Method of separating and glazing an optical fiber preform
US5979189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01466
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method of manufacturing a preform having a supporting core by effecting successive passes with a plasma torch while material is being supplied, and by effecting at least one glazing step with the plasma torch and without material being supplied includes: PA1 a) a first glazing step effected at slow speed from a first end of the preform to the second end thereof; PA1 b) pre-separation of the preform adjacent to the first end, thereby reducing its diameter to substantially that of the supporting core; PA1 c) a second glazing step effected from the first end to the second end of the preform; and PA1 d) complete separation of the preform at the place of pre-separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.