| 摘要 |
A method and apparatus for manufacturing a soot preform utilizing a large, preferably hollow, bait rod having a diameter of greater than about 18 mm, and optimally between 25 mm - 35 mm. In accordance with the invention, capture rate during startup is at least about 30%. The method comprises installing a bait rod having an outer diameter greater than about 18 mm, generating a soot stream of core soot, and depositing the core soot onto an outer surface of the bait rod. According to another embodiment, the ratio of bait rod diameter (db) to soot stream dimension (ds) is between about 2-5. |
