Surface coating for a medical instrument, medical instrument having a surface coating, and method for producing a surface coating for a medical instrument
AssigneeImt Masken Und Teilungen AG
InventorGoetz Thorwarth
Life of this patent
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Abstract
A surface coating for a medical instrument includes an interference filter having at least one dielectric layer and at least one metallic layer arranged one above another. At least one of the at least one metallic layer and the at least one dielectric layer is adapted to be structurally altered by action of a corrosive environment on the surface coating such that the surface coating is convertible from a first state to a second state. In the first state, the surface coating has a first spectral reflectivity. In the second state, the surface coating has a second spectral reflectivity that is different from the first spectral reflectivity.
Claims13
A surface coating for a medical instrument, the surface coating comprising:
- an interference filter having at least one dielectric layer and at least one metallic layer arranged one above another,
- wherein at least one of the at least one metallic layer and the at least one dielectric layer is adapted to be structurally altered by action of a corrosive environment on the surface coating such that the surface coating is convertible from a first state to a second state,
- wherein, in the first state, the surface coating has a first spectral reflectivity and, in the second state, the surface coating has a second spectral reflectivity that is different from the first spectral reflectivity, and
- wherein the first spectral reflectivity has a first reflectivity maximum at a first wavelength, and the second spectral reflectivity has a second reflectivity maximum at a second wavelength, a difference between the second wavelength and the first wavelength being at least 100 nm.
A method for producing a surface coating for a medical instrument, the method comprising:
- providing a medical instrument having a surface;
- and
- producing on the surface an interference filter including at least one dielectric layer and at least one metallic layer arranged one above another,
- wherein at least one of the at least one metallic layer and the at least one dielectric layer is adapted to be structurally altered by action of a corrosive environment on the surface coating such that the surface coating is convertible from a first state to a second state,
- wherein, in the first state, the surface coating has a first spectral reflectivity and, in the second state, the surface coating has a second spectral reflectivity that is different from the first spectral reflectivity, and
- wherein the first spectral reflectivity has a first reflectivity maximum at a first wavelength, and the second spectral reflectivity has a second reflectivity maximum at a second wavelength, a difference between the second wavelength and the first wavelength being at least 100 nm.
A surface coating for a medical instrument, the surface coating comprising:
- an interference filter having at least one dielectric layer and at least one metallic layer arranged one above another,
- wherein at least one of the at least one metallic layer and the at least one dielectric layer is adapted to be structurally altered by action of a corrosive environment on the surface coating such that the surface coating is convertible from a first state to a second state,
- wherein, in the first state, the surface coating has a first spectral reflectivity and, in the second state, the surface coating has a second spectral reflectivity that is different from the first spectral reflectivity, and
- wherein the interference filter includes at least one of a plurality of dielectric layers and a plurality of metallic layers.
Dependencies are inferred from the claim text.