Optical flow sensor

Details Optical flow sensor Optical flow sensor

G - Physics

01

F

73/132, 73/59

G01F 3/00 (2006.01) A61M 5/168 (2006.01) G01F 13/00 (2006.01)

Patent

CA 1268053

ABSTRACT OF THE DISCLOSURE An improved optical flow sensor for optically de- tecting and measuring the flow of a fluid through a drip chamber assembly. The sensor comprises an optical energy- emitting chip sealed within a first lens block having a refracting lens in one surface and an optical energy de- tecting chip sealed within a second lens block having a refracting lens in one surface. The two lens blocks are positioned on the two parallel arms of a a "U"-shaped base with their lens surfaces facing each other across the open space between the arms of the "U". The drip chamber as- sembly has transparent walls defining a drip chamber, and the lenses compensate for the refractive effects of the walls of the drip chamber assembly on the optical energy passing through. As drops of fluid fall trough the cham- ber, they intersect the optical energy passing through the chamber and produce a corresponding output signal from the detector.

503094

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