Method for flame abrasion of glass preform
US5685889A · kind A · utility
8Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1994 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Apr 15, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01257
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An optical fiber glass preform is preheated so that it is uniformly preheated therethrough, then a surface of the preform is abraded by an oxyhydrogen flame to obtain a smooth optical fiber glass preform. This method is advantageous when relatively larger diameter preforms are treated in this manner because the step of uniformly preheating the preform reduces or eliminates a temperature differential therein. The temperature differential could otherwise cause the preform to crack during cooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.