Method of enlarging end of capillary tube bore
US5152816A · kind A · utility
52Cited by
1References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of forming a tapered aperture at the end of a capillary tube bore. A gaseous etchant such as a fluorine-containing compound flows through the bore and emanates from the first end of the tube. That tube end is heated to create a longitudinal temperature gradient. The gaseous etchant reacts with the tube and enlarges that portion of the bore at the first end. The resultant tapered aperture has a surface smoothness and shape that greatly facilitates the insertion of optical fibers during the fabrication of optical energy transfer devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.