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US 5,313,379 AGranted
Asymmetric sport lighting luminaire
AssigneeQualite Sports Lighting, LLC
InventorsThomas M. Lemons, Kenneth M. Spink
Life of this patent
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AssigneeQualite Sports Lighting, LLC
InventorsThomas M. Lemons, Kenneth M. Spink
Estimating the term…
An asymmetric luminaire for illuminating large outdoor areas, such as an athletic field, wherein glare and light spillage is minimized and controlled. The luminaire includes a reflecting surface of a generally parabolic configuration, and an arc light source is located within the luminaire, the length of the light source being disposed at approximately 45.degree. with respect to the parabolic axis. A visor is used at the peripheral rim of the luminaire to control vertical and lateral light spillage, and the visor includes light source shields to prevent vertical spillage from the upper region of the luminaire. The luminaire reflecting surface includes a plurality of elliptical light reflecting ridges for restricting the near light beam height, and the upper portion of the reflecting surface can include substantially conical concentric light reflecting flute surfaces for accurately directing the light to target locations remote from the luminaire.
A lighting luminaire characterized by its confinement of stray light comprising, in combination, a convex-concave reflector having an inner concave light reflecting surface and a peripheral rim having upper and lateral portions, said reflecting surface having a longitudinal axis, a focal point, an upper portion and a lower portion, a tubular neck defined on said reflector having an axis inclined substantially 45.degree. relative to said reflecting surface axis, a lamp having an axis and having an elongated arc light source having a longitudinal axis substantially parallel to said lamp axis and located within said reflector, said arc light source being located adjacent said reflecting surface focal point and its axis being inclined substantially 45.degree. relative to said reflecting surface axis, said arc light being located within the confines of said reflecting surface as defined by said peripheral rim, a visor attached to said reflector at said peripheral rim having an upper portion extending from said reflector rim upper portion and lateral portions extending from said rim lateral portions, and a first flat light source shield mounted on said visor extending between said visor lateral portions and spaced from said visor upper portion having a plane substantially parallel to said reflecting surface axis, said reflecting surface lower portion including a plurality of adjacent convex elliptical ridges having a substantially vertical major axis whereby light reflected by said ridges will be confined to a beam of restricted height.
Dependencies are inferred from the claim text.