Method for increasing the index of refraction of a glassy material

  • US 5,500,031 A
  • Filed: 12/14/1994
  • Issued: 03/19/1996
  • Est. Priority Date: 05/05/1992
  • Status: Expired due to Fees
First Claim
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1. A method for increasing the index of refraction of selected portions of a body comprising glass comprising the steps of:

  • providing a body comprising glass;

    diffusing hydrogen or deuterium into at least the portions of said glass whose refractive index is to be increased wherein said diffusing is effected by exposing said glass to said hydrogen or deuterium at a temperature in the range 21°

    -150°

    C.; and

    locally selectively heating said portions of said glass to a temperature greater than about 500°

    C. to selectively increase the refractive index of said portions.

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