Fiber optic diffuse light reflectance sensor

Details Fiber optic diffuse light reflectance sensor Fiber optic diffuse light reflectance sensor

G - Physics

01

N

G01N 21/77 (2006.01) G01N 21/47 (2006.01) G01N 21/84 (2006.01) G01N 33/49 (2006.01) G01N 33/493 (2006.01)

Patent

CA 2173014

A fiber optic diffuse light reflectance sensor is disclosed. The sensor employs illumination optical fibers to carry light emitted from a high-intensity, narrow bandwidth LED to a baffle in a readhead where the optical fibers reflect the light off of a reagent test strip. The illumination optical fibers are randomly oriented to create a more uniform light source. The light is reflected off of a pad on a reagent test strip to detect the presence of non-hemolyzed trace and hemolyzed occult blood. The reflected light must pass through another baffle to a bi-convex lens where it is focused onto a detection bundle of optical fibers. The detection bundle is optically coupled with a CCD, where the optical signal is converted to an electrical one for processing and analysis.

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