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:
Dec. 07, 2004
Filed:
Oct. 20, 2003
Mark F. Krol, Painted Post, NY (US);
Garrett A. Piech, Horseheads, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
An optical reading system is described herein which can be used to detect the presence of a biological substance (e.g., cell, drug, chemical compound) on a surface of a grating-based waveguide sensor. In one embodiment, the reading system includes a light source (e.g., laser, diode) for directing a light beam into the grating-based waveguide sensor and a detector (e.g., spectrometer, CCD imaging device) for receiving a reflected light beam from the grating-based waveguide sensor and analyzing the reflected light beam so as to detect a resonant wavelength/angle which corresponds to a predetermined refractive index that indicates whether a biological substance is located on the surface of the grating-based waveguide sensor. The grating-based waveguide sensor is tuned to have a resonant wavelength/angle at a predetermined spectral location by adjusting a skew angle defined as an angle between a plane of incidence of the light beam directed into the grating-based waveguide sensor and a grating vector which is perpendicular to the lines of a diffraction grating within the grating-based waveguide sensor. In another embodiment, the reading system is capable of performing a multiplexed interrogation of an array of grating-based waveguide sensors.