GROUNDING APPARATUS FOR SHIELDING ELECTROMAGNETIC INTERFERENCE FOR ELECTRONIC APPLIANCE

摘要

A fluorescence sensing device for determining the presence or concentration of an analyte in a liquid or gaseous medium is constructed of a fiber optic plate (12) comprising optical fibers having relatively small numerical apertures. The fiber optic plate is positioned on a photodetector and has a layer of analyte-permeable fluorescent matrix (22) or coated waveguide material on its top surface. The fluorescent matrix or waveguide coating contains indicator molecules whose fluorescence is affected by the local presence of analyte. A light source emits light into the fluorescent matrix in a direction generally parallel to the top surface of the fiber optic plate. Upon absorbing light from the light source, indicator molecules in the fluorescent matrix emit fluorescent light which is transmitted through the fiber optic plate to the photodetector.