| 测风激光雷达光束发散对测量精度的影响 |
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| 引用本文： | 丁红星,孙东松,杨 昭,顾 江. 测风激光雷达光束发散对测量精度的影响[J]. 激光与红外, 2004, 34(1): 18-20 |
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| 作者姓名： | 丁红星 孙东松 杨 昭 顾 江 |
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| 作者单位： | 苏州大学物理科学与技术学院,苏州,215006;苏州大学物理科学与技术学院,苏州,215006;苏州大学物理科学与技术学院,苏州,215006;苏州大学物理科学与技术学院,苏州,215006 |
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| 摘 要： | 介绍了基于Fabry2Perot ( F2P) 标准具的直接探测多普勒激光雷达的风速测量原理,讨论了接收光发散角对F2P 标准具测风激光雷达系统设计参数和多普勒频率测量精度的影响,并数值计算了激光多普勒雷达系统的光束发散引起的多普勒速度测量误差,结果表明:入射光束发散角小于Imrad 时,相对误差随发散角的变化缓慢,在6 %之内;而当大于约Imrad 时,相对误差迅速增大,在2mrad 时达到约40 %。
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| 关 键 词： | 多普勒 激光雷达 风场测量 Fabry-Perot标准具 |
| 文章编号： | 1001-5078(2004)01-0018-03 |
Accuracy Affected by the Beam Divergence in A Fabry-Perot Etalon Based Wind Lidar |
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| DING Hong-xing,SUN Dong-song,YANG Zhao,GU Jiang. Accuracy Affected by the Beam Divergence in A Fabry-Perot Etalon Based Wind Lidar[J]. Laser & Infrared, 2004, 34(1): 18-20 |
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| Authors: | DING Hong-xing SUN Dong-song YANG Zhao GU Jiang |
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| Abstract: | The principle of wind measurement for a direct detection Doppler wind lidar with a Fabry2Perot etalon is described in the paper. The Doppler measurement error as well as the designed system parameters are affected by the beam divergence to the etalon. The numerical calculation for a designed Doppler lidar system has shown that the per2 centage error is increased slowly to 6 % for the beam divergence less than lmrad , and quickly to about 40 % at 2mrad. |
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| Keywords: | Doppler lidar Wind field measurement Fabry-Perot etalon |
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