Optical sensor
First Claim
1. An optical sensor for determining at least one of a physical parameter and a chemical parameter of a gas sample, comprising:
- at least one optical transmitter;
at least one optical receiver;
an evaluation unit arranged downstream of the receiver; and
a gas-sensitive element which is arranged in a beam path between the transmitter and the receiver and is exposable to the gas sample, and which changes at least one of a absorption index and a refractive index for electromagnetic radiation of a specific wavelength in a reversible manner in response to a change in parameters of the gas sample, the gas-sensitive element including an indicator substance in a polymer matrix, the transmitter and the receiver being coupled to the gas-sensitive element via at least one optical waveguide, wherein;
the optical transmitter, the optical receiver, and the gas-sensitive element are matched to a wavelength range, the receiver includes a photodiode, the gas-sensitive element includes a gas-sensitive layer that changes at least one of the absorption index and the refractive index for electromagnetic radiation in response to contact with a gas or gas mixture, the at least one optical waveguide, at an end thereof facing away from the receiver and the transmitter, is chamfered and provided with the gas-sensitive layer, and the end of the at least one optical waveguide facing away from the receiver and the transmitter includes a peak having a peak angle of 90°
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1 Assignment
0 Petitions
Accused Products
Abstract
An optical sensor is provided for determining a physical and/or chemical parameter of a sample, having at least one optical transmitter and at least one optical receiver, and having a sensitive element which is arranged in a beam path between the transmitter and the receiver and is exposable to the sample, and which changes its absorption and/or its refractive index for electromagnetic radiation of a specific wavelength in response to a change in parameters of the sample, in particular, a gas-sensitive element, and possibly having an evaluation unit arranged downstream of the receiver. The transmitter and the receiver can be coupled to the sensitive element via at least one optical waveguide.
Provision is made for the transmitter (12) and for the receiver (14) to be coupled to the sensitive element via at least one optical waveguide (26, 28).
24 Citations
26 Claims
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1. An optical sensor for determining at least one of a physical parameter and a chemical parameter of a gas sample, comprising:
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at least one optical transmitter;
at least one optical receiver;
an evaluation unit arranged downstream of the receiver; and
a gas-sensitive element which is arranged in a beam path between the transmitter and the receiver and is exposable to the gas sample, and which changes at least one of a absorption index and a refractive index for electromagnetic radiation of a specific wavelength in a reversible manner in response to a change in parameters of the gas sample, the gas-sensitive element including an indicator substance in a polymer matrix, the transmitter and the receiver being coupled to the gas-sensitive element via at least one optical waveguide, wherein;
the optical transmitter, the optical receiver, and the gas-sensitive element are matched to a wavelength range, the receiver includes a photodiode, the gas-sensitive element includes a gas-sensitive layer that changes at least one of the absorption index and the refractive index for electromagnetic radiation in response to contact with a gas or gas mixture, the at least one optical waveguide, at an end thereof facing away from the receiver and the transmitter, is chamfered and provided with the gas-sensitive layer, and the end of the at least one optical waveguide facing away from the receiver and the transmitter includes a peak having a peak angle of 90°
.- 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)
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Specification