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US 8,576,400 B2Granted
Optoelectronic methods and devices for detection of analytes
Assignee3M Innovative Properties Company
InventorsJohn C. Hulteen, Kiran S. Kanukurthy, Neal A. Rakow, Andrzej F. Rybacha, Richard L. Rylander, Arthur Scheffler, Zeljko Zupanc
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Abstract
Herein are disclosed optoelectronic methods and devices for detecting the presence of an analyte. Such methods and devices may comprise at least one sensing element that is responsive to the presence of an analyte of interest and that may be interrogated optically by the use of at least one light source and at least one light detector.
Claims19
A method of monitoring an analyte in an atmosphere, comprising:
- a) exposing at least one sensing element to an atmosphere potentially containing an analyte for a period of time;
- b) directing light in a first wavelength range onto the at least one sensing element and obtaining a first signal that is representative of an amount of light in the first wavelength range reflected from the at least one sensing element;
- c) directing light in a second wavelength range onto the at least one sensing element and obtaining a second signal that is representative of the amount of light in the second wavelength range reflected from the at least one sensing element;
- d) comparing the first and second signals to provide a compared signal;
- and,
- e) correlating the compared signal to a predetermined response curve and thereby obtaining a concentration value that is associated with the concentration of the analyte in the monitored atmosphere.
3 more elements
Dependencies are inferred from the claim text.