The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2010
Filed:
Apr. 11, 2008
Xin Zhou, Rancho Cucamonga, CA (US);
Xiang Liu, Phoenix, AZ (US);
Alfred Feitisch, Los Gatos, CA (US);
Gregory M. Sanger, Chico, CA (US);
Xin Zhou, Rancho Cucamonga, CA (US);
Xiang Liu, Phoenix, AZ (US);
Alfred Feitisch, Los Gatos, CA (US);
Gregory M. Sanger, Chico, CA (US);
SpectraSensors, Inc., Rancho Cucamonga, CA (US);
Abstract
A differential absorption spectrum for a reactive gas in a gas mixture can be generated for sample absorption data by subtracting background absorption data set from the sample absorption data. The background absorption data can be characteristic of absorption characteristics of the background composition in a laser light scan range that includes a target wavelength. The differential absorption spectrum can be converted to a measured concentration of the reactive gas using calibration data. A determination can be made whether the background composition has substantially changed relative to the background absorption data, and new background absorption data can be used if the background composition has substantially changed. Related systems, apparatus, methods, and/or articles are also described.