Optical cover employing microstructured surfaces

  • US 8,740,397 B2
  • Filed: 01/17/2012
  • Issued: 06/03/2014
  • Est. Priority Date: 01/18/2011
  • Status: Active Grant
First Claim
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1. An optical cover, comprising:

  • a generally planar layer of optically transparent material having at least one broad corrugated surface, said corrugated surface including highly transparent optical windows distributed according to a predetermined pattern and configured for communicating light to or from said layer;

    wherein the corrugations of said corrugated surface are aligned parallel to a reference line and configured to retroreflect at least some light propagating in said layer by means of a total internal reflection.

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