Method and device for manufacturing an optical preform
US9051205B2 · kind B2 · utility
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58References
7Claims
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Assignee
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Key dates
| Filing date | Dec 19, 2009 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Aug 8, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01823
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a method and device for manufacturing an optical preform. The method includes supplying dopant-containing glass-forming gases to the interior of a hollow glass substrate tube. Furthermore, the supply flow of dopant-containing glass-forming gases includes a main gas flow and one or more secondary gas flows. The secondary gas flows are divided into subflows, which are supplied to the interior of the hollow glass substrate tube together with the main gas flow. The method further includes effecting deposition of glass layers on the interior surface of the hollow glass substrate tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.