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A quartz glass envelope tube for the preparation of a light guide fiber blank, the tube being in the form of a laminate in which the inner layer consists essentially of quartz glass made from rock crystal and the outer layer of synthetic quartz glass. Good mechanical properties, especially tensile s

A quartz glass envelope tube for the preparation of a light guide fiber blank, the tube being in the form of a laminate in which the inner layer consists essentially of quartz glass made from rock crystal and the outer layer of synthetic quartz glass. Good mechanical properties, especially tensile strength, are thereby achieved.

대표청구항 ▼

Quartz glass envelope tube for the production of a light guide fiber blank, in the form of a laminate, the internal layer consisting essentially of fused rock crystal or quartz sand and the external layer of synthetic quartz glass, the total tube wall thickness of said tube being not greater than 10

Quartz glass envelope tube for the production of a light guide fiber blank, in the form of a laminate, the internal layer consisting essentially of fused rock crystal or quartz sand and the external layer of synthetic quartz glass, the total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total tube wall thickness. A rod for the formation a light guide fiber consisting essentially of: (a) an internal quartz glass rod itself consisting essentially of (1) a core (2) a sheath disposed about said core; and (b) a quartz glass envelope tube disposed about said internal quartz glass rod itself consisting essentially of (1) an internal layer consisting essentially of fused rock crystal or quartz sand; (2) an external layer consisting essentially of synthetic quartz glass, a total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.