Medical test reaction area reflected light photometric device

Details Medical test reaction area reflected light photometric device Medical test reaction area reflected light photometric device

1982-08-31

1985-06-18

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

With diffusion

250228, 250237R, 356448, G01N 2147, G01J 106

Patent

active

045238537

ABSTRACT:
A device for reflected-light photometry, that determines the reflectivity of a specimen area which is part of an objective area specifically dedicated for the determination of certain properties, especially those of the reaction area of a medical-laboratory test strip. The device has a light source for illuminating the specimen area, preferably with diffuse light, and a photodetector that picks up light reflected from the specimen area. There is, in accordance with the invention, an opaque diaphragm with a particular shape, position, and mounting in the path of light between the specimen area and the detector.

REFERENCES:
patent: 2358020 (1944-09-01), Miller
patent: 2688099 (1954-08-01), Bickley
patent: 3327583 (1967-06-01), Vanderschmidt et al.
Arbeitsprinzip des Seralyzer.RTM. pp. 6 & 7.
Blitzer et al., "Apparatus for Measuring the Reflectance of a Sample", Research Disclosure (Oct. 1978), pp. 61-62.

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