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:
Aug. 30, 2011
Filed:
Jan. 29, 2009
Isaac Shpantzer, Bethesda, MD (US);
Jacob Khurgin, Baltimore, MD (US);
Arkady Kaplan, Rockville, MD (US);
Pak Shing Cho, Gaithersburg, MD (US);
Yaakov Achiam, Rockville, MD (US);
Isaac Shpantzer, Bethesda, MD (US);
Jacob Khurgin, Baltimore, MD (US);
Arkady Kaplan, Rockville, MD (US);
Pak Shing Cho, Gaithersburg, MD (US);
Yaakov Achiam, Rockville, MD (US);
CeLight, Inc., Silver Spring, MD (US);
Abstract
A photo-thermal, interferometric spectroscopy system is disclosed that provides information about a chemical, such as explosives and the like, at a remote location. It may be used for solid residue detection on a surface. The system includes a novel light detector system with a matrix of optical elements focusing portions of a received light beam on input waveguides of an optical combiner. The combiner adjusts the phases of the received beam portions and combines them together to maximize the intensity of an output beam. The output beam is detected by a detector, and information about at least one of, absorption spectrum and concentration of the chemical is recovered. In the preferred embodiment the detector is a coherent detector based on 90-degrees optical hybrid.