Electro-optical detection system
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United States of America Patent
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Oct 4, 1988
Grant Date -
N/A
app pub date -
Mar 16, 1987
filing date -
Mar 16, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved electro-optical detection system is disclosed capable of use in a fluorescent polarization instrument. In a single or dual channel system, an integrated photodetector/amplifier is combined with a linear charge-balancing voltage-to-frequency converter to produce a digital frequency indicative of the intensity of polarized fluorescence emmited by a chemically treated body fluid sample, such as blood, upon light excitation thereof. A chopper-stabilized amplifier is further connected to the input of the voltage-to-frequency converter for automatically correcting input offset currents and temperature drift. The digital frequency is counted and the data corresponding thereto is transferred via bus connection to a microcomputer for evaluation and display.
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