Optical configurations for distributing radially collimated...

Details Optical configurations for distributing radially collimated... Optical configurations for distributing radially collimated...

2005-02-08

2005-02-08

O'Shea, Sandra (Department: 2875)

Illumination

Light source and modifier

Plural serial lens elements or components

C362S335000, C362S299000, C362S328000, C362S331000

Reexamination Certificate

active

06851833

ABSTRACT:
A lighting assembly or a luminaire has a quasi point light source near a surface onto which light rays are to impinge. There is a lens system which includes a radially collimating first Fresnel lens at least partially surrounding the light source and collimating at least some of the light from the source to impinge upon the surface, and a second optical element, which may also be a Fresnel lens, for receiving light rays and directing the rays to impinge upon the surface at a position closer to the lens system than the rays from the first Fresnel lens. This provides more uniform lighting on the surface since the first Fresnel lens lighting impinges upon the surface at a distance from the assembly, and the second Fresnel lens provides fill in lighting between the assembly and the lighting of the first Fresnel lens.

REFERENCES:
patent: 4962450 (1990-10-01), Reshetin
patent: 5160192 (1992-11-01), Sugawara
patent: 5897201 (1999-04-01), Simon

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