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. 31, 2010
Filed:
Mar. 26, 2008
David D. Nolte, Lafayette, IN (US);
Xuefeng Wang, West Lafayette, IN (US);
David D. Nolte, Lafayette, IN (US);
Xuefeng Wang, West Lafayette, IN (US);
Purdue Research Foundation, West Lafayette, IN (US);
Abstract
A detection system for detecting target material is provided. The system comprises a photonic structure having a reflectance-band and associated side bands; an illumination source for illuminating at a wavelength in at least one of an edge of the reflectance-band and the side bands of the photonic structure and for generating a return beam; a detector system having an intensity-sensitive channel configured to detect an in-line signal from the return beam and a phase-sensitive channel configured to detect a differential phase contrast signal from the return beam; and a processing system for receiving and adding in quadrature the in-line signal and the differential phase contrast signal to generate a joint signal, and for determining one of the presence or the absence of the target material on the photonic structure using the joint signal.