Illumination – Light source and modifier – Louvered or grid type modifier
Patent
1996-02-13
1998-06-02
Sember, Thomas M.
Illumination
Light source and modifier
Louvered or grid type modifier
362290, 362342, 362354, 362147, F21V 1106
Patent
active
057589542
ABSTRACT:
A luminaire has a housing with a light emission window (2), a tubular lamp supported in the housing facing the window (2) and having a center line extending in a plane P perpendicular to the window (2), side reflectors (5), and three-dimensional lamellae (10) which each have an outer edge (11) and a pair of inner edges (12). The outer edge of each lamellae is concave in a direction transverse to the window. The luminaire thus provides an optimized cut-off angle, screening light which would otherwise be dazzling but permitting non-dazzling light to pass. Each of the lamellae has a concave curvature in a direction parallel to the plane P but which flattens out going from plane P towards the side-reflectors (5). That enlarges the aperture through which light emanates and makes the illumination provided by the luminaire more uniform.
REFERENCES:
patent: 4494175 (1985-01-01), Gawad et al.
patent: 4539628 (1985-09-01), Bartenbach
patent: 4621309 (1986-11-01), Grawe et al.
patent: 4888668 (1989-12-01), Roll
patent: 5008791 (1991-04-01), Caferro
patent: 5448462 (1995-09-01), Moran, III
patent: 5528478 (1996-06-01), Degelmann
Holten Petrus A.J.
Lac Corinne
Egbert Walter M.
Sember Thomas M.
U.S. Philips Corporation
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