高光谱分辨率激光雷达鉴频器的设计与分析
发布时间:2018-05-12 19:50
本文选题:激光雷达 + 高光谱 ; 参考:《物理学报》2017年18期
【摘要】:提出了利用Fabry-Perot干涉仪的反射场实现高光谱分辨率激光雷达精细探测大气光学参量的新方法和思路.设计了高光谱分辨率的分光系统,并分析了干涉仪反射场的光谱透过特征曲线.结合高光谱激光雷达探测信号特征,讨论分析了谱分离比和瑞利信号透过率随反射率和腔长的变化曲线,同时结合误差传递公式,建立了仿真分析模型,讨论了回波光束发散角和入射角变化对激光雷达探测结果的影响.结果表明,所提出的Fabry-Perot干涉仪反射场可以实现高光谱分辨率激光雷达探测系统的精细分光,同时探测结果误差随回波光束发散角变化不敏感,控制发散角在10 mrad以内,入射角在1.5 mrad以内时,可以实现气溶胶光学参数廓线的高精度探测.
[Abstract]:A new method and train of thought for fine detection of atmospheric optical parameters by hyperspectral resolution lidar using Fabry-Perot interferometer reflectance field is presented. A spectroscopic system with high spectral resolution is designed, and the spectral transmission characteristic curve of the interferometer reflectance field is analyzed. Based on the characteristics of the detection signal of hyperspectral lidar, the curves of spectral separation ratio and Rayleigh signal transmittance with reflectivity and cavity length are discussed and analyzed. At the same time, the simulation analysis model is established by combining the error transfer formula. The influence of the divergence angle and incidence angle of echo beam on the detection results of lidar is discussed. The results show that the reflectance field of the proposed Fabry-Perot interferometer can realize fine light separation of the high spectral resolution lidar detection system, and the error of the detection results is not sensitive to the variation of the divergence angle of the echo beam, and the controlled divergence angle is less than 10 mrad. When the incident angle is less than 1.5 mrad, the aerosol optical parameter profile can be detected with high precision.
【作者单位】: 西安理工大学机械与精密仪器工程学院;
【基金】:国家自然科学基金(批准号:61575160,61308107,41627807) 陕西省青年科技新星人才项目(资助号:2016KJXX-72)资助的课题~~
【分类号】:TN958.98
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本文编号:1879926
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