| 摘要 |
PURPOSE:To titled burner providing glass fiber having smooth distribution of refraction free from disturbance, by setting a hood at the outside of the tip of the burner, laying a protection member to protect flame from air flow in a reactor at the outside of the hood. CONSTITUTION:In the burner 3 wherein the fine powder 4 of optical glass prepared by the chemical reaction of vapor-phase raw material through oxyhydrogen flame is piled on the powder deposit position 12 in the reactor 1 equipped with the exhaust vent 5, the hood 6 to regulate the extent of flame is set at the outer periphery of the tip of the burner 3, and the protection member 7 to protect flame from air flow in the reactor 1 is laid at the outside of the hood. The hood 6 and the protection member 7 are cylindrical, and the protection member 7 is attached through the spacer 8 to the hood 6. Since flame of the burner is stabilized, optical fiber having smooth distribution of refraction free from disturbance is obtained in good reproducibility. |
