A bio-molecule analyzer including a plurality of test sites on a transparent substrate, each test site having probe molecules attached thereto. An array of addressable light sources are positioned in optical alignment with a corresponding test site. A solution containing sample molecules is positioned in contact with the plurality of test sites. A detector array having a plurality of photodetectors positioned in optical alignment with the array of addressable light sources, one photodetector corresponding to each light source, and a light filter positioned between the detector array and the plurality of test sites for absorbing the light from the light sources and transmitting the light from the test sites to the detector array.

 
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