New speckle velocimeter using two self-mixing laser diodes

Sahin Ozdemir, Tatsuya Takasu, Shigenobu Shinohara, Hirofumi Yoshida, Hiroaki Ikeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose a novel laser speckle velocimeter using two self-mixing laser diodes (SM-LDs). It has been observed that the speckle signal measured by the measurement system has a strong dependence on the path illuminated by an SM-LD. When a thin surface with a different surface characteristic attached to a moving plane is illuminated the frequency of the intensity changes of the waveform changes. Finding the time instant when this target surface is illuminated gives the opportunity to find the velocity of the moving plane. In this study we propose a method to find the time at which the surface is started to be illuminated and exploit this change in the waveform of the speckle signal to detect the velocity of the target transversely translating across the laser beam.

Original languageEnglish (US)
Title of host publicationProceedings of the SICE Annual Conference
Editors Anon
PublisherSociety of Instrument and Control Engineers (SICE)
Pages947-950
Number of pages4
StatePublished - Dec 1 1997
EventProceedings of the 1997 36th SICE Annual Conference - Tokushima, Jpn
Duration: Jul 29 1997Jul 31 1997

Other

OtherProceedings of the 1997 36th SICE Annual Conference
CityTokushima, Jpn
Period7/29/977/31/97

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Ozdemir, S., Takasu, T., Shinohara, S., Yoshida, H., & Ikeda, H. (1997). New speckle velocimeter using two self-mixing laser diodes. In Anon (Ed.), Proceedings of the SICE Annual Conference (pp. 947-950). Society of Instrument and Control Engineers (SICE).