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Lighting fixture with controlled photometric light emission

  • US 8,757,850 B2
  • Filed: 02/16/2012
  • Issued: 06/24/2014
  • Est. Priority Date: 03/02/2011
  • Status: Expired due to Fees
First Claim
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1. Lighting fixture (10) having a selected light distribution pattern comprising at least one LED light source (21), whose operation is ensured by a properly sized and designed electronic printed circuit board (20), and at least one housing (30) for containing said LED light source (21) and said electronic printed circuit board (20) and able to obtain a heat dissipation, wherein a lens (25, 26, 27) is placed over said LED light source (21), said lens (25, 26, 27) being selected from the group consisting of three different lenses (25, 26, 27), each of said three different lenses having different surface geometry that achieves a desired light distribution pattern said three lenses (25, 26, 27) being able to direct the light beam emitted from said LED light source (21), in order to obtain uniform illumination on surfaces to provide an illuminated area having a fixed geometry characterized in that:

  • a first lens (27) is placed inside a cover body (23) made of polycarbonate, with a protective film (29) placed between said cover body (23) and said printed circuit board (20), said first lens (27) being positioned in a lighting fixture (10) fixed to a ceiling at 7 meters from the floor to generate an illuminated area on the floor with a square shape, ora second lens (25) is placed inside a cover body (23) made of polycarbonate, with a protective film (29) placed between said cover body (23) and said printed circuit board (20), said second lens (25) being positioned in a lighting fixture (10) fixed to a ceiling at 3 meters from the floor to generate an illuminated area on the floor with a rectangular shape, ora third lens (26) is placed inside a cover body (23) made of polycarbonate, with a protective film (29) placed between said cover body (23) and said printed circuit board (20), said third lens (26 being positioned in a lighting fixture (10) fixed to a ceiling at three meters from the floor to generate an illuminated area on the floor with a square shape.

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