Diffuse reflectance readhead

Details Diffuse reflectance readhead Diffuse reflectance readhead

H - Electricity

05

B

H05B 33/00 (2006.01) G01J 3/02 (2006.01) G01J 3/12 (2006.01) G01N 21/31 (2006.01) G01N 21/47 (2006.01) G01N 33/49 (2006.01) H01L 27/15 (2006.01)

Patent

CA 2446368

A glucose monitoring system comprising a readhead positioned a predetermined distance from a sample aperture. The readhead comprises first and second LEDs adapted to emit intersecting paths of light. A beam splitter is positioned at the intersection of the light paths. The beam splitter comprises a band pass filter for controlling the center wavelength of a resulting coaxial emitted light for illuminating a sample on the sample aperture. The readhead further comprises a detector which comprises a detector aperture and a molded lens over the detector aperture. A light-scattering section upstream of the lens comprises a plurality of steps having angles greater than 90 degrees to reduce internal stray light.

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