Method of manufacturing a silica glass preform

  • US 5,244,485 A
  • Filed: 04/24/1992
  • Issued: 09/14/1993
  • Est. Priority Date: 04/30/1991
  • Status: Expired due to Fees
First Claim
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1. A method of manufacturing a silica glass preform comprising the steps of:

  • inserting a rod-like member mainly containing a ductile material, into a forming space of a mold;

    charging a remaining space of the forming space with a forming material containing silica glass powder, or doped silica glass powder;

    compressing the mold charged with the forming material from outside such as to form a porous glass body of the forming material around the rod-like member;

    removing the rod-like member from the porous glass body thereby forming a hole after removal of the rod-like member;

    inserting a glass rod into the hole;

    purifying said porous glass body in which the glass rod is inserted; and

    consolidating said porous glass body purified in the above purifying step.

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