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Lens system for photodetectors

  • US 6,194,704 B1
  • Filed: 07/27/2000
  • Issued: 02/27/2001
  • Est. Priority Date: 11/25/1998
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • forming a plurality of stacked layers of sol-gel material;

    forming a stepped configuration in said stacked layers by progressively removing portions of a plurality of said layers; and

    forming a diffractive lens from said sol-gel layers and positioning said lens over a photodetector.

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