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Optical Engineering

Measurements of velocity distribution along depth using low coherence tomography
Author(s): Yoh Imai; Kazuhiro Tanaka; Hiroshi Higo
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Paper Abstract

A new optical measurement method of a flow velocity distribution along the depth using low coherence interference techniques is proposed and demonstrated. In the proposed method, fluctuations of the interference signal formed with the reference and backscattering lights are detected by the optical heterodyne scheme. It is shown experimentally that the width of the spectrum of the interference signal is proportional to the flow velocity. The dynamic range is determined by the time constants of the fast Fourier transform (FFT) processor and lock-in amplifier used in the experiment.

Paper Details

Date Published: 1 April 2000
PDF: 5 pages
Opt. Eng. 39(4) doi: 10.1117/1.602451
Published in: Optical Engineering Volume 39, Issue 4
Show Author Affiliations
Yoh Imai, Kyushu Institute of Technology (Japan)
Kazuhiro Tanaka, Kyushu Institute of Technology (Japan)
Hiroshi Higo, Kyushu Inst. of Technology (Japan)

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