Lighting fixture including two reflectors

Details Lighting fixture including two reflectors Lighting fixture including two reflectors

2007-01-02

2007-01-02

Tso, Laura K. (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S217060, C362S346000, C362S297000, C362S260000

Reexamination Certificate

active

10508248

ABSTRACT:
A luminaire optical system (10) for an indirect light source including a tubular lamp (12) having a longitudinal axis (22), a first reflector assembly (14) extending parallel to and radially spaced directly above said lamp and a second reflector assembly (16) parallel to and radially spaced from said lamp directly below the lamp. Each of the assemblies includes symmetrical reflectors (22; 24; 30; 32) joining in an apex (26; 34) directly below and above the lamp. The bottom reflector (16) further may include two segments (30a;30b;32a;32b) on each reflecting surface, the segments marking a sharp change in reflecting angle. Most such luminaires will typically also include perforations to maintain useful light profiles. The luminaire according to the present configuration increases the lighting efficiency by minimising any reflections passing back into the tube and ensuring an even spread of light throughout an area being illuminated.

REFERENCES:
patent: 4310876 (1982-01-01), Small et al.
patent: 5249110 (1993-09-01), Russello et al.
patent: 2003/0002280 (2003-01-01), Paravantsos
DE 4,125,545 to Schmidt, Hans J., issued Feb. 20, 1992.

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