Development of fiber optic laser Doppler velocimeter for measurement of local blood velocity

Kenkich Ohba; Noboru Fujiwara

doi:10.1117/12.150504

6 August 1993 Development of fiber optic laser Doppler velocimeter for measurement of local blood velocity

Kenkich Ohba, Noboru Fujiwara

Proceedings Volume 2052, Fifth International Conference on Laser Anemometry: Advances and Applications; (1993) https://doi.org/10.1117/12.150504
Event: Laser Anemometry: Advances and Applications: Fifth International Conference, 1993, Koningshof, Veldhoven, Netherlands

Abstract

In order to measure the local velocity field in opaque fluid flows like blood flow, a new laser Doppler velocimeter having a pickup consisting of a small distributed index lens attached to the tips of two fibers which are joined side by side in parallel has been newly developed. The distributed index lens is the shape of a truncated cone. The flow field around this sensor has been measured very precisely by means of an ordinary LDV. The effect of turbidity of fluid on the quality of the laser Doppler signal from this sensor has been examined by experiments. As a result, it has been shown that this LDV sensor has a high signal-to-noise ratio, and that the disturbance against flow by the sensor is very small, and it is very promising as a velocity sensor for opaque or semi-opaque fluid flow like blood flow.

Citation Download Citation

Kenkich Ohba and Noboru Fujiwara "Development of fiber optic laser Doppler velocimeter for measurement of local blood velocity", Proc. SPIE 2052, Fifth International Conference on Laser Anemometry: Advances and Applications, (6 August 1993); https://doi.org/10.1117/12.150504

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