title: Remote sensing of pressure inside deformable microchannels using light scattering in Scotch tape.
abstract: 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.
authors.forename: KyungDuk
authors.initials: K
authors.lastname: Kim
authors.forename: HyeonSeung
authors.initials: H
authors.lastname: Yu
authors.forename: Joonyoung
authors.initials: J
authors.lastname: Koh
authors.forename: Jung H
authors.initials: JH
authors.lastname: Shin
authors.forename: Wonhee
authors.initials: W
authors.lastname: Lee
authors.forename: YongKeun
authors.initials: Y
authors.lastname: Park