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. 20, 2004
Filed:
Feb. 12, 2003
Applicant:
Inventors:
Gregg D. Sucha, Manchester, MI (US);
Donald J. Harter, Ann Arbor, MI (US);
Almantas Galvanauskas, Ann Arbor, MI (US);
Assignee:
Imra America, Inc., Ann Arbor, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 2/117 ; G01J 5/00 ;
U.S. Cl.
CPC ...
G01N 2/117 ; G01J 5/00 ;
Abstract
An invention is described, which uses terahertz radiation for chemical sensing and gas analysis. Relatively narrow-band THz radiation is generated by impinging an optical pulse train from a short-pulse laser source on a THz emitter. Coherent detection of the resulting THz radiation is accomplished by using a similar optical pulse train to activate the THz sensor. The invention is shown to detect and indicate various concentrations of water vapor in air. Optimal phase biasing conditions give maximum sensitivity to variations in concentration of the species under investigation.