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Lighting Device Utilizing a Double Fresnel Lens

  • US 20150204491A1
  • Filed: 10/29/2014
  • Published: 07/23/2015
  • Est. Priority Date: 01/21/2014
  • Status: Active Grant
First Claim
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1. An optical lens comprising:

  • a substrate having a first side and a second side opposite the first side;

    a first pattern of Fresnel features having a first focal length disposed on the first side; and

    a second pattern of Fresnel features having a second focal length disposed on the second side;

    wherein the first pattern of Fresnel features is disposed perpendicular to the second pattern of Fresnel features, andwherein the first focal length is different from the second focal length.

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