Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1990-11-30
1992-12-01
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 13, 65110, C03B 37075
Patent
active
051676842
ABSTRACT:
A process for producing an optical fiber comprising the following stages: a stage of production of a preform having an axis of symmetry and their ends and comprising an optical core as well as at least one cylindrical recess whose axis is parallel to the axis of symmetry of the preform; a drawing stage at a temperature making possible the softening of the drawn part of the preform to obtain a hollow optical fiber, characterized in that it comprises, after the preceding stage of production of the preform: a stage of attachment in a tight manner, to one end of the preform, of a hollow chamber whose cavity communicates with the recess of the preform. The cavity also communicates with a pneumatic regulation device. The drawing stage comprises a pneumatic regulation of the gas contained in the cavity and in the recess with the help of the pneumatic regulation device.
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Le Pesant Jean-Pierre
Turpin Marc
"Thomson-CSF"
Lindsay Robert L.
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