Analysis and determination of lidar geometrical factor
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1.
Key Laboratory of Atmospheric Optics, Anhui Institutes of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
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2.
School of Graduate, Chinese Academy of Sciences, Beijing 100039, China
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Corresponding author:
HU Shun-xing, sxhu@aiofn.ac.cn
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Received Date:
2007-01-15
Accepted Date:
2007-03-29
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Abstract
To employ lidar for short distance detecting,the geometrical factor must be previously know.Theoretical analysis and experimental study are applied for determination of lidar geometrical factor.Firstly,the geometrical factors are analyzed for lidar with biaxial or coaxial transmitter-receiver.A full focusing filling factor is introduced.Equations of two kinds of filling factors related to geometrical factor are deduced based on geometrical optics.The theoretical range of geometrical factor's value is reached based on these equations.Secondly,a method is introduced for determination of geometrical factor by fitting lidar's back signal of far distance for inversing the signal of short distance.As an example,the geometrical factor profile of AML-2 lidar made in Chinese Academy of Science is determined experimentally with this method.The experimental results are accordant with the theoretical analysis.
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