Translator Disclaimer
Paper
21 June 2006 Impact of vibration on performance of Doppler velocimeter
Author Affiliations +
Proceedings Volume 6345, Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; 63451H (2006) https://doi.org/10.1117/12.693083
Event: Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2006, Ancona, Italy
Abstract
The changes in the spectrum of photocurrent in two-beam Doppler velocimeter caused by different types of vibration are analyzed. It is shown that, under certain conditions, periodical laser beam scan and surface vibration are producing identical changes in the spectrum of photocurrent. The changes might be quite considerable even with relatively small amplitude of laser beam scan of several arc seconds while monitoring slowly moving surface. The vibrational structure of Doppler and "pedestal" component in photocurrent are studied; it is shown that with vibrational velocity exceeding half of translational velocity the vibrational bands correspondent to "pedestal" and Doppler component are overlapping. The use of short acquisition time, which allows avoiding formation of broadband line structure in the spectrum, is also studied. The impact of bending vibration of translationally moving surface is also considered; due to averaging action of detector receiving aperture the impact of bending vibration is much less pronounced than that of laser beam scan or surface vibration.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ivan Popov "Impact of vibration on performance of Doppler velocimeter", Proc. SPIE 6345, Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 63451H (21 June 2006); https://doi.org/10.1117/12.693083
PROCEEDINGS
10 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Role of speckles in laser Doppler flowmetry
Proceedings of SPIE (June 19 1998)
Detection of subsurface defects
Proceedings of SPIE (October 30 1998)
Speckle and radiometry
Proceedings of SPIE (December 01 1990)
Role of speckles in laser Doppler perfusion imaging an...
Proceedings of SPIE (April 14 2006)

Back to Top