Upward collapse process and apparatus for making glass preforms

An apparatus for producing large glass preforms with minimal clad to-core waveguide distortion from a glass body having a weight, an outer surface, core rods, and a cladding surrounding and separated from the core rods by a gap. The apparatus includes collars affixed to the top and bottom of the cla...

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Bibliographische Detailangaben
Hauptverfasser:	Ponader, Carl W, Chang, Kai Huei, Green, Evan P, Ma, Qiulin, Beavers, Jr., James E
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING CHEMISTRY COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GLASS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS TESTING TRANSMISSION
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Beschreibung
Zusammenfassung:	An apparatus for producing large glass preforms with minimal clad to-core waveguide distortion from a glass body having a weight, an outer surface, core rods, and a cladding surrounding and separated from the core rods by a gap. The apparatus includes collars affixed to the top and bottom of the cladding; a spacer upon which the core rods rest; a first unit holding and supporting both the bottom collar and the spacer; a second unit holding and supporting the top collar; and a frame defining a heating zone having a heating element to heat the glass body. The weight of the glass body above and below the molten glass in the heating zone is supported by the first and second units without contacting the outer surface of the glass body.