Collection optics for high brightness discharge light source
AssigneeGeneral Electric Company
InventorsJohn M. Davenport, Richard L. Hansler, Kenneth S. King, William J. Cassarly
Life of this patent
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Abstract
Improved collection optics for a lighting system comprised of a light source, reflector and light receptive component include a multi-portion reflector or a non-imaging optical collector having a positive curvature located at an input end to the light receptive component. The collection optics capture additional lumens for transmission through the light guide. The optical arrangement can also collect different colors of light from the source that would otherwise be omitted from transmission through the light receptive component.
Claims14
A lighting system comprising:
- an elliptical reflective surface having first and second foci;
- a light source disposed at the first focus of the reflective surface so that the reflective surface receives light therefrom and directs the light toward the second focus;
- a light receptive component having an input end located at the second focus to receive light from the elliptical reflective surface and transmit the light to a remote location;
- a non-imaging optical collector having a positive curvature located adjacent the input end of the light receptive component for collecting additional light from the source and directing the light into the input end of the light receptive component;
- and,
- wherein said optical collector is a cone section and further includes a compound parabolic concentrator disposed adjacent said cone section.
A lighting system comprising:
- a light source;
- a light guide having an input end for receiving light from the light source and transmitting the light to a remote location;
- a reflector interposed between the light source and the light guide for receiving light from the light source and directing the light into the light guide, the reflector having first and second portions with each portion having first and second foci, one of the portions having its first focus located at a region spaced from a core of the light source;
- and
- wherein the reflector first portion has its first focus located at the core of the light source and its second focus located at the input end of the light guide and the reflector second portion has its first focus located at the region spaced from the core and its second focus at the input end of the light guide.
Dependencies are inferred from the claim text.