Luminaire

Abstract

The invention relates to a luminaire (1) comprising a light source (2), a profiled support element (3), and a transparent light deflection element (5) which can be at least partly transilluminated by the light source (2) and at least partly surrounds the light source (2), wherein the light-deflection element (5) is designed to bundle light in order to generate an exit light cone in a radiation direction and to block light for directions outside the exit light cone.

Description

[0001] P29240PC00 12.01.2026

[0002] 1 / 32

[0003] light

[0004] TECHNICAL AREA

[0005] The present disclosure relates to a luminaire, in particular a luminaire for illuminating an interior or exterior space in a public or private area.

[0006] BACKGROUND OF THE REVELATION

[0007] Light focusing is a key concept in lighting technology, aiming to concentrate light precisely in a defined area. Modern luminaires, especially those with LED technology, use precise optical systems to maximize efficiency, functionality, and light quality.

[0008] In contrast, light blocking is a technique that specifically prevents light from emitting in unwanted directions. This is achieved using optically shielding elements such as reflectors, baffles, and light shields.

[0009] EP3792549A1 discloses an optical device comprising a lens with a light-entry surface and a light-emission surface. The light-entry surface has prismatic surfaces and, in particular, V-shaped projections in the central region to direct light largely in a single direction.

[0010] US10323824B1 discloses a light fixture with a linear LED array and a Fresnel-type lens covering the LED array. The lens has a first surface where the light enters and a second surface where P29240PC00 12.01.2026

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[0012] The light exits the lens. In particular, the lens features a multitude of light-directing prismatic structures. Furthermore, the lens can be divided into several sections and can be made of materials with different optical properties. This achieves a wide beam angle, largely within a hemisphere around the luminaire.

[0013] US2016320017A1 discloses a light beam control module comprising a body that includes an optical axis and several structured surfaces. A light-entry surface is located on the inside of the body, and a light-emission surface is located on the outside. This achieves omnidirectional light emission into a hemisphere around the luminaire.

[0014] FR3146976A1 discloses a lighting device comprising a light guide. Reflecting prisms are arranged on the back of the light guide.

[0015] CN206412378U discloses an LED backlight for a TV screen comprising an LED substrate, fluorescent silica gel, and a two-part convex spherical silicone lens. A secondary lens is avoided.

[0016] SUMMARY OF THE REVELATION

[0017] Luminaires known from the prior art have complex geometries and are therefore difficult to manufacture. Furthermore, light loss can occur due to light shielding, and reflection or scattering can also occur, which can impair the overall efficiency of the luminaires. Luminaires that rely on specific geometric shapes P29240PC00 12.01.2026

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[0019] They are also less flexible in adapting to the rooms to be illuminated and the desired lighting requirements.

[0020] One object of the invention is to provide a luminaire that enables light control with low light loss and is also easier to manufacture. A further object of the invention is a method for manufacturing a light-controlling element for such a luminaire, as well as a method for manufacturing a luminaire with the light-controlling element.

[0021] This problem is solved by the subject matter of the independent claims. Preferred embodiments are disclosed from the dependent claims, combinations of claims, and from the description in conjunction with the figures.

[0022] In a first aspect, a luminaire according to the present disclosure comprises a light source. A light source can be a single light-emitting diode (LED) or an LED array, e.g., a plurality of LEDs. The light source can, in particular, be controlled from an on-state to an off-state; however, continuous illumination is also conceivable.

[0023] The luminaire also includes a support profile. This support profile is preferably designed to hold the light source. Typically, the support profile includes interfaces where mounting elements are operatively connected. Mounting elements can be, for example, a rope, a chain, and / or a cable. The support profile allows for simpler and more flexible mounting of the luminaire. Depending on the application, the support profile can consist of a single element or of P29240PC00 12.01.2026

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[0025] It can be formed from several individual elements. For example, several semicircular sub-support profiles, such as two semicircular sub-support profiles, can be given, which together form the support profile.

[0026] The luminaire further comprises a transparent light-directing element that is at least partially translucent from the light source. In particular, the light-directing element enables more targeted light distribution and also simplifies manufacturing. The light-directing element at least partially surrounds the light source. This arrangement allows the light from the light source to be directed more efficiently and precisely, minimizing stray light and producing more focused illumination. The light-directing element can preferably be supported by the mounting profile. This allows for a more compact design of the luminaire.

[0027] The light-directing element is also designed to focus the light to produce an emitted light cone (or, more generally, an emitted light beam) in a specific direction. The direction of radiation indicates the preferred direction in which the emitted light cone is directed. Overall, the luminaire can thus provide more targeted illumination.

[0028] Furthermore, the light-directing element is designed to block light from directions outside the emitted light cone. This light blocking ensures that light in unwanted directions is specifically reduced to a minimum or completely eliminated, thus enabling a glare-free view of the luminaire and improving user comfort. P29240PC00 12.01.2026

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[0030] The light-guiding element thus offers the overall advantage of focusing light within the exit cone and simultaneously blocking light outside the exit cone. In preferred embodiments, this is achieved exclusively by refraction of light at rounded optical surfaces in a light-guiding region of the light-guiding element.

[0031] In one embodiment, the light focusing results in an approximately uniform light distribution or a batwing light distribution within the emitted light cone. A batwing light distribution enables a uniform light distribution without significant differences in brightness. Depending on the application, the batwing light distribution can encompass an emitted light cone with a beam angle between 20° and 100°, particularly between 20° and 65°. Overall, this ensures a more uniform light distribution and greater application flexibility.

[0032] To minimize light loss, the light source is at least partially surrounded by a translucent space. Furthermore, this translucent space can be at least partially enclosed by the light-directing element. A medium that specifically influences the properties of the light can be placed within this space. This medium could, for example, be air with a refractive index of 1.

[0033] In one embodiment, the light-guiding body has a light-entry surface directed towards the light source, at least in one light-guiding area. This light-entry surface serves as a refractive surface. For example, light from the light source first passes through the optical gap and is then refracted at the P29240PC00 12.01.2026

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[0035] The light-intake surface is refracted. In addition to the light-intake surface, the light-guiding body has a light-emission surface within the light-guiding area. The light-emission surface, in turn, serves as a refractive surface. For example, light that is refracted at the light-intake surface is refracted again at the light-emission surface. The light-guiding area is defined by the spatial area of ​​the light-guiding body in which the light is directed and distributed to achieve the desired lighting effect. The light-guiding area includes the optical components, in particular rounded optical surfaces for light refraction, which are used to direct the light from the light source in the desired direction of emission.

[0036] For optimized light refraction at the light-entry surface, the light-entry surface, in a cross-sectional view through the light-guiding body, exhibits a partially concave contour, particularly in the direction of radiation. This partially concave contour enables more precise control of the light distribution and can potentially reduce scattering losses. Specifically, the partially concave contour extends across the entire light-entry surface, at least within the light-guiding area of ​​the light-guiding body.

[0037] The precision of light refraction can be further increased by having the partially concave contour of the light-entry surface, relative to an imaginary circular contour, exhibit a flattening in at least one lateral region of the light-guiding area. In particular, the at least one lateral region comprises a linear and / or circular sub-contour. This allows, for example in the case of a circular sub-contour, a local thickening of the light-guiding body and a converging lens effect for improved focusing of the light.

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[0039] The exit light cone is reached. If at least one lateral region comprises the imaginary circular contour, the flattening exhibits a lesser curvature than that of the imaginary circular contour in the light-guiding area. In particular, if at least one lateral region comprises the linear partial contour, the flattening exhibits a curvature of essentially zero.

[0040] Preferably, the light-emitting surface in a cross-sectional view through the light-guiding body has a convex contour, particularly in the direction of radiation. The convex contour is preferably a circular convex contour, especially a completely circular convex contour, extending over the entire light-emitting surface. Such a geometry serves to achieve, at least in a lateral region of the light-guiding area, the local thickening of the light-guiding body and the converging lens effect for improved focusing of the emitted light cone. Furthermore, such a geometry can be manufactured more easily.

[0041] In one embodiment, the light-guiding element acts as a converging lens in at least one lateral light-guiding area, and in particular in two lateral light-guiding areas. Additionally, the light-guiding element can act as a diverging lens in a central light-guiding area. This combination enables targeted light dispersion in the central light-guiding area and targeted light focusing in the lateral light-guiding area(s). Overall, a more uniform distribution of light between the central light-guiding area and the at least one lateral light-guiding area is achieved. P29240PC00 12.01.2026

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[0043] A simpler manufacturing process for a light-directing body can be achieved if the light-intake and light-outtake surfaces are or include rounded optical refraction surfaces, at least in the light-directing area. Specifically, the light-intake and light-outtake surfaces are completely rounded optical refraction surfaces. The optically rounded refraction surfaces also offer the advantage of glare-free light distribution, meaning a glare-free view of the luminaire from an angle outside the emitted light cone.

[0044] In comparison to state-of-the-art luminaires, the light entry surface and the light exit surface can be shaped without or free of prismatic refraction surfaces, thus enabling more efficient light distribution, especially with less stray light, and also a simpler manufacture of the light-guiding body.

[0045] In some embodiments, the luminaire or light-directing element can be shaped without or free of diaphragms for light blocking. Alternatively or additionally, the light-directing element can be shaped without or free of reflectively coated surfaces for light blocking. This simplifies the luminaire's design and maximizes light utilization while minimizing light loss.

[0046] In one embodiment, the light-guiding body comprises or consists of transparent plastic, in particular polycarbonate or PMMA. For example, the polycarbonate can have a refractive index of n=1.585 and an angle of total internal reflection of 39°, or PMMA can have a refractive index of n=1.49 and an angle of total internal reflection of 42°. Alternatively, or P29240PC00 12.01.2026

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[0048] The light-guiding element consists of glass, in particular crown glass or quartz glass. For example, crown glass can have a refractive index in the range of n=1.46 to n=1.65 and an angle of total internal reflection in the range of 43° to 37°, or quartz glass can have a refractive index of n=1.54 and an angle of total internal reflection of 40.5°.

[0049] A significant advantage of the luminaire according to the invention is its versatility in design. The luminaire can be toroidal, cylindrical, or spherical. A toroidal luminaire can be formed from a semicircular light-guiding body and semicircular support profiles. The light source can be an arrangement of several LEDs. In this embodiment, the semicircular support profiles and semicircular light-guiding bodies can be offset from each other by half a semicircle, in particular by 90°.

[0050] To allow for mounting between the light-guiding element and the support profile, the light-guiding element has a recess in a mounting area to receive the support profile. This mounting area is preferably located above the light source. The support profile can be positioned in the recess of the light-guiding element. This allows for a more compact design of the luminaire.

[0051] A more stable and reliable connection between the light-guiding element and the support profile can be achieved if the light-guiding element forms a positive fit with the support profile. In particular, the positive fit can be achieved on a part of the mounting area of ​​the light-guiding element, especially with P29240PC00 12.01.2026

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[0053] the recess. This eliminates the need for additional fasteners. A sealing element can preferably be arranged between the light-guiding body and the support profile. This can provide improved protection against the ingress of dust and dirt.

[0054] In one embodiment, the support profile for backscattering light reflected from the light-entry surface can include a scattering element. In particular, the scattering element can be arranged laterally next to the light source. When light strikes the light-entry surface, a portion of the light, e.g., 10%, can be reflected back towards the light source. The scattering element serves to backscatter the reflected light in the direction of radiation. Specifically, the scattering element can backscatter the light reflected from the light-entry surface in a Lambertian light distribution. This light suppression can be achieved by focusing primary light from the light source within the light-directing element and by total internal reflection of backscattered light within the light-directing element.

[0055] In one embodiment, the luminaire has a color rendering index (CRI) of at least 80, preferably at least 90. The CRI can be determined according to CIE standard 13.3: 1995. A CRI of at least 80, preferably at least 90, enables true-to-life color reproduction and improves the visual perception of illuminated objects. P29240PC00 12.01.2026

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[0057] Another aspect of the present disclosure is to provide a method for manufacturing a light-guiding body, in particular a light-guiding body as described herein.

[0058] The method for manufacturing a light-guiding body comprises the process step of providing a transparent body. The transparent light-guiding body can be cylindrical, spherical, or semicircular. In particular, a transparent body with a convex light-emitting surface can be provided.

[0059] Furthermore, the process for manufacturing a light-guiding body includes the step of creating a recess in the transparent body. Depending on the application, the recess can be created using a milling cutter or a combination of a milling cutter and drill. Milling allows for more precise machining of the body, enabling the creation of more accurate geometries and surface finishes. Compared to other manufacturing methods, such as injection molding or precision grinding, milling is a straightforward process that can be set up and executed quickly. Drilling, on the other hand, allows for rotationally symmetrical machining of the body. The recess can be designed as a hole, a bore, or a groove. In particular, the recess can have a partially concave entry surface for the transparent body. For example, the recess can be formed from two partial recesses.The first partial recess can be formed as a groove or a bore. A second partial recess can then be created, adjoining the first. The first partial recess can be milled using a milling cutter. The second partial recess can be created using P29240PC00 12.01.2026.

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[0061] A rotationally symmetrical diamond milling cutter is used. This allows the partially concave light-entry surface to be manufactured with conventional and uncomplicated manufacturing processes and higher precision.

[0062] Another aspect of the present disclosure relates to a method for manufacturing a lamp, in particular a lamp as described herein.

[0063] The method for manufacturing a luminaire comprises providing semicircular transparent light-guiding elements, in particular semicircular transparent light-guiding elements as described herein. For example, two semicircular transparent light-guiding elements can be provided. A different number of semicircular transparent light-guiding elements is conceivable.

[0064] The process for manufacturing a luminaire further includes the step of providing semicircular support profiles. For example, two semicircular support profiles can be provided. A different number of semicircular support profiles is conceivable. A diffuser can be arranged on the support profiles. Furthermore, a semicircular LED array can be attached to the support profiles.

[0065] The process for manufacturing a luminaire further comprises the process step of inserting the semicircular support profiles into the semicircular transparent light-guiding bodies. The semicircular support profiles are inserted into the recess of the semicircular transparent light-guiding bodies. For example, a semicircular support profile can be inserted into the semicircular transparent P29240PC00 12.01.2026

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[0067] The light-guiding elements are inserted in such a way that the semicircular support profile is arranged along the entire length of the recess, particularly over 180° of the semicircular light-guiding element. The semicircular support profiles form a positive fit with the mounting area of ​​the semicircular transparent light-guiding elements. Preferably, a sealing element can be installed between the support profiles and the light-guiding elements.

[0068] Preferably, the semicircular support profiles can be connected using a profile connector, for example, one profile connector per two ends of the semicircular support profiles to be joined. The profile connector enables a positive and force-fit connection of the semicircular support profiles and ensures stable alignment of the semicircular support profiles relative to each other. Advantageously, the semicircular support profiles can be connected using a spiral tension spring, for example, one spiral tension spring per two ends of the semicircular support profiles to be joined. Spiral tension springs enable an elastic, tension-generating connection of the semicircular support profiles, thereby compensating for tolerances and facilitating the contraction or fixing of the semicircular support profiles.

[0069] The next step in the process for manufacturing a luminaire is to connect the semicircular light-guiding elements with inserted semicircular support profiles. The semicircular light-guiding elements with inserted semicircular support profiles are brought together. After being brought together, the inserted semicircular support profiles can be connected using a connecting element. P29240PC00 12.01.2026

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[0071] To transfer forces between the semicircular support profiles, the semicircular light-guiding elements are connected to inserted semicircular support profiles using a tension element, in particular a coil spring. Tension elements enable a more secure connection of the semicircular support profiles, thereby minimizing mechanical stresses.

[0072] An even stronger and more stable connection can be achieved if, after connecting the semi-circular light-guiding bodies with inserted semi-circular support profiles, the semi-circular support profiles are shifted by half a partial circle, in particular by 90°.

[0073] The described embodiments of the luminaire can serve to carry out the methods according to the invention. The previously described embodiments of the luminaire also disclose correspondingly configured embodiments of the method for manufacturing a light-guiding element or the method for manufacturing a luminaire. The listed process steps are not exhaustive and can also be carried out (if appropriate) in a different sequence.

[0074] BRIEF DESCRIPTION OF THE FIGURES

[0075] Aspects of the invention are explained in more detail with reference to the exemplary embodiments shown in the following figures and the accompanying description. Figures shown: P29240PC00 12.01.2026

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[0077] Fig. 1 A cross-sectional view of an embodiment of a lamp according to the invention;

[0078] Fig. 2 shows an embodiment of a light distribution curve of a luminaire according to the invention;

[0079] Fig. 3 shows a torus-shaped embodiment of a lamp according to the invention in a perspective view;

[0080] Fig. 4 shows the lamp according to the invention from Fig. 3 in an exploded view;

[0081] Fig. 5 shows a cylindrical embodiment of a lamp according to the invention in one embodiment in a perspective view;

[0082] Fig. 6 shows a detail view of Figure 5;

[0083] Fig. 7 shows a spherical embodiment of a lamp according to the invention in one embodiment in a perspective view.

[0084] Fig. 8 shows a cross-sectional view of an embodiment of a lamp according to the invention;

[0085] Fig. 9 shows an embodiment of a light distribution curve of a luminaire according to the invention as shown in Fig. 8.

[0086] The following are examples of the luminaire and its components as disclosed, explained with reference to the figures. P29240PC00 12.01.2026

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[0088] Figure 1 shows a cross-sectional view of a luminaire 1 according to the invention. The cross-sectional view of the luminaire 1 according to Figure 1 represents a cross-sectional view of a torus-shaped, spherical, or cylindrical luminaire. Figure 2 shows an example of a light distribution curve of the luminaire 1 according to the invention.

[0089] The luminaire 1 includes a light source 2. The light source 2 can be a single LED 2 or an LED array 2. In particular, the light source 2 can be mounted on a support. The light source 2 can be switched on or off, but continuous illumination is also conceivable.

[0090] The luminaire 1 further comprises a support profile 3. The support profile 3 is designed to hold the light source 2. Depending on the embodiment, the support profile 3 can be formed from a single element or from several individual elements. The support profile 3 also includes a diffuser 6, which is arranged laterally next to the light source 2. A mounting element (not shown) can be attached to the support profile 3 to install the luminaire 1, for example, on a ceiling.

[0091] The luminaire 1 further comprises a transparent light-directing body 5, through which the light source 2 can shine. The light emitted by the light source 2 can be distributed more precisely by means of the light-directing body 5. The light-directing body 5 surrounds the light source 2 at least partially, in particular to minimize stray light. The light-directing body 5 can preferably be supported by the mounting profile 3. P29240PC00 12.01.2026

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[0093] The light-guiding body 5 can be used to focus and diffuse the light. In particular, the light-guiding body 5 is designed to focus the light to produce an emitted cone of light in a specific direction.

[0094] Figure 2 shows an example of the effect of light control, in particular light focusing. A light distribution curve shows, in particular, a symmetrical light distribution of the emitted light cone in the direction of radiation (here, downwards). Asymmetrical light distributions and other radiation directions are also conceivable. The center of the light distribution curve corresponds to the position of the light source 2. Light control, in particular light focusing, preferably results in a batwing light distribution within the emitted light cone. Light focusing can be described by the opening angle of the light emitted cone or by the emission angle. In Figure 2, the emission angle is chosen to be 65° as an example. Depending on the application, the emission angle can be selected within a range of 20° to 65°.

[0095] Furthermore, the light-directing element 5 is designed to block light from directions outside the emitted light cone. This ensures that light in unwanted directions is specifically reduced to a minimum or completely avoided. This allows for a glare-free view of the luminaire.

[0096] The light source 2 is at least partially surrounded by a translucent gap 7. In particular, the translucent gap is 7P29240PC00 12.01.2026

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[0098] at least partially enclosed by the light-guiding body 5. Air with a refractive index of 1 can be arranged within the irradiated space to selectively influence the properties of the light from the light source 2. Other media are certainly conceivable.

[0099] The light-guiding body 5 can be subdivided into a light-guiding area 5a, a light-blocking area 5b, and a mounting area 5c. The light-guiding area 5a is defined by the spatial area of ​​the light-guiding body 5 in which the light is directed and distributed to achieve the desired lighting effect. For this purpose, the light-guiding area 5a comprises the optical components 8, 9, in particular rounded optical surfaces 8, 9 (e.g., interfaces 8, 9) for light refraction, which are used to direct the light from the light source 2 in the desired direction of emission. The light-blocking area 5b is defined by the spatial area of ​​the light-guiding body 5 in which glare-free viewing of the luminaire 1 is achieved from a viewing angle outside the emitted light cone.The light-blocking area 5b comprises the optical components 8, 9, which are used to minimize or completely prevent the light from the light source 2 from reaching outside the light output cone. This can include surfaces of the light-guiding body 5 where total internal reflection occurs. The light-blocking area 5b is therefore preferably not limited to the area of ​​the light-guiding body 5 shown locally in Fig. 1. The light-blocking area 5b can extend over areas of the light-guiding body 5 that are visible from viewing directions within the blocked angular ranges. In these viewing directions, it is ensured that an observer has neither a direct nor an indirect view of the light source 2. P29240PC00 12.01.2026.

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[0101] Rather, the viewer's perception is influenced by the geometric design and optical properties of the light-directing body 5 in such a way that the light is either deflected within the light-directing body 5, in particular totally reflected, or directed onto surface areas of the light-directing body 5 with negligible or no perceptible luminance. A glare-free appearance of the luminaire 1 can be ensured in the light-blocking area 5b. The mounting area 5c is defined by the spatial area of ​​the light-directing body 5 in which the light-directing body 5 is supported or held.

[0102] The light-guiding body 5 has, at least in the light-guiding area 5a, an optical component in the form of a light-entry surface 8 directed towards the light source 2. The light-entry surface 8 serves as a refractive surface for light coming from the light source 2, passing through the translucent space 7, and striking the light-entry surface 8.

[0103] As can be seen in the cross-sectional view, the light-entry surface 8 has a partially concave contour in the direction of radiation, in particular a concave contour that extends over the entire light-entry surface. With respect to an imaginary circular concave reference contour, the partially concave contour has a flattening in at least one lateral region or lateral part of the light-guiding region 5a. The flattening has a greater bend or smaller radius of curvature in a central region or central part of the light-guiding region 5a. P29240PC00 12.01.2026

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[0105] In addition to the light-intake surface 8, the light-guiding body 5 has, at least in the light-guiding area 5a, a light-emission surface 9, which also serves as a refractive surface. Light that has been refracted by the intake light surface 8 can be refracted again at the light-emission surface 9. In the direction of radiation, the light-emission surface 9 has a convex contour. The convex contour of the luminaire in Figure 1 is a circular convex contour that extends over the entire light-emission surface.

[0106] For improved light focusing, the luminaire 1 acts as a converging lens in at least one lateral part of the light-guiding area 5a (here in the area of ​​the flattened sections) and as a diverging lens in the central part of the light-guiding area 5a (here in the area of ​​the stronger bend). The converging lens effect can be seen in the convergently (here downwardly) refracted light rays L1 in at least one lateral part of the light-guiding area 5a. The diverging lens effect can be seen in the divergently refracted (here slightly laterally deflected) light ray L2 in at least one lateral part of the light-guiding area 5a.

[0107] The light-intake surface 8 and the light-exit surface 9 are, at least in the light-guiding area 5a, rounded optical refraction surfaces 8, 9. The light-intake surface 8 and the light-exit surface 9 are completely rounded optical refraction surfaces. In other words, the light-intake surface 8 and the light-exit surface 9 are shaped without prismatic refraction surfaces. Optically rounded refraction surfaces are easier to manufacture. Furthermore, the light-guiding body 5 has no aperture, in particular no light-absorbing element, and no P29240PC00 12.01.2026

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[0109] A reflective coating is applied to block light. Overall, the design of luminaire 1 is simplified and light utilization is maximized.

[0110] The light-guiding body 5 has a recess 11 in the mounting area 5c for receiving the support profile 3. The support profile 3 is thus arranged in the recess 11 of the light-guiding body 5. Additionally, a sealing element 4 can be arranged between the support profile 3 and the light-guiding body 5. This allows for a positive fit between the light-guiding body 5 and the support profile 3 in the mounting area 5c.

[0111] The light-guiding body 5 can be made of, or comprise, transparent plastic or glass. For example, the light-guiding body can be made of PMMA with a refractive index n=1.49 and an angle of total internal reflection of 42°.

[0112] Figure 1 also shows an axis A, which, depending on the embodiment, represents a mirror axis or a rotation axis.

[0113] Figure 3 shows a torus-shaped luminaire 1a. Mounting elements 10 are attached to the support profile 3 to install the luminaire 1a, for example, on a ceiling or a wall. Mounting elements 10 can include a cable and / or a rope.

[0114] Figure 4 shows the torus-shaped luminaire 1a from Figure 3 in an exploded view, in particular in a connected state of the torus-shaped luminaire 1a. The torus-shaped luminaire 1a has two semicircular transparent light-guiding elements 5. Two semicircular support profiles 3 are also shown. (P29240PC00 12.01.2026)

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[0116] A multitude of semicircular LED arrays 2 and two semicircular diffusers 6 can each be attached to the two semicircular support profiles 3. As can be seen in Figure 4, the semicircular light-directing elements 5 and the semicircular support profiles 3 are arranged offset by 90°. Sealing elements 4 can also be arranged on the mounting area 5c between the light-directing elements 5 and the support profile 3.

[0117] Figure 5 shows an embodiment of the luminaire 1. Figure 6 is a detail view of the luminaire from Figure 5. The luminaire 1b according to Figure 5 is cylindrical. The cross-sectional view of the luminaire 1 from Figure 1 corresponds to the luminaire 1b from Figure 5 in a cross-sectional view (xz-plane). Therefore, axis A from Figure 1 corresponds to a mirror axis of the cylindrical luminaire according to Figure 5. The cylindrical luminaire 1b extends in a Y-direction. Figure 6 shows a detail view of the cylindrical luminaire 1b with support profile 3, sealing element 4, light-guiding body 5, and light source 2.

[0118] Figure 7 shows an embodiment of a spherical lamp 1c. The cross-sectional view of the lamp 1 from Figure 1 also corresponds to a cross-sectional view (xz-plane) through the spherical lamp 1c in Figure 7. Therefore, axis A in Figure 1 corresponds to an axis of rotation for the spherical lamp 1c in Figure 7.

[0119] Figure 8 shows a cross-sectional view of an embodiment of the luminaire 1. The cross-sectional view of the luminaire 1 according to Figure 8 represents a cross-sectional view of a torus-shaped, spherical, or cylindrical luminaire. P29240PC00 12.01.2026

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[0121] The luminaire 1 comprises a light source 2, e.g., an LED 2 or an LED array 2. The luminaire 1 further comprises a support profile 3, which is designed to hold the light source 2. In particular, the luminaire 1 can be mounted, e.g., on a ceiling, by means of a suspension system. A suspension system typically comprises a wire rope with a cylindrical nipple, the cylindrical nipple being held in a clamp. The clamp itself is mounted on the support profile 3. The support profile also includes a diffuser 6, which is arranged laterally next to the light source 2. A translucent, transparent light-directing element 5, through which the light emitted by the light source 2 can be selectively distributed, is preferably supported by the support profile 3.

[0122] Similar to the luminaire shown in Figure 1, the luminaire 1 according to the embodiment shown in Figure 8 can achieve light focusing and light diffusion. The light source 2 is at least partially surrounded by a translucent space 7. In particular, the light-directing body 5 can be divided into a light-directing area 5a, a light-difference area 5b, and a mounting area 5c.

[0123] The light-guiding area 5a comprises optical components 8, 9 for light refraction. By means of the optical components 8, 9, the light from the light source 2 can be directed in a desired direction. The light-guiding body 5 has, at least in the light-guiding area 5a, the optical component 8 in the form of a light-entry surface 8 directed towards the light source 2. Similar to what is described herein, the light-blocking area 5b is preferably not limited to the area of ​​the light-guiding body 5 locally delimited in Fig. 8. P29240PC00 12.01.2026

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[0125] As can be seen in the cross-sectional view, the light-entry surface 8 has at least a partially concave contour in the direction of radiation. With respect to an imaginary circular concave reference contour, the partially concave contour exhibits a flattening in at least one lateral region or lateral part of the light-guiding area 5a. In particular, the flattening in a lateral region of the light-guiding area 5a has a linear partial contour. The light-guiding body 5 has a greater bend or a smaller radius of curvature in a central region or part of the light-guiding area 5a.

[0126] The partially concave contour of the light-entry surface 8, with a linear section in its lateral region, reduces the lateral deflection of the incident light and narrows the angle of incidence. This results in less lateral scattering compared to a completely concave shape, as can be seen in Fig. 8 by the greater downward inclination of the upper light beam L1 compared to Fig. 1, and a stronger focus of the light on the central area of ​​the light-guiding body 5. In combination with the convex light-emission surface 9, this allows for more precise focusing and improved uniformity of the resulting emitted light cone.

[0127] In mounting area 5c, the luminaire 1 has a mounting element 10.

[0128] Figure 9 shows an example of this effect of light guidance, in particular light focusing, in a light distribution curve. The light guidance, in particular light focusing, preferably results in a batwing light distribution within an exit cone. The emission angle is, for example, 96°. Depending on P29240PC00 12.01.2026

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[0130] The beam angle can be selected within a range of 20° to 100°. P29240PC00 12.01.2026

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[0132] LIST OF REFERENCE MARKS

[0133] 1, 1a, 1b, 1c light

[0134] 2 light sources

[0135] 3 Support profile

[0136] 4 sealing element

[0137] 5 light guiding bodies

[0138] 5a Light guidance area

[0139] 5b Light blocking area

[0140] 5c Mounting area

[0141] 6 Scatter source

[0142] 7 spaces

[0143] 8 Light entry area

[0144] 9 Light emission area

[0145] 10 mounting elements

[0146] 11 In-depth study

[0147] Axis

[0148] L1 Light ray (converging lens), convergent light rays; upper marginal ray

[0149] L2 light beam (diffusing lens), divergent light rays

Claims

P29240PC00 12.01.2026 27 / 32 PATENT CLAIMS 1. Luminaire (1) comprising a. a light source (2); b. a day profile (3); c. a transparent light-guiding body (5) which is at least partially traversable by the light source (2) and which at least partially surrounds the light source (2), wherein the light-guiding body (5) is configured i. to cause a focusing of light to produce an exit cone of light in a direction of radiation; and ii. to cause light blockage for directions outside the exit cone of light.

2. Luminaire (1) according to claim 1, wherein the light focusing produces a batwing light distribution within the emission cone, in particular an emission cone with a radiation angle in a range of 20° to 100°, in particular in a range of 20° to 65°.

3. Luminaire (1) according to one of the preceding claims, wherein the light source (2) is at least partially surrounded by a translucent space (7), and the translucent space (7) is at least partially enclosed by the light-guiding body (5). P29240PC00 12.01.2026 28 / 32 4. Luminaire (1) according to one of the preceding claims, wherein the light-guiding body (5) has at least in a light-guiding area a light-entry surface (8) directed towards the light source (2) and a light-emission surface (9).

5. Luminaire (1) according to claim 4, wherein the light entry surface (8) has a partially concave contour in a cross-sectional view.

6. Luminaire (1) according to claim 5, wherein the partially concave contour of the light entry surface (8) has a flattening in at least one lateral area of ​​the light guiding area with respect to a circular concave contour, in particular wherein the lateral area comprises a linear and / or circular partial contour.

7. Luminaire (1) according to one of claims 4 or 5, wherein the light emission surface (9) has a convex contour in a cross-sectional view, in particular a circularly convex contour.

8. Luminaire (1) according to one of the preceding claims, wherein the light-guiding body (5) acts as a converging lens in at least one lateral light-guiding area and as a diverging lens in a central light-guiding area.

9. Luminaire (1) according to one of claims 4 to 8, wherein the light entry surface (8) and the light exit surface (9) are rounded, in particular completely rounded, optical refraction surfaces (8, 9) at least in the light steering area.

10. Luminaire (1) according to any one of claims 4 to 9, wherein the light-intake surface (8) and the light-emitting surface (9) are shaped free of prismatic refraction surfaces. P29240PC00 12.01.2026 29 / 32 11. Luminaire (1) according to one of the preceding claims, wherein the luminaire (1), in particular the light-guiding body (5), is free of apertures and / or reflective coated surfaces for light blocking.

12. Luminaire (1) according to one of the preceding claims, wherein the light-guiding body (5) comprises or consists of transparent plastic, in particular polycarbonate, or glass, in particular crown glass or quartz glass.

13. Luminaire (1) according to one of the preceding claims, wherein the luminaire (1) is torus-shaped, cylindrical or spherical.

14. Luminaire (1) according to one of the preceding claims, wherein the light-guiding body (5) is held in a mounting area (5c), in particular in a mounting area (5c) above the light source (2), and has a recess (11) in which the support profile (3) is arranged.

15. Luminaire (1) according to one of the preceding claims, wherein the light guiding body (5), in particular at a part of the mounting area (5c), forms a positive fit with the support profile (3).

16. Luminaire (1) according to one of claims 4 to 15, wherein the support profile (3) comprises a diffusing body (6) for backscattering light reflected at the light entry surface (8), in particular that the diffusing body (6) is arranged laterally next to the light source (2).

17. Luminaire (1) according to one of the preceding claims, wherein the luminaire (1) has a color rendering index of at least 80, preferably at least 90. P29240PC00 12.01.2026 30 / 32 18. Method for manufacturing a light-guiding body (5), in particular a light-guiding body (5) for a luminaire (1) according to one of the preceding claims, comprising the following method steps a. Providing a transparent body with a convex light-emitting surface; b. Providing a depression (11) in the transparent body which includes a partially concave light entry surface (8) for the transparent body.

19. Method according to claim 18, wherein the creation of the recess (11) comprises milling a groove or drilling a bore in the transparent body, and / or the creation of the recess (11) comprises milling a partially concave light entry surface (8) for the transparent body using a rotationally symmetrical diamond cutter.

20. Method for manufacturing a lamp (1), in particular a lamp (1) according to any one of claims 1 to 17, comprising the following method steps: a. Providing semicircular transparent light-guiding bodies (5), in particular manufactured according to one of claims 18 or 19; b. Provision of semicircular support profiles (3); c. Inserting the semicircular support profiles (3) into the semicircular transparent light-guiding bodies (5); and P29240PC00 12.01.2026 31 / 32 d. Connecting the semicircular light-guiding bodies (5) to the inserted semicircular support profiles (3).

21. Method according to claim 20, wherein in step d. the semicircular support profiles (3) are connected by means of a tension element.

22. Method according to claim 20 or 21, wherein after connecting the semicircular light guiding bodies (5) with the inserted semicircular support profiles (3) the semicircular support profiles (3) are displaced by half a semicircle, in particular by 90°.

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