Positive contrast roadway lighting system
AssigneeChris Walker
InventorsChris Walker, Edward B. Bilson, Rick W. Kauffman
Life of this patent
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Abstract
A luminaire assembly generally includes a reflector having a center of symmetry and a lamp supported within the reflector, wherein the lamp is offset from the reflector center of symmetry, whereby light emitted from the lamp is reflected by the reflector in an asymmetric pattern. In a method of illuminating a roadway having traffic moving in a flow direction, a luminaire having a reflector and a lamp is mounted at a side of the roadway and light emitted from the lamp is reflected with the reflector whereby a greater portion of the reflected light is directed in the traffic flow direction than is directed against the traffic flow direction.
Claims26
A luminaire comprising:
- a reflector having a center of symmetry and including a plurality of curved reflective horizontal bands arranged coaxially in decreasing radial size order along a central z-axis beginning at a central x-y plane, said central z-axis intersecting said central x-y plane to define said center of symmetry, each of said horizontal bands having a planar width and being individually angularly oriented to reflect light at a respective preselected angle, wherein said horizontal bands define a series of flat surfaces;
- and
- a lamp supported within said reflector, said lamp being offset from said reflector center of symmetry in all axes, whereby light emitted from said lamp is reflected by said reflector in an asymmetric pattern, wherein said lamp comprises a tube having a longitudinal axis parallel with said central x-y plane, whereby said lamp tube is horizontally oriented within said reflector.
A luminaire comprising:
- an ovoid reflector having a plane of bi-symmetry and including a plurality of oval curved reflective horizontal bands arranged coaxially in decreasing radial size order along a central z-axis beginning at a central x-y plane, said central z-axis intersecting said central x-y plane to define said center of symmetry, each of said horizontal bands having a width and being individually angularly oriented to reflect light at a respective preselected angle;
- and
- a lamp supported within said reflector, said lamp being offset from said plane of bi-symmetry of said reflector in all axes, whereby light emitted from said lamp is reflected by said reflector in an asymmetric pattern.
Dependencies are inferred from the claim text.