Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1992-11-24
1994-07-26
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
128633, 12866108, 2503561, G01P 336, A61B 500, G01F 100
Patent
active
053330447
ABSTRACT:
A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.
REFERENCES:
patent: 4919536 (1990-04-01), Komine
patent: 5110204 (1992-05-01), Miles et al.
patent: 5153665 (1992-10-01), Weinstein
patent: 5208651 (1993-05-01), Buican
Shaffer et al., "Flow Visualization of the Novacor Left Ventricular Assist ystem", Proceedings of the Cardiovascular Science and Technology Conf., Dec. 2-4, 1991.
Woodard et al., "Optimal Management of a Ventricular Assist System: Contribution of Flow Visualization Studies", Proceedings of the American Society of Artificial Internal Organs, May 6-9, 1992.
Shaffer et al., "Fluorescent Image Tracking Velocimetry Applied to the Novacor Left Ventricular Assist Device", Proceedings of the ASME Fluids Engineering Meeting, Jun. 21-23, 1992.
Buczinski Stephen C.
Fisher Robert J.
Glenn Hugh W.
Moser William R.
The United States of America as represented by the Department of
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