Porous glass body and method for producing glass preform
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United States of America Patent
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Feb 16, 2016
Grant Date -
Sep 3, 2015
app pub date -
Feb 28, 2014
filing date -
Feb 28, 2014
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Abstract
One embodiment provides a porous glass body which is obtained by depositing plural deposited layers of glass fine particles on a starting material in a layered manner by relatively reciprocating a burner for glass-fine-particle synthesis and the starting material. In the porous glass body, a porosity in a layer at the deposited layers falls within a range of 40% to 90%, and the porosity in the layer decreases from a central side toward an outer side in a radial direction thereof.
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