OPTICAL SENSOR AND OPTICAL PROCESS FOR THE CHARACTERIZATION OF A CHEMICAL AND/OR BIO-CHEMICAL SUBSTANCE
First Claim
1. A sensor chip for being used in an optical sensor for the characterization or detection or detection and characterization of at least one chemical or bio-chemical or chemical and bio-chemical substance, comprising a waveguide comprising a substrate and waveguiding material provided thereon, the substrate defining a substrate side of the waveguiding material, a side of the waveguiding material opposed to the substrate side being a cover medium side, and a waveguide grating structure comprising at least one waveguide grating structure unit, wherein the waveguide and the waveguide grating structure are operable to emit light proportions towards the substrate side or the cover medium side or the substrate side and the cover medium side when light impinges on the waveguide grating structure, wherein the waveguide grating structure unit comprises at least two sensing pads, each comprising at least one unidiffractive or multidiffractive grating and a bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substance, and wherein at least one of the following two conditions holds:
- (a) the lightwaves guided in the two sensing pads differ in at least one of their polarization, of their mode number and of their wavelength (b) the bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substances show different specificities or the bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substance of one sensing pad shows no specificity.
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Accused Products
Abstract
The optical sensor contains an optical waveguide (1) with a substrate (104), waveguiding material (105), a cover medium (106) and a waveguide grating structure (101-103). By means of a light source (2), light can be emitted to the waveguide grating structure (101-103) from the substrate side and/or from the cover medium side. (101-103). With means of detection (11), at least two differing light proportions (7-10) radiated from the waveguide (1) can be detected. For carrying out a measurement, the waveguide can be immovably fixed relative to the light source (2) and the means of detection (11). The waveguide grating structure (101-103) itself consists of one or several waveguide grating structure units (101-103), which if so required can be equipped with (bio-)chemo-sensitive layers. The sensor permits the generation of absolute measuring signals.
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Citations
37 Claims
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1. A sensor chip for being used in an optical sensor for the characterization or detection or detection and characterization of at least one chemical or bio-chemical or chemical and bio-chemical substance, comprising
a waveguide comprising a substrate and waveguiding material provided thereon, the substrate defining a substrate side of the waveguiding material, a side of the waveguiding material opposed to the substrate side being a cover medium side, and a waveguide grating structure comprising at least one waveguide grating structure unit, wherein the waveguide and the waveguide grating structure are operable to emit light proportions towards the substrate side or the cover medium side or the substrate side and the cover medium side when light impinges on the waveguide grating structure, wherein the waveguide grating structure unit comprises at least two sensing pads, each comprising at least one unidiffractive or multidiffractive grating and a bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substance, and wherein at least one of the following two conditions holds: -
(a) the lightwaves guided in the two sensing pads differ in at least one of their polarization, of their mode number and of their wavelength (b) the bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substances show different specificities or the bio-chemosensitive or chemosensitive or bio-chemosensitive and chemosensitive substance of one sensing pad shows no specificity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification