Optical sensor for determining at least one parameter in a liquid or gaseous sample
First Claim
1. An optical thin-film sensor for determining at least one parameter in a liquid or gaseous sample, comprising:
- a polymer support film which is transparent to both excitation and emission radiation;
a thin, transparent layer of a thermoplastic material adhered to said polymer film;
an optically transparent hydrogel layer which covers said thermoplastic layer; and
carrier particles having a diameter and a thickness with a fluorescent indicator immobilized thereon, a first part of said carrier particles being bonded to said thermoplastic material, having thermosetting properties after said carrier particles have been pressed in, and a second part of said carrier particles extending into said optically transparent hydrogel layer, said hydrogel layer being mechanically anchored by said carrier particles.
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Accused Products
Abstract
In order to improve the response behavior of an optical sensor for determining at least one parameter in a liquid or gaseous sample, the sensor including a substrate which is provided with carrier particles and a fluorescent indicator immobilized thereon, the substrate is configured as a polymer film transparent to both excitation and emission radiation, and the individual carrier particles carrying the fluorescent indicator in immobilized form are bonded with only part of their surface to a thin layer of a thermoplastic material adhering to the polymer film and assume thermosetting properties after the carrier particles have been pressed in, whereas the other part of the surface of the carrier particles extend into an optically transparent hydrogel layer which covers the thermoplastic layer and in which the carrier particles are anchored mechanically. Such sensors may easily be attached to the end of an optical waveguide and may be made in any size by a simple punching operation.
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Citations
13 Claims
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1. An optical thin-film sensor for determining at least one parameter in a liquid or gaseous sample, comprising:
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a polymer support film which is transparent to both excitation and emission radiation; a thin, transparent layer of a thermoplastic material adhered to said polymer film; an optically transparent hydrogel layer which covers said thermoplastic layer; and carrier particles having a diameter and a thickness with a fluorescent indicator immobilized thereon, a first part of said carrier particles being bonded to said thermoplastic material, having thermosetting properties after said carrier particles have been pressed in, and a second part of said carrier particles extending into said optically transparent hydrogel layer, said hydrogel layer being mechanically anchored by said carrier particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification