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Collection optics for LED array with offset hemispherical or faceted surfaces

  • US 8,523,387 B2
  • Filed: 09/29/2010
  • Issued: 09/03/2013
  • Est. Priority Date: 10/31/2003
  • Status: Active Grant
First Claim
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1. A lighting module, comprising:

  • an array of LED light sources on a substrate;

    a monolithic structure having multiple lenses for collecting light from the array of multiple LED light sources mounted above the LEDs adjacent the substrate;

    wherein each LED light source emits divergent light, wherein for each LED light source there is a lens in the monolithic structure having a first surface with a compound shape of at least two faceted portions separated by a flat portion that is distributable around the LED light source and arranged to collimate the light from the LED, each faceted portion having at least two facets, formed centrally along perpendicular axes of symmetry with other lenses in a square tile pattern; and

    wherein each lens approximates a spherical or an aspheric shape relative to its respective LED light source.

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