Luminaire and lamellae louver therefor

Illumination – Light source and modifier – Louvered or grid type modifier

Reexamination Certificate

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Details

C362S279000, C362S292000, C362S325000, C362S342000, C362S354000

Reexamination Certificate

active

10523155

ABSTRACT:
A luminaire has side reflectors having edges defining the width W of a light-emission window, and a plurality of lamellae, which have a concave outer edge in the light-emission window and an inner face remote from that window. In the centers of the lamellae, the lamellae have a distance hobetween the outer edge and the inner face that is <0.1 W. As a result, the total surface area of the inner face is relatively small. Internal reflections are thereby reduced, and a higher light output is obtained. If the lamellae are solid and made of plastic, less material is required for their fabrication. In a preferred embodiment, ho<0.05 W, and the inner face may then be convex and even have the same contour as the outer edge. The lamellae louver has lamellae of ho<W, in which W is also the length of the lamellae.

REFERENCES:
patent: 5758954 (1998-06-01), Holten et al.
patent: 5908234 (1999-06-01), Kreeft
patent: 6582099 (2003-06-01), Bartenbach
patent: 6616307 (2003-09-01), Haenen et al.
patent: 6626560 (2003-09-01), Caferro et al.
patent: 7040781 (2006-05-01), Kosters et al.
patent: 0757772 (1997-02-01), None
patent: WO9625623 (1996-08-01), None

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