Claims
- 1. Apparatus for making preforms for optical waveguides comprising:
- a substantially cylindrical starting member having a smooth outside peripheral surface;
- a coating of particulate carbon without impurities on the outside periphery of said starting member, said carbon being present in an amount which is completely disintegrated during heating to the consolidation temperature of glassmaking particulate material; and
- means for applying said glassmaking particulate material to said starting member to form an adherent coating of glass; whereby the starting member can be removed from said glass by separation at the interface between the carbon and the starting member or shearing within the carbon layer, to produce a preform from the glass.
- 2. The apparatus recited in claim 1 wherein said starting member is tapered.
- 3. The apparatus recited in claim 1 wherein said starting member is an aluminum oxide mendril.
- 4. The apparatus recited in claim 1 wherein the means for applying glassmaking particulate material to said starting member includes;
- means for entraining predetermined amounts of each of a plurality of constituents in a vapor; and
- a burner for oxidizing said vapors in a flame to form a soot having a predetermined composition.
Parent Case Info
This application is a division of application Ser. No. 828,149 filed Aug. 26, 1977.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
3120450 |
Dienfendorf et al. |
Feb 1964 |
|
3775075 |
Keck et al. |
Nov 1973 |
|
3806570 |
Flamenbaum et al. |
Apr 1974 |
|
3823995 |
Carpenter |
Jul 1974 |
|
3933453 |
Barke et al. |
Jan 1976 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
828149 |
Aug 1977 |
|