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1. US20120182552 - Optical sensor and method for detecting molecules

Office United States of America
Application Number 13382267
Application Date 18.06.2010
Publication Number 20120182552
Publication Date 19.07.2012
Grant Number 08823947
Grant Date 02.09.2014
Publication Kind B2
IPC
G01B 9/02
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers
CPC
G01N 21/7746
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77by observing the effect on a chemical indicator
7703using reagent-clad optical fibres or optical waveguides
7746the waveguide coupled to a cavity resonator
G01N 21/39
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
39using tunable lasers
G01N 2021/1721
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1717with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
1721Electromodulation
G01N 2021/1731
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
1717with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
1731Temperature modulation
G01N 2021/7779
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
77by observing the effect on a chemical indicator
7769Measurement method of reaction-produced change in sensor
7779interferometric
Applicants Heidrich Helmut
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Lútzow Peter
Venghaus Herbert
Hoekstra Hugo Joseph Wilhelmus Maria
Inventors Heidrich Helmut
Lútzow Peter
Venghaus Herbert
Hoekstra Hugo Joseph Wilhelmus Maria
Agents Schwegman Lundberg & Woessner, P.A.
Priority Data 09075286 01.07.2009 EP
Title
(EN) Optical sensor and method for detecting molecules
Abstract
(EN)

The invention relates to an optical sensor comprising an optical waveguide (1) and a light-sensitive element (4) for detecting light coupled out of the waveguide (1) and also various ring resonators (2), the ring resonators (2) being coupled optically to the mentioned waveguide (1) and, with the exception of at most one of the ring resonators (2), each having a means (5) for adjusting resonance frequencies of the respective ring resonator (2) and/or of the coupling between the ring resonator (2) and the waveguide (1) and at least two of the ring resonators (2) having different optical lengths in an initial state and being disposed for having their resonance frequencies influenced by means of different variables to be measured which are specific for each of these ring resonators (2). The invention refers furthermore to a method which can be implemented with a sensor of this type for detecting molecules of at least one substance.

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