Effect of speckle pattern on laser Doppler velocimeters by varying angle between the laser beam direction and the velocity

Liang Lu; Jijun Dai

doi:10.1117/12.836967

24 November 2009 Effect of speckle pattern on laser Doppler velocimeters by varying angle between the laser beam direction and the velocity

Liang Lu, Jijun Dai

Author Affiliations +

Proceedings Volume 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration; 75090O (2009) https://doi.org/10.1117/12.836967
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

This paper presents a theoretical analysis speckle effect and a comparison with experiment results on laser Doppler velocimeters at different velocity. We have found that the value of ratio between broadening of frequency and center frequency is about 30% from 32.2mm/s to 379.6mm/s and effect of speckle pattern is one of the prime reasons. The error caused by effect of speckle pattern is an intolerant value in velocity measurements.

Citation Download Citation

Liang Lu and Jijun Dai "Effect of speckle pattern on laser Doppler velocimeters by varying angle between the laser beam direction and the velocity", Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 75090O (24 November 2009); https://doi.org/10.1117/12.836967

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