Optical element with shielding portion

Abstract

The invention relates to an optical element (1) for influencing light radiated by a light source, the optical element (1) being designed in one piece and having: at least one light entry portion (2) for coupling light from the light source into the optical element (1); a front face (3) for decoupling the coupled light in order to achieve a light output of the optical element (1); a back side (4) facing away from the front side (3); at least one structural part (6) which is arranged on the rear surface (4) for mechanical cooperation with other elements and / or for manufacturing; and a shielding portion (7) having a thickness (D) between the front face (3) and the rear face (4) and extending transversely to the thickness (D) in an extension direction (E). The thickness (D) of the masking portion (7) varies periodically in the direction of extension (E). The at least one structural part (6) is arranged in the region of the shielding part (7).

Description

[0001] The invention relates to an optical element for influencing light emitted by a light source.

[0002] Such optical element 101 (see Figure 5 and Figure 6 ) are in principle known from the prior art. These optical elements 101 are used in conjunction with the luminaire 100 to correspondingly influence the light output by the light source of the luminaire 100. The influence can be, for example, deflection, widening, narrowing or collimation, scattering, etc. Such optical elements 101 are designed to guide the corresponding light through them and are therefore usually made completely of light-transmitting material, such as glass or light-transmitting plastic.

[0003] Such optical elements 101 often have structural regions that are not necessary for the optical function of the optical element, or even interfere with it, but are necessary for other purposes, or are generated or unavoidable due to manufacturing reasons. These structural regions can be, for example, fixing regions for fixing the optical element, positioning elements for positioning the optical element or a component (such as an LED module) disposed on the optical element, fixing regions for fixing other elements (such as a reflector, a light emitting device, etc.), or can also be injection points generated due to manufacturing reasons during the process of manufacturing the optical element by an injection molding process.

[0004] Depending on the design of the optical element 101, it can happen that these possible structural regions are present in the region of the optical element 101, even if they are arranged on the side facing away from the light output, so that these structural regions can at least locally influence the light guidance of the light to be influenced by the optical element 101 in their region and / or have a negative influence on the optical appearance of the optical element 101 or of a luminaire 100 equipped with it, for example Figure 5 (wherein the upper lamp 100) and Figure 6 (luminaire 100 below). This relates in particular to small or narrow optical elements 101 or optical elements 101 which, due to their optical function, offer only limited space or no alternative space for arranging possible structural areas, so that these structural areas have a disruptive influence on the appearance of the optical element 101 in operation. It is also conceivable that, regardless of the overall size of the optical element 101, the position of the structural areas can be arranged particularly or only in optically relevant areas due to mechanical conditions. In these and other possible cases, the structural areas have to be arranged correspondingly in the optically relevant areas. The interaction of these structural areas with the light to be influenced through the optical element 101 can then lead to, for example, the generation of dark spots or bright spots on the optical element 101, as in Figure 5 and Figure 6 As shown by way of example in FIG. , the appearance of the optical element is thus adversely affected.

[0005] The object of the present invention is therefore to provide an optical element and a luminaire equipped with the same, which are intended to mask possible adverse effects due to corresponding structural parts and thus create an overall more harmonious appearance, especially during operation of the luminaire equipped with the optical element.

[0006] This object is achieved by the subject matter of the independent claim. The dependent claims develop the central idea of ​​the invention in a particularly advantageous manner.

[0007] According to a first aspect, the present invention relates to an optical element for influencing light radiated by a light source. The optical element is designed as an integral part. The optical element has at least one light incident part for coupling light from the light source into the optical element. In addition, the optical element has a front side for decoupling the coupled light to achieve light output of the optical element. In addition, the optical element has a back side facing away from the front side. In addition, the optical element has at least one structural part, which is arranged on the back side for mechanical cooperation with other elements and / or for manufacturing reasons. In addition, the optical element has a shielding part, which has a thickness between the front side and the back side and extends transversely to the thickness along an extension direction. Here, the thickness of the shielding part changes periodically along the extension direction. The at least one structural part is arranged in the area of ​​the shielding part.

[0008] By providing a corresponding shielding portion, a regular structure is created which has or produces a corresponding regular appearance of the optical element, in particular during operation. Thus, a defined interference structure is provided which, due to its periodic variation, presents a harmonious appearance. Since the structural parts are now arranged in the shielding portion, these structural parts are less noticeable or even not noticeable at all outside and during operation when the optical element is in use, in particular compared to the same optical element but without the shielding portion or shielding structure being provided. Thus, it is possible in a simple way to also arrange possible structural parts at more or less optically relevant positions, where the arrangement of the structural parts is particularly advantageous for technical reasons or manufacturing reasons, without ultimately having a (significant) adverse effect on the appearance of the optical element.

[0009] The at least one structural portion can preferably be arranged in a region of the shielding portion corresponding to a defined function value of the period, i.e. the period of the (periodic) thickness variation. In this way, it is particularly preferred that the structural portion be integrated in an optimized manner into the light output of the optical element and thus into its optical appearance, so that the presence of the structural portion can be better masked.

[0010] The optical element can preferably have a plurality of structural parts in the structural part. In this way, the desired redundancy can be created; for example, for fixing, positioning, etc. by means of structural parts. Alternatively or supplementarily, it is feasible to provide several functions by means of corresponding structural parts at / in the optical element, and then all of these structural parts can be correspondingly shielded.

[0011] At least some or all of the plurality of structural parts may preferably be arranged in a distributed manner along the shielding part. Since the shielding part extends along the extension direction accordingly, the structural parts provided in a spatial distribution may also be simply shielded accordingly.

[0012] At least some or all of the plurality of structural parts can preferably all be arranged in the region of the shielding part corresponding to the same defined function value of the period. It is thus possible that the shielding effect of all the structural parts involved is identical in the best case, thus producing an overall particularly harmonious appearance, so that the structural parts can be shielded particularly well.

[0013] The thickness of the shielding part can preferably vary sinusoidally in the direction of extension. In this way, a harmonious contour and thus a harmonious appearance of the shielding part can be created on the one hand. In addition, the shielding part provided in this way is particularly easy to manufacture. In principle, all other periodic variations of the thickness in the direction of extension of the shielding part are also conceivable, such as in particular a flowing thickness variation or a stepped thickness variation.

[0014] The thickness of the shielding part can vary periodically at least between a greater thickness and a smaller thickness along the extension direction, wherein the structural part or (if there are multiple structural parts) multiple structural parts are each arranged in the area of ​​the shielding part with a greater thickness, or alternatively in the area of ​​the shielding part with a smaller thickness. In this way, a harmonious appearance can be achieved on the one hand, and optimal shielding of the corresponding structural part can be achieved on the other hand. Therefore, depending on the geometric design of the structural part, the presence of the structural part can be shielded in a targeted manner due to the corresponding light guidance of the optical element.

[0015] The larger thickness may preferably be the maximum thickness of the shielding portion. The smaller thickness may preferably be the minimum thickness of the shielding portion. In this way, the structural portion may be arranged in the maximum or minimum thickness region of the shielding portion, thus optically shielding the presence of the structural portion to a large extent.

[0016] The shielding portion can preferably extend in a plane on the side of the front side. In this case, the shielding portion is designed on the back side to have a corresponding periodic change in thickness or height relative to the front side along the extension direction. Such a design is advantageous for optical elements such as TIR lenses, so as to correspondingly and advantageously shield the structural portion on its back side.

[0017] Alternatively, it is also conceivable that the shielding part extends in one plane on the side of the back side. In this case, the shielding part has a thickness or height on the front side of the optical element that varies periodically in the extension direction relative to the back side. Such a design is advantageous, for example, for so-called bubble lenses in order to correspondingly achieve the best possible shielding of the structural parts arranged on the back side.

[0018] In principle, the optical element can be any type of optical element, such as a TIR lens, a bubble lens, a symmetric lens, an asymmetric lens, etc.

[0019] Preferably, the front and back sides limit the thickness of the shielding part. Therefore, the shielding part is completely limited by the front and back sides and is therefore spatially designed to be optimal. Therefore, a flat optical element with high efficiency (including shielding) can be provided overall.

[0020] The light entry section can preferably have a lens pot. In this way, a highly efficient light coupling of the light output by the light source into the optical element can be achieved and thus a high efficiency of the luminaire operated with the optical element can be achieved overall. Other possibilities for forming the light entry section are also conceivable, in particular by means of a structural design and / or surface treatment of the optical element.

[0021] Preferably, the end face of the optical element connecting the front and rear faces and preferably surrounding them can have or form the light entrance portion. In this way, for example, the corresponding end face can directly form the light entrance portion and, for example, couple accordingly at any position. It is also conceivable that the end face has a corresponding light entrance portion; for example in the form of a lens pot or the like.

[0022] Alternatively or in addition, it is conceivable that the back side has a light entrance portion. This can be achieved, for example, by a corresponding structural design of the back side. In this way, a light entrance area in the form of a lens pot as described can be designed on the back side, for example. As mentioned above, other possibilities for forming the light entrance portion are also conceivable.

[0023] Preferably, a plurality of the light incident portions may be arranged in at least one row along a longitudinal axis of the arrangement.Therefore, the optical element preferably has a lens array.

[0024] A plurality of these light entry portions can preferably also be arranged in a plurality of rows along the respective longitudinal axis of the arrangement; particularly preferably on the back side. The optical element can thus have a plurality of lens arrays and particularly preferably form a lens grid. The optical element can thus be designed in an elongated form and can be used, for example, as an optical element for a light strip luminaire.

[0025] The longitudinal axes of the arrangement of the plurality of rows can preferably be arranged parallel to one another and preferably all in one plane. Thus, a defined lens grid can be provided and an overall flat optical element can be provided. The optical element can likewise be designed in an elongated form and can be provided, for example, as an optical element of a light strip luminaire with a particularly defined light guidance.

[0026] Each two adjacent rows in the plurality of rows can preferably be connected to each other via an integral connecting portion of the optical element. Thus, a stable design of the optical element can be made possible.

[0027] The connecting part can preferably have a shielding part, so that the shielding part can be arranged in a simple manner in a defined area, particularly preferably in an area that is hardly relevant for optics.

[0028] The shielding part can preferably form the connecting part. In this way, the shielding part can be provided in a particularly space-saving and easy-to-manufacture manner.

[0029] These light entrance portions can be arranged preferably evenly distributed in each row along the longitudinal axis of the arrangement; preferably at regular intervals. In this way, the functions provided by the structural portions can be defined and distributed and thus preferably provided in an optimal manner. The regular interval can particularly preferably correspond to X times the period length of the period of the thickness variation (wherein X is an element of a natural number; i.e. ). Thus, the optical impact of the structural part can be reduced or minimized to a large extent and its functional properties can be improved or maximized at the same time.

[0030] Each of these light entrance portions can preferably be adjacent to a region of the shielding portion having a greater (or maximum) thickness. Alternatively, it is also conceivable that each of these light entrance portions is adjacent to a region of the shielding portion having a smaller (or minimum) thickness. Thus, the structure portion is highly coordinated with the plurality of light entrance portions via the regularity of the shielding portion, which produces a particularly harmonious optical appearance and thus a high degree of shielding.

[0031] The shielding part or its extension direction can preferably extend along the shielding longitudinal axis. Through the straight extension of the shielding part, a corresponding harmonious appearance can be generated when necessary. This is particularly useful for slender or large-area optical elements.

[0032] Particularly preferably, the shielding longitudinal axis and the arrangement longitudinal axis are aligned parallel to each other, so that the shielding part can be provided in a space-saving manner and thus an overall compact optical element can be provided. In addition, a particularly harmonious appearance of the corresponding optical element can be provided in this way.

[0033] The structural part can preferably extend from the back side to the back side. In this way, the structural part can be simply provided so that the purpose of its definition can be achieved, for example, the purpose of installation, fixing or positioning.

[0034] The structural part can be a solid body or a hollow body. Thus, for example, it is conceivable that the structural part is provided as a solid body for forming a positioning pin or a snap hook. As a hollow body, the structural part (for example in the form of a hollow cylinder or a threaded cap) can serve as a receiving part for a fixing element such as a screw in order to fix the component at the optical element or to mount the optical element itself.

[0035] The structural part can preferably have a convex and / or concave arched outer surface, which preferably deflects the coupled light in a defined manner. In this way, the structural part itself can have a supplementary light deflecting function, so that its presence can be further concealed and the efficiency of the optical element can be further increased overall. The structural part can preferably have at least one of the following groups or a combination: a mounting part for fixing the optical element, a positioning pin, a fixing part for fixing a luminaire assembly or other further elements, and / or an injection point, which is produced, for example, when manufacturing the optical element with injection molding technology.

[0036] The optical element can preferably be made entirely of a light-transmitting material (such as optical plastic), preferably by injection molding or continuous casting, or by glass. Thus, the optical element can be provided in a simple and optically optimal manner according to given requirements.

[0037] According to another aspect, the present invention also relates to a luminaire having an optical element according to the present invention and a lighting device having at least one light source. In this case, the lighting device is arranged relative to the optical element so that the light emitted by the light source can be coupled into the optical element via the light incident portion, and the light thus coupled can then be output via the front face. Thus, a luminaire can be provided that utilizes all the advantages of the optical element according to the present invention and can therefore effectively shade the corresponding structural portion, which results in an overall harmonious appearance of the luminaire.

[0038] The lighting device can preferably be an LED lighting device with at least one LED as a light source or can have such an LED lighting device. Thus, an effective, durable and economic lighting device can be provided, which further requires only a small installation space, thereby enabling the luminaire to be designed to be particularly small or flat.

[0039] The light emitting device and / or other lamp components (e.g. reflectors) can preferably be positioned and / or fixed by means of the structural part. Thus, the structural part can be used in a variety of ways to provide a highly efficient lamp. In addition, other elements are also conceivable, which can be fixed by means of the structural part, such as sensors, etc.

[0040] This lamp can preferably also have a lamp housing, wherein the optical element is preferably mounted at the lamp housing via a structural part (or a part thereof) in this case. In this way, the structural part for mounting the optical element can be optically shielded in a simple manner.

[0041] Other designs and advantages of the present invention are described below with reference to the accompanying drawings.

[0042] Figure 1 shows a perspective view of an optical element according to a first embodiment of the present invention,

[0043] Figure 2 shows a perspective detail view of an optical element according to a second embodiment of the invention,

[0044] Figure 3 shows a detailed cross-sectional view of an optical element according to a third embodiment of the present invention,

[0045] Figure 4 Shown according to Figure 3 A top view of the optical components.

[0046] Figure 5 shows a comparison of a luminaire equipped with a conventional optical element (top) and a luminaire equipped with the optical element of the present invention (bottom), and

[0047] Figure 6 Shown according to Figure 5 Perspective views of a luminaire equipped with conventional optical elements (bottom) and a luminaire equipped with the optical elements of the present invention (top).

[0048] These figures show different designs of an optical element 1 for influencing the light output by a light source according to the present invention. The optical element 1 is designed as a whole. Here, the optical element 1 can preferably be made of a light-transmitting material (such as a light-transmitting plastic) (preferably by an injection molding process or a continuous casting process) or made of glass.

[0049] The optical element can have at least one, here a plurality of, light entrance portions 2 for coupling light from a light source into the optical element 1. In the embodiment shown here, the light entrance portions 2 each have a lens pot 20, which is designed here by way of example so that it can at least partially accommodate a light source of a lighting device, such as an LED, in order to thus effectively couple the light output by the light source into the optical element 1.

[0050] In addition, the optical element 1 has a front side 3 for decoupling the coupled light to achieve light output of the optical element 1. The front side 3 can be designed in any manner. For example, it can have a flat light output surface extending in one plane. Alternatively, the front side 3 can also be structured, as shown in the present embodiment, and in addition to the decoupling part, it can also have a defined deflection part, etc. The front side 3 can have a structure that affects the light, such as a surface profile, surface damage, etc., or it can have a defined geometric shape, for example, for light bundling, light broadening, light orientation, light scattering, etc.

[0051] Furthermore, the optical element 1 has a rear side 4 facing away from the front side 3. In the embodiment shown here, the rear side 4 has a light entrance section 2, or here a plurality of light entrance sections. Alternatively or in addition, it is also conceivable that the end face connecting the front side 3 and the rear side 4 and preferably surrounding it has or forms the light entrance section or the plurality of light entrance sections 2.

[0052] As shown in the figure Figure 4 As shown in the embodiment shown in FIG. 1 , a plurality of these light entrance portions 2 can be arranged in at least one row R1, R2 along the arrangement longitudinal axis A. In the embodiment shown here, a plurality of these light entrance portions 2 are arranged in a plurality of rows R1, R2 along the respective arrangement longitudinal axis A; preferably here on the back side 3 of the optical element 1. As can also be seen from the embodiment shown, the arrangement longitudinal axes A of the plurality of rows R1, R2 can be arranged parallel to one another and preferably all in one plane.

[0053] The light entrance portions 2 may be arranged uniformly distributed in each row R1, R2 along the longitudinal axis A of the arrangement, preferably at regular intervals, such as for example from Figure 1 As can be seen from Figure 1 and Figure 2 As can be seen in FIG. 1 , the regular spacing can particularly preferably correspond to X times the period length of the period of the thickness variation, where X is an element of a natural number. exist Figure 2 In FIG. 1 , two adjacent periods of thickness variation are graphically highlighted as an example.

[0054] Each of these light entry portions 2 may preferably be adjacent to a region of the shielding portion 7 having a greater (eg, maximum) thickness D1. Figure 1 and Figure 2 As is evident from FIG. 1 , each of these light incident portions 2 is adjacent to a region of the shielding portion 7 having a smaller (here smallest) thickness D1. This is also particularly evident from Figure 4 It can be seen in.

[0055] As in particular from Figures 1 to 4 As can be seen in FIG. 1 , each two adjacent rows in the plurality of rows R1 , R2 can be connected to each other via an integral connecting portion 5 of the optical element 1 .

[0056] Furthermore, the optical element 1 has a structure 6, which is arranged on the back side 4 for mechanical coordination with other elements and / or for manufacturing reasons. Here, as shown here, the structure 6 can extend away from the back side 3. The structure 6 can be a solid body, such as in Figure 1 or may be a hollow body, as in Figure 1 and Figure 2 The structured portion 6 can have a convex and / or concave arcuate outer surface which preferably deflects the coupled light in a defined manner.

[0057] The structural part 6 can be used for mechanical cooperation with other elements and thus, for example, form a mounting part for fixing the optical element 1, such as a positioning pin for positioning and aligning a lamp assembly or other elements, or a fixing part for fixing a lamp assembly or other elements. As mentioned above, the structural part 6 can also be provided for manufacturing reasons and can, for example, form an injection point in the optical element 1 manufactured by an injection molding process.

[0058] Furthermore, the optical element 1 has a shielding portion 7 which has a thickness D between the front side 3 and the rear side 4 and which extends transversely to the thickness D in an extension direction E (see in particular Figure 3 , combined with Figure 1 , Figure 2 and Figure 4 As shown in the embodiment, the shielding part 7 or its extension direction E can extend along the shielding longitudinal axis K; that is, it can extend in a straight line. As can be seen in the figures, the shielding longitudinal axis K and the arrangement longitudinal axis A can be aligned parallel to each other. Figures 1 to 4 As can be seen in FIG. 5 , the connecting part 5 can have the shielding part 7 , or the shielding part 7 can form the connecting part 5 .

[0059] As in particular from Figures 1 to 4As can be seen in FIG. 1 , the thickness D of the shielding portion 7 varies periodically along the extension direction E. In the embodiment shown, the thickness D of the shielding portion 7 varies sinusoidally along the extension direction E.

[0060] The thickness D of the shielding part 7 preferably varies periodically at least between a greater thickness D1 and a smaller thickness D2 along the extension direction E. As shown here, the greater thickness D1 can preferably be the maximum thickness of the shielding part 7. The smaller thickness D2 can preferably be the minimum thickness of the shielding part 7 as shown here.

[0061] The front side 3 and the back side 4 can preferably limit the thickness D of the shielding part 7, as shown in the embodiment shown. The shielding part 7 can preferably extend in one plane on the side of the front side 3, such as in particular in Figure 3 Alternatively, it is also conceivable that the shielding part 7 extends in one plane on the side of the back side 4 (not shown).

[0062] The at least one structural part 6 is arranged in the region of the shielding part 7 .

[0063] In order to achieve the desired optical shielding effect, the at least one or more structural parts 6 can be arranged in the area of ​​the shielding part 7 corresponding to the defined function value of the period of thickness variation. In the present case, the function value of the period is the local maximum of the period of thickness variation, which is the absolute maximum here; that is, the area with a larger or maximum thickness D1 of the shielding part 7. Alternatively, it is also conceivable that the structural part 6 or multiple structural parts 6 are each arranged in the area of ​​the shielding part 7 with a smaller or minimum thickness D2.

[0064] As described and shown in the embodiments, the optical element can have a plurality of these structural parts 6. At least some of the plurality of structural parts 6 or, as shown here, all structural parts can preferably be arranged distributed along the shielding part 7; preferably uniformly distributed. In the embodiment shown, for example, all structural parts 6 are arranged in the area of ​​the shielding part 7 with a greater or maximum thickness D1; ​​i.e., the local maximum of the period of the thickness variation or the defining function value of this absolute maximum. Therefore, the structural parts 6 involved can all be arranged in the area of ​​the shielding part 7 corresponding to the same defining function value.

[0065] Reference Figure 5 and Figure 6 The present invention also relates to a lamp 10, which, in addition to the optical element 1 according to the present invention, also has a lighting device with at least one light source. The lighting device can be, for example, an LED lighting device having at least one or more LEDs as light sources.

[0066] The lighting device is arranged relative to the optical element 1 in such a way that light emitted by the light source is coupled into the optical element 1 via one or more of the light entrance sections 2 , and the light coupled in this way can then be output via the front side 3 .

[0067] The lighting device and / or other elements or lamp components (such as a reflector) can preferably be positioned and / or fixed by means of the structural part 6 .

[0068] The luminaire 10 can also have a luminaire housing (not shown here), wherein the optical element 1 can be mounted on the luminaire housing via the structural part 6 .

[0069] The invention is not limited to the embodiments described above, insofar as it is encompassed by the subject matter of the following claims.

Claims

1. An optical element (1) for influencing light emitted by a light source, wherein: The optical element (1) is designed as an integral unit and has: at least one light incident portion (2) for coupling light from the light source into the optical element (1); A front side (3) for decoupling the coupled light to achieve light output of the optical element (1); a back side (4) facing away from the front side (3); at least one structural part (6), which is arranged on the back side (4) for mechanical cooperation with other elements and / or for manufacturing reasons; a shielding portion (7) having a thickness (D) between the front side (3) and the back side (4) and extending in an extension direction (E) transverse to the thickness (D), wherein the thickness (D) of the shielding portion (7) varies periodically along the extension direction (E), and Wherein, the at least one structural part (6) is arranged in the area of ​​the shielding part (7).

2. The optical element (1) according to claim 1, wherein: The at least one structural portion (6) is arranged in a region of the shielding portion (7) corresponding to a defined function value of the period.

3. The optical element (1) according to any one of the preceding claims, wherein: The optical element (1) has a plurality of structural parts among the structural parts (6).

4. The optical element (1) according to claim 3, wherein: At least some or all of the multiple structural parts (6) are distributed along the shielding part (7).

5. The optical element (1) according to claim 2 and 4, wherein: At least some or all of the plurality of structural portions (6) are all arranged in a region of the shielding portion (7) corresponding to the same defined function value.

6. The optical element (1) according to any one of the preceding claims, wherein The thickness (D) of the shielding portion (7) varies sinusoidally along the extension direction (E).

7. An optical element (1) according to any one of the preceding claims, wherein: The thickness (D) of the shielding portion (7) varies periodically between a larger thickness (D1) and a smaller thickness (D2) along the extension direction (E), wherein the structural portion (6) or, if there are multiple structural portions, the multiple structural portions (6) are each arranged in an area of ​​the shielding portion (7) having the larger thickness (D1) or the smaller thickness (D2).

8. The optical element (1) according to claim 7, in, The greater thickness (D1) is the maximum thickness of the shielding portion (7), and / or The smaller thickness (D2) is the minimum thickness of the shielding portion (7).

9. The optical element (1) according to any one of the preceding claims, wherein: The shielding portion (7) extends in one plane on the side of the front face (3), or The shielding portion (7) extends in a plane on the side of the back side (4).

10. The optical element (1) according to any one of the preceding claims, wherein: The front surface (3) and the back surface (4) limit the thickness (D) of the shielding portion (7).

11. The optical element (1) according to any one of the preceding claims, wherein The light incident portion (2) has a lens pot (20).

12. The optical element (1) according to any one of the preceding claims, in, The end surface connecting the front surface (3) and the back surface (4) and preferably surrounding it has or forms the light incident portion (2), and / or The back surface (4) has the light incident portion (2).

13. The optical element (1) according to any one of the preceding claims, wherein: A plurality of the light incident portions (2) are arranged in at least one row (R1, R2) along an arrangement longitudinal axis (A).

14. The optical element (1) according to any one of the preceding claims, wherein A plurality of the light incident portions (2) are arranged in a plurality of rows (R1, R2) along a respective arrangement longitudinal axis (A), preferably on the back side (4).

15. The optical element (1) according to claim 14, wherein: The arrangement longitudinal axes (A) of the rows (R1, R2) are arranged parallel to each other and preferably all in one plane.

16. The optical element (1) according to claim 14 or 15, wherein: Every two adjacent rows in the plurality of rows (R1, R2) are connected to each other via an integral connecting portion (5) of the optical element (1).

17. The optical element (1) according to claim 16, wherein: The connecting portion (5) has the shielding portion (7), or the shielding portion (7) forms the connecting portion (5).

18. The optical element (1) according to any one of claims 13 to 17, wherein: The light incident portions (2) are arranged uniformly distributed in each row (R1, R2) along the longitudinal axis (A) of the arrangement, preferably at regular intervals, wherein the regular intervals particularly preferably correspond to X times the period length of the period of the thickness variation, wherein X is an element of a natural number 19. The optical element (1) according to claim 7 in combination with claim 18, in, Each of the light incident portions (2) is adjacent to a region of the shielding portion (7) having the greater thickness (D1), or Each of the light incident portions (2) is adjacent to a region of the shielding portion (7) having the smaller thickness (D1).

20. The optical element (1) according to any one of the preceding claims, wherein The shielding portion (7) or its extension direction (E) extends along the shielding longitudinal axis (K), Therein, preferably, the shielding longitudinal axis (K) and the arrangement longitudinal axis(es) (A), if present, are aligned parallel to each other.

21. The optical element (1) according to any one of the preceding claims, wherein The structural portion (6) extends backward from the back surface (4).

22. An optical element (1) according to any one of the preceding claims, wherein: The structural part (6) is a solid body or a hollow body.

23. An optical element (1) according to any one of the preceding claims, wherein: The structural part (6) has a convex and / or concave arched outer surface, which preferably deflects the coupled light in a defined manner.

24. An optical element (1) according to any one of the preceding claims, wherein The structural part (6) has at least one or a combination of the following groups: A mounting portion for fixing the optical element (1), ·Location pins, · Used to fix the fixing part of the lamp assembly, Injection point.

25. An optical element (1) according to any one of the preceding claims, wherein The optical element (1) is entirely made of a light-transmitting material, preferably made of light-transmitting plastic, particularly preferably made by an injection molding process or a continuous casting process, or made of glass.

26. A lamp (10), comprising: An optical element (1) according to any one of the preceding claims; A lighting device having at least one light source, wherein: The light emitting device is arranged relative to the optical element (1) in such a way that light emitted from one or more of the light sources is coupled into the optical element (1) via one or more of the light incident portions (2), and the light thus coupled is then output via the front side (3).

27. The luminaire (10) according to claim 26, wherein: The lighting device is an LED lighting device having at least one LED as a light source.

28. The luminaire (10) according to claim 26 or 27, wherein: The lighting device and / or other lamp components, such as a reflector, are positioned and / or fixed by means of the structural part (6).

29. The luminaire (10) according to any one of claims 26 to 28, further comprising a luminaire housing, wherein: The optical element (1) is mounted on the lamp housing via the structural part (6).

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