Optics: measuring and testing – Blood analysis
Patent
1982-06-22
1986-03-18
McGraw, Vincent P.
Optics: measuring and testing
Blood analysis
250576, 356442, G01N 3348, G01N 2105
Patent
active
045764778
ABSTRACT:
Particle distribution in a fluid flowing through a microscopic tube is achieved by flowing the fluid vertically-downward through a transparent capillary tube and passing light through the flowing fluid. A linear array of photodiodes responds to light passing through the fluid by registering a series of signals representing the linear projection of particles passing through the plane defined by the light source and the photodiode array. The fluid is supplied from a reservoir which can be selectively pressurized by a gas to control the egress flow rate of fluid. A syringe serves as the egress path from the reservoir and a rotatable stirring rod is disposed in the syringe to stir the egressing fluid. The syringe feeds a disposable assembly which includes a hypodermic needle feeding the capillary tube which is mounted between a microscope slide and cover in the path of the sensing light.
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Francini et al, "Electro-Optical Granulometer for Measurements of Flowing Particles", Optics and Laser Technology, vol. 14, #2, Apr. 1982, pp. 81-85.
Corbet Aaron B.
Holliger Christoph
Strul Bruno
McGraw Vincent P.
The United States of America as represented by the Department of
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