Subwavelength Fiber-optic Displacement Sensing based on Non-contact Near-field Specklegrams
Refereed conference paper presented and published in conference proceedings


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AbstractIn this paper, we present a low-cost non-contact displacement sensor based on fiber specklegrams, achieving a precision of 10 nm, speed of 100 Hz, and a detection range of 3 - 10 micrometers. By collimating the incident laser and reflected light from the sample surface in a flexible fiber, the interference among the different eigenmodes propagating in the multimode fiber (MMF) forms unique specklegram images at different sample positions in space. Accordingly, precise and repeatable noncontact displacement detection can be realized by comparing the recorded specklegrams with the calibrated specklegram database through imaging processing algorithms.
Acceptance Date01/08/2018
All Author(s) ListWang Chen, Fu Feng, Wei Lin, Dihan Chen, Shih-Chi Chen
Name of ConferenceAnnual Meeting of the American Society for Precision Engineering
Start Date of Conference04/11/2018
End Date of Conference09/11/2018
Place of ConferenceLas Vegas, NV
Country/Region of ConferenceUnited States of America
Proceedings TitleProceeding of the Annual Meeting of the American Society for Precision Engineering
Year2018
Month11
Day4
Place of PublicationUSA
LanguagesEnglish-United States
Keywordsfiber-optic sensor, specklegram

Last updated on 2020-04-05 at 10:14