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Cylindrical lens with refractive optical element and diffractive optical element

  • US 8,553,330 B1
  • Filed: 01/22/2008
  • Issued: 10/08/2013
  • Est. Priority Date: 11/21/2003
  • Status: Active Grant
First Claim
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1. A cylindrical lens comprising:

  • a refractive optical element with a spherical surface;

    a diffractive optical element; and

    a further functional element, wherein said diffractive optical element together with said spherical surface define an aspheric cylindrical lens and said further functional element produces an image that permits said cylindrical lens to be aligned relative to at least one of a light source and an external pattern.

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