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Microlens arrays having high focusing efficiency

  • US 7,092,165 B2
  • Filed: 12/17/2004
  • Issued: 08/15/2006
  • Est. Priority Date: 07/31/2000
  • Status: Expired due to Term
First Claim
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1. A microlens array comprising a plurality of unit cells and a plurality of microlenses, one microlens per unit cell, wherein:

  • (a) the unit cells are close packed;

    (b) the array has a fill factor of at least 95 percent;

    (c) the array has a focusing efficiency of at least 75 percent; and

    (d) at least two of the microlenses differ from one another randomly.

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