• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Optical Design and Testing; 20071112-15; Beijing(CN) >Comparison of signals under top-hat and Gaussian beam excitations in surface thermal lens technique
【24h】

Comparison of signals under top-hat and Gaussian beam excitations in surface thermal lens technique

机译：表面热透镜技术在高帽光束和高斯光束激发下的信号比较

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A theoretical model for the surface thermal lens (STL) signal with modulated top-hat and Gaussian beam excitations is developed. For an optical coating sample, distributions of the temperature and surface deformation in both transient and quasi-steady states are deduced, and the STL amplitudes, corresponding to the alternating current (AC) deformation and direct current (DC) deformation, respectively, are defined. Numerical simulations and comparison results for the temperature and deformation demonstrate that there exist large differences in radial distributions between the AC and DC cases especially in the high modulation frequency range. The pulsed or AC STL amplitude under the top-hat beam excitation is approximately two times of that under the Gaussian beam excitation at the optimum detection distance in the high frequency, and correspondingly, the DC STL amplitude in quasi-steady state with top-hat beam excitation is only ～1.1 times of that with Gaussian beam excitation at the optimum detection distance. Influences of the heating-beam radius and modulation frequency on the STL amplitudes are also presented and compared. The application of the STL technique to the deformation measurement of an optical component is discussed.
机译：建立了具有调制礼帽和高斯光束激励的表面热透镜（STL）信号的理论模型。对于光学涂层样品，推导了瞬态和准稳态状态下温度和表面变形的分布，并定义了分别对应于交流（AC）变形和直流（DC）变形的STL幅度。温度和变形的数值模拟和比较结果表明，在交流和直流情况下，尤其是在高调制频率范围内，径向分布存在很大差异。高帽波束激励下的脉冲或AC STL幅度约为高频下最佳检测距离下高斯波束激励下的脉冲或AC STL幅度的两倍，相应地，高帽波束处于准稳态时的DC STL幅度在最佳检测距离下，光束激发仅为高斯光束激发的〜1.1倍。还介绍并比较了加热束半径和调制频率对STL幅度的影响。讨论了STL技术在光学部件变形测量中的应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号