Optical element and luminaire equipped therewith

Abstract

An optical element (1) for influencing light emitted by light sources (7) has at least one pair of optical system elements (10) which are arranged next to one another and integrally formed with one another. A light entrance region (4) and a deflecting surface portion (5) are formed on the back side (2) of each optical system element (10). Each optical system element (10) is designed so that first light rays (L1) from an assigned light source (7) are directly incident on the deflecting surface portion (5) and undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6). Each optical system element (10) is also designed so that second light rays (L2) of the light from the assigned light source (7 are directly incident on the front-side surface portion (6), undergo total-internal reflection at the front-side surface portion (6), subsequently are incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6).

Claims

1. An optical element (1) for influencing light emitted by light sources (7), the optical element (1) comprising: a back side (2) facing the light sources (7); and a front side (3) facing away from the light source (7); wherein the optical element (1) has at least one pair of optical system elements (10) which are arranged offset next to one another laterally along an offset axis (V) and are integrally formed with one another, which are each optically assignable to a different one of the light sources (7), and which together form the back side (2) and together form the front side (3); wherein a light entrance region (4) for light from the assigned light source (7) entering the respective optical system element (10) is formed on the back side (2) of each optical system element (10), and a deflecting surface portion (5) is formed on the back side (2) of each optical system element (10); wherein a front-side surface portion (6) is formed on the front side (3) of each optical system element (10); wherein each optical system element (10) is designed so that first light rays (L1) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6), and second light rays (L2) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the front-side surface portion (6), undergo total-internal reflection at the front-side surface portion (6), subsequently are incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6); and wherein the front-side surface portion (6) has at least a first outcoupling portion (61) via which the first light rays (L1) leave the optical element (1), the front-side surface portion (6) has at least a second outcoupling portion (62) via which the second light rays (L2) leave the optical element (1); and all second outcoupling portions (62) extend in one plane (E) which is aligned parallel to the offset axis (V).

2. The optical element (1) according to claim 1, wherein the optical system elements (10) of the pair of optical system elements (10) are arranged offset next to one another laterally along the offset axis (V) with respect to a vertical axis (H) of the optical element (1), wherein the vertical axis (H) is aligned parallel to a main emission direction (R) of the light sources (7).

3. The optical element (1) according to claim 1, wherein the optical system elements (10) are each designed so that the first light rays (L1) and/or the second light rays (L2), after having undergone total-internal reflection at the deflecting surface portion (5), subsequently leave the optical element (1) directly via the front-side surface portion (6).

4. The optical element (1) according to claim 1, wherein the deflecting surface portion (5) has at least a first deflection portion (51) which serves for total-internal reflection of the first light rays (L1), and/or wherein the deflecting surface portion (5) has at least a second deflection portion (52) which serves for total-internal reflection of the second light rays (L2).

5. The optical element (1) according to claim 4, wherein the first deflection portion (51) and the second deflection portion (52) are provided as structurally separate units, and/or wherein the first deflection portion (51) is closer to the light entrance region (4) than is the second deflection portion (52).

6. The optical element (1) according to claim 1, wherein the front-side surface portion (6) has an optical portion (60) which serves for total-internal reflection of the second light rays (L2).

7. The optical element (1) according to claim 1, wherein the first outcoupling portion (61) and the optical portion (60) overlap at least partially or are identical.

8. The optical element (1) according to claim 1, wherein the light entrance regions (4) are each designed as a recess (40) in the back side (2).

9. The optical element (1) according to claim 8, wherein the recess (40) is designed so as to at least partially or completely receive the light source (7) assigned to the optical system element (10).

10. The optical element (1) according to claim 8, wherein the recess (40) is defined by a bottom portion (41) on its side facing the front side (3).

11. The optical element (1) according to claim 10, wherein the bottom portion (41) is designed as a light-guiding portion in order to guide the second light rays (L2) in a defined manner onto the front-side surface portion (6) and onto the optical portion (60), if present, and/or wherein the bottom portion (41) is planar, or curved or convex toward the recess (40).

12. The optical element (1) according to claim 8, wherein the recess (40) is defined laterally by at least one side wall portion (42), wherein the recess (40) is defined laterally by at least two side wall portions (42) provided on opposite sides in the offset direction, and/or wherein the recess (40) is defined by the side wall portion(s) (42) so as to be laterally circumferentially closed.

13. The optical element (1) according to claim 12, wherein the at least one side wall portion (42) is designed as a further light-guiding portion in order to guide the first light rays (L1) in a defined manner onto the first deflection portion (51) of the deflecting surface portion (5), and/or wherein the at least one side wall portion (42) is planar or curved or convex.

14. The optical element (1) according to claim 1, wherein each of the optical system elements (10) has a lens head (8) on its back side (2) which comprises the light entrance region (4) and the first deflection portion (51) of the deflecting surface portion (5).

15. The optical element (1) according to claim 14, wherein the part of the deflecting surface portion (5) at least partially encloses the light entrance region (4) laterally and flanks the light entrance region (4) on both sides along the offset direction, or encloses the light entrance region (4) laterally such as to be circumferentially closed.

16. An optical element (1) for influencing light emitted by light sources (7), the optical element (1) comprising: a back side (2) facing the light sources (7); and a front side (3) facing away from the light source (7); wherein the optical element (1) has at least one pair of optical system elements (10) which are arranged offset next to one another laterally along an offset axis (V) and are integrally formed with one another, which are each optically assignable to a different one of the light sources (7), and which together form the back side (2) and together form the front side (3); wherein a light entrance region (4) for light from the assigned light source (7) entering the respective optical system element (10) is formed on the back side (2) of each optical system element (10), and a deflecting surface portion (5) is formed on the back side (2) of each optical system element (10); wherein a front-side surface portion (6) is formed on the front side (3) of each optical system element (10); wherein each optical system element (10) is designed so that first light rays (L1) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6), and second light rays (L2) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the front-side surface portion (6), undergo total-internal reflection at the front-side surface portion (6), subsequently are incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6); wherein the optical system elements (10) each have two wing portions (9), and the wing portions (9) of each optical system element (10) extend obliquely forward from the light entrance region (4) and away from one another.

17. The optical element (1) according to claim 16, wherein each wing portion (9) is provided with one of the second deflection portions (52) on a backward-facing flank (95) of the respective wing portion (9).

18. The optical element (1) according to claim 16, wherein one of the wing portions (9) of each optical system element (10) extends toward the respective other optical system element (10) of the pair of optical system elements (10), and the other one of the two wing portions (9) extends away from the respective other optical system element (10) of the pair of optical system elements (10).

19. The optical element (1) according to claim 16, wherein the optical system elements (10) of the pair of optical system elements (10) are formed integrally with one another via one of the wing portions (9).

20. The optical element (1) according to claim 16, wherein the front-side surface portion (6) has a depression (11) directed toward the light entrance region (4), wherein the depression (11) tapers toward the light entrance region (4), wherein the depression (11) is flanked laterally by the two wing portions (9) wherein the depression (11) is defined by the first outcoupling portion (61) and the optical portion (60).

21. The optical element (1) according to claim 1, wherein the optical system elements (10) of a pair of optical system elements (10) are designed so as to be symmetrical, and/or wherein the pair of optical system elements (10) is designed so as to be symmetrical with respect to a plane of symmetry(S) separating them.

22. The optical element (1) according to claim 1, further comprising a circumferentially closed optical edge (12), which extends away from the back side (2) in order to project, on the back side, beyond the light entrance regions (4), wherein the optical edge (12) extends away from the back side (2) such as to define, together with at least part of the back side (2), an optical compartment (13), in which all light entrance regions (4) of the optical element (1) are arranged, and in which the light sources (7) can be also arranged.

23. The optical element (1) according to claim 1, wherein the optical element (1) has several of the pairs of optical system elements (10) which are arranged in row configuration along a longitudinal axis (X) so as to form an elongated optical element (1) with two rows of optical system elements (10).

24. The optical element (1) according to claim 23, wherein the several pairs of optical system elements (10) are all formed integrally with one another via their wing portions (9).

25. A luminaire (100), comprising: an optical element (1) according to claim 1, and a different light source (7) per light entrance region (4), which light sources (7) are arranged such that the light from the respective light source (7) can enter the assigned optical system element (10) via the assigned light entrance region (4) for influencing by the optical element (1).

26. The luminaire according to claim 25, wherein the light sources (7) comprise LEDs.

27. The luminaire according to claim 25, further comprising a luminaire housing (101) in which both the light sources (7) and at least partially the optical element (1) are inserted and held, wherein the light sources (7) are accommodated in a luminaire compartment (113) which is formed by the luminaire housing (101) and the optical element (1), and is sealed.

28. An optical element (1) for influencing light emitted by light sources (7), the optical element (1) comprising: a back side (2) facing the light sources (7); and a front side (3) facing away from the light source (7); wherein the optical element (1) has at least one pair of optical system elements (10) which are arranged offset next to one another laterally along an offset axis (V) and are integrally formed with one another, which are each optically assignable to a different one of the light sources (7), and which together form the back side (2) and together form the front side (3); wherein a light entrance region (4) for light from the assigned light source (7) entering the respective optical system element (10) is formed on the back side (2) of each optical system element (10), and a deflecting surface portion (5) is formed on the back side (2) of each optical system element (10); wherein a front-side surface portion (6) is formed on the front side (3) of each optical system element (10); wherein each optical system element (10) is designed so that first light rays (L1) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6), second light rays (L2) of the light from the assigned light source (7), which light rays enter the optical element (1) via the light entrance region (4), are directly incident on the front-side surface portion (6), undergo total-internal reflection at the front-side surface portion (6), subsequently are incident on the deflecting surface portion (5), undergo total-internal reflection at the deflecting surface portion (5), and subsequently leave the optical element (1) via the front-side surface portion (6); and wherein the wing portions (9) of each optical system element (10) extend in a V-shaped flared manner from the light entrance region (4) toward the front side (3).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the figures:

(2) FIG. 1 shows a perspective rear view of an optical element according to a first exemplary embodiment of the present invention;

(3) FIG. 2 shows a perspective front view of the optical element according to FIG. 1;

(4) FIG. 3 shows a rear view of the optical element according to FIG. 1;

(5) FIG. 4 shows a cross-sectional view of the optical element along cut line A-A (along the offset axis) according to FIG. 3;

(6) FIG. 5 shows a cross-sectional view of the optical element along cut line B-B (along the longitudinal axis) according to FIG. 3;

(7) FIG. 6 shows a cross-sectional representation of a luminaire according to the invention with the optical element according to the invention according to FIG. 4 with an exemplary representation of first, second and third light rays; and

(8) FIG. 7 shows a cross-sectional representation of the luminaire according to the invention according to FIG. 6 with further components.

DETAILED DESCRIPTION OF THE EMBODIMENT

(9) The figures show an optical element 1 according to the invention for influencing light emitted by light sources 7 of a luminaire 100, and in FIGS. 6 and 7 a luminaire 100 equipped therewith. The light sources 7 preferably have LEDs which can be provided, for example, as LED module 70, as shown in FIGS. 6 and 7, on an (in this case common) printed circuit board 71.

(10) The optical element 1 according to the invention is described below. The optical element 1 has a back side 2 facing the light sources 7 (in FIGS. 4, 6, and 7, the upper side in each case; in FIGS. 1 and 3, the side facing out of the drawing plane) and a front side 3 facing away from the light sources 7 (in FIGS. 4, 6, and 7, the underside in each case; in FIG. 2, the side facing out of the drawing plane).

(11) The optical element 1 further has at least one pair of optical system elements 10, which are arranged offset next to one another laterally along an offset axis V and are furthermore integrally formed (i.e., formed in one piece) with one another, wherein the offset axis V extends in a left-to-right direction (offset direction V.sub.R) in FIGS. 3, 4, 6, and 7. This offset is preferably lateral or orthogonal to a vertical axis H of the optical element 1, which vertical axis H is thus preferably aligned perpendicular to the offset axis V. As can be seen for example in FIG. 6, the vertical axis H is preferably aligned parallel to a main emission direction R of the light sources 7 that are to be assigned or have been assigned.

(12) The optical system elements 10 are furthermore each optically assignable or assigned, to a different one of the light sources 7, as can be seen from the illustrated luminaires 100 in FIGS. 6 and 7.

(13) The optical system elements 10 also together form the back side 2thus each comprise part of the back side 2and furthermore together form the front side 3thus each comprise part of the front side 3, as can be seen in all figures.

(14) A light entrance region 4 for light from the assigned light source 7 entering the respective optical system element 10 is formed on the back side 2 of each optical system element 10. Furthermore, a deflecting surface portion 5 is formed on the back side of each optical system element 10. This can be seen for example in FIGS. 3, 4, and 6.

(15) Furthermore, a front-side surface portion 6 is formed on the front side 3 of each optical system element 10, as shown, for example, in FIGS. 2, 4, and 6.

(16) Now, each optical system element 10 is designed so that first light rays L1 of the light from the assigned light source 7, which light rays enter the optical element 1 via the light entrance region 4, are directly (i.e., without further deflection in the optical element 1) incident on the deflecting surface portion 5, undergo total-internal reflection at the deflecting surface portion 5, and subsequently leave the optical element 1 via the front-side surface portion 6.

(17) Each optical system element is further designed so that second light rays L2 of the light from the assigned light sources 7, which light rays enter the optical element via the light entrance region, are directly (i.e., without further deflection in the optical element 1) incident on the front-side surface portion 6, undergo total-internal reflection at the front-side surface portion 6, subsequently are incident on the deflecting surface portion 5, undergo total-internal reflection at the deflecting surface portion 5, and subsequently leave the optical element 1 via the front-side surface portion 6.

(18) FIG. 6 shows by way of example the above-described light guidance of the first light rays L1 and of the second light rays L2.

(19) Preferably, the optical system elements 10 can each be designed so that the first light rays L1 or the second light rays L2, after having undergone total-internal reflection at the deflecting surface portion 5, subsequently leave the optical element 1 directly (i.e., without further deflection in the optical element 1) via the front-side surface portion 6, as shown by way of example in FIG. 6.

(20) Optionally, each optical system element 10 can be further designed so that third light rays L3 of the light from the assigned light source 7, which enter the optical element 1 via the light entrance region 4, directly (i.e., without further deflection in the optical element 1) leave the optical element 1 via the front-side surface portion 6, as is also shown by way of example in FIG. 6.

(21) As can be seen in FIGS. 1, 3, 4, 6, and 7, the deflecting surface portion 5 can have at least a first deflection portion 51. This first deflection portion 51 serves for total-internal reflection of the first light rays L1. As can also be seen in these figures, the deflecting surface portion 5 can have at least a second deflection portion 52. This second deflection portion 52 serves for total-internal reflection of the second light rays L2. The first deflection portion 51 and the second deflection portion 52 are preferably provided as structurally separate units; i.e., they can be seen in defined and structurally separate regions, as shown by way of example in the figures.

(22) As can be seen in the figures, the first deflection portion 51 is provided for example so as to be closer to the light entrance region 4 than the second deflection portion 52. The first deflection portion 51 thus merges into the adjacent second deflection portion 52.

(23) As shown in particular in FIGS. 2, 6, and 7, the front-side surface portion 6 can have a first outcoupling portion 61 via which the first light rays L1 leave the optical element 1. The front-side surface portion 6 can further have at least a second outcoupling portion 62, via which the second light rays L2 leave the optical element 1, as also shown in the figures mentioned.

(24) As can be seen in particular in FIGS. 4 and 6, the second outcoupling portion 62 can extend in a plane E. In the exemplary embodiment shown here, all second outcoupling portions 62 extend in onei.e., in the sameplane E. The plane E is preferably aligned parallel to the offset axis V, as shown.

(25) The front-side surface portion 6 preferably has an optical portion 60 which serves for total-internal reflection of the second light rays L2, as is shown by way of example in FIG. 6. The optical portion 60 and the first outcoupling portion 61 preferably overlap at least partially or are even identical, as shown by way of example in FIG. 6.

(26) The light entrance regions 4 preferably each take the form of a recess 40 in the back side 2, as can be seen in particular in FIGS. 1, 3, and 6. The recess 40 is preferably designed so that it can at least partially or completely receive, or does receive at least partially or completely, the light source 7 assigned to the optical system element 10, as shown by way of example in FIGS. 6 and 7.

(27) On its side facing the front side 3, the recess 40 is preferably defined by a bottom portion 41. The bottom portion 41 can be designed as a light-guiding portion in order to guide the second light rays L2 in a defined manner onto the front-side surface portion 6 or the optical portion 60, as shown in FIG. 6. The bottom portion 41 can be planar or, as shown in FIG. 6, curved or convex toward the recess 40.

(28) The recess 40 can be defined laterally by at least one side wall portion 42. As shown in FIG. 6, the recess 40 can particularly preferably be defined laterally by at least two side wall portions 42 provided on opposite sides in the offset direction V.sub.R. In a particularly preferred configuration, the recess, as shown in FIG. 6, can preferably be defined by the side wall portion(s) 42 so as to be laterally circumferentially closed.

(29) The at least one side wall portion 42 can preferably take the form of a further light-guiding portion in order to guide the first light rays L1 in a defined manner onto the deflecting surface portion 5 or onto the first deflection portion 51, as shown by way of example in FIG. 6. As shown in FIG. 6, the at least one side wall portion 42 can be planar or curved or convex.

(30) As can be seen in the figures, each of the optical system elements 10 can have a lens head 8 on its back side 2 which comprises the light entrance region 4 and at least part of the deflecting surface portion 5 or of the first deflection portion 51. Said part of the deflecting surface portion 5 or of the first deflection portion 51 can at least partially enclose the light entrance region 4 laterally, as can be seen in particular in FIG. 6. Preferably, said part of the deflecting surface portion 5 or of the first deflection portion 51 can flank the light entrance region 4 on both sides along the offset direction V.sub.R or offset axis V, or can even enclose the light entrance region 4 laterally so as to be circumferentially closed, as shown in FIG. 6.

(31) As can be clearly seen in the figures, the optical system elements 10 can each have two wing portions 9. The wing portions 9 preferably extend obliquely forward (downward in FIGS. 4, 6, and 7) from the light entrance region 4 or from the lens head 8, and also away from one another. As can also be seen in the figures mentioned, the wing portions 9 of each optical system element 10 can extend in a V-shape flared manner from the light entrance region 4 or from the lens head 8 toward the front side 3.

(32) One of the second outcoupling portions 62 can be provided for each wing portion 9 at an end 90 of the respective wing portion 9 facing away from the light entrance region 4, i.e., at each distal end 90 of the two wing portions 9 provided to the right and left of each optical system element 10 in the exemplary embodiment shown in FIG. 6.

(33) Each wing portion 9 can be provided, on a forward-facing flank 96 of the respective wing portion 9, with one of the first outcoupling portions 61 or with one of the optical portions 60 (see, e.g., FIG. 6).

(34) Each wing portion 9 can be provided with one of the second deflection portions 52 on a backward-facing flank 95 of the respective wing portion 9 (see, e.g., FIG. 6).

(35) One of the wing portions 9 of each optical system element 10 can extend toward the respective other optical system element 10 of the pair of optical system elements 10, while the other one of the two wing portions 9 extends away from the respective other optical system element 10 of the pair of optical system elements 10, as shown in the exemplary embodiments shown in FIGS. 1, 2, 4, 6, and 7, where in each case two wing portions 9 directed toward one another (here in the middle of the optical element 1) and two wing portions 9 extending away from one another or rather away from the respective other optical system element 10 (i.e., the wing portions 9 of the optical element 1 which are located on the far right and far left) are shown.

(36) As can also be gathered from the exemplary embodiments of the figures, the optical system elements 10 of the pair of optical system elements 10 can be formed integrally with one another via one of the wing portions 9here, for example, the respective one wing portion 9which are directed toward one another here. The integral connection preferably is located in this case in a small region, preferably near the front side 3.

(37) As shown in FIGS. 1, 2, 4, and 6, the front-side surface portion 6 of each optical system element 10 can have a depression 11 directed toward the assigned light entrance region 4. As shown, the depression 11 can preferably taper toward the assigned light entrance region 4. The depression 11 can preferably be flanked laterally by the two wing portions 9 or their forward-facing flanks 96. The depression 11 is preferably defined by the first outcoupling portion 61 or the optical portion 60.

(38) The optical system elements 10 of a pair of optical system elements 10 are preferably designed so as to be mirror-symmetrical relative to one another. The pair of optical system elements 10 can therefore be designed so as to be (mirror-) symmetrical, namely preferably with respect to a plane of symmetry S separating them, which is preferably oriented parallel to the vertical axis H of the optical element 1 or the main emission direction R of the light sources 7.

(39) The optical element 1 can further have an optical edge, which extends away from the back side 2 in order to project, on the back side, beyond the light entrance regions 4, as can be seen, for example, in FIGS. 4 and 6.

(40) The optical edge can preferably extend away from the back side 2 so as to define, together with at least part of the back side 2, an optical compartment 13, in which all light entrance regions 4 of the optical element 1 are arranged (see FIG. 1), and in which preferably the light sources 7 can be, or are, also arranged (see FIGS. 6 and 7).

(41) As shown, the optical edge 12 can laterally define or flank the optical compartment 13 on both sides of the pair of optical system elements 10. However, the optical edge 12 can preferably also be laterally circumferentially closed, i.e., can laterally circumferentially define the optical compartment 13.

(42) The optical element 1 can comprise several of the pairs of optical system elements 10 which are arranged in row configuration along a longitudinal axis X so as to form an elongated optical element 1 with two rows of optical system elements 10. Here, the light entrance regions 4 of the respective optical system elements 10 of the pairs of optical system elements 10 are preferably each arranged in a row, namely preferably each parallel to the longitudinal axis X and parallel to one another. The several pairs of optical system elements 10 are preferably all formed integrally with one another, namely furthermore preferably via their wing portions 9, as can be gathered in particular from FIGS. 1 to 5.

(43) The exemplary embodiments of a luminaire 100 according to the invention shown in FIGS. 6 and 7 comprise the above-described optical element 1. Moreover, the luminaire 100 has a different light source 7 per light entrance region 4, which light sources 7 are arranged such that the light from the respective light source 7 can enter the assigned optical system 10 via the assigned light entrance region 4 for influencing by the optical element 1 in order to subsequently leave the optical element 1 at least partially via the front-side surface portion 6, as shown by way of example by the light paths of the first, second, and optional third light rays L1, L2, L3.

(44) The luminaire 100 can further comprise a luminaire housing 101 in which not only the light sources 7 but also at least partially the optical element 1 can be inserted and held.

(45) The light sources 7 can preferably be accommodated in a luminaire compartment 113 which is formed by the luminaire housing 101 and the optical element 1, and is preferably sealed. For this purpose, a seal 102 can be provided between the optical element 1in particular its optical edge 12 on the one hand and the luminaire housing 101 on the other handin order to provide the luminaire 100 in accordance with a defined IP protection class.

(46) The luminaire 100 shown here is, for example, a so-called FTL luminaire which can be used in a lighting system 200 having an elongated luminaire support rail 202. Such FTL luminaires usually have an elongated extension of usually 500 mm and can be arranged in any number in a row, and optionally interrupted by other electronic components, on the luminaire support rail 202 to form an elongated strip light. Such a lighting system 200 is shown by way of example in cross-section in FIG. 7.

(47) The luminaire 100 can have, for example, mechanical coupling elements (not shown) and/or electrical coupling elements 205. The electrical coupling elements 205 are electrically connected or connectable to the light source 7 or LED module 70 and serve for an optionally electrical coupling of electrical lines 201 of the lighting system 200. In the exemplary embodiment shown, the lighting system 200 has a luminaire support rail 202 with a substantially U-shaped cross-section. The electrical coupling element 205 can be inserted into an interior 204 of the luminaire support rail 202, and thus into the luminaire support rail 202, via the lateral (here: lower) opening 203 formed by the U-shaped cross-section. In its interior 204, the luminaire support rail 202 comprises the electrical lines 201, which preferably run along the longitudinal direction (here: parallel to the longitudinal axis X), (here: on both sides at opposite side walls of the luminaire support rail 202). They are provided, for example, in the form of a power bar which carries the electrical lines 201 in an insulating body (not shown), so that the electrical lines 201 can be electrically contacted preferably over the entire length of the power bar or luminaire support rail 202 from within the interior 204 via the electrical coupling element 205 and preferably via electrical contacts (not shown), which project laterally from the electrical coupling element 205. In order to selectively provide and release electrical contacting in an easy manner, the electrical coupling element 205 can be designed, for example, as a so-called rotary knob as known, for example, from the applicant's TECTON system. After inserting the rotary knob 205 into the luminaire support rail 202, the electrical contacts are pivoted out laterally by rotation of the rotary knob 205 in order to be electrically contacted with the lines 201 of the power bar lying laterally therefrom.

(48) Although a luminaire 100 in the form of an FTL luminaire has been described herein for illustrative purposes, the invention is not generally limited to luminaires of this type, but rather can be applied to any type of luminaire.

(49) The present invention is not limited by the exemplary embodiments described above, provided it is covered by the subject-matter of the following claims.