U.S. Philips Corporation

Corinne Lac

Petrus A Holten

The luminaire for a tubular electric lamp (3) has, in a housing (1) with a light emission window (2) in plane P, reflectors (5) at either side of the lamp (3) and a number of slats (10) transverse to the reflectors (5) below the lamp (3). The slats (10) are V-shaped in cross-section and have an inner surface (11) facing the lamp (3). The inner surface (11) has a central zone (12) and flanks (13) which extend at an angle away from plane P. The inner surface (11) has end zones (14) near the reflectors (5) which are in a plane Q parallel to plane P. The longitudinal axis (4) of the lamp (3) is situated in a region extending from plane Q towards plane P. Although the slats are relatively small, bright spots within the shielding angle of the luminaire are avoided.

Luminaire slat with v-shaped cross section

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.

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Nevers, France

Corinne Lac