Patent ID: 8177597
Filing Date: 2012-05-15
Classification: F21V,F21W,F21Y,Y10T

Abstract:
1. A method for constructing a lamp for radiating a warning signal within a desired polar angular range around a mean polar direction, the method comprising the steps of: a) fixing a base body at a mounting location; b) arranging an annular support element comprising an annular reflector concentrically around a lamp axis, wherein seen in the direction of the lamp axis, the annular support element comprises an upper part, a lower part and a center part, wherein the upper part and the lower part are held by the center part at a defined spacing from one another; c) manufacturing the upper part and the lower part as annular elements on a lathe; d) forming a region of at least one of the upper part and the lower part facing the respective other part to be reflective, wherein the region formed to be reflective forms the annular reflector; e) arranging an inner annular optical system concentrically around the lamp axis, wherein the inner annular optical system has a first finite thickness in a direction radial to the lamp axis and comprises two first inner areas, a second inner area separate from and adjacent to the two first inner areas and two third inner areas, each of the two third inner areas overlapping a respective one of the two first inner areas; f) arranging an outer annular optical system concentrically around the lamp axis, wherein the outer annular optical system has a second finite thickness in the direction radial to the lamp axis and comprises two first outer areas, a second outer area separate from the two first outer areas and two third outer areas separate from the two first outer areas and the second outer area, the annular support element, the inner annular optical system and the outer annular optical system forming an optical arrangement; g) arranging a plurality of lighting elements on the center part of the annular support element in an annular distribution around the lamp axis, wherein each of the plurality of lighting elements defines a respective polar plane including the lamp axis and intersecting a respective lighting element of the plurality of lighting elements and wherein the respective lighting element radiates light in the respective polar plane such that a portion of the light radiated in the respective polar plane is radiated within a central polar range containing a mean polar direction and a remainder of the light radiated in the respective polar plane is radiated outside the central polar range, the central polar range comprising a polar middle region containing the mean polar direction and two polar outside regions adjoining the polar middle region at either side; h) shaping the annular reflector in such a manner that the light radiated by the respective lighting element in the central polar range is not reflected by the annular reflector, but passes first through the inner annular optical system, and then through the outer annular optical system; i) shaping the annular reflector to reflect the light radiated by the respective lighting element outside the central polar range radially outwardly, such that the light radiated by the respective lighting element outside the central polar range and reflected by the annular reflector passes through the two first inner areas; j) shaping the two first inner areas to direct the light reflected by the reflector and passing through the two first inner areas to the two first outer areas; k) shaping the two first outer areas such that the light passing through the two first inner areas and directed to the two first outer areas emerges from the two first outer areas in a direction within a desired polar angular range around the mean polar direction; l) shaping the inner annular optical system in such a manner that the light radiated by the respective lighting element within the polar middle region passes through the second inner area; m) shaping the second inner area to direct the light passing through the second inner area to the second outer area; n) shaping the second outer area such that the light passing through the second inner area and directed to the second outer area emerges from the second outer area in a direction within the desired polar angular range around the mean polar direction; o) shaping the inner annular optical system in such a manner that the light radiated by the respective lighting element in the two polar outside regions passes through the two third inner areas; p) shaping the two third inner areas to direct the light passing through the two third inner areas to the two third outer areas; and q) shaping the two third outer areas such that the light passing through the two third inner areas and directed to the two third outer areas emerges from the two third outer areas in a direction within the desired polar angular range around the mean polar direction.