Luminaire lens
AssigneeAcuity Brands, Inc.
InventorsPanchadsaram Arumugasaamy, Gregory J. Subisak
Life of this patent
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Abstract
An open type luminaire lens including a non-circular reflective lens having a metalized exterior surface and a prism section, the non-circular reflective lens having a shape generally defined by the combination of two parabolas, the prism section including and array of external reflecting prisms of varying predetermined shapes and varying predetermined sizes for use in providing a desired efficient light distribution.
Claims20
An open type luminaire lens, comprising a reflective lens having a substantially elliptical aperture and having an external surface reflecting light emanating from internally of the lens through the aperture, the conformation of the lens in a plane perpendicular to the aperture having a shape generally defined by the combination of two parabolas, the lens further having a prism section covering at least twenty-five percent thereof, said prism section including an array of external reflecting prisms of varying predetermined shapes and varying predetermined sizes whereby a desired efficient light distribution is produced.
An open type luminaire lens comprising:
- a non-circular reflective lens having a metalized exterior surface and a prism section, said non-circular reflective lens having a shape generally defined by the combination of two parabolas, said prism section including an array of external reflecting prisms of varying predetermined shapes and varying predetermined sizes, said predetermined shapes and predetermined sizes defined by the relationship of angles A, B and P where angle A is defined by a counter clockwise angle from the leading point of a first prism to the convergence point of said first prism and a next adjoining prism, angle B is defined by a clockwise angle from the leading point of said first prism to the convergence point of said first prism and said next adjoining prism and angle P is
- starts along minor axis (x=0) and has a value of 90 degrees along the major axis y=0 with angle A, angle B and angle P having the following relationship:
- Angle A=21.305Ln(P)−41.714;
- for values of 10≦P≦44 degrees;
- and
- Angle A=(−0.0078)P2+0.9513P−4.6875;
- for values 46≦P≦90 degrees
- Angle B=0.0049P2−0.7615P+91.437;
- for 0≦P≦44degrees;
- and
- Angle B=0.0075P2−0.9243P+93.869;
- for values 46≦P≦88 degrees.
An open type luminaire lens system for maximizing light distribution comprising:
- an open type reflective luminaire lens having a generally elliptical shape, said luminaire lens having a metalized exterior surface;
- an external prism section disposed on said luminaire lens having external reflecting prisms of varying predetermined sizes and varying predetermined shapes whereby desired light distributions of different types can be produced by changing the sizes and shapes of said external reflecting prisms whereby the shape of the open type reflective luminaire lens is defined by the surface envelope general equation
- x2/a2+y2/b2=1 with z= being in a range from 0.0 to 11.0, a in a range from 3.0 to 12.0 and b in a range from 3.0 to 12.0.
Dependencies are inferred from the claim text.