Asymmetric alternating prism arrays
AssigneeReflexite Corporation
InventorsJames F. Munro, John A. Futhey
Life of this patent
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Abstract
A luminaire is provided which includes a light source, a light guide that receives light radiating from the light source, and a plurality of prisms adjacent the light guide that redirect the light from the light guide substantially perpendicular to a longitudinal axis of the light guide. The prism angles, in one embodiment, are 25°-90°-65°. The fine pitch prism arrays preferably alternate or flip-flop every few millimeters, for example, one to two millimeters to create the visual appearance of bright and dark bands which cause the structure to appear like macro prisms.
Claims25
A luminaire, comprising:
- a light source;
- a light guide that receives light radiating from the light source;
- and
- a tilted prism array for redirecting the light in a first direction, wherein the prism array includes a cross-sectional profile that periodically alternates orientation along the light guide, the prism array including peaks and valleys, substantially all of the peaks being disposed in about a single plane.
A luminaire comprising:
- a light source;
- a light guide that receives light radiating from the light source;
- and
- a tilted prism array for redirecting the light exiting the light guide, the prism array including a cross-sectional profile that periodically alternates orientation along a first axis, the prism array including peaks and valleys, substantially all of the peaks being disposed in about a single plane.
A method for redirecting light comprising:
- providing a light source;
- receiving light radiating from the light source in a light guide;
- and
- redirecting the light in a first direction with a tilted prism array that includes a cross-sectional profile that periodically alternates orientation along a first axis, the prism array including peaks mud valleys, substantially all of the peaks being disposed in about a single plane.
A luminaire, comprising:
- a light source;
- a light guide that receives light radiating from the light source;
- and
- a prism array for redirecting light, the prism array including a first group including a plurality of prisms tilted in a first direction and a second group including a plurality of prisms tilted inn second direction, the first and second groups being disposed along the light guide in an alternating fashion, the prism array including peaks and valleys, substantially all of the peaks, being disposed in about a single plane.
Dependencies are inferred from the claim text.