Faceted reflector

Claim 2

A reflector for an illuminating device which has a light source for reflecting light, emanating from the light source, upon a work surface to illuminate the work surface according to a pattern, said reflector comprising: a plurality of elementary reflecting surfaces each having an upper edge, a lower edge and two opposite side edges, said reflecting surfaces being disposed adjacent one another in at least one group having substantially continuous transitions between edges of vertically adjacent reflecting surfaces and having discontinuous, stepped transitions between edges of laterally adjacent reflecting surfaces; each of said elementary reflecting surfaces comprising a skew concave mirror, each of the four said edges thereof being an arc of a circle, each of the four arcs being of different curvature; the skew concave mirrors in said one group being individually oriented to collectively reflect light from said light source to an area of the work surface which is offset from being aligned with he light source; the plurality of elementary reflecting surfaces further including at least one additional group thereof having substantially continuous transitions between edges of vertically and laterally adjacent reflecting surfaces; and the concave mirrors in said one additional group being individually oriented to collectively reflect light from said light source onto said at least one group comprising said skew, concave mirrors.

Claim 3

The reflector of claim 1 comprising: a generally inverted bowl-shaped structure having a generally cylindrical sidewall divided into a rear portion, two laterally opposite side portions and a front portion and having a top wall surmounting said sidewall; means defining an upper circular opening through said top wall and means defining a lower circular opening of said structure at and bounded by the lower periphery of said sidewall, said upper circular opening having a center which is substantially offset from the center of said lower circular opening toward said rear portion of said sidewall; said structure being symmetrical about an axially extending diametral plane extending through said centers and bisecting said front portion and said rear portion; said at least one group of elementary reflecting surfaces comprising said skew, concave mirrors being disposed upon one of said sidewall side portions; said at least one group of elementary reflecting surfaces further comprising a second group of elementary reflecting surfaces comprising skew, concave mirrors each having an upper edge, a lower edge and two opposite side edges, said reflecting surfaces being disposed adjacent one another in at least one group having substantially continuous transitions between edges of vertically adjacent reflecting surfaces and having discontinuous, stepped transitions between edges of laterally adjacent reflecting surfaces; each of the four edges of each skew, concave mirror of said second group being an arc of a circle, each arc of the four arcs being of different curvature; said second group of elementary reflecting surfaces comprising skew, concave mirrors being disposed on the other of said sidewall side portions; the front portion of said sidewall having substantially circular-arc cross-sections in planes perpendicular to the longitudinal axis of said upper circular opening; the rear portion of said sidewall having means defining a plurality of stepped reflecting surface portions thereon; the rear portion being disposed to reflect light incident thereon from said light source to an area of said work surface below said reflector offset in the direction of the front portion of said structure sidewall; and the front portion being arranged for reflecting most of the light incident thereupon toward the rear portion of said sidewall.

Claim 4

The reflector of claim 2 wherein said top surface, adjacent said upper circular opening and adjacent said front portion of said sidewall is generally conically curved in a sector arranged to avoid incidence of light thereon from said light source.