EP3293440A1 - Light set and radiator for same - Google Patents

Abstract

The present invention relates generally to radiators having at least one light source and a reflector for shaping a radiation beam. In particular, the invention relates to a set of lights comprising a plurality of radiators, each comprising at least one light source and a reflector having at least three shell segments and the shell segments together enclosing reflector collar and captures light emitted from the light source and emits in the form of a beam, the Reflector collars all emitters have corresponding circumferential contours and / or mating dimensions, so that the emitters are interchangeable mounted in the same installation environment. According to the invention, the luminaire set comprises a first radiator, the reflector of which is designed to emit a cross-sectionally round radiation bundle and has shell surfaces as free-form surfaces, each of which is designed to irradiate at least an area fraction of at least 2 / n in the cross-section of the radiation beam n is the number of shell segments of the reflector, as well as at least one second radiator whose reflector is adapted to emit a cross-section polygonal beam, and has shell surfaces free-form surfaces, each of which is formed in the cross section of the beam at least an area of at least 2 / n to be irradiated, where n is also the number of shell segments of the reflector.

Description

The present invention relates generally to radiators having at least one light source and a reflector for shaping a radiation beam. In particular, the invention relates to a set of lights comprising a plurality of radiators, each comprising at least one light source and a reflector having at least three shell segments and the shell segments together enclosing reflector collar and captures light emitted from the light source and emits in the form of a beam, the Reflector collars all emitters have corresponding circumferential contours and / or mating dimensions, so that the emitters are interchangeable mounted in the same installation environment.

In various lighting applications, a plurality of radiators are installed in regular arrangements, so that the radiators have the same appearance as possible and should have the same connection dimensions in order to achieve a harmonious overall appearance and exchange the radiators against each other or not for each radiator its own To require installation. Examples of this are installed in ceiling or wall panels emitter assemblies whose radiator fitted into panel recesses Need to become. In order to be able to provide the same recesses, as far as possible all radiators should have the same connection dimensions and contours, for example, all square be formed with certain dimensions. Since the peripheral contours are essentially influenced by the reflectors of the radiators, the reflectors should have corresponding circumferential contours and connection dimensions.

If all radiators with corresponding circumferential contours and connection dimensions used, but so far there is a problem that the achievable lighting scenarios are relatively limited. If, for example, rectangular recesses are provided for the reflectors or emitters, correspondingly shaped reflectors often produce rectangularly illuminated area pieces, while round recesses for round reflectors usually illuminate round areal pieces. In this respect, it is difficult to achieve a uniform appearance when different emitters are to achieve different light intensity distributions and light beam contours.

The above requirements are not only in space or building lighting tasks within the meaning of the aforementioned ceiling or wall panels with radiator panels, but also in other applications of spotlights, in which one and the same version or the same housing or generally the same installation environment for different emitters can be used is to be able to use depending on the lighting task a suitable spotlight with a suitably shaped beam and light intensity distribution. For example, in shop lighting showcases with predetermined recesses for spotlights, but depending on the occupancy or display goods in the showcase different lighting scenarios are to be realized. For example, if a food plate is issued, it may be advantageous to illuminate it with a circular beam cone, while a rectangular silver plate may be better irradiated with a rectangular beam cone. Even with kitchen and corridor lighting, it may be advantageous in the same recessed recesses or luminaire or spotlight housing different emitters to mount. For example, it may be desirable to accentuate a long passage through narrow, round warm light cones in the normal evening mode, while for an emergency, for example, a fire mode operation as complete as possible, wide-beam white light illumination may be desired. Nevertheless, in order to achieve a uniform appearance, different emitters with different emission characteristics should have the same appearance and be mounted in the same installation environments in the sense of housing or the like.

The present invention has for its object to provide an improved set of lights of the type mentioned and improved radiators for this, avoid the disadvantages of the prior art and further develop the latter in an advantageous manner. In particular, to be achieved with interchangeable emitters a greater variability of the radiation characteristics and lighting scenarios, without sacrificing this with drawbacks in the homogeneity of the beam light and the luminaire efficiency and the need for many different mounting positions.

According to the invention, said object is achieved by a luminaire set according to claim 1 and a radiator according to claim 10. Preferred embodiments of the invention are the subject of the dependent claims.

It is therefore proposed a set of lights with multiple emitters that realize different emission characteristics despite the same circumferential contours and / or the same connection dimensions of the reflector collars all radiators. The relationship between the cross section of the beam emitted by the reflector and the outer contour of the reflector is canceled, so to speak. According to the invention, the luminaire set comprises a first radiator, the reflector of which is designed to emit a cross-sectionally round radiation bundle and has shell surfaces as free-form surfaces, each of which is designed to irradiate at least an area fraction of at least 2 / n in the cross-section of the radiation beam n is the number of Shell segments of the reflector is, as well as at least a second radiator whose reflector is adapted to emit a polygonal cross-section beam, and has shell surfaces free-form surfaces, each of which is adapted to at least a surface portion of at least 2 / n in the cross section of the beam irradiate, where n is also the number of shell segments of the reflector. Despite segmentation of the photometrically effective reflector surface into a plurality of shell segments, therefore, in particular a round beam is generated, while the said segmentation is used equally for the generation of angular beams. In this case, the segmentation is used to illuminate the beam multiply or overlapping by each shell segment illuminated an area ratio of the total illuminated by the beam surface piece, which is at least twice as large as the area ratio of the respective shell segment on the entire photometrically active surface of the reflector or the sum of all shell segments. Thus, for example, if three shell segments are provided so that one shell segment has one-third area fraction on the active reflector surface, this shell segment illuminates at least two-thirds of the total area irradiated by the reflector. As a result, a uniform, homogeneous illumination can be achieved.

The said first radiator, which generates a round beam, can in principle be designed differently, wherein said round beam can be circular or elliptical in cross-section or oval or in a similar manner round.

In a further development of the invention, it is also possible to provide different radiators with differently shaped, generally round, radiation bundles. For example, if the first radiator or its reflector designed to generate a circular beam, a third radiator may be provided, the reflector is designed to produce an elliptical or oval beam. The shell segments are each as free-form surfaces formed in the aforementioned manner each illuminate an area ratio of at least 2 / n of the circular, illuminated area piece or 2 / n of the elliptical or oval illuminated area piece.

The aforesaid second radiator, which generates a polygonal ray bundle, can also be embodied differently, its reflector being able to be configured, in particular, to produce a beam bundle which is polygonal in cross section, in particular a rectangular or hexagonal ray bundle. In principle, it would also be possible to provide a triangular, pentagonal or otherwise polygonal polygon as a beam.

Regardless of the contouring of the free-form surfaces of the shell segments and the cross-sections of the beams illuminated therefrom, the reflector collar enclosing the shell segments can be contoured differently. In particular, the reflector collar of the reflector, which generates a round beam cone or a round beam, can have an angular, in particular polygonal contour, for example in the form of a square or a rectangle or a hexagon. Conversely, the reflector collar of a reflector, which emits a rectangular beam in the aforementioned manner, may have a round contour, for example a circular or elliptical or oval peripheral contour. In order to achieve the interchangeability of the radiator or reflectors against each other and thus the ability to mount in the same installation environment, however, the same circumferential contour of the reflector collar is selected for the reflectors of the radiator of a matching set of lights.

If a reflector collar contoured on the outer peripheral side is provided, the number of its corners can correspond to the number of shell segments of the reflector, for example a hexagonal reflector collar on a six-shell reflector. As a result, an overall compact, small-sized reflector arrangement can be created. In principle, however, a reflector collar can be provided, the number of corners of the shell number deviates, so for example, a hexagonal collar on a four-shell reflector, but also as stated a circular or oval or elliptical collar can be provided on such multi-layered reflectors.

Similarly, the number of shell segments can be selected independently of the contouring of the beam. For example, four-shell reflectors can be used to create a round beam and likewise to produce a square beam and to create a hexagonal beam. Similarly, six-shell reflectors can be used to obtain a square beam or other beams, in each case provided in the aforementioned manner that each shell segment illuminated in the illuminated patch at least twice as large area as the area fraction of the shell segment on the summed total area of all shell segments equivalent. Other segmentations such as three-, five- or eight-shell reflectors are also possible to produce differently shaped beams.

In an advantageous embodiment of the invention, the shell segments and their free-form surfaces can be contoured such that each shell segment is irradiated substantially the entire irradiated area, which is illuminated by the beam of the radiator in total.

In addition to the reflected indirect light component emitted by said shell segments, the reflector may leave an unreflected direct light component that the light source emits directly past the shell segments. In an advantageous embodiment of the invention, the trailing edges of the shell segments are contoured such that the unreflected past the shell segments by direct light component substantially completely illuminates the also illuminated by the reflected Indirektlichtanteil surface piece and is limited thereto. In other words, the direct light component and the Indirect light share have the same breakaway angle, so that both the indirect light component and the direct light component each illuminate 100% of the area that is illuminated by the total emitter.

The said tear-off edge of the shell segments, which determine the break-off angle of the direct light component, can be formed in particular by a transitional contour between the shell segments and the reflector collar enclosing the shell segments. The said reflector collar itself may be designed to be inactive in terms of lighting technology, the reflector collar being able to expand outwards from the transition contour to the shell segments at an angle which is greater than the breakaway angle, so that no light, ie neither the reflected indirect light of FIG the shell segments still the unreflected direct light falls on the reflector collar.

Depending on the design of the free-form surfaces of the shell segments and the beam produced thereby, the reflector collar and the transition contour, which may be formed by the intersection of the reflector collar surface with the respective shell segment surface, may be formed differently. If, for example, the free-form surfaces of the shell segments are configured to produce a circular, in particular circular, beam, the transition contour between the reflector collar and the shell segments and thus the tear contour of each shell segment can essentially have an arcuate concave profile, so that the edges of the shell segment respective shell segment have a greater height than a central portion of the shell segment.

In such a configuration of the reflector producing a round beam, the transitional areas between two adjacent shell segments may form concave indentations which may have an oblong course, for example in the manner of a corner between two walls of a room. The transition regions can thus form elongated beads, which in particular have a concave curvature and / or in one of the Main beam direction containing cutting plane between the two shell segments can extend therethrough.

The shell segments themselves are according to their design as free-form surfaces advantageously biaxially concave curved so that they are concave curved both in a sectional plane perpendicular to Hauptabstrahlrichtung as well as in a sectional plane containing said main radiation direction, are concavely curved.

Advantageously, said shell segments may each be formed in a channel or strip shape and be arranged in a star shape with respect to said main emission direction.

Fig. 1:

eine schematische, perspektivische Darstellung eines Strahlers und dessen Reflektors, der ein im Querschnitt im Wesentlichen kreisrundes Strahlenbündel erzeugt, wobei der Reflektor von außen gezeigt ist und die Übergänge zwischen dem Reflektorkragen und den Schalensegmenten dargestellt sind,

Fig. 2:

eine schematische, perspektivische Darstellung des Reflektors aus Fig. 1 ohne das davon abgestrahlte Strahlenbündel,

Fig. 3:

eine schematische Darstellung des Reflektors aus den vorhergehenden Figuren gemäß einer Variante hiervon, gemäß der die Schalensegmente des Reflektors mit einer Facettierung, insbesondere Mikrofacettierung versehen sind,

Fig. 4:

eine schematische, perspektivische Darstellung eines Strahlers und dessen Reflektors ähnlich Fig. 1, wobei der Reflektor ein im Querschnitt rechteckiges, insbesondere quadratisches Strahlenbündel abstrahlt,

Fig. 5:

eine perspektivische, schematische Darstellung des Reflektors aus Fig. 4 in einer Außenansicht ohne das davon abgestrahlte Strahlenbündel,

Fig. 6:

eine schematische, perspektivische Darstellung des Reflektors des Strahlers aus Fig. 4 gemäß einer Variante hiervon, gemäß der die Schalensegmente des Reflektors mit einer Facettierung, insbesondere Mikrofacettierung versehen sind,

Fig. 7:

eine perspektivische, schematische Darstellung eines Strahlers und dessen Reflektors ähnlich den Figuren 1 und 4, wobei der Reflektor ein im Querschnitt elliptisches Strahlenbündel abgibt,

Fig. 8:

eine schematische, perspektivische Außenansicht des Reflektors aus Fig. 7 ohne die Darstellung des davon abgegebenen Strahlenbündels, wobei die Übergänge zwischen dem Reflektorkragen und den Schalensegmenten gezeigt sind,

Fig. 9:

eine schematische, perspektivische Außendarstellung des Reflektors ähnlich Fig. 8 gemäß einer Variante hiervon, gemäß der der Reflektor an seinen Schalensegmenten mit einer Facettierung, insbesondere Mikrofacettierung versehen ist,

Fig. 10:

eine schematische, perspektivische Darstellung eines Strahlers und dessen Reflektors ähnlich den Figuren 1, 4 und 7, wobei der Reflektor sechsschalig aufgebaut ist und eine sechseckige Außenkontur besitzt und dazu ausgebildet ist, ein im Querschnitt kreisrundes Strahlenbündel zu erzeugen,

Fig. 11:

eine schematische, perspektivische Außendarstellung des Reflektors aus Fig. 10 ohne die Darstellung des abgegebenen Strahlenbündels, wobei die Übergangskonturen zwischen dem Reflektorkragen und den Schalensegmenten des Reflektors dargestellt sind,

Fig. 12:

eine schematische, perspektivische Außendarstellung des Reflektors ähnlich Fig. 11 gemäß einer Variante hiervon, gemäß der die Schalensegmente des Reflektors mit einer Facettierung versehen sind, und

Fig. 13:

eine schematische Nebeneinanderstellung der verschiedenen Reflektoren der Strahler gemäß den Figuren 1, 4, 7 und 10 und der hiervon erzeugten Strahlenbündel.

The invention will be explained in more detail with reference to preferred embodiments and associated drawings. In the drawings show:

Fig. 1:

a schematic perspective view of a radiator and its reflector, which generates a substantially circular in cross-section beam, the reflector is shown from the outside and the transitions between the reflector collar and the shell segments are shown,

Fig. 2:

a schematic, perspective view of the reflector Fig. 1 without the beam emitted by it,

3:

FIG. 2 a schematic representation of the reflector from the preceding figures according to a variant thereof according to which the shell segments of the reflector are provided with a faceting, in particular a microfacetting,

4:

a schematic, perspective view of a radiator and its reflector similar Fig. 1 wherein the reflector radiates a rectangular cross-section, in particular a square beam,

Fig. 5:

a perspective, schematic representation of the reflector Fig. 4 in an external view without the beam emitted by it,

Fig. 6:

a schematic perspective view of the reflector of the radiator Fig. 4 according to a variant thereof, according to which the shell segments of the reflector are provided with a faceting, in particular microfaceting,

Fig. 7:

a perspective, schematic representation of a radiator and its reflector similar to the FIGS. 1 and 4 in which the reflector emits a beam which is elliptical in cross-section,

Fig. 8:

a schematic, perspective exterior view of the reflector Fig. 7 without the representation of the beam emitted therefrom, the transitions between the reflector collar and the shell segments being shown,

Fig. 9:

a schematic, perspective external representation of the reflector similar Fig. 8 according to a variant thereof, according to which the reflector is provided on its shell segments with a faceting, in particular microfaceting,

Fig. 10:

a schematic, perspective view of a radiator and its reflector similar to the FIGS. 1 . 4 and 7 wherein the reflector is six-shelled and has a hexagonal outer contour and is adapted to produce a circular cross section in the beam,

Fig. 11:

a schematic, perspective external representation of the reflector Fig. 10 without the representation of the emitted beam, wherein the transition contours between the reflector collar and the shell segments of the reflector are shown,

Fig. 12:

a schematic, perspective external representation of the reflector similar Fig. 11 according to a variant thereof, according to which the shell segments of the reflector are provided with a faceting, and

Fig. 13:

a schematic juxtaposition of the various reflectors of the radiator according to the FIGS. 1 . 4 . 7 and 10 and the beam produced thereby.

As the Figures 1-3 1, a first radiator 1 may comprise a reflector 11, which captures the light emitted by at least one light source 20, for example in the form of an LED, and transforms it into a radiation beam 31 or emits such a radiation beam 31. Said light source 20 may be arranged in particular in the central region of a bottom portion of the reflector 11 and radiate hemispherically into the reflector body.

As the Figures 2 and 3 clarify, the reflector 11 has a multi-beam structure. Although the reflector 11 generates a radiation beam 31 which is circular in cross-section, cf. Fig. 1 , the photometrically active reflector portion of the reflector 11 is not a single-shell trough with a circular cross-section, but a generally cup-shaped body, which is composed of four shell segments S1, S2, S3 and S4. The four-shell structure according to the figures is only an example. The reflector 11 could also have three or five or six or eight shells or a different number of shell segments.

As Fig. 1 and 2 show, the shell segments S1, S2, S3 and S4 are each contoured channel-shaped and with respect to the main emission axis of the reflector 11, can form the central or symmetry axis, arranged in a star shape. The aforementioned shell segments S1-S4 are each formed as free-form surfaces, which may be concavely curved in a biaxial manner, so that each shell segment has a concavely curved course both in cross-sectional planes perpendicular to the main emission direction and a concavely curved section in longitudinal section planes which contain said main emission direction. has arcuate contour.

In the transition regions between each two adjacent shell segments S1 and S2 or S2 and S3 or S3 and S4, the reflector 11 has a concave indentation or corner or fold, which may be slightly rounded if necessary, said recess E in a sectional plane , which contains the main emission direction and passes between two shell segments, may extend. The said indentation E can independently of this have a uniaxially curved, concave, arcuate course, cf. Figures 1-3 ,

Said shell segments S1, S2, S3 and S4 are bordered by a common reflector collar K, which adjoins upper edge regions of the shell segments and, in spite of the cross-sectionally round radiation beam 31, may have an angular outline, for example the one in FIG Fig. 1 shown rectangular, in particular square outline. It should be noted, however, that said contour contour U could also be shaped differently, for example round or hexagonal or elliptical or oval.

The said reflector collar K is designed to be inactive in terms of lighting technology, in that it is bent or arched so strongly outwards from the transition contour to the shell segments that neither reflected indirect light nor unreflected direct light fall onto the surfaces of the reflector collar K.

Said transition contour between the reflector collar K and the shell segments S1, S2, S3 and S4 advantageously forms the tear-off edge A, at the light emitted directly from the light source 20 directly unreflected light from the reflector 11 can escape. Thus, the aforementioned tear-off edge A determines the break-off angle of the direct light. Advantageously, said trailing edge A - ie the transition contour between the reflector collar K and the shell segments S1-S4 - contoured such that the ablation angle for the direct light corresponds to the break angle of the reflected indirect light, which is determined by the contouring of the free-form surfaces of the shell segments. Thus, the direct light irradiates 100% of the beam emitted by the reflector as a whole. Likewise, the shell segments S1-S4 together may also substantially completely irradiate or fill said beam so that both the direct and indirect lights respectively illuminate 100% of the total beam emitted by the radiator.

The free-form surfaces of the shell segments S1-S4 can in each case advantageously be contoured in such a way that each shell segment S1-S4 respectively irradiates the entire radiation beam 31 or, in other words, irradiates 100% of the surface that is irradiated by the radiation element as a whole. In principle, however, it would also be possible for each shell segment, viewed individually, to irradiate only about 50%, or even 60% or 75%, of the area mentioned, which is irradiated in total by the radiator 1. In this case, each of the shell segments irradiated partial surfaces can complement each other, so that together of the shell segments together again the entire surface is irradiated.

Irradiated in the manner mentioned each shell segment S1-S4 the beam substantially completely, a particularly high quality, homogeneous illumination can be achieved.

In order to further homogenize the emitted light and to compensate, for example, for inhomogeneities of the light source or positioning errors of the light source 20 or to support the color mixing of two light colors, the aforementioned shell segments S1-S4 can advantageously be faceted be provided, in particular with a Mikrofacettierung with more than 25 or more than 50 or even more than 100 facets on each shell segment. As Fig. 3 shows, the facets may be made very small in area, for example, less than 10% of the area of a shell segment, in particular less than 5% of the area of a shell segment amount. Independently of this, the named facets F on each shell segment can be arranged one above the other and next to one another in a plurality of rows and columns, so that each shell segment is coated in a mosaic-like manner with many facets. The mentioned facets F can in this case form flattened area pieces. Alternatively or additionally, individual facets or all facets may also be concavely curved in the manner of indentations similar to a golf ball and / or convexly arched in the manner of dimples.

As the Figures 4-6 show, a second radiator 2 may have a reflector 12, the reflector collar K also has a rectangular, in particular square circumferential contour U. Corresponding to the previously described emitter 1, the reflector 11 of this second emitter 2 also has a segmentation, it also being possible for four tray segments S1-S4 to be provided here, which in turn may be formed as freeform surfaces biaxially concavely curved. However, in the case of this second radiator 2 or its reflector 12, the free-form surfaces mentioned are contoured in such a way that a rectangular, in particular square, beam 32 viewed in cross-section is emitted, cf. Fig. 4 ,

In this case, the reflector collar K is contoured regardless of its analogous rectangular shaped peripheral contour and / or the tear-off edge A formed by the transition contour from the reflector collar K to the shell segments S1-S4 such that the direct light component passing from the light source 20 past the shell segments S1-S4 is also contoured , is emitted unreflectively, in Fig. 4 illuminated in cross-section rectangular beam illuminated, in particular completely illuminated.

As Fig. 6 1, a faceting with a multiplicity of facets F analogous to the previously described embodiment of the first radiator 1 can also be provided in the case of this reflector 12.

As the Figures 7-9 show a third radiator 3 may have a reflector 13, the reflector collar K in turn has a rectangular, in particular square peripheral contour U, which may correspond to the circumferential contours of the first and second radiator. This reflector 13 of the third radiator 3 can also be segmented into four shell segments S1-S4, which in turn are each contoured as a free-form surface, which can be biaxially curved, as described above. However, the free-form surfaces are in this case contoured in such a way that, as in the case of the first radiator 1, a bundle of rays which is circular in cross-section, rather than a bundle of rays elliptical in cross-section 33, is produced. Fig. 7 ,

The tear-off edge A of the shell segments S1-S4 of the reflector 13, which is formed by the transition contour to the reflector collar K, is embodied here such that here, too, the direct light component illuminates 100% of the total illuminated area. Thus, the direct light also forms, by means of the tear-off edges A, an elliptical elliptical beam which is congruent with the beam produced by the shell segments.

As Fig. 9 shows, also in this reflector 13, a faceting with a plurality of facets can be provided analogously to the previously described embodiment.

As the Figures 10-12 show, a radiator 1, which generates a circular cross-sectionally round, in particular circular beam 31, also have a six-leaf segmentation and / or have a reflector collar K, which has a hexagonal peripheral contour U. Apart from this, the formation of the reflector, moreover, can correspond to the previously described embodiments, in particular the design of the reflector of the first radiator 1, which generates a bundle of rays that is round in cross-section. As Fig. 12 shows, can also at a such hexagonal or six-shell reflector 11 be provided with a plurality of facets F faceting.

Claims (15)

Luminaire set comprising a plurality of radiators (1, 2, 3), each comprising: at least one light source (20), - A reflector (11, 12, 13), the at least three shell segments (S1, S2, S3 ... Sn) and the shell segments (S1, S2, S3) together enclosing reflector collar (K) and emitted by the light source light captures and releases in the form of a beam (30), wherein the reflector collars (K) of all radiators (1, 2, 3) have mutually corresponding circumferential contours (U) and / or connection dimensions, so that the radiators (1, 2, 3) can be mounted interchangeably in the same installation environment,
characterized in that
the reflector (11, 13) of a first radiator (1, 3) is designed to emit a beam bundle (31, 33) which is round in cross-section, and has free-form surfaces as shell segments (S1, S2, S3 ... Sn), of which each is adapted to irradiate in the cross section of the beam (31, 33) at least an area fraction of at least 2 / n, when n is the number of shell segments of the reflector, and
the reflector (12) of a second radiator (2) is designed to emit a cross-sectionally polygonal radiation beam (32), and as shell segments (S1, S2, S3 ... Sn) has free-form surfaces, each of which is formed in Cross section of the beam (32) to irradiate at least an area ratio of at least 2 / n, if n is the number of shell segments of the reflector. Luminaire set according to the preceding claim, wherein the reflector (11) of the first radiator (1) is adapted to emit a circular cross section in the beam (31). Luminaire set according to the preceding claim, wherein the reflector (13) of a third radiator (3) is adapted to emit a cross-sectionally elliptical or oval beam (33), and as shell segments (S1, S2, S3 ... Sn) has free-form surfaces each of which is adapted to irradiate in the cross-section of the beam (33) at least an area fraction of at least 2 / n when n is the number of shell segments of the reflector. Luminaire set according to one of the preceding claims, wherein each of the free-form surfaces of the shell segments (S1, S2, S3 ... Sn) of all radiators (1, 2, 3) are adapted to substantially completely irradiate the cross section of the beam of the respective radiator. Luminaire set according to one of the preceding claims, wherein the peripheral contour (U) of the reflector collars (K) of all radiators (1, 2, 3) as a polygon, in particular square or hexagon, is formed. Luminaire set according to one of claims 1-4, wherein the peripheral contour (U) of the reflector collars (K) of all radiators (1, 2, 3) round, in particular circular or elliptical or oval, is formed. Luminaire set according to one of the preceding claims, wherein the reflector collars (K) of the reflectors (11, 12, 13) of all radiators (1, 2, 3) are formed in a photometrically inactive manner, wherein at each radiator (1, 2, 3) the transition contour between the reflector collar (K) and the shell segments (S1, S2, S3 ... Sn) of the respective reflector (11, 12, 13), the the tear-off edge (A) for the on the shell segments (S1, S2, S3 ... Sn) past unreflected emitted direct light component, is contoured such that the at the formed as free-form surfaces shell segments (S1, S2, S3), unreflectively emitted direct light component the cross section of the respective radiator (1, 2, 3) completely radiated beam (31 , 32, 33) are substantially completely irradiated. Luminaire set according to one of the preceding claims, wherein the shell segments (S1, S2, S3 ... Sn) of the reflector at least one, preferably all radiators (1, 2, 3) with a faceting, in particular a Mikrofacettierung with more than 25 or more than 50 facets per shell segment, provided. Luminaire set according to one of the preceding claims, wherein the reflectors (11, 12, 13) of all radiators (1, 2, 3) of the luminaire set have the same number of shell segments (S1, S2 ... Sn). A radiator (1, 2, 3) for a luminaire set, which is formed according to one of the preceding claims, comprising at least one light source (20), a reflector (11, 12, 13), the at least three shell segments (S1, S2, S3. Sn) and captures light emitted by the light source (20) and delivers it in the form of a radiation beam (31, 32, 33), characterized in that the reflector (11, 12, 13) is designed as shell segments (S1, S2, S3 , Sn) free-form surfaces, each of which is adapted to irradiate in the cross section of the beam (S1, S2, S3) at least an area ratio of at least 2 / n, if n is the number of shell segments of the reflector, and the tear-off edge (A ) of the shell segments (S1, S2, S3 ... Sn) is contoured in such a way that a direct light component radiated unreflected past the shell segments (S1, S2, S3 ... Sn) crosses the cross section of the radiation beam (31, 32, 33). essentially completely irradiated. Emitter according to the preceding claim, wherein the free-form surfaces of the shell segments (S1, S2, S3 ... Sn) and their trailing edge (A) are contoured such that a cross-sectionally round, in particular circular or elliptical or oval, beam (31, 33 ) is radiated. A radiator according to the preceding claim, wherein the reflector (11, 13) comprises at least four shell segments (S1, S2, S3, S4 ... Sn), each of which has a biaxial concave curvature, wherein fold-like indentations (E) the transition areas between each two form adjacent shell segments (S1, S2, S3, S4). Radiator according to one of the preceding claims, wherein the trailing edge (A) of the shell segments (S1, S2, S3 ... Sn) in each shell segment (S1, S2, S3, Sn) has an arcuate, concave profile, so that the shell segments on their edges to the transition areas to the adjacent shell segments towards a greater height than in a central portion of the shell segments. Radiator according to one of the preceding claims, wherein the shell segments (S1, S2, S3, Sn) in each case contoured strip or channel-shaped and are arranged in a star shape when viewing the reflector (11, 12, 13) in the direction of the main radiation. Radiator according to one of the preceding claims, wherein the shell segments (S1, S2, S3, S4) are provided with a faceting, in particular with a micro-faceting with more than 25 or more than 50 facets per shell segment.

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