NDLI: Laser Doppler Measurements of Localized Pulsatile Fluid Velocity

Content Provider	IEEE Xplore Digital Library
Author	Morikawa, Satsuki Lanz, Otto Johnson, Curtis C.
Copyright Year	1964
Abstract	An optical Doppler velocimeter utilizing optical heterodyning techniques was used to measure radial velocity profiles of pulsatile flow in a cardiovascular circulation model. The light source was a single-mode frequency-stabilized He-Ne CW laser (6328 Å, 0.1 mW). The laser beam was focused to a 30-¿m in diameter spot in the flow stream. Polystyrene spheres 0.73 ¿m in diameter, suspended in distilled water, were used as light scatterers. The optical signal beam contained Doppler-shifted scattered light. The reference beam was split from the source beam in one configuration; in a second configuration an acoustical frequency modulator was installed in the reference beam pathway as part of a directional flow measurement system. The circulation model consisted of an artificial heart, a Windkessel model, a peripheral resistance, a capillary model, a reservoir, and an optical glass window section. The flow test section was positioned by a three-dimensional finely adjustable holder. From 10 to 34 point measurements were obtained to plot one velocity profile, which covered 95 percent of the tube diameter.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	5
File Size	2606763
Starting Page	416
Ending Page	420
File Format	PDF
ISSN	00189294
Volume Number	BME-18
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1971-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Doppler measurements Optical scattering Acoustic beams Optical mixing Laser beams Laser modes Optical modulation Fluid flow measurement Velocity measurement Frequency
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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