초록 ▼

A method of fabricating a porous glass rod having a reaction vessel including an elevational passage from an exhaust port of the vessel side and the top of the vessel over the interior and a burner mounted at the end in the vessel for forming glass fine particles, and a target elevationally movable

A method of fabricating a porous glass rod having a reaction vessel including an elevational passage from an exhaust port of the vessel side and the top of the vessel over the interior and a burner mounted at the end in the vessel for forming glass fine particles, and a target elevationally movable and rotatably inserted from the passage into the vessel which has injecting to accumulate glass fine particles produced through the burner to form the porous glass rod at the lower end of the target rotated at a predetermined position in the reactor, and drawing the target in response to the growing velocity of the porous glass rod, wherein downward gas stream is produced along the outer periphery of the conduit in the vessel. The method is conducted by an apparatus for fabricating the glass rod. The method and apparatus can stabilize the fluidity in a reaction vessel to stabilize the outer diameter and the refractive index distribution of the glass rod in the longitudinal direction.

대표청구항 ▼

A method of fabricating a porous glass rod in a reaction vessel including a first passage at the top of the vessel, an exhaust port in one wall of the vessel and a burner mounted at the lower end in the vessel for forming fine glass particles, comprising the steps of: introducing a target into said

A method of fabricating a porous glass rod in a reaction vessel including a first passage at the top of the vessel, an exhaust port in one wall of the vessel and a burner mounted at the lower end in the vessel for forming fine glass particles, comprising the steps of: introducing a target into said passage and rotating the target; accumulating fine glass particles produced by the burner to form a porous glass rod at the lower end of the target rotated at a predetermined position in the reactor; drawing the target out of the reaction vessel through said passage in response to growth of the porous glass rod; and introducing a gas stream into the reaction vessel through a second passage separate from and outwardly concentric with respect to said first passage and having a constant flow resistance.