×

Method for lowering index of refraction of glass surfaces

  • US 3,320,114 A
  • Filed: 07/31/1963
  • Issued: 05/16/1967
  • Est. Priority Date: 07/31/1963
  • Status: Expired due to Term
First Claim
Patent Images

1. A METHOD FOR PREPARING AN OPTICAL FIBER WHICH COMPRISES TREATING A SUBSTANTIALLY PRE FUSED SILICA FIBER HAVING A THICKNESS FROM ABOUT 250,000 TO 750,000 ANGSTROM UNITS WITH AN AQUEOUS CHLORIDE SOLUTION SELECTED FROM THE GROUP OF ALKALI AND EARTH ALKALI CHLORIDES IN ADMIXTURE WITH A WETTING AGENT, DRYING THE TREATED FIBER TO FORM A CHLORIDE COATING ON THE FIBER SURFACE, AND FIRING THE COATED FIBER AT A TEMPERATURE SUFFICIENT TO CAUSE IN SITU REACTION OF THE CHLORIDE COATING WITH THE PURE SILICA FIBER TO A DEPTH OF ABOUT 3,000 TO 4,000 ANGSTROM FOR PRODUCING A GLASS LAYER HAVING AN INDEX OF REFRACTION DIFFERENT FROM PURE SILICA.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×