| 摘要 |
PURPOSE:To obtain stably good-quality optical porous glass without disturbing the air current of burners by providing a ventilating pipe to the outer periphery of the burner for synthesizing glass, and enabling the application of the VAD methed while keeping suitable fluidity in a reaction vessel. CONSTITUTION:The titled apparatus consists of an opening part 3 provided at the upper part of a reaction vessel 1 and capable of sucking air, a target 8 for depositing glass which is inserted into the vessel 1 from the opening part 3, an air discharger port 6 provided at the base part 2 of the vessel 1, a burner 7 for synthesizing glass which is inserted into the base part 2 and fixed, and a ventilating pipe 10 which is provided around the burner 7 and used for connecting the inside of the outside of the vessel 1. The VAD method can be carried out by said apparatus while the fluidity in the vessel 1 is appropriately maintained. |
