The characteristic of laser Doppler signal of solid-state surface

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• 作者：Qiucheng Gong ; ^{gong.qiucheng@nudt.edu.cn} ; Jian Zhou ; Bin Zhang
• 关键词：laser Doppler velocimeter ; Solid-state surface ; Speckle ; Signal intensity
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：131
• 期：Complete
• 页码：609-614
• 全文大小：653 K
• 卷排序：131

文摘

In the designed laser Doppler velocimeter (LDV) for the vehicle self-contained navigation system, the reference object is a kind of solid-state surface. This paper expounded the generation mechanism of laser Doppler signal of this solid-state surface according to the order of the speckle field intensity variation. The expression of laser Doppler signal intensity of solid-state surface is derived based on the theory of speckle and stochastic process. Results of theory and experiments show that the essence of laser Doppler signal of solid-state surface is the coherence stack of two speckles. The signal intensity is directly proportional to the diameter of the photosensitive surface of detector and is inversely proportional to the diameter of laser spot on ground.