US4930863A
Expired / Lapsed
US
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Hollow fiber waveguide and method of making same
Assignee: INDUSTRIAL DEVELOPMENT Ltd
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Filing: 1989-04-24
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Granted: 1990-06-05
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Expires: 2009-04-24
Abstract
Abstract A hollow fiber waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprises a hollow tube, a metal layer on the inner surface of the hollow tube, and a thin dielectric film over the metal layer.
Inventors
- 👤 Natan Croitoriu
- 👤 Jacob Dror
- 👤 Ephraim Goldenberg
- 👤 David Mendelovic
- 👤 Ganot Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:43
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/032
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
43 words
A hollow fiber waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: a hollow tube; a metal layer on the inner surface of the hollow tube; and a thin dielectric film of silver iodide over said metal layer.
Claim 2
Dependent Claim
43 words
A hollow fiber waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: a hollow tube; a metal layer on the inner surface of the hollow tube; and a thin dielectric film of silver iodide over said metal layer.
Claim 3
Dependent Claim
34 words
The waveguide according to claim 1, wherein said metal layer is a thin metal coating of up to 20 microns in thickness, and said thin dielectric film is up to 10 microns in thickness.
Claim 4
Dependent Claim
13 words
The waveguide according to claim 1, wherein said metal coating is of silver.
Claim 5
Dependent Claim
14 words
The waveguide according to claim 1, wherein said hollow tube is a flexible plastic.
Claim 6
Dependent Claim
13 words
The waveguide according to claim 5, wherein said hollow tube is a fluoropolymer.
Claim 7
Dependent Claim
15 words
The waveguide according to claim 1, wherein said hollow tube is quartz, glass or ceramic.
Claim 8
Independent Claim
67 words
A method of making a hollow waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: depositing a thin metal coating on the inner face of a hollow tube by applying to said inner face a solution of a metal salt, and reducing said metal salt by a reducer solution; and depositing a dielectric film of an inorganic material on said metal coating.
Claim 9
Independent Claim
67 words
A method of making a hollow waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: depositing a thin metal coating on the inner face of a hollow tube by applying to said inner face a solution of a metal salt, and reducing said metal salt by a reducer solution; and depositing a dielectric film of an inorganic material on said metal coating.
Claim 10
Dependent Claim
25 words
The method according to claim 7, wherein said metal salt solution is a silver salt solution having a molar concentration of 0.1-1.0 moles/dm 3 .
Claim 11
Dependent Claim
13 words
The method according to claim 7, wherein said metal salt is silver nitrate.
Claim 12
Dependent Claim
26 words
The method according to claim 7, wherein said metal salt solution further includes a buffer of ammonia and acid having a pH of 7.5 to 10.
Claim 13
Dependent Claim
13 words
The method according to claim 7, wherein the reducer solution is hydrazine hydrate.
Claim 14
Dependent Claim
30 words
The method according to claim 7, wherein said dielectric film is deposited on said metal coating by treating the metal coating with a halogen to form a metal halide film.
Claim 15
Dependent Claim
20 words
The method according to claim 12, wherein said metal coating is silver, and said metal halide film is silver iodide.
Claim 16
Dependent Claim
29 words
The method according to claim 7, wherein said metal metal coating is copper, and said dielectric film is formed by oxidizing the copper to produce a copper oxide film.
Claim 17
Dependent Claim
16 words
The method according to claim 14, wherein said copper coating is oxidized by a thermal treatment.
Claim 18
Dependent Claim
16 words
The method according to claim 14, wherein said copper coating is oxidized by a chemical treatment.
Claim 19
Dependent Claim
50 words
A hollow fiber waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: a hollow flexible tube of stainless steel; a thin layer of copper on the inner surface of the stainless steel tube; and a thin dielectric film of copper oxide over said copper layer.
Claim 20
Dependent Claim
50 words
A hollow fiber waveguide particularly useful for transmitting electromagnetic radiation in the infrared and visible range, comprising: a hollow flexible tube of stainless steel; a thin layer of copper on the inner surface of the stainless steel tube; and a thin dielectric film of copper oxide over said copper layer.
Claim 21
Dependent Claim
29 words
The waveguide according to claim 17, wherein said copper layer is up to 20 microns in thickness, and said copper oxide film is up to 10 microns in thickness.
References Cited (Backward Citations)
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