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Formation of features in optical material

  • US 4,598,039 A
  • Filed: 07/02/1984
  • Issued: 07/01/1986
  • Est. Priority Date: 07/02/1984
  • Status: Expired due to Term
First Claim
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1. A method of making an article characterized by steps comprising:

  • (1) forming a surface pattern in an optical material by a first application of radiant electromagnetic energy that selectively removes a surface layer of said optical material, and(2) subsequently removing at least one additional layer of optical material underlying said surface layer by at least one additional application of radiant electromagnetic energy at a power density below the threshold at which a surface layer is removed from said optical material.

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