Fluorescent optical sensor

Details Fluorescent optical sensor Fluorescent optical sensor

1995-02-21

1996-05-14

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

With color transmitting filter

422 8207, 2504581, 436172, G01N 2125

Patent

active

055173136

ABSTRACT:
A fluorescence sensor for detecting the presence and amount of an analyte. The fluorescence sensor has a photodetector, a high pass filter located adjacent the photodetector, and a glass layer located adjacent the high pass filter. An indicator layer is located adjacent the glass layer and a light emitting diode is embedded in the indicator layer. The indicator layer has indicator molecules that provide a fluorescent emission as a result of light from the light emitting diode. The indicator layer also allows an analyte to diffuse into it and the presence of the analyte reduces the amount of light emitted from the indicator molecules that passes through the glass layer and the high pass filter and is incident upon the photodetector. Since the amount of current from the photodetector depends upon the incident light, this is used to detect the presence and amount of the analyte. In one embodiment a waveguide is also present.

REFERENCES:
patent: 4003707 (1977-01-01), Lubbers et al.
patent: 4084905 (1978-04-01), Schreiber et al.
patent: 4643877 (1987-02-01), Opitz et al.

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