Lighting system
AssigneeSylvan R. Shemitz Associates, Inc.
InventorSylvan R. Shemitz
Life of this patent
Estimating the term…
Abstract
A desk level work area and its immediate environment are lighted with reduced or eliminated glare and veiling reflections from the task, by a lighting fixture mounted between seated eye height and standing eye height. The lighting fixture comprises an elongated housing, a light source within the housing providing illumination longitudinally of the housing, and a refractor plate capable of distributing luminous flux from the light source in a bat wing configuration. The plate is mounted on the housing such that the bat wing configuration of the luminous flux is directed essentially to the right and left of a viewer transversely facing the light source.
Claims9
In combination:
- a substantially horizontally disposed work surface spaced from ground level and adapted to be viewed primarily from a first direction, and a lighting fixture arranged above said work surface and means supporting said fixture at a height not substantially lower than the eye level of a person facing said work surface in a position to work thereon, and not at a height substantially above eye height of a person standing adjacent thereto, said lighting fixture including a linear light source having a horizontal axis extending in a second direction perpendicular to that from which said surface is to be viewed and also including an elongated refractor, said refractor having light incident and emergent surfaces and at least one of said surfaces having linear prisms repeating continuously beneath said light source, said prisms oriented substantially perpendicular to said axis and lying in vertical planes substantially parallel to said first direction for receiving incident light from the linear light source and for redirecting light rays emitted by said light source to and through the emergent surface substantially to the right and left of the first direction such that direct glare of the light from the light source and veiling reflections from the work surface directed toward a person facing the light source from said first direction are minimized and substantially eliminated.
An elongated lighting fixture for illuminating upwardly facing horizontal surfaces spaced from ground level and adapted to be viewed by a person facing said work surface in a position to work thereon with a minimum of direct discomfort glare in directions substantially perpendicular to the longitudinal axis of the fixture, comprising a linear light source having a horizontal axis, an elongated refractor extending beneath and parallel to the axis of said light source, said refractor having light incident and emergent surfaces, and at least one of said surfaces having linear prisms repeating continuously beneath said light source, said prisms oriented substantially perpendicular to said axis for receiving incident light from the linear light source and for redirecting light rays emitted by said light source to and through the emergent surface substantially to the right and left of the directions substantially perpendicular to the longitudinal axis of the fixture such that direct glare of the light from the light source and veiling reflections from the work surface are minimized and substantially eliminated in directions substantially perpendicular to the longitudinal axis of the fixture and means supporting said fixture at a height not substantially lower than the eye level of a person facing said work surface in a position to work thereon and not at a height substantially above eye height of a person standing adjacent thereto.
Dependencies are inferred from the claim text.