EP3165818A1 - Internal or outdoor luminaire, in particular a street lamp, with adjustable free-form lens - Google Patents

Abstract

The invention relates to a lamp for indoor or outdoor lighting, in particular street lamp, with at least one LED as the light source and; at least one free-form lens associated with the LED for influencing the light distribution emitted by the luminaire, and wherein the freeform lens is not rotationally symmetrical, wherein the freeform lens and the LED are displaceable relative to one another by at least a first and a second position and wherein the relative movement at least partially comprises a movement comprises perpendicular to the main emission of the LED and the free-form lens in the first and the second position generates different light distributions.

Description

The invention relates to a luminaire for stationary indoor or outdoor lighting, in particular a street lamp, with at least one LED (light emitting diode, including an OLED, organic light emitting diode, is to be understood) and a free-form lens, which is associated with the LED.

For lighting in the interior and exterior, especially for street lights, LEDs are increasingly being used as lamps because of the advantages in terms of energy savings and longevity. The near-point light sources require a modified compared to conventional bulbs optical device to achieve a desired light distribution of the lamp for the given application.

As with traditional lighting, LEDs also use a reflector technique. Here, the point-shaped light images of the LEDs, which can be arranged in combined arrays, distributed on a surface of the reflector. This can also reduce the glare. A disadvantage of this reflector technique, however, is that when individual LEDs fail, a change in the light distribution curve can result and thus a deterioration of the illumination uniformity and the illumination level occurs.

Another possibility of light control is the spatial distribution of the LEDs on curved surfaces. However, even here the failure of individual LEDs has a change in the desired light distribution result. Furthermore, the support elements of the LEDs must be adapted to the spatial distribution of the LEDs.

The use of light-directing lenses on individual or multiple LEDs forms another possibility of generating a defined light distribution on a use plane, such as on one of the road. Here, individual LEDs on a LED carrier lenses are assigned. If several LEDs with associated lenses have the same spatial arrangement, the failure of individual LEDs has only a very small influence on the produced light distribution.

However, the lens solution is relatively expensive because the lenses need to be made specifically for the lighting task. For different lighting tasks, i. To achieve the different light distributions, free-form lenses must be developed individually. Furthermore, the respective lamp is only suitable for a specific lighting task.

Another way to change the light distribution of a luminaire is to move an auxiliary lens parallel to the optical axis of the lamp to focus or defocus a rotationally symmetric light distribution. As a result, however, few variations of light distributions can be generated. In the US 2008/0273324 A1 It is proposed to laterally rotate a matrix of respectively circular-symmetrical lenses relative to a matrix of LEDs. As a result, an oval-shaped light distribution can be generated from a circular light distribution of the luminaire. However, in this example too, the possibilities of influencing the light distribution by displacing the lens are very limited.

Object of the present invention is to develop a luminaire for fixed illumination of indoor or outdoor areas, in particular a street lamp, which can be inexpensively adapted to the respective lighting task.

The object is achieved by a lamp for indoor or outdoor lighting, in particular a street lamp, according to claim 1.

According to the invention, at least one free-form lens, ie with a non-rotationally symmetrical profile, and the LED are displaceable relative to one another. For this purpose, either the lens relative to the LED can be moved, the LED is mounted stationary on the lamp. Alternatively, the LED can be moved relative to a stationary lens mounted in the luminaire. The displaceability makes it possible to arrange the lens and the LED in at least two different positions relative to one another, wherein the displacement between the two positions comprises at least one movement perpendicular to the main emission direction of the lens. In combination with the use of a freeform lens, the light distribution of the Change lamp much more flexible than, for example, by a displacement of a lens along the optical axis of the LED is possible. In particular, the free-form lens generates different light distributions in the at least two or more different positions which, for example, are adapted to the illumination requirement of a street lamp, as explained in more detail below. Of particular advantage is the relative to the LED lateral displacement of a non-rotationally symmetrical freeform lens. Due to the deviation from the rotational symmetry, the light distribution of the lens is already adapted to a lighting task and by moving the lens, the light distribution can be changed more. In particular, it is also possible to produce light distributions which deviate from a simple axis symmetry perpendicular to the direction of displacement of the lens, because the angle of incidence between the light radiation of the LED and the incident and failure surfaces of the freeform lens is increased by the lateral displacement of the non-rotationally symmetrical lens to let. In a rotationally symmetrical lens, as usual in the prior art, only a minimal distortion of the light distribution, for example from circular to oval, can be achieved.

According to a preferred embodiment, the light distribution in the first and second positions at a predetermined beam angle around the lamp, ie in a so-called cone envelope curve, a longitudinal extent. For example, two distinct maxima may be generated arranged on a common axis, eg along a road illuminated by the luminaire (ie in the directions of the C0 / 180 plane). Such a light distribution is suitable for illuminating a street with several lights, the longitudinal distribution helps to be able to choose the mast spacing for the street lights relatively large. The maxima may be symmetrical to the C90 / C270 plane, which is transverse to the road axis. The angle between the C0 / C180 plane, in which the road axis runs, and the two pronounced maxima forms a so-called Lichtbandknickung. This Lichtbandknickung is preferred to illuminate a street with a lamp from the roadside or an adjacent walking and / or track over a longitudinal section as evenly as possible. In order to produce this light band buckling, the lens must redirect much of the light from the light source at the angle of the light band buckling. This can be realized, for example, according to an embodiment with a convex geometry in an inner cavity of the free-form lens or with a convex geometry on the outer surface of the lens. A similar effect can also be achieved by a prism structure on the inner cavity and / or the outer surface can be achieved to focus light in the desired direction or by refractive index differences within the lens to produce a refraction of light in the corresponding desired direction. It is also possible to provide a plurality of cavities with or without prism structure in a lens. For example, each of the cavities may be associated with one of the LEDs. It is also possible to arrange a plurality of LEDs within a cavity.

According to a preferred embodiment, the angle of the light band buckling between the two positions is changed by the displacement of the lens. In particular, it is also possible to adjust the angle of the light band buckling continuously with the relative movement between the two positions. This allows an individual adaptation of the lamp to the spatial conditions of the streets and to the selected mast spacing of the street lights. This allows a pre-configured luminaire type to be used in different spatial situations.

According to one embodiment, the free-form lens has a plane of symmetry in a C plane, preferably the C90 / C270 plane, and the relative movement takes place along a direction in the plane of symmetry. This embodiment is particularly suitable for illuminating straight roads. However, if the road has a nonuniform curve in the track section to be illuminated or has a large pitch in the longitudinal direction, a deviation from the mirror symmetry in the C90 / C260 plane may also be advantageous in order to achieve a uniform illumination on the road section. The displaceability of the lens thereby allows an individual adaptation to the location of the luminaire, e.g. the distance to the roadside and the height of the lamp post.

According to a preferred embodiment, the lamp has a plurality of LEDs and each LED is associated with a free-form lens. This not only serves to produce a larger illuminance, but also has the advantage that the LEDs can act redundantly, so that in case of failure of an LED lighting task is only guaranteed with reduced overall intensity.

According to a preferred embodiment, the freeform lenses are displaceable relative to the LEDs by a common relative movement. As a result, all lenses can be adjusted to produce the desired light distribution with one movement. According to an alternative embodiment may also be provided that the individual free-form lenses are individually displaced relative to the respective associated LED. As a result, different light distributions can be generated with the individual lens-LED pairs, which overlap to a desired overall light distribution of the luminaire.

In particular, several or all of the freeform lenses can be shaped identically, so that with the relative movement, all the lenses also produce the same light distribution in each case.

According to a preferred embodiment, the several same freeform lenses are each arranged in the same position relative to the LEDs assigned to them. As a result, all the lens-LED pairs in the luminaire each achieve the same light distribution, which overlap each other with the same spatial orientation. If one LED fails, this does not change the total light distribution generated by the luminaire. According to an alternative embodiment, some free-form lenses along an axis, in particular in the direction of the relative movement, offset from their respective associated LEDs can be arranged. According to this embodiment, the individual lens-LED pairs can have different light distributions, e.g. produce different Lichtbandknickungen, which overlap in the total light distribution of the luminaire. So new light distribution curves can be generated. By moving the lenses relative to the LEDs, this light distribution can also be adjusted individually.

In the embodiments with a plurality of LEDs and freeform lenses, each of the freeform lenses can each generate a light band buckling at the same angle. However, it is also possible for the freeform lenses of different LEDs to produce different light band bends. Either the lenses are arranged differently with respect to the LEDs or the lenses have a different shape to produce a changed angle of the light band buckling.

According to a preferred embodiment with a plurality of free-form lenses and LEDs, the plurality of LEDs are arranged in a plane or arranged along a straight axis and the lenses are arranged to be displaceable in an array parallel to the plane or parallel to the axis. In this embodiment, the light distributions of the individual lens-LED pairs are uniformly superimposed in the at least two different positions, so that the symmetry of the overall light distribution achieved when adjusting the lenses the LEDs remains. By adjusting the lenses relative to the LEDs, for example, the distance between two maxima in the light distribution curve in the cone envelope curve can be set or the angle of the light band buckling can be changed.

According to a preferred embodiment, a plurality of free-form lenses are arranged on a common lens carrier and the lens carrier can be displaced by the relative movement with respect to the LEDs. In this way, the embodiment with a plurality of LEDs and a plurality of freeform lenses can be produced particularly easily. Furthermore, the operation for adjusting the lamp is easy, because only one lens carrier has to be moved relative to the LEDs. According to an alternative embodiment, however, it is also provided that individually individual free-form lenses or groups of free-form lenses can be adjusted relative to the respectively assigned LED (s).

The lens carrier can be manufactured together with the freeform lens or as a separate component. For example, the freeform lenses can be formed from a transparent plastic such as PMMA. The lens carrier may be made of the same plastic material or another, e.g. non-transparent, plastic material may be formed, and made with the lenses in one piece or separately.

According to a preferred embodiment, a lens carrier has a single free-form lens or a lens carrier for a plurality of free-form lenses at least one, preferably two opposing reflective side walls facing towards the one or more LEDs. Generally, the reflective sidewall increases the efficiency of the luminaire. Preferably, on two opposite sides reflective side walls, each facing in the direction of the LED or (s) arranged. According to a development of this embodiment, the at least one or preferably the two side walls are / are arranged parallel to a plane of symmetry of the light distribution which generates the luminaire in one or both positions of the free-form lens (s) relative to the LED (s). In the case of symmetrical light distribution, this arrangement of the side walls has no influence on the light distribution curve. But it can be dispensed with large beam angle to the side and thus on large designs of the lamp, because the light is mirrored without affecting the light distribution over the side wall.

The displaceability of the lenses relative to the LED can be done manually or automatically. Due to the manual displaceability, the desired light distribution at the place of installation of the lamp can still be adjusted. In an automatic displacement such as an electric servomotor or the like, the light distribution of the lamp can still be changed after installation. For example, the light can have different light distributions at daytime and at night, or the light distribution can be adapted to the weather situation and the reflection or absorption properties of the road surface. Furthermore, it can also be provided that the luminaire interacts with a transmitter in a vehicle, so that the light distribution in an approaching vehicle is automatically changed in order, for example, to change the light distribution. to prevent dazzling the driver by the street lamp.

Figur 1

zeigt einen Querschnitt in der C90/270-Ebene einer verschiebbaren Freiformlinse auf einem PCB mit einer LED.

Figur 2a

zeigt einen Schnitt senkrecht zu den C-Ebenen (d.h. in einem Schnitt parallel zur Fläche, auf der die LED befestigt ist) der Anordnung nach Figur 1.

Figur 2b

zeigt eine Kegelmantelkurve einer Lichtverteilung der Anordnung nach Figur 2a.

Figur 3a

zeigt den Schnitt nach Figur 2a mit verschobener Linse.

Figur 3b

zeigt eine Kegelmantelkurve einer Lichtverteilung der Anordnung nach Figur 3a.

Figur 4a

zeigt einen Schnitt senkrecht zu den C-Ebenen (d.h. einem Schnitt parallel zur Fläche, auf die LED montiert sind) durch eine Anordnung mit drei Freiformlinsen.

Figur 4b

zeigt Kegelmantelkurven von Lichtverteilungen der Anordnung nach Figur 4a.

Figur 5

zeigt eine verschiebbare einzelne Freiformlinse auf einem Träger in perspektivischer Ansicht.

Figur 6

zeigt eine einzelne Freiformlinse in perspektivischer Ansicht.

Figur 7

zeigt einen Linsenträger für vier einzelne Freiformlinsen nach Figur 6 in perspektivischer Ansicht.

Figur 8

zeigt ein verschiebbares 1x2-Linsenarray in perspektivischer Ansicht.

Figur 9

zeigt einen Linsenträger für zwei Linsenarrays nach Figur 8 in perspektivischer Ansicht.

Figur 10

zeigt einen Linsenträger für ein XxX-Linsenarray in perspektivischer Ansicht.

Figur 11

zeigt einen Linsenträger mit reflektierenden Seitenwänden in perspektivischer Ansicht.

Figur 12

zeigt einen Schnitt durch eine Freiformlinse einer alternativen Ausführungsform, wobei der Schnitt in einer Fläche parallel zu der Fläche liegt, auf der die LED angeordnet ist.

Figur 13

zeigt einen Schnitt entsprechend der Figur 12 durch eine weitere Ausführungsform einer Freiformlinse.

Figur 14

zeigt einen Schnitt entsprechend der Figur 12 durch eine weitere Ausführungsform einer Freiformlinse.

Other features and advantages of the present invention will be apparent from the following description of preferred embodiments, taken in conjunction with the accompanying drawings. The figures show the following:

FIG. 1

shows a cross section in the C90 / 270 plane of a sliding free-form lens on a PCB with an LED.

FIG. 2a

Figure 12 shows a section perpendicular to the C-planes (ie in a section parallel to the surface on which the LED is mounted) of the assembly FIG. 1 ,

FIG. 2b

shows a cone-shaped curve of a light distribution of the arrangement FIG. 2a ,

FIG. 3a

shows the cut after FIG. 2a with shifted lens.

FIG. 3b

shows a cone-shaped curve of a light distribution of the arrangement FIG. 3a ,

FIG. 4a

shows a section perpendicular to the C-planes (ie a section parallel to the surface on which LEDs are mounted) by an arrangement with three free-form lenses.

FIG. 4b

shows cone-shaped curves of light distributions of the arrangement FIG. 4a ,

FIG. 5

shows a sliding single free-form lens on a support in perspective view.

FIG. 6

shows a single freeform lens in perspective view.

FIG. 7

shows a lens carrier for four individual freeform lenses FIG. 6 in perspective view.

FIG. 8

shows a sliding 1x2 lens array in perspective view.

FIG. 9

shows a lens carrier for two lens arrays FIG. 8 in perspective view.

FIG. 10

shows a lens carrier for a XxX lens array in perspective view.

FIG. 11

shows a lens carrier with reflective side walls in perspective view.

FIG. 12

shows a section through a freeform lens of an alternative embodiment, wherein the cut is in a plane parallel to the surface on which the LED is arranged.

FIG. 13

shows a section corresponding to the FIG. 12 by a further embodiment of a freeform lens.

FIG. 14

shows a section corresponding to the FIG. 12 by a further embodiment of a freeform lens.

Referring to the Figures 1 to 3b An embodiment of a luminaire designed as a street lamp will be described. An LED 1 is arranged on a carrier, in particular a PCB (prited circuit board) 5 and fixedly mounted in a lamp housing (not shown). Above the LED is a free-form lens 2 made of glass or one transparent plastic such as PMMA, PU or silicone arranged. The LED 1 is arranged within a cavity 10 of the freeform lens 2. The cavity 10 has, as in the FIGS. 2a and 3a it can be seen a convex geometry, which causes light of the LED 1, as indicated by the light beams L1, L2 and L3, broken. The free-form lens 2 is mounted with respect to the PCB 5 with the lens 1 slidably. The direction 4 of the sliding movement lies in a C90 / 270 plane of the luminaire.

By moving the freeform lens 2 relative to the LED 1 different light distributions are produced. The illustrated embodiment is provided in particular for generating a light distribution for a street lighting. The convex geometry 9 of the inner cavity 10 provides a light distribution curve, which produces two pronounced maxima in a horizontal section of the C-planes, the so-called cone-shaped curve. The maxima are symmetrical with respect to the C90 / 270 plane and arranged at an angle 11 with respect to the C0 / 180 plane in order to form a light band buckling. In the configuration after FIGS. 2a and 2b the angle of Lichtbandknickung 11 is only about 5 °. This configuration is suitable for illuminating a relatively narrow street, as in FIG. 2b indicated. The light band buckling makes it possible to position the light 8 at the side of the road and to illuminate the road relatively evenly over a large longitudinal section. By moving the lens in one direction in the C90 / 270 plane, ie in a direction perpendicular to the main emission direction of the LED, the angle 11 of the light band buckling changes. As in FIG. 3b can be seen, is at the shifted lens 2, the angle 11 of the light band buckling about 30 °. This configuration is particularly suitable for illuminating a wider street, as in FIG. 3b is shown.

Accordingly, the same light 8 by shifting the free-form lens 2 relative to the LED 1 along the direction 4, ie in the C90 / 270-level, generate different light distributions with a modified Lichtbandknickung 11 and thus adapted for lighting different widths of roads. Depending on the displacement so all arrangements can be illuminated in accordance with standards between very narrow and very wide streets. Furthermore, different overhangs of the luminaire with respect to the roadside in positive or negative direction can be compensated by the displacement of the lens 2. The light distribution curve can also be adapted to curvy roads with the angle of the light band bend.

The FIG. 4 shows a further possibility for generating a desired light distribution through different lens positions 19, 20, 21 of three LEDs 1 within a light 8. The free-form lenses 2 in this embodiment are each identical to the previously described free-form lens 2. Inside the light 8, however, are three LEDs 1 and the three free-form lenses 2 are arranged in three different positions along the displacement direction x in the C90 / 270 plane with respect to their respectively associated LED 2. Due to the three different positions 19, 20 and 21 result in three different cone envelope curves 22, 23 and 24, which in the FIG. 4b are shown. These light distributions are superimposed to form an overall cone envelope curve 25. In this embodiment, the free-form lenses 2 can be moved individually relative to the LEDs. Through the use of individual displaceable free-form lenses 2 in the luminaire 8, a superimposition of the light distribution with different light band buckling can be generated by different displacement paths of the lenses and thus new light distribution curves are generated. A field of application is, for example, the lighting of squares. Due to the superimposition of the light band bends at different lens positions in the luminaire 8, there is no longer any special angle in the light band bending of the light distribution curve 25. The total light distribution 25 is suitable in addition to wide streets for the illumination of places or areas that have a greater depth in the direction of the C90 / 270 level.

FIG. 5 shows a structure of a sliding free-form lens 2 on a PCB 5 according to a possible embodiment. The free-form lens 2 is held by a lens carrier 12 which is fixedly connected to the PCB 5, above the LED 1. The lens 2 is slidably disposed within the lens carrier 12, so that the lens 2 along the direction 4 above the LED (in FIG. 5 hidden) can be moved continuously. Via a groove structure 13, which is connected to the free-form lens 2, and an opposing groove structure on the lens holder 12 (hidden in the figure), the lens 2 can be held in different displacement positions. A mark 14 on the lens carrier 12 and an opposite mark on the lens 2, the position of the lens relative to the LED 1 can be read. Each position of the lens 2 corresponds to a predefined light distribution, which defines an angle in a light band buckling in the example. The lens 2 can be manually displaced in the direction 4 against the resistance which the groove structure 13 exerts on the lens. According to an alternative, however, it may be provided in these and also in the other embodiments that the lens 2 is fully automatically displaceable by a sensor control (eg with an electric motor).

Furthermore, in the FIGS. 7 and 9 a lens carrier 16 is shown which can accommodate a plurality of lenses. The lens wearer 16 after FIG. 7 is adapted to a plurality of individual lenses 15 according to FIG. 6 each slidably received, as previously in connection with FIG. 5 has been explained for a single lens 15. Alternatively, however, it can also be provided to mount each of the individual lenses 15 firmly on the carrier 16 and to move the entire carrier 16 relative to the LEDs 1. In such a construction, with a displacement movement of the carrier 16 relative to the LEDs 1, all the individual lenses 15 can be adjusted uniformly with respect to the LEDs.

In the FIGS. 8 and 9 an embodiment is shown, in which the free-form lens are combined in an array of 1x2 lenses. Two of the lens arrays 15 according to FIG. 8 are in the lens carrier 16 according to FIG. 9 inserted in the space provided 17 and can be moved together via two LEDs 1. In this embodiment, the two free-form lenses 2 of the lens array 15, which are each aligned identically to the associated LED 1, produce the same light distribution, so that these light distributions overlap identically with negligible offset. In the case of a failure of an LED, this does not change the overall light distribution of the light generated by the lens array, but only decreases in the overall intensity.

In the FIG. 10 For example, a lens carrier for an XxX lens array (not shown in the figure) is shown. In the space 17 of the lens carrier, an array of any number of matrix-shaped free-form lenses 2 can be arranged and moved in two directions in a plane above the LEDs.

FIG. 11 shows a lens carrier 16 for four individual freeform lenses. In this embodiment, further side walls are provided which are reflective on the side facing the LEDs 18, in particular highly reflective executed. The reflective sidewalls 18 are disposed parallel to the C90 / 270 plane and parallel to the plane of translation of the lenses. At a light distribution symmetrical with respect to the C90 / 270 plane, the sidewalls have no influence on the light distribution because the reflection planes are parallel to the plane of symmetry. Due to the reflective side walls, however, the design of the lamp can be made smaller, because it can be dispensed with high radiation angle to the side.

Other embodiments of free-form lenses that can be used in the present invention are disclosed in U.S. Patent Nos. 4,135,355 and 4,305,837 FIGS. 12, 13 and 14 shown. In the embodiments in FIGS. 12 and 13 a prism structure 26 is provided on the freeform lens 2. This prism structure can be provided both on the light entry surface, ie within the cavity 10, as in FIG FIG. 12 shown. Alternatively, it may also be provided as in FIG. 13 illustrated to provide a prism structure 26 on the outside of the freeform lens 2. The prism structure provides for a focusing arrangement, for example in the manner of a Fresnell structure, in particular to produce a Lichtbandknickung the light distribution. It is of particular advantage that the angle of incidence of the light rays on the prism surfaces change considerably as a result of the displacement of the lens, so that the displacement of the lens in conjunction with the prismatic structures makes it possible to influence the light distribution of the luminaire very strongly. In the FIG. 14 a further embodiment of a free-form lens is shown, which can also generate a Lichtbandknickung. In this free-form lens, a region 27 is provided within the lens, which has a different refractive index than the surrounding region. For example, the region 27 may be formed by a further cavity, ie with a refractive index n = 1. But it is also possible to fill a region 27 with a transparent material having a different refractive index to the surrounding material, for example with a stronger or weaker refractive glass or plastic material.

Further modifications of the previously described embodiments are possible within the scope of the invention, which is defined by the appended claims. In particular, the foregoing embodiments have been described as always moving the lens relative to the LEDs. However, it may also be possible to mount the lenses stationary on the lamp and to move the LEDs relative to the lenses by appropriate means. Furthermore, it is possible to provide any combinations of individual lenses and lens array within a lens carrier or on a plurality of lens carriers within a luminaire, eg, more than 10 or 50 LEDs can be predetermined. Furthermore, a plurality of LEDs may each be associated with a lens. In general, the lens carriers can be adjustable relative to the light in order to move the lenses relative to the LEDs. However, it is also possible to displace the lens within the lens carrier in order to achieve the relative movement with respect to the LED.

LIST OF REFERENCE NUMBERS

1

LED

2

Freeform lens

3

road to

4

Displacement direction of the freeform lens

5

PCB

6

Cone curve with light band bending

7

Road (narrow width)

8th

street lamp

9

convex geometry in the inner cavity

10

Linsenkavität

11

Angle of light band bending

12

lens wearers

13

groove structure

14

mark

15

Single lens or lens array

16

Array lens wearers

17

Space for lenses / lens arrays

18

Reflective sidewall

19

lens position

20

lens position

21

lens position

22

Light band buckling of the single lens in the luminaire at lens position 21

23

Light band buckling of the single lens in the luminaire at lens position 20

24

Light band buckling of the single lens in the luminaire at lens position 19

25

Resulting LVK due to the overlapping of the light band bends 22, 23 and 24

26

prismatic structures

27

Cavity or area with different refractive index

L1

beam of light

L2

beam of light

L3

beam of light

Claims (15)

Luminaire for indoor or outdoor lighting, in particular street lamp (8), with at least one LED (1) as the light source and;
at least one of the LED (1) associated freeform lens (2) for influencing the light output from the light distribution, and wherein the freeform lens (2) is not rotationally symmetrical
wherein the free-form lens (2) and the LED (1) by a relative movement (4) against each other are displaceable between at least a first and a second position and wherein the relative movement (4) at least partially comprises a movement perpendicular to the main emission of the LED (1) and the freeform lens (2) generates different light distributions in the first and the second position. Luminaire according to claim 1, wherein the light distribution in a cone-shaped curve (6; 22, 23, 24) has a longitudinal extent when the free-form lens (2) is in the first and the second position in relation to the LED. Luminaire according to claim 1 or 2, wherein the free-form lens (2) has an inner cavity (10) with a convex geometry (9) and / or an outer surface with convex geometry and / or the inner cavity and / or the outer surface has a prism structure. Luminaire according to one of the preceding claims, wherein in at least one of the positions the light distribution in the cone envelope curve (6; 22, 23, 24) has a light band bending. Luminaire according to claim 4, wherein the angle (11) of the Lichtbandknickung between the two positions is different and, in particular, with the relative movement (4) between the two positions is continuously adjustable. Luminaire according to one of the preceding claims, wherein the free-form lens (2) has a plane of symmetry and the relative movement (4) takes place along a direction in the plane of symmetry. Luminaire according to one of the preceding claims, wherein the luminaire has a plurality of LEDs (1) and each LED (1) is associated with a freeform lens (2). Luminaire according to claim 7, wherein all free-form lenses (2) relative to the LEDs (1) by a common relative movement (4) are displaceable. Luminaire according to claim 7 or 8, wherein several or all of the free-form lenses (2) are shaped equal. Luminaire according to claim 9, wherein the plurality of same freeform lenses (2) with respect to their respectively associated LED (1) are arranged the same or along only one axis, in particular in the direction of relative movement (4), offset from the respective LED are arranged. Luminaire according to one of claims 7 to 10, wherein the free-form lenses each generate a light distribution with Lichtbandknickung (22, 23, 24) at the same or different angles (11) in at least one of the two positions. Luminaire according to one of claims 7 to 11, wherein the plurality of LEDs (1) are arranged in a plane or arranged along a straight axis, and the lenses are mounted in an array (15) parallel to the plane or parallel to the axis displaceable , Luminaire according to one of claims 7 to 12, wherein the plurality of free-form lenses (2) on a common lens carrier (16) are arranged and the free-form lenses within the lens carrier (16) or the lens carrier in total by the relative movement (4) relative to the LEDs (1). is relocatable. Luminaire according to one of the preceding claims, wherein a lens carrier (16) of a single freeform lens (2) or with reference to claim 11 of the common Lens carrier (16) of the plurality of free-form lenses (2) has at least one reflective side wall (18) facing towards the one or more LEDs (1), in particular the side wall (18) being arranged parallel to a plane of symmetry of the light distribution, which generates the luminaire in one or both of the positions. Luminaire according to one of the preceding claims, wherein the relative movement (4) is manually executable or can be executed by an automatic drive.

Images