theory and wavefront transformation relationship, thermal effect parameters of high-energy laser material were gotten. Measurement uncertainty of the device was analyzed and evaluated. The system parameters which affected measurement uncertainty were calibrated. Finally, a comparative experiment of measurement uncertainty was designed and completed. The result shows that, the measurement uncertainty of system wavefront aberration is 0.06λ. The measurement uncertainty is 8.4% with thermal focal length of 30m~120m. The system can be applied to measure thermal effect parameters of high-energy laser material online.
樊红英, 张浩, 赵琦, 蒋泽伟, 贾静, 陈好. 基于H-S波前传感器的高能激光材料热效应参量测试[J]. 激光技术, 2018, 42(2): 201. FAN Hongying, ZHANG Hao, ZHAO Qi, JIANG Zewei, JIA Jing, CHEN Hao. Parameter measurement of thermal effect of high-energy laser material based H-S wavefront sensor[J]. Laser Technology, 2018, 42(2): 201.