【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。更多还原

【Abstract】 In order to measure thermal effect parameters of high-energy laser material on-line,a testing device with aperture of 50 mm 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 30 m ~ 120 m. The system can be applied to measure thermal effect parameters of high-energy laser material online.更多还原