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LED light module for omnidirectional luminaire

  • US 8,360,615 B2
  • Filed: 10/31/2007
  • Issued: 01/29/2013
  • Est. Priority Date: 05/08/2000
  • Status: Expired due to Fees
First Claim
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1. A light module comprising:

  • at least one light emitting diode (LED) for emitting light with wide divergence; and

    a reflective light transformer being rotationally symmetrical and having a vertex located on an axis of symmetry coincident with an optical axis of the LED,wherein in order to obtain high efficiency, a surface profile of the reflective light transformer is defined by an equation
    R

    ;

    θ

    )=F{Is

    );

    Ip

    )}wherein R(α

    ;

    θ

    ) is the surface profile of the reflective light transformer, α

    is an angular coordinate relative to an axis of symmetry of the reflective light transformer belonging to a domain of the LED, θ

    is an angular coordinate relative to an orthogonal axis to the axis of symmetry belonging to a pattern domain, Is is a light source spatial intensity distribution, Ip

    ) is a required intensity distribution across an emitted pattern, and F{ } is an arbitrary functional determined by a method of design, wherein the reflective light transformer collects light emitted by the LED, compresses, redistributes, and directs collected light with high efficiency in an omnidirectional pattern with pre-calculated intensity distribution.

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