EP3309450A1 - Device for illuminating surfaces arranged at an angle to each other - Google Patents

Abstract

The present invention relates to a device for illuminating two mutually angularly arranged surfaces, in particular wall and floor surfaces, with at least one radiator having at least one light source and a deflection optics comprising a reflector and / or a lens, wherein the deflection optics emitted by the light source captures and radiates in the form of a beam on both surfaces, so that in each case a patch is illuminated on both surfaces, wherein the beam comprises an indirect light component reflected by the deflection optics and an unreflected by the deflection optics direct light component, which partially overlap each other. According to the invention, the deflecting optics are configured to limit the unreflected direct light component such that the said direct light component only falls on one of the two mutually angled surfaces and an edge of the surface piece irradiated by the direct light extends along the angular transition between the two surfaces.

Description

The present invention relates to a device for illuminating two mutually angularly arranged surfaces, in particular wall and floor surfaces, with at least one radiator having at least one light source and a deflection optics comprising a reflector and / or a lens, wherein the deflection optics emitted by the light source captures and radiates in the form of a beam on both surfaces, so that in each case a patch is illuminated on both surfaces, wherein the beam comprises an indirect light component reflected by the deflection optics and an unreflected by the deflection optics direct light component, which partially overlap each other.

For various lighting tasks spotlights can be used, which steer the emitted light cone targeted on the floor or a wall via a deflection optics to illuminate corresponding surface pieces on the floor and / or the wall. Here are spotlights that are mounted at the upper end of a wall adjacent to this, for example, on the ceiling, and illuminate the wall, sometimes referred to as wallwasher. Generally radiating down to a floor surface spotlights are sometimes referred to as a downlight, with such Spotlights can be integrated, for example, in ceiling panels and combined in matrix-like radiator arrangements.

Such emitter assemblies are not only popular for lighting rooms and halls, but can also be used as shop lighting, for example for illuminating showcases, as shelf lighting, kitchen lighting, corridor lighting, stairwell lighting or in conference rooms for table or flipchart lighting. Furthermore, such radiator arrangements can also be installed in electrical appliances such as refrigerators and ovens to illuminate wall and / or bottom surfaces of the appliances.

In addition to pure downlight systems, it is sensible and desirable not only to illuminate the floor surfaces, but also to illuminate wall surfaces in order to achieve vertical brightening. In order to achieve an even illumination of the wall surfaces, pronounced, asymmetrical light distributions are necessary, so that not an upper wall section lying close to the radiator radiates much brighter than a wall section lying further down.

If surface elements at the bottom and at the adjacent, vertical wall are illuminated by a spotlight at the same time, inhomogeneities regularly occur in the illumination of the surface elements, which usually occur in the region of the wall surface, in particular in the form of brightness edges, which is a more strongly illuminated partial surface piece of one delimit weakly illuminated partial area piece. If it is not easy to achieve an actually homogeneous, uniform light intensity distribution in pure wallwashers, which illuminate only one wall surface piece, which usually requires complex free-form surfaces on the deflection optics, this task is made even more difficult if at the same time floor and wall surface pieces or generally two to each other angularly arranged surfaces are to be illuminated. Basically, it would be here to separate these tasks from each other and a downlight for the lighting of the floor and a wallwasher for the Lighting the wall surface to use. However, this is sometimes undesirable for aesthetic reasons and often for cost reasons, so that the problem is to illuminate with one spotlight both floor and wall pieces of surface or generally two mutually angled surfaces evenly without inhomogeneities such as light-dark edges.

On this basis, the present invention seeks to provide an improved lighting device of the type mentioned above, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner. In particular, an improved spotlight is to be created, which can illuminate mutually angled surfaces without visible inhomogeneities evenly.

According to the invention, said object is achieved by a device according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

It is therefore proposed to design the deflecting optics of the radiator in such a way that the direct and indirect light components of the radiation beam are not congruent to one another and insofar as an inhomogeneity in the illumination is permitted, the resulting bright-dark boundary between the illuminated surface only by Indirectlicht and the area illuminated by direct light, however, is banished into the transition between the two angular surfaces and thus made more or less invisible. According to the invention, the deflecting optics are configured to limit the unreflected direct light component such that the said direct light component only falls on one of the two mutually angled surfaces and an edge of the surface piece irradiated by the direct light extends along the angular transition between the two surfaces. The typical brightness edge which is not removed at the transition of the surface area which is irradiated by both direct light and indirect light to the area area which is irradiated only by indirect light, but is displaced into an area in which this brightness edge not noticeable, and thus made almost invisible to the human eye. Due to the fact that there is still a surface piece irradiated only by indirect light and a surface piece irradiated both by indirect light and direct light, the contours of the optically active surfaces of the deflection optics remain manageable in order to achieve uniform light intensity distributions on the respective surface piece. In particular, the wall surface piece, which is sandblasted in the manner of a wall washer, be illuminated uniformly and the necessary highly asymmetric light distribution can be achieved.

Said deflection optics can achieve the limitation of the direct light component in the beam bundle with a direct light edge extending along the transition between the angular surfaces both through a reflector and through a lens, it being possible for both a reflector and a lens to be provided. If the deflecting optics uses a reflector which captures light emitted by the light source with at least one reflector surface and transforms it into a beam, the reflector in a further development of the invention can comprise a spoiler edge delimiting the reflector surface, which delimits and directs the uncoordinated direct light component said direct light portion falls only on one of the two mutually angularly arranged surfaces and the edge of the area illuminated by the direct light portion of the sheet extends along the transition between the two angularly arranged surfaces.

If, as an alternative or in addition to such a reflector, the deflecting optics has a lens, the light captured by the lens can be totally reflected on a lateral surface of the lens by appropriate contouring of the lens or possibly also reflected with appropriate coating, while a light passing centrally through the lens Direct light component is radiated unreflectively from the light exit surface of the lens. In the case of the lens, the direct light component means the light component passing through the lens which is not reflected or totally reflected at the lens panel surface, but goes directly from the light entrance to the light exit surface where it is deflected by refraction. The for this direct light component Responsible light entry and exit surfaces of the lens can in this case be contoured such that said direct light portion of the emitted beam is limited in the above manner on one of the surfaces, in particular the bottom surface and extends the edge of the direct light irradiated patch along said angular transition region ,

For clarification, it should be noted that the angular transition region between the two angularly arranged surfaces no sharp edge needs to be formed in the sense of the mathematical intersection of two levels, but may also be rounded, as for example in Stuckleisten or formed in fillet moldings to beautify the transition between ceiling and wall or wall and floor is known.

In order to prevent larger inhomogeneities arising on the surface to which the direct light component is radiated, the deflection optics can advantageously be embodied such that the surface piece irradiated by the direct light component is substantially completely irradiated by the indirect light component as well. In other words, the indirect light component can also be thrown onto the surface which is irradiated by the direct light component such that the surface pieces respectively irradiated by the direct light component and the indirect light component are congruent or at least approximately congruent to one another on this surface.

The deflecting optics can be designed in such a way that the reflected indirect light component falls both on one and on the other of the two angularly arranged surfaces, wherein the indirect light component falling on the one surface and the indirect light component falling on the other surface form a homogeneous transition between the two Both surfaces and / or may have a uniform light intensity distribution across the border of the two areas.

The area pieces illuminated in each case on the two surfaces can in principle be contoured differently, for example, on the wall rectangular surface piece and on the ground a semi-circular or triangular surface piece to be illuminated. In an advantageous development of the invention, the deflecting optics can be designed to illuminate a respective rectangular surface piece both on the wall surface and on the bottom surface. On the one hand, the contours of the deflecting optics delimiting the direct light component can be shaped in such a way that the area piece irradiated by the direct light has a rectangular outline contour. On the other hand, the reflecting or totally reflecting surfaces of the deflecting optics can be contoured in such a way that the indirect light component of the radiation beam also irradiates a respective rectangular surface piece on the bottom and the wall or on the two surfaces arranged at an angle to one another.

Depending on the lighting task, the spotlight can be arranged or mounted differently. If an upright wall surface and a lying floor surface are illuminated by the radiator, the radiator can be arranged at an upper end portion of the wall spaced therefrom, in particular mounted flush with the ceiling and / or recessed into an adjacent ceiling and a down to the floor and / or have the wall directed to the main emission direction, so that the wall surface is abrasive irradiated and the bottom surface is irradiated approximately frontally.

Advantageously, the deflecting optics can be designed such that the surface piece lying on the wall surface, which is illuminated by the radiation beam of the radiator, in particular its indirect light component, extends from the bottom to substantially the height of the radiator. If the radiator is mounted in the above-mentioned manner flush with the ceiling or arranged on the ceiling, said surface piece may extend from floor to ceiling of the corresponding room.

If the deflecting optics has a reflector, the named reflector can be subdivided into a plurality of reflector segments and / or formed as multi-shelled. Different reflector segments can illuminate different surface pieces. Alternatively, different reflector surface segments also Overlapping surface pieces, in particular illuminate to each other congruent surface pieces, for example, in such a way that each of the plurality of reflector surface segments illuminates both the entire wall surface piece and the entire bottom surface piece.

However, if the reflector surface segments are designed to illuminate different surface pieces, it may be provided in particular that a first reflector surface segment illuminates the bottom surface piece and a second reflector surface segment illuminates the wall surface piece and the transition of the surface pieces irradiated by the two reflector surface segments along the fold or the angular transition extends between the two surfaces. In principle, it would also be possible to provide more than two reflector surface segments, wherein the reflector surface segments may be determined in groups to irradiate, on the one hand, the bottom surface piece and, on the other hand, the wall surface piece. For example, it may be provided in a four-shell reflector that two reflector surface segments together irradiate the wall surface piece to be illuminated, while two other reflector surface segments together illuminate the bottom surface piece. It can be provided that illuminate the wall surface piece reflector segments each illuminate the entire wall surface piece, i. each of the plurality of reflector surface segments provided for illuminating the wall surface can illuminate 100% of the respective sheet on one of the angled surfaces. In principle, however, it would also be possible to provide a lower degree of overlap, for example such that each of the patches only illuminates more than 50% or more than 66% or more than 75% of the total patches on one of the surfaces.

If the deflection optics comprise a lens, the lens can likewise be subdivided into a plurality of lens segments, wherein a first lens segment can direct the captured light onto a first of the two surfaces and a second lens segment can direct the trapped light onto a second of the two surfaces, in particular in such a way that that one lens segment only one surface and the other Lens segment irradiated only the other surface. Alternatively or additionally, however, it is also possible to provide a plurality of lens segments which irradiate overlapping area pieces or the same, congruent area pieces, it also being possible here for a lens segment to be able to irradiate both a wall surface piece and a bottom area piece. In this respect, the statements made previously for the reflector apply analogously to the lens.

In order to achieve a further homogenization of the radiation, to compensate manufacturing and positioning tolerances of the light source and possibly to achieve an improved light color mixture with several differently colored light sources, the deflection optics can be provided with a faceting and / or a microstructuring at their reflecting or totally reflecting surfaces be. For example, microfacets may be provided, which may be formed in the form of flat flats, concave dents or convex pimples, wherein a plurality of such facets may be provided on a photometrically active surface, for example more than 25 or more than 50 or more than 100 such facets a multi-row and / or multi-column arrangement. Alternatively or additionally, other relief-like microstructures such as geometrically regular relief contours such as truncated pyramids, conical elevations or depressions or similar structures may be provided.

Said faceting and / or microstructuring may in this case be provided on the reflector surfaces of a reflector or on the totally reflective lateral surfaces of a lens, it being possible for such a lens also to be provided with a reflective surface coating on which the said faceting or microstructuring is provided may be, but alternatively or additionally, said faceting or microstructuring may also be provided on the light entry surface and / or the light exit surface of the lens.

In an advantageous embodiment of the invention, the deflection optics is designed to be simply reflective, so that the captured by the deflection optics light only is reflected once before it is blasted onto the patch on the wall or on the floor.

Fig. 1:

eine schematische, perspektivische Darstellung eines Strahlers zum Beleuchten von aneinander grenzenden Wand- und Bodenflächen, wobei in der Fig. 1 nur der unreflektiert abgestrahlte Direktlichtanteil, der ein Flächenstück auf dem Boden bestrahlt, dargestellt ist, wobei in der Teilansicht (a) die Umlenkoptik des Strahlers einen Reflektor umfasst und in der Teilansicht (b) die Umlenkoptik eine Linse und den hiervon unreflektiert abgestrahlten Direktlichtanteil zeigt,

Fig. 2:

eine schematische Darstellung des Strahlers aus Fig. 1 in einer perspektivischen Ansicht, wobei nur der das Flächenstück auf der Wand beleuchtende Indirektlichtanteil dargestellt ist, wobei wiederum die Teilansicht (a) die Ausbildung der Umlenkoptik mit einem Reflektor und die Teilansicht (b) die Ausbildung der Umlenkoptik mit einer Linse zeigt, und

Fig.3:

eine schematische Darstellung des Strahlers aus Fig. 1 in einer perspektivischen Ansicht, wobei nur der das Flächenstück auf dem Boden beleuchtende Indirektlichtanteil dargestellt ist, wobei wiederum die Teilansicht (a) die Ausbildung der Umlenkoptik mit einem Reflektor und die Teilansicht (b) die Ausbildung der Umlenkoptik mit einer Linse zeigt.

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

Fig. 1:

a schematic perspective view of a radiator for illuminating adjacent wall and bottom surfaces, wherein in the Fig. 1 only the unreflected emitted direct light component, which irradiates a surface piece on the ground, is shown, wherein in the partial view (a) the deflection optics of the radiator comprises a reflector and in the partial view (b) the deflection optics shows a lens and the unreflectively emitted direct light component thereof,

Fig. 2:

a schematic representation of the radiator Fig. 1 in a perspective view, wherein only the surface piece on the wall illuminating Indirectlichtanteil is shown, again the partial view shows (a) the formation of the deflection optics with a reflector and the partial view (b) the formation of the deflection optics with a lens, and

Figure 3:

a schematic representation of the radiator Fig. 1 in a perspective view, wherein only the surface piece on the bottom illuminating Indirectlichtanteil is shown, again the partial view (a) shows the design of the deflection optics with a reflector and the partial view (b) the formation of the deflection optics with a lens.

As the figures show, the illumination device may comprise a radiator 1 which radiates two mutually angularly arranged surfaces, for example in the form of an upright wall 2 and a lying floor 3, wherein the radiator 1 more precisely each surface pieces 4 and 5 on said wall 2 and the bottom 3, which adjoin one another and, as it were, pass over the fold 6 or the angular transition between the wall 2 and the floor 3.

As Fig. 1 shows, the said surface pieces 4 and 5 may each be formed rectangular, which is achieved by a corresponding training or contouring of the deflection optics 7, which will be explained in more detail.

As Fig. 1 In its partial view (a), the deflecting optics 7 may comprise a reflector 8, which captures the light emitted by a light source 10 and transforms it into a beam bundle which comprises both the wall 2 and the bottom 3 or the surface pieces 4 and 5 lying thereon illuminated.

As the light source 10, for example, an LED may be provided, which may be provided on a printed circuit board 11 or another light source carrier, said reflector 8 sitting on said circuit board 11 and the light source 10 may enclose. Optionally, the radiator 1 may also comprise more than one light source 10, for example a plurality of juxtaposed LEDs, which may have different colors or the same color.

The radiator 1 may advantageously be arranged at the upper end portion of the wall 2 to be illuminated spaced therefrom, for example, be mounted on an adjacent ceiling, said radiator 1 can be mounted ceiling flush and / or sunk in said ceiling, as for example of downlights or Wallwashern is known per se.

In this case, the emitter 1 has a main emission direction directed downwards onto the bottom 3 and / or the wall 2, wherein in particular the said reflector 8 can "look down" onto the bottom and / or the wall 2.

Advantageously, the light source 1 and / or the printed circuit board 11, on which the light source 10 is arranged, inclined at an acute angle to the ceiling and / or angled at an angle to the surface of the bottom 3, in particular such that the height of the printed circuit board 11 increases with increasing distance from the wall 2. In principle, a ceiling and / or floor parallel arrangement would be possible. By tilting the board or the circuit board 11, however, a more flexible lumen distribution between the wall 2 and bottom 3 can be achieved.

The reflector 8 comprises a photometrically active reflector surface 8a, which may be formed by the cup-shaped inner contour of the reflector 8, and optionally a photometrically not active, the said reflector surface 8a enclosing collar 8k, wherein the transition between said collar 8k and the photometrically active reflector surface 8a forms the tear-off edge 8b, which limits the direct light portion 12d of the beam 12 emerging from the reflector 8 in an unreflected manner, cf. Fig. 1a ,

The light source 10 may be arranged to the reflector 8 such that the light source 10 radiates into a half-space, which extends from the bottom of the reflector 8 via the outlet cross-section. In other words, the light source 10 can radiate out of the reflector 8, so that it comes to the said direct light portion 12 d.

On the other hand, part of the light emitted by the light source 10 falls on the photometrically active reflector surface 8a, from which this light is reflected and emitted. The reflector 8 is in this case designed to be simply reflective, so that the light emitted by the light source 10 is reflected at the reflector 8 at most once.

As Fig. 1 (a) shows, the reflector 8 is contoured with its trailing edge 8b such that the direct light portion 12d of the beam 12 falls exclusively on the ground 3, wherein the edge of the illuminated by the direct light portion 12d area piece 5 in the fold 6 or in the angular transition region between the bottom 3 and Wall 2 is located. Said reflector 8 forms with its tear-off edge 8b a circumferential Abblendkontur which dimmers the wall 2 relative to the direct light portion 12d and limits the direct light portion 12d on the bottom 3 on the surface piece 5.

On the other hand, the reflector 8 is contoured with its optically active reflecting reflector surface 8a such that the reflected indirect light component 12i on the one hand irradiates said surface piece 5 on the bottom 3 and on the other hand the surface piece 4 on the wall 2.

The reflector 8 may in this case be multi-shelled and / or subdivided into a plurality of segments, so that a first reflector surface segment 8aa irradiates the surface piece 4 on the wall 2, cf. Fig. 2 (a) and a second reflector surface segment 8ab irradiates the sheet 5 on the bottom 3, cf. Fig. 3 (a) ,

The aforementioned reflector surface segments 8aa and 8ab or generally the photometrically active reflector surface 8a of the reflector 8 are advantageously contoured such that the indirect light portion 12i on the one hand completely illuminates the surface piece 5, ie irradiates a surface piece 5 which is essentially congruent or congruent to the surface piece 5 is, which is irradiated by the direct light portion 12d. On the other hand, the reflector surface 8a, in particular its segment 8aa, irradiates the surface piece 4 on the wall 2. The mentioned segments 8aa and 8ab can be such that each segment irradiates only one of the two mentioned surface pieces 4 and 5. Alternatively, an overlapping irradiation may also be provided, in particular in such a way that each of the aforementioned reflector surface segments 8aa and 8ab irradiates both surface areas 4 and 5 completely. Mixed forms are also possible, for example such that the first reflector surface segment 8aa completely irradiates the surface piece 4 on the wall 2 and part of the surface piece 5 on the bottom 3, while conversely the other reflector surface segment 8ab completely covers the surface piece 5 on the bottom 3 and a part of the patch 4 irradiated on the wall 2.

Like the partial views (b) of the FIGS. 1 to 3 1, the deflecting optics 7 of the radiator 1 can also comprise a lens 9 which essentially completely captures the light from the at least one light source 10 of the radiator 1 and transforms it into a beam 12, which in this way is directed downwards to the floor 3 and / or or the wall 2 is emitted too directionally. The lens 9 may in this case comprise a cup-shaped light inlet opening or surface 13 which can cover the light source 10 in a dome shape so that the light source 10 radiating into the half-space radiates substantially completely into the aforementioned dome-shaped or cup-shaped light entry surface 13.

In this case, the lens 9 may comprise a central region, which passes the captured light from the light source 10 without total reflection and radiates again at the opposite light exit surface 14, in the form of the direct light portion 12d of the beam 12. Wie Fig. 1 (a) shows, the said direct light portion 12 d, the lens 9 radiates, have a pyramidal or conical expansion, so that the direct light portion 12 d as described above substantially completely the surface piece 5 irradiated on the bottom 3, in which case an edge of the irradiated surface piece. 5 extends substantially along the fold 6 between the bottom 3 and wall 2.

The above-mentioned central region of the lens 9 surrounds an annular outer region of the lens 9, in which the light trapped at the light entry surface 13 is first deflected outwards to the lateral surface of the lens 9, at which the light totally reflects or - when attaching a reflective coating the lateral surface - is reflected, so that the (total) reflected rays are directed to the light exit surface 14, from which the rays are then emitted as Indirektlichtanteil 12i of the beam 12. The light entry surface 13, the lateral surface and the light exit surface 14 are in this case contoured such that the light rays are only (totally) reflected and the only reflected light is emitted in the form of a widening beam. In this case, this indirect light component 12i irradiated by the lens 9 radiates, on the one hand the surface piece 5 on the bottom 3 and on the other hand, the surface piece 4 on the wall 2, wherein the two radiating regions can homogeneously merge into each other in terms of their light intensity. Advantageously, the indirect light component 12i irradiates the aforementioned bottom-side surface piece 5, which is also irradiated by direct light component 12d, essentially completely, so that the direct and indirect light components superimposed there irradiate mutually congruent surface pieces.

Like a comparison of Figures 2 and 3 , there each partial views (b), shows, different segments of the lens 9 can cause the one hand, the irradiation of the wall-side surface piece 4 and on the other hand, the irradiation of the bottom-side surface piece 5. In this case, the lens 9 can be subdivided into two separate lens segments, each of which can comprise the abovementioned annular outer or shell section of the lens 9 or segments thereof. Advantageously, the lens 9 can be contoured in this case such that a ring segment of the lens 9 facing away from the wall 2 irradiates the surface piece 4 on the wall 2, while a ring segment of the lens 9 facing the wall 2 irradiates the base-side surface piece 5, cf. Figures 2 and 3 , there partial view (b).

The lens 9 may also be provided on its surface with a faceting or a microstructuring as explained above, in particular on its lateral surface or at its light exit surface 14, possibly also at the light entry surface 13, to a better mixing of the light, possibly different light colors to achieve with multiple light sources.

Claims (15)

Device for illuminating two mutually angularly arranged surfaces, in particular wall and bottom surfaces (2, 3), with at least one radiator (1), the at least one light source (10) and a deflection optics (7) comprising a reflector (8) and / or a lens (9), wherein the deflection optics (7) from the light source (10) captures light emitted and in the form of a beam (12) on both surfaces, so that in each case a surface piece (4, 5) is illuminated on both surfaces , wherein the beam (12) comprises an indirect light component (12i) reflected by the deflecting optics (7) and a direct light component (12d) unreflected by the deflecting optics (7), which are partially superimposed, characterized in that the deflecting optics (7) is formed to limit the unreflected direct light portion (12d) so that the direct light portion (12d) falls only on one of the two surfaces and an edge of the direct light portion (12d) irradiated Surface piece (5) along the angular transition (6) extends between the two surfaces. Device according to the preceding claim, wherein the direct light portion (12d) is delimited by a trailing edge (8b) of the reflector (8) contoured such that the direct light portion (12d) falls only on the one of the two faces and the edge of the extends from the direct light portion irradiated area piece (5) along the angular transition (6) between the two surfaces. Device according to claim 1, wherein the direct light portion (12d) is formed by light entry and exit surfaces (13, 14) of the lens (9) contoured such that the unreflected direct light portion (12d) is applied to only one of the two surfaces falls and the edge of the irradiated by the direct light portion surface piece (5) along the angular transition (6) between the two surfaces. Device according to one of the preceding claims, wherein the deflection optics (7), in particular a photometrically active reflector surface (8ab) of the reflector (8) or a lateral surface of the lens (9) in interaction with their light entry and exit surfaces (13, 14), is designed to distribute the reflected Indirect light portion (12i) on the entire surface piece (5), which is also irradiated by the direct light portion (12d). Device according to one of the preceding claims, wherein the deflection optics (7) is adapted to distribute the reflected Indirect light portion (12i) on both angularly arranged surfaces and thereby distribute the Indirektlichtanteil on the irradiated by the direct light portion (12d) surface so that the of the direct light component (12d) and of the indirect light component (12i) are each at least approximately congruent surface areas irradiated. Device according to one of the preceding claims, wherein the deflection optics (7) is adapted to the direct light portion (12d) on a Throwing floor surface (3) and throw the Indirectlichtanteil (12i) on said bottom surface (3) and an adjacent wall surface (2). Device according to the preceding claim, wherein the radiator (1) arranged on a ceiling of the adjacent wall surface (2) spaced, in particular recessed flush mounted, and down to the bottom (3) and / or the wall (2) has directed main radiation, wherein the wall surface (2) at an acute angle abrasive irradiated and the bottom surface (3) is irradiated at least approximately frontally. Device according to one of the two preceding claims, wherein the deflection optics (7) is adapted to the Indirectlichtanteil (12i) on the adjacent wall surface (2) with a uniform light intensity distribution substantially over the entire height of the wall surface (2) from the bottom (3). to distribute to the height of the radiator (1). Device according to one of the preceding claims, wherein the deflection optics (7) is designed to be simply reflective and the entire light emitted by the light source (10) and captured by the deflection optics (7) is reflected at most once. Device according to one of the preceding claims, wherein at least one photometrically active surface of the deflection optics (7) is provided with a faceting and / or microstructuring. Device according to one of the preceding claims, wherein the deflecting optics (7) is contoured in such a way that the area pieces (4, 5) irradiated by the direct light component (12d) and the indirect light component (12i) each have rectangular outer contours on the mutually angled surfaces. Device according to one of the preceding claims, wherein the at least one light source (10) and / or a light source (10) carrying Printed circuit board (11) is arranged at an acute angle inclined to both irradiated surfaces such that a major axis which passes through the light source (10) and / or aligned perpendicular to the printed circuit board (11), from the abrasive irradiated surface (2) an increasingly larger Distance has, the closer the said major axis of the other, frontally irradiated area (3) comes. Device according to one of claims 1 to 11, wherein the at least one light source (10) and / or a light source (10) carrying the printed circuit board (11) is arranged at an acute angle to both irradiated surfaces such that a main axis through the light source (10) goes and / or perpendicular to the circuit board (11) is aligned, of the abrasive irradiated surface (2) has an increasingly smaller distance, the closer the said major axis of the other, frontally irradiated surface (3) comes. Device according to one of the preceding claims, wherein the deflection optics (7) comprises a multi-shell and / or divided into multiple segments reflector (8), wherein a first reflector surface segment (8aa) transforms the captured light in a Indirektlichtlichtanteil, the surface piece (4) a first of the two surfaces is irradiated while a second reflector surface segment (8ab) transforms the captured light into an indirect light portion which irradiates the sheet (5) on the other of the two surfaces. Device according to one of the preceding claims 1-13, wherein the deflection optics (7) has a lens (9) subdivided into a plurality of lens segments, wherein a first lens lateral surface segment transforms the captured light into an indirect light component (12i) which fixes the surface piece (4) on a lens the first of the two surfaces is irradiated while a second lens shell surface segment transforms the captured light into an indirect light portion (12i) which irradiates the sheet (5) on the other of the two surfaces.

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