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10 February 2017 The characteristic of reference beam laser Doppler signal of solid state surface
Qiucheng Gong, Jian Zhou, Bin Zhang
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Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102501S (2017) https://doi.org/10.1117/12.2266659
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China
Abstract
In the designed reference beam 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 reference beam laser Doppler signal of this solid-state surface according to the order of the speckle field intensity variation. The expression of reference beam 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 reference beam 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.
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Qiucheng Gong, Jian Zhou, and Bin Zhang "The characteristic of reference beam laser Doppler signal of solid state surface", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102501S (10 February 2017); https://doi.org/10.1117/12.2266659
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KEYWORDS
Doppler effect
Solid state lasers
Solid state physics
Speckle
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