Luminare
AssigneeGeneral Electric Company
InventorJames L. Grindle
Life of this patent
Estimating the term…
Abstract
Dome-shaped reflector in indoor luminaire having a high intensity lamp and mounted at relatively low height has the lower portion of its reflecting surface formed to reflect light downwardly at an angle of not more than about 50% of the cut-off angle formed by the rim of the reflector relative to the lamp, so as to provide low glare at viewing angles of about 65.degree.-85.degree. from nadir. The cut-off angle is not more than 65.degree..
Claims10
A luminaire comprising, in combination, a concave reflector having a top and a bottom and formed by a wall extending about an axis and having a rim defining a bottom opening, and a lamp mounted in said reflector and having a light center substantially on said axis, said lamp arranged so that a straight line between and tangent to said rim and the bottom of said lamp form a vertical cut-off angle of not more than about 65.degree.relative to said axis, said reflector having an inner reflecting surface portion extending a substantial distance upwardly from said rim and formed to reflect substantially all the light incident thereon from said light center downwardly at a vertical angle relative to said axis of not more than about 50% of said cut-off angle.
Dependencies are inferred from the claim text.