Method and apparatus for manufacturing preform for fluoride glas

Details Method and apparatus for manufacturing preform for fluoride glas Method and apparatus for manufacturing preform for fluoride glas

1986-08-15

1988-03-08

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 111, 65 13, 65 29, 65DIG16, C03B 37023

Patent

active

047297778

ABSTRACT:
A method and apparatus is disclosed which ensures highly accurate control of the core-cladding diameter, enabling the fabrication of a preform for the single mode fiber. Moreover, glass refining steps for dehydration, the removal of compound ions, the reduction of the absorption loss by transition metals, etc. and preform manufacturing steps are combined into a series of steps, and the entire manufacturing process can be mechanized and automatically controlled; therefore, the yield rate of product is high and the industrial-scale productivity is also excellent.

REFERENCES:
patent: 4040807 (1977-08-01), Midwinter et al.
patent: 4299609 (1981-11-01), Aulich et al.
patent: 4539032 (1985-09-01), Tran et al.

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