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:
Nov. 06, 2001
Filed:
May. 24, 1999
Guy Voirin, Saint-Aubin, CH;
Rino Kunz, Steinmaur, CH;
CSEM Centre Suisse D'Electronique et de Microtechnique SA, Neuchatel, CH;
Abstract
A biosensor comprises a waveguide into which light is coupled by a diffraction grating. The sample to be analyzed is placed on a reaction region in which a component of the immunological reaction is provided, for example antibodies or antigens. Fluorescence is excited on the surface of the waveguide because of the presence of a marker for example, a labelled antigen or antibody. Fluorescence is decoupled from the waveguide by the coupling diffraction grating or another diffraction grating. The waveguide is made of a material emitting light when it is excited by the marker excitation beam. This latter emission has a peak wavelength different from that of the emission radiation due to the marker used in the immunological reaction. Waveguide material fluorescence emission provides a reference during measurement.