METHOD FOR PRODUCING OPTICAL FIBER BASE MATERIAL
PROBLEM TO BE SOLVED: To provide a method for producing an optical fiber base material capable of preventing glass fine particles from sticking to a gripping part of an upper end of a target material and suppressing the generation of appearance abnormalities.SOLUTION: In a glass fine powder depositi...
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| creator | ASAO MASASHI DAITO HIROSHI SUGANUMA KAZUHIKO MIYAKE HIROSHI ARAI SHINICHI |
| description | PROBLEM TO BE SOLVED: To provide a method for producing an optical fiber base material capable of preventing glass fine particles from sticking to a gripping part of an upper end of a target material and suppressing the generation of appearance abnormalities.SOLUTION: In a glass fine powder depositing device 1 in which a target material 6 is vertically arranged in a reaction chamber 2 where a clean air supplying port 3 and an exhausting nozzle 4 are arranged, the glass fine powder is generated by discharging raw material gas and combustible gas from a burner 5 while supplying a predetermined wind quantity of air from the clean air supplying port, the target material 6 and the burner 5 are relatively removed while rotating the target material 6, thereby the glass fine particle is deposited around the outer periphery of the target material 6 to generate an optical fiber base material, a ratio a/b of a wind speed (a) of the raw material gas discharged from the burner 5 and a wind speed (b) of exhausted gas in the upper end of the target material 6 is less than 40. |
| format | Patent |
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| subjects | CHEMISTRY GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL |
| title | METHOD FOR PRODUCING OPTICAL FIBER BASE MATERIAL |
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