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Radically symmetric hologram and method of fabricating the same

  • US 5,202,775 A
  • Filed: 11/04/1991
  • Issued: 04/13/1993
  • Est. Priority Date: 11/04/1991
  • Status: Expired due to Term
First Claim
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1. A method of fabricating a radially symmetric hologram, having a plurality of concentric fringes of constant radial phase, comprising the steps of:

  • determining a plurality of radial phase transition points and radial phase values between said radial phase transition points for each concentric fringe;

    repeatedly optimizing said plurality of radial phase transition points and said radial phase values to obtain optimized radial phase transition points and optimized radial phase values; and

    fabricating a radially symmetric hologram having concentric fringes of constant radial phase corresponding to said optimized radial phase transition points and said optimized radial phase valueswherein said repeatedly optimizing step comprises repeatedly performing the following steps;

    determining an optical system error function for said hologram;

    changing said plurality of radial phase transition points and radial phase values;

    determining whether said changed plurality of radial phase transition points and radial phase values reduces said optical system error function; and

    retaining said changed radial phase transition points and radial phase values if said error function is reduced.

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