Patent ID: 6752519
Filing Date: 2004-06-22
Classification: B64F,F21W

Abstract:
A lighting device for installation in a substantially plane surface, comprising:at least one lamp device that emits light in a light direction which forms an exit angle with an exit face of a single light refracting means, in the lamp device said lamp device comprising a light source that emits light towards an incident face of the light refracting means, and a color filter, wherein the lamp device is in the form of a unit with said light source and said refracting means, wherein the light refracting means has a longitudinal direction coincident with said light direction, and where the exit face is substantially parallel to the substantially plane surface, and that the light refracting means is made of a prism grating, consisting of discs of a glass material and light preventing cover layers placed between the discs, the exit face is set at a slight angle of inclination, relative to the substantially plane surface, the exit angle and the angle of inclination in combination causing light from the light source to be brought to an emergent angle above the surface that satisfies pre-set requirements for light intensity close to the surface.