Apparatus for growing crystal fibers
US4421721A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1981 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Oct 2, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1068
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Apparatus for growing crystal fibers comprises a housing, a first drive within the housing for supporting and driving a feed rod, and a second drive within the housing for supporting and driving a fiber. Each of the drives includes a vacuum chuck having first and second support surfaces oriented generally perpendicular and defining a line of intersection, a vacuum provided along the line of intersection for retaining either a rod or a fiber in abutment with the first and second support surfaces, and roller means for driving the rod and fiber along the line of intersection. The apparatus further includes a first laser for generating a laser beam and transmission optics for transmitting the laser beam to the housing. Optics within the housing receives and expands the laser beam into a generally annular configuration and focuses the laser beam on an end of the feed rod. The optics includes a refraxicon portion having inner and outer conical reflecting surfaces for receiving a round laser beam and forming an annular laser beam, an elliptical mirror for receiving the annular laser beam from the refraxicon portion and directing the annular laser beam to a parabolic mirror which focuses t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.