EP3540299B1 - Luminaire - Google Patents

Description

The present invention relates to a lamp with a light source, a primary lens for capturing the light from the light source and emitting a light cone with a main emission direction, and an annular reflector with a central recess that deflects an outer part of the light cone transversely to the main emission direction and an inner part of the Light cone can pass through the recess.

With a lamp like the one in writing JP 2003 258 319 A or EP 2 884 155 A1 show, on the one hand, a certain area of the room can be highlighted and, on the other hand, evenly illuminating the entire room. The light bundle passing through the non-reflective recess of the reflector surface illuminates a certain area of the room, wherein said light bundle can shine from top to bottom, for example in the manner of a downlight, and illuminate a floor area. Depending on the widening of the light bundle, this can be a relatively large area that is uniformly illuminated by the light bundle, or a relatively small, narrow area, the luminaire in the latter case setting a light accent and an object such as a showcase or a table or highlights a similar area of the room like a spot. The part of the light cone captured by the reflector becomes wide in the room at right angles to the main direction of radiation of the light cone thrown and can in particular brighten a ceiling or a wall on which the lamp is mounted. At the same time, a part of the light cone of the primary lens that is widened obliquely to the main radiation direction is blocked out by the reflector, whereby glare can be avoided if a person looks obliquely into the lamp, for example obliquely from below at the lamp mounted on the ceiling.

For example, such lights can be mounted on a ceiling as combined downlights and ceiling brighteners, in particular as a surface-mounted light that can be mounted on the underside of the ceiling, or possibly also as a pendant light spaced from the ceiling. Alternatively or additionally, the lamp can also be mounted on an upright wall, for example to accentuate a picture hung on an opposite wall and at the same time to brighten the wall on which the lamp is mounted.

One problem with such luminaires is that a grid or a series of such luminaires are often installed in a room, which should have a uniform, as identical as possible appearance, but at the same time often have to fulfill different lighting tasks with different light distribution characteristics. For example, if such lights are attached to the ceiling in a fixed, even grid, while showcases of different sizes and / or unevenly distributed showcases on the floor are to be illuminated, the lights, especially the part of the cone of light emitted through the recess in the reflector, have to illuminate different areas.

At the same time, the above-mentioned lights with primary lens and reflector tend to get dirty and thus decrease in efficiency and brilliance. Dust and dirt entering via the recess in the reflector or laterally via the emission area of the reflector can settle both on the reflector surface and on the lens. US 2013.100.677 discloses a lamp.

The present invention is therefore based on the object of creating an improved luminaire of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner. In particular, the luminaire should be improved with regard to the variability of its radiation characteristics and a permanently efficient, brilliant light-technical radiation should be achieved.

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

It is therefore proposed to shape the light cone part passing through the recess in the reflector again and to provide a secondary lens for this purpose, which is arranged in the recess of the reflector and can be exchanged in order to differently reshape the light bundle emerging through the recess of the reflector and adapt it to the respective To be able to adapt the accentuation task. According to the invention, a secondary lens is inserted into the said recess of the reflector and designed to expand, narrow and / or reshape the unreflected, inner part of the light cone of the primary lens. Said reflector is arranged at a distance from the primary lens and held by a sleeve-shaped, transparent housing part which encloses the reflector and the primary lens, so that the light deflected by the reflector transversely to the main emission direction passes through the said transparent housing part. The primary lens forms all of the light from the light source into an acute-angled radiation cone, which can widen at an acute angle, especially in the main radiation direction, so that a widened edge of the radiation cone falls on the axially spaced reflector and is deflected transversely by it, while the central part of the widened radiation cone passes through the secondary lens.

For clarification, it should be noted that the aforementioned primary lens does not mean the light source component that is sometimes provided directly on the light source itself and has a lens-like effect, which, for example, in LEDs, is bell-shaped on the Semiconductor element sits, but is a separate component downstream of the light source, which is connected to the light source, for example, can sit on its circuit board, but is, so to speak, subsequently arranged downstream of the already finished light source. In particular, the luminaire with such an (additional) primary lens can act as a luminaire even without the specified reflector and achieve a radiation cone or an asymmetrical radiation lobe with a desired light distribution characteristic when the specified reflector is dismantled together with the secondary lens .

In an advantageous development of the invention, a set of several secondary lenses can be provided, which include at least one converging lens and at least one diverging lens and have mutually corresponding external connection dimensions and / or contours so that they can be interchangeably inserted into the recess, depending on the desired emission characteristic of the light cone part passing through the recess through the reflector, another of the interchangeable lenses mentioned can be used. With such a set of interchangeable secondary lenses, the luminaire forms a luminaire module that can be easily and variably adapted in terms of its radiation characteristics and has a modular structure that nevertheless has a uniform external appearance regardless of the various radiation characteristics.

By using different secondary lenses such as converging lenses or scattering lenses, the expansion of the light beam emitted by the secondary lens can be adapted to the respective lighting task and in particular to different ceiling heights. For example, in order to irradiate a certain floor area with a given, low ceiling height, a diffusing lens can be used, while a secondary lens with less expansion can be used to irradiate the same floor area with a given higher ceiling height. Regardless of the ceiling height, you can also use different secondary lenses and different expansion angles different areas of the room are illuminated, for example a larger floor area is uniformly irradiated or a smaller object such as a showcase is more strongly accentuated.

However, the named secondary lens does not necessarily have to have a widening or constricting effect. For example, it can also be useful if the set of secondary lenses includes a deflecting lens, by means of which the main emission direction can be changed so that the light beam, when passing through the reflector recess and the secondary lens provided there, bends slightly and / or undergoes a cross-sectional reshaping, for example from a circular cross-section to an elliptical or polygonal cross-section. In general, the secondary lens can be designed to generate an asymmetrical light distribution in order, for example, to illuminate one sub-area more intensely and another sub-area less intensely in an overall illuminated spatial area. Such a shaping lens can also illuminate spatial areas that are not positioned directly in the main radiation direction of the primary lens, or, for example, rectangular carpets can be almost completely illuminated.

Furthermore, instead of such a lens, it is possible to insert a shadowing or cover into the reflector recess in order to completely shadow or greatly reduce the light beam emerging there. Such complete shading of the main radiation direction can be useful, for example, if the luminaire is to be mounted on an upright wall and / or in an installation situation in which essentially only the lighting of the wall and / or ceiling area surrounding the luminaire is desired. Such a cover, which in terms of its connection dimensions and / or contours corresponds to the aforementioned secondary lenses and can be inserted into the reflector recess in an analogous manner, can advantageously be designed to be reflective and / or scattering, for example white on the surface, on its side facing the primary lens to keep the efficiency of the luminaire high and no longer through the reflector recess emit emerging light sideways past the reflector. As an alternative or in addition, such a cover cap can also be provided at least in sections with a faceting, for example reflector facets, on its side facing the primary lens, in order to deflect the light laterally transversely to the main emission direction.

In order to enable the various secondary lenses or the cover cap to be easily exchanged, the above-mentioned various secondary lenses and / or the cover cap can advantageously be inserted into the recess of the reflector from a front side in exchange for one another. The front side means that side of the lamp towards which the light component passing through the secondary lens or the recess in the reflector is emitted. In particular, the secondary lenses with different emission characteristics and / or the aforementioned cover cap and the recess of the reflector can be contoured at the edge in such a way that the secondary lenses and / or the cover cap can be inserted into the recess of the reflector in the direction of the main emission direction from the front. For example, the recess can widen conically towards the front or widen in a step shape, while the secondary lenses and / or the cover cap can taper towards the primary lens, for example conically or step-shaped, in order to fit precisely into the recess.

In an advantageous development of the invention, the respective secondary lens - or possibly the mentioned cover - can be detachably attached directly to the reflector and essentially completely close the recess of the reflector, with releasable connecting means that are compatible with one another being provided on the edge of the secondary lens and on the edge of the recess can. Such releasable connecting means can advantageously comprise a form-fitting snap connection, by means of which the secondary lens can be snapped into the reflector recess. As an alternative or in addition, however, other form-fitting connecting means can also be provided, for example a collar on the edge of the recess that covers or encompasses Secondary lens with which the secondary lens can rest on the recess edge of the reflector. As an alternative or in addition, the recess in the reflector can also comprise such a collar, so that the lens can be inserted into the recess and can rest against the collar.

The mentioned secondary lens does not have to be detachably or interchangeably attached to the reflector, but can also be permanently attached to it, for example by gluing, in which case the desired secondary lens is selected by the manufacturer in the manufacturing process. It should also be noted that the lens can also be formed integrally in one piece with the reflector, for example by injection molding the reflector and secondary lens in one piece from plastic. In this respect, the recess of the reflector explained in the context is to be understood as a non-reflecting recess in the reflection surface, which does not reflect light but lets it through, but does not have to be a material-free through hole.

In an advantageous development of the invention, the luminaire can have a luminaire housing which surrounds the primary lens and the reflector surface of the reflector and protects against dust or contamination. In particular, a sleeve-shaped, transparent housing part can be provided, which connects the reflector with a lamp base support to which the light source and / or the primary lens are attached, so that the said housing part together with the reflector and the secondary lens forms a lamp housing that the primary lens encloses. Said transparent housing part can, for example, be injection molded from transparent plastic and / or comprise a glass.

Advantageously, said transparent housing part is designed to be closed and / or connected to the reflector and the luminaire base support part in a dust-tight manner in order to form a closed luminaire interior in which the primary lens, the rear of the secondary lens and the reflector surface of the reflector are accommodated in a protected manner.

Advantageously, said sleeve-shaped, transparent housing part can hold an outer edge of the reflector and / or be connected to it in order to hold the reflector, and to connect said outer edge of the reflector to the lamp base support, in particular an outer edge thereof.

The housing part can be detachably connected to the reflector and / or the base support part in order to be able to operate the lamp without a reflector and without a secondary lens only with the primary lens.

Said sleeve-shaped transparent housing part can advantageously form a circumferential wall which is straight when viewed in cross section, in particular it can be at least approximately cylindrical or conical. As an alternative or in addition, the housing part can also be contoured at least in sections in a bulbous or curved manner, i.e. the circumferential wall viewed in cross section can be concave or convex or also alternately concave and convex curved. Regardless of this, said housing part can be facet-free and / or provided with a smooth surface in order not to further deflect the reflected light passing through the housing part.

The aforementioned secondary lens, which can be inserted into the reflector recess, can be at least approximately plate-shaped in a further development of the invention, with a concave or convex surface curvature being provided as a collecting or scattering lens. Such an approximately plate-shaped design of the secondary lens makes it possible to achieve an overall compact, flat design of the light that ensures an attractive appearance even when mounted as a surface-mounted or surface-mounted light.

The secondary lens can advantageously be provided with a faceting, wherein such a faceting can comprise more than 25 or more than 50 or even more than 100 facets arranged in a regular arrangement pattern be positioned or can be distributed over the lens surface. With such a faceting of the secondary lens, a particularly homogeneous emission of the light bundle can be achieved and, if necessary, a color mixing can also be achieved, in particular when several differently colored point light sources such as LEDs are used as the light source.

As an alternative or in addition, the said reflector can also be provided with a faceting, which can likewise comprise more than 25 or more than 50 or even more than 100 facets, which can be distributed in a regular pattern over the reflector surface. Such a faceting of the reflector can also homogenize the transverse radiation and illuminate the ceiling or wall surface evenly.

The reflector can advantageously be configured to direct the captured light of the light cone of the primary lens transversely to its main radiation direction in an annular wedge area of 85 ° to 120 ° or 90 ° to 115 ° or in particular 95 ° to 110 ° to the aforementioned main radiation direction of the light cone of the primary lens to radiate. The reflector can therefore advantageously reflect the captured light at least partially against the main direction of emission, dragging around a plane lying behind or above the luminaire, i.e. lighten at an acute angle. The mentioned transverse radiation in an annular wedge with a relatively narrow widening angle of 85 ° to 120 ° or 95 ° to 110 ° or possibly also narrower from 95 ° to 105 ° can achieve a wide, uniform brightening of the room.

As an alternative or in addition, the secondary lens and the reflector can shield a spatial area which is annularly contoured and can lie between the light beam that is emitted by the secondary lens and the light beam that is emitted by the reflector. This shielded area can be, for example, an angular range of 60 ° to 85 ° to the main emission direction or 50 ° to 90 ° or 40 ° to 90 ° or also 30 ° to 90 °.

Fig. 1:

eine schematische Schnittansicht einer Leuchte nach einem Ausführungsbeispiel der Erfindung, bei dem nur eine Primärlinse vorgesehen ist und ein nachgeordneter Reflektor und eine nachgeordnete Sekundärlinse abmontiert sind, um die von der Primärlinse erzeugte Lichtverteilung bessert zu verdeutlichen,

Fig. 2:

eine schematische Schnittansicht der Leuchte aus Fig. 1, wobei der mit einer zentralen Aussparung versehene Reflektor montiert und der hiervon erzeugte, reflektierte Strahlengang dargestellt sind,

Fig. 3:

eine schematische Schnittansicht der Leuchte aus den vorhergehenden Figuren, wobei in die Aussparung des Reflektors eine aufweitende Sekundärlinse eingesetzt ist,

Fig. 4:

eine schematische Schnittansicht der Leuchte aus den vorhergehenden Figuren, wobei in die Reflektoraussparung eine Sekundärlinse mit mittlerer Abstrahlcharakteristik eingesetzt ist,

Fig. 5:

eine schematische Schnittansicht der Leuchte aus den vorhergehenden Figuren, wobei in die Aussparung des Reflektors eine Sammellinse als Sekundärlinse eingesetzt ist,

Fig. 6:

eine schematische Darstellung der Leuchte aus den vorhergehenden Figuren bei Montage an einer Decke, wobei der akzentuierende, über die Sekundärlinse abgestrahlte Downlightkegel und der seitlich die Decke aufhellende Reflektorkegel gezeigt sind,

Fig. 7:

eine schematische, perspektivische Darstellung des Reflektors, die die Facettierung der Reflektorfläche zeigt,

Fig. 8:

eine schematische, perspektivische Darstellung einer Sekundärlinse mit mittlerer Abstrahlcharakteristik,

Fig. 9:

eine schematische, perspektivische Darstellung einer Sekundärlinse mit einengender Abstrahlcharakteristik und einer Facettierung, und

Fig. 10:

eine schematische, perspektivische Darstellung einer Sekundärlinse mit aufweitender Abstrahlcharakteristik und einer Facettierung an der Reflektorfläche.

The invention is explained in more detail below with the aid of a preferred exemplary embodiment and associated drawings. In the drawings show:

Fig. 1:

a schematic sectional view of a lamp according to an embodiment of the invention, in which only one primary lens is provided and a downstream reflector and a downstream secondary lens are removed in order to better illustrate the light distribution generated by the primary lens,

Fig. 2:

a schematic sectional view of the lamp from Fig. 1 , whereby the reflector with a central recess is mounted and the reflected beam path generated by it is shown,

Fig. 3:

a schematic sectional view of the lamp from the previous figures, with an expanding secondary lens being inserted into the recess of the reflector,

Fig. 4:

a schematic sectional view of the luminaire from the previous figures, with a secondary lens with a medium emission characteristic being inserted into the reflector recess,

Fig. 5:

a schematic sectional view of the luminaire from the previous figures, with a converging lens being inserted as a secondary lens in the recess of the reflector,

Fig. 6:

a schematic representation of the luminaire from the previous figures when mounted on a ceiling, showing the accentuating downlight cone radiated via the secondary lens and the reflector cone that laterally illuminates the ceiling,

Fig. 7:

a schematic, perspective view of the reflector showing the faceting of the reflector surface,

Fig. 8:

a schematic, perspective representation of a secondary lens with a medium emission characteristic,

Fig. 9:

a schematic, perspective illustration of a secondary lens with narrowing radiation characteristics and a faceting, and

Fig. 10:

a schematic, perspective illustration of a secondary lens with widening radiation characteristics and a faceting on the reflector surface.

As Fig. 1 shows, the luminaire 1 comprises a light source 2 that radiates into a half-space, for example in the form of an approximately punctiform LED or a COB unit, ie chip on board light sources, with a multicolored LED grid optionally also being provided.

Said light source 2 is attached to a lamp base support 10, by means of which the lamp 1 can be mounted on a ceiling or on a wall. Said lamp base support 10 can form a plate-shaped component which can have an approximately flat mounting surface 10 for surface mounting. It goes without saying, however, that other mounting variants, for example rail mounting or suspended mounting, are also possible.

In the direction of emission in front of the light source 1, a primary lens 3 is connected, which can be attached to the said lamp base support 10, wherein the said lamp base support 10 can comprise, for example, a cup-shaped recess, preferably with white walls, which surrounds the light source 2 and on the edges of which said primary lens 3 sits.

As Fig. 1 shows, said primary lens 3 can have an essentially flat light entry surface facing the light source 2 and on the other hand have a dome-shaped, arched light exit surface 11, whereby the primary lens 3 viewed overall can be rotationally symmetrical and - roughly speaking - can have a mirror-like contouring.

Through the aforementioned cup-shaped recess in the luminaire base support 10 and the primary lens 3 seated directly on it, the light emitted by the light source 2 is essentially completely introduced into the primary lens 3 and emitted by the aforementioned primary lens 3 in the form of a light bundle or light cone 4, which has a main radiation direction 5 which essentially form the axis of symmetry of the primary lens 3 and / or can coincide with an axis of symmetry of the light source 2. In cross section, the light bundle can be circular or oval, elliptical or polygonal. Said light cone 4 advantageously shows a widening in the range from 2 × 20 ° to 2 × 70 ° or 2 × 30 ° to 2 × 60 °, but can in principle also have other widenings.

The lamp 1 could in itself as in Fig. 1 are used, in particular as a downlight, in which case the light cone 4 would form the entire radiation of the lamp 1.

As Fig. 2 shows, however, a reflector 6 can be connected to the luminaire base support 10, which is positioned in the light cone 4 of the primary lens 3 and captures its outer area at the edge, the reflector 6 being axially and / or radially spaced in front of the primary lens 3.

Said reflector 6 comprises a central recess 7, for example in the form of a circular through hole, but possibly also in the form of a rectangular or polygonal through hole. The clear width of the recess 7 mentioned can be of the order of magnitude - depending on the design of the expansion of the light cone 4 - 50% to 125% or 60% to 100% of the Diameter of the primary lens 3, so that the reflector 6 captures only the outer ring part of the light cone 4.

This part of the light cone 4 captured by the reflector 6 is deflected outward by the reflector 6 transversely to the main emission direction 5, wherein the said reflector 6 can be designed to have a wedge-shaped, annular area 12 of approx. 85 ° to 120 ° or 95 ° to 110 ° to the main radiation direction 5 to irradiate. The radiation area of the reflector 6 thus illuminates the ceiling or wall on which the lamp 1 is mounted and illuminates it broadly.

As Fig. 2 shows, the said reflector 6 can have a ring contour which, viewed in cross section, extends at an acute angle to the main radiation direction 5 of the primary lens 3 and can slope outwardly from the inner edge surrounding the recess 7 when the luminaire 1 in the in Fig. 2 position shown is.

Said reflector 6 can be attached to the luminaire base support 10 via a transparent, essentially sleeve-shaped housing part 9, which can be injection-molded from transparent plastic or made from glass, for example. Said housing part 9 can in particular form a cylindrical or slightly conical sleeve with a straight wall profile when viewed in cross section and be attached on the one hand to an edge of the lamp base support 10 and on the other hand to an outer edge of the reflector 6, for example by means of a form-fitting connection such as a snap-in connection or a Screw connection, or non-positive and / or material fit by gluing or in some other way.

Advantageously, the housing part 9 adjoins the luminaire base support 10 and the reflector 6 in a dust-tight manner, so that entry of dust or dirt into the luminaire interior 14 from the side is prevented.

As the Figures 3-5 show, a secondary lens 8 is advantageously used in the mentioned recess 7 of the reflector 6, which advantageously the entire recess 7 can close. As a result, a luminaire housing is formed jointly by the mentioned secondary lens 8, the reflector 6 and the transparent housing part 9, which surrounds the primary lens 3 and reliably prevents dirt and dust from entering the interior of the luminaire. In particular, dust and dirt are kept away from the surface of the primary lens 3, the reflector surface of the reflector 6 and the light entry surface of the secondary lens 8, so that a permanently efficient light emission can be achieved.

Advantageously, the named secondary lens 8 can be releasably attached to the reflector 6 by releasable connecting means, for example a positive connection of the secondary lens 8 to the reflector 6, for example in the form of a snap connection. The secondary lens 8 can, for example, also have a collar which covers the edge of the recess 7, so that the secondary lens 8 can be placed from above into the reflector without slipping through. Other connecting means are also possible.

Said secondary lens 8 captures the part of the light bundle or cone 4 of the primary lens 3 which passes through the recess 7 and reshapes it in the desired manner.

As the Figures 3-5 show, said secondary lens 8 can work as a widening divergent lens which further widens the beam angle of the captured part of the light cone 4, for example to illuminate a larger object under the lamp 1 such as a carpet or the like, cf. Fig. 3 . Alternatively, however, a constricting converging lens can also be provided as the secondary lens 8, which tapers or further narrows the beam angle of the captured light cone part in order to brilliantly illuminate an object located under the lamp 1, such as a showcase, in a spot-like manner, cf. Fig. 5 .

So to speak, between a design as a widening divergent lens and a design as a constricting converging lens, the secondary lens 8 can also have a medium emission characteristic that neither expands nor narrows the captured part of the light cone 4 or only widens or narrows it slightly.

Independently of the widening, narrowing or mean radiation characteristic of the secondary lens 8, this can also be used to change the radiation direction, for example by the direction shown in FIG Fig. 3 The main direction of radiation 5 going vertically downwards can be tilted slightly to the left or right in order to be able to illuminate an object which is not arranged directly under the lamp but is offset transversely thereto.

The releasably attached to the reflector 6 secondary lenses 8 according to Figures 3-5 advantageously form a set of interchangeable lenses from which a suitable lens for the lighting task can be selected and inserted into the reflector 6. Advantageously, all copies of the interchangeable lens set have mutually corresponding connection dimensions and connection contours so that they can be inserted alternately into the same recess in the reflector 6. With such an interchangeable lens set, the emission characteristics can be varied significantly while the external optics of the lamp 1 remain the same.

If the part of the light cone 4 that actually passes through the recess 7 in the reflector 6 is to be completely dimmed or reduced in size, instead of the mentioned secondary lenses 8, an opaque insert cover or insert ring can also be inserted into the recess 7, for example Wall mounting can be helpful in which the main radiation direction 5 is aligned horizontally.

As Fig. 6 shows, is through the reflector 6 and the secondary lens 8, the light cone 4 emitted by the primary lens 3 on the one hand in a ceiling or wall-flooding emission area 12 and on the other hand in a cone or split up bundle-shaped emission area 15, the last-mentioned emission area 15 having a circular, but also oval, elliptical or polygonal contour in cross section. Said radiation area 15 can be changed by the choice of secondary lens 8 and, for example, have a widening angle of 2 x 0 ° to 2 x 60 ° or 2 x 10 ° to 2 x 50 ° or 2 x 20 ° to 2 x 40 °, depending depending on which lighting task has to be fulfilled. Between the two emission areas 12 and 15, the reflector 6 and the secondary lens 8 mask an annular wedge area 13, which advantageously extends in a range of at least 60 ° to 80 ° or 50 ° to 85 ° or 45 ° to 90 ° to the main emission direction 5 can to prevent glare from people looking obliquely into the lamp 1.

As Fig. 7 shows, the reflector 6 can be provided with a faceting on its reflector surface, which can comprise several hundred facets, for example. In particular, facets can be arranged in three or more than five or even more than ten rings around the recess 7 with more than 10 facets per ring. As an alternative or in addition, essentially the entire reflector surface which is active in terms of lighting technology can be faceted.

As the Figures 8-10 show, the secondary lens 8 can advantageously be essentially - roughly speaking - plate-shaped or disk-shaped in order to achieve an overall compact, flat design of the lamp 1, the surfaces of the plate-shaped or disk-shaped secondary lens 8 depending on the design as a converging lens or a diffusing lens can be concave and / or convex.

As the Figures 9 and 10 show, the secondary lens 8 can also be provided with a faceting on its light entry surface and / or on its light exit surface, with a multiplicity of, for example, more than 100 facets also being able to be provided here. For example, multiple rings of facets, for example more than three or more than five or more than ten rings of facets each having more than five or more than ten facets per ring.

By faceting the secondary lens 8 and / or the reflector 6, an overall homogeneous, mixed radiation can be achieved.

Claims (14)

1. Luminaire, comprising a light source (2), a primary lens (3) for capturing the light emitted by the light source (2) and emitting a light cone (4) having a main emission direction (5), and an annular reflector (6) having a central recess (7) that deflects an outer part of the light cone (4) obliquely to the main emission direction (5) and allows an inner part of the light cone (4) to pass through the recess (7), wherein the primary lens (3) is designed to form all the light of the light source (2) into an acute-angled emission cone, characterised in that the reflector (6) is arranged so as to be spaced apart from said primary lens (3) and retained by a sleeve-like, transparent housing part (9) that surrounds the reflector (6) and the primary lens (3), and in that a secondary lens (8) is inserted into the recess (7) of the reflector (6) and is designed for widening, narrowing and/or shaping the non-reflected inner part of the light cone (4) of the primary lens (3).
2. Luminaire according to the preceding claim, wherein a set of interchangeable secondary lenses (8) which comprise at least one converging lens and at least one diffuser lens and have mutually corresponding outside fitting dimensions and/or contouring for reciprocal insertion into the recess (7) of the reflector (6).
3. Luminaire according to the preceding claim, wherein the interchangeable secondary lenses (8) having different emission characteristics can be inserted into the recess (7) of the reflector (6), in exchange for one another, in each case from a front side of the luminaire, towards which the non-reflected inner part of the light cone (4) is emitted through the recess (7) of the reflector (6), without the reflector (6) being dismantled from the sleeve-like housing part (9), wherein the recess (7) and the secondary lenses (8) are preferably contoured, at the edge, such that the secondary lenses (8) can be set into the recess (7) from the front side, in the direction of the main emission direction (5).
4. Luminaire according to any of the preceding claims, wherein the secondary lens (8) is detachably fastened directly to the reflector (6) and completely closes the recess (7), wherein mutually compatible, detachable connection means are provided on the edge of the secondary lens (8) and on the edge of the recess (7).
5. Luminaire according to the preceding claim, wherein said connection means comprise a form-fitting snap connection.
6. Luminaire according to any of the preceding claims, wherein the sleeve-like, transparent housing part (9) that connects the reflector (6) to a luminaire base support (10) on which the light source (2) and/or the primary lens (3) are fastened, forms, together with the reflector (6) and the secondary lens (8), a closed luminaire housing that encloses the primary lens (3).
7. Luminaire according to the preceding claim, wherein the sleeve-like transparent housing part (9) retains an outside edge of the reflector (6) and connects said outside edge of the reflector (6) to an outside edge of the luminaire base support (10).
8. Luminaire according to either of the two preceding claims, wherein the annular transparent housing part (9) is cylindrically or conically contoured and, viewed in cross section, forms a straight peripheral wall.
9. Luminaire according to either claim 6 or claim 7, wherein, when viewed in cross section, the annular transparent housing part (9) is contoured so as to be concavely or convexly curved.
10. Luminaire according to any of the preceding claims, wherein the secondary lens (8) is designed so as to be approximately plate-shaped.
11. Luminaire according to any of the preceding claims, wherein the secondary lens (8) is provided with faceting.
12. Luminaire according to any of the preceding claims, wherein the reflector (6) is designed to emit the captured light of the light cone (4) in an annular wedge region (12) of from 85° to 120°, or 90° to 115°, or 95° to 110° relative to the main emission direction (5) of the light cone (4) of the primary lens (3).
13. Luminaire according to any of the preceding claims, wherein the reflector (6) is provided with faceting.
14. Luminaire according to any of the preceding claims, wherein the reflector (6) and the secondary lens (8) fade out a wedge-shaped annular region (13) around the main emission direction (5) which extends in an angular range of from 30° to 90°, or 40° to 90°, or 50° to 85° with respect to the main emission direction (5).

Images