| Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder |
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| 作者姓名： | 王保平 王明军 吴振森 李应乐 向宁静 |
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| 作者单位： | [1]National Key Laboratory of Sciences and Technology on UAV, Northwestern Polytechnical University, Xi＇an 710072, China [2]School of Physics and Electronic Engineering, Xianyang Normal College, Xianyang 712000, China [3]School of Science, Xidian University, Xi＇an 710071, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.61271110,60801047,and 61073106);the New Scientific and TechnologicalStar Project of Shaanxi Province,China(Grant No.2011KJXX39);the Aviation Science Foundation(Grant No.2011ZC53042);the Natural ScienceFoundation of Shaanxi Province,China(Grant Nos.12Jk0955 and 2014JQ0816) |
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| 摘 要： | Based on laser radar equations, a Doppler shift model of a laser pulse beam scattered by a rotating arbitrary convex target is reported in this paper. The boundary relations between an incident pulse beam and the detected area elements are analyzed by geometric methods. The Doppler shift characteristics of the rotating cone and cylinder are discussed and the difference between the laser pulse beam and the plane wave scattered from the same rotating target is compared accordingly. Numerical simulations show that the Doppler shift is tightly relevant to their dimensions, speeds, and so on. In the same incidence conditions, the pulse beam and plane wave have difference peak values and the same Doppler shift bandwidth. If the waist radius of the pulse beam is larger, the peak value is higher, and the Doppler shifts are proportional to the speed of the rotating target. By virtue of our theoretical model, we probe into the scattered characteristics of the Doppler shifts of a laser pulse beam, which would benefit target identification in national defense.
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| 关 键 词： | 多普勒频移 旋转靶 圆柱体 圆锥体 激光 脉冲束 脉冲光束 分散特性 |
Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder |
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| Wang Bao-Ping,Wang Ming-Jun,Wu Zhen-Sen,Li Ying-Le,Xiang Ning-Jing.Doppler shift of a laser pulse beam scattered by a rotating cone and cylinder[J].Chinese Physics B,2014(5):60-65. |
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| Authors: | Wang Bao-Ping Wang Ming-Jun Wu Zhen-Sen Li Ying-Le Xiang Ning-Jing |
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| Abstract: | Based on laser radar equations, a Doppler shift model of a laser pulse beam scattered by a rotating arbitrary convex target is reported in this paper. The boundary relations between an incident pulse beam and the detected area elements are analyzed by geometric methods. The Doppler shift characteristics of the rotating cone and cylinder are discussed and the difference between the laser pulse beam and the plane wave scattered from the same rotating target is compared accordingly.Numerical simulations show that the Doppler shift is tightly relevant to their dimensions, speeds, and so on. In the same incidence conditions, the pulse beam and plane wave have difference peak values and the same Doppler shift bandwidth. If the waist radius of the pulse beam is larger, the peak value is higher, and the Doppler shifts are proportional to the speed of the rotating target. By virtue of our theoretical model, we probe into the scattered characteristics of the Doppler shifts of a laser pulse beam, which would benefit target identification in national defense. |
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| Keywords: | scattered characteristics of laser pulse beams Doppler shift laser radar target identification |
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