US4173459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a light conducting fiber
Assignee: Siemens AG
•
Filing: 1977-08-26
•
Granted: 1979-11-06
•
Expires: 1997-08-26
Abstract
Abstract A method of producing a light conducting fiber by providing a rotating, heatable crucible having a cylindrical interior wall, successively depositing optical material forming layers from a liquid phase with the first layer being deposited on the interior wall of the rotating crucible and subsequent layers being deposited on a previous deposited layers, transforming each layer into a film of optical material to form a workpiece having a plurality of concentric cylindrical films of optical materials, and subsequently pulling the fiber from the workpiece while it is still in the crucible.
Inventors
- 👤 Hubert Aulich
- 👤 Josef Grabmeier
- 👤 Hans Pink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/016; C03B37/02; C03B37/022; C03B37/023; C03B37/025; C03B37/027; Y; Y10; Y10S; Y10S65/00; Y10S65/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
A method for producing a light conducting fiber, particularly a gradient glass-like fiber having a radially changing index of refraction, said method comprising providing a rotating, heatable crucible having a cylindrical interior wall; successively depositing glass forming layers from a liquid phase with the first layer being deposited on the interior wall of the rotating crucible and the subsequent layers being deposited on previously deposited layers, by providing a liquid phase consisting of a water-free solution having compounds of glass forming oxides of at least one element selected from a group consisting of Se, Te, P, As, Si, Ge, Sn, Pb, Ti, B, Al, Mg, Ca, Sr, Ba, Li, Na, K and Rb, and said solution having a solution medium selected from a group consisting of lower ketones, lower alcohols, esters of lower alcohols with lower carboxylic acid and combinations thereof; then thermally decomposing each layer into a glass film; to form a workpiece having a plurality of concentric, cylindrical glass films; and subsequently pulling a fiber from said workpiece.
Claim 2
Independent Claim
170 words
A method for producing a light conducting fiber, particularly a gradient glass-like fiber having a radially changing index of refraction, said method comprising providing a rotating, heatable crucible having a cylindrical interior wall; successively depositing glass forming layers from a liquid phase with the first layer being deposited on the interior wall of the rotating crucible and the subsequent layers being deposited on previously deposited layers, by providing a liquid phase consisting of a water-free solution having compounds of glass forming oxides of at least one element selected from a group consisting of Se, Te, P, As, Si, Ge, Sn, Pb, Ti, B, Al, Mg, Ca, Sr, Ba, Li, Na, K and Rb, and said solution having a solution medium selected from a group consisting of lower ketones, lower alcohols, esters of lower alcohols with lower carboxylic acid and combinations thereof; then thermally decomposing each layer into a glass film; to form a workpiece having a plurality of concentric, cylindrical glass films; and subsequently pulling a fiber from said workpiece.
Claim 3
Dependent Claim
39 words
A method according to claim 1, wherein the step of providing the liquid phase includes dissolving at least one of the elements of said group in an acid selected from a group consisting of monocarboxylic acid and dicarboxylic acid.
Claim 4
Dependent Claim
47 words
A method according to claim 1, wherein the element selected from the group of elements is in a compound of a metal halide and wherein an anion of the halide is partially substituted by a radical selected from a group of monocarboxylic acid and dicarboxylic acid radicals.
Claim 5
Dependent Claim
35 words
A method according to claim 3, which further includes that anions of the halides are additionally partially substituted by radicals selected from a group of hydroxyl radical, alcoholate radical of lower alcohols and combinations thereof.
Claim 6
Dependent Claim
36 words
A method according to claim 1 which further includes subsequently to the step of pulling a fiber from the workpiece, depositing a protective cladding of synthetic material from an additional liquid phase on the pulled fiber.
References Cited (Backward Citations)
DE2645375A1
Cited
US3932162A
Cited
DE2447353A1
Cited
US4061484A
Cited
DE2637937A1
Cited
US4065280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |