Remote sensing of pressure inside deformable microchannels using light scattering in Scotch tape

We present a simple but effective method to measure the pressure inside a deformable microchannel using laser scattering in a translucent Scotch tape. Our idea exploits the fact that the speckle pattern generated by a turbid layer is sensitive to the changes in the optical wavefront of an impinging...

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Bibliographic Details
Published inOptics letters Vol. 41; no. 8; p. 1837
Main Authors Kim, KyungDuk, Yu, HyeonSeung, Koh, Joonyoung, Shin, Jung H, Lee, Wonhee, Park, YongKeun
Format Journal Article
LanguageEnglish
Published United States 15.04.2016
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Summary:We present a simple but effective method to measure the pressure inside a deformable microchannel using laser scattering in a translucent Scotch tape. Our idea exploits the fact that the speckle pattern generated by a turbid layer is sensitive to the changes in the optical wavefront of an impinging beam. A change in the internal pressure of a channel deforms the elastic channel, which can be detected by measuring the speckle patterns of a coherent laser beam that has passed through the channel and the Scotch tape. We demonstrate that with a proper calibration, internal pressure can be remotely sensed with the resolution of 0.1 kPa within a pressure range of 0-3 kPa after calibration.
ISSN:1539-4794
DOI:10.1364/OL.41.001837