Diagnostic test device including photodetector for scanning...

Details Diagnostic test device including photodetector for scanning... Diagnostic test device including photodetector for scanning...

2007-12-28

2009-11-24

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C073S061690, C422S082050, C422S091000, C436S169000

Reexamination Certificate

active

07622729

ABSTRACT:
A diagnostic test device comprises means for sampling a liquid biological sample. Means is provided for reacting the sample with a reagent to provide one or more visible indicia. A photodetector for scans a detection region to produce a pulsed output indicative of the presence of the one or more indicia. The photodetector is connected to a signal processing circuit for processing the pulsed output. The signal processing circuit produces an output change in response to light intensity variation which is substantially independent of baseline current.

REFERENCES:
patent: 6555060 (2003-04-01), Mauchan et al.
patent: 6960170 (2005-11-01), Kuo
patent: 2002/0144747 (2002-10-01), Devlin, Sr.
patent: 2002/0192833 (2002-12-01), Pan et al.

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