EP2650597A2 - Eclairage - Google Patents

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Publication number
EP2650597A2
EP2650597A2 EP13001778.3A EP13001778A EP2650597A2 EP 2650597 A2 EP2650597 A2 EP 2650597A2 EP 13001778 A EP13001778 A EP 13001778A EP 2650597 A2 EP2650597 A2 EP 2650597A2
Authority
EP
European Patent Office
Prior art keywords
light
led
collimator optics
reflector
collimator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP13001778.3A
Other languages
German (de)
English (en)
Other versions
EP2650597A3 (fr
Inventor
Matthias Bremerich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Erco GmbH
Original Assignee
Erco GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erco GmbH filed Critical Erco GmbH
Publication of EP2650597A2 publication Critical patent/EP2650597A2/fr
Publication of EP2650597A3 publication Critical patent/EP2650597A3/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a luminaire for attachment to a ceiling of a building space and for illuminating a floor surface or a building part surface.
  • LED's have replaced conventional light sources such as HIT or QT lamps as light sources.
  • conventional light sources such as HIT or QT lamps.
  • the light emitted by the LED generally over a fairly large solid angle range of 180 ° usable for architectural lighting, considerable development efforts have already been made by the applicant.
  • the object of the invention is to develop a luminaire, which can be used as a downlight, and allows for a simple structure an optimized light distribution.
  • the invention accordingly relates to a luminaire for attachment to a ceiling of a building room.
  • the luminaire according to the invention can be used in particular as a downlight, z. B. be designed as recessed luminaire or surface-mounted.
  • a building space within the meaning of the invention is also understood, for example, a building ceiling covered or partially covered outdoor space.
  • the luminaire according to the invention can be arranged on ropes or supporting structures or fixed on a lamppost.
  • the luminaire is used to illuminate a floor area or part of a building. It should be noted that, for example, displays, artwork or the like can be illuminated by the lamp.
  • the luminaire comprises at least one LED which has at least one light emission surface.
  • a single LED is provided.
  • an LED array for example, a multi-chip LED is provided, or a plurality of LEDs.
  • the LED or LED arrangement optionally has a plurality of light emission surfaces in this latter case.
  • the lamp comprises a collimator optics. This is provided by a separate from the LED component.
  • the collimator optics is advantageously spaced apart, even if only slightly spaced, from the LED.
  • the collimator optics serve to adjust the opening angle, i. H. to reduce the angle at which light is emitted from the LED.
  • the light beams therefore leave the light exit surface of the collimator optics with a smaller opening angle or angle than the opening angle at which the light beams have left the LED.
  • the collimator optics is designed and positioned such that its light entry surface overlaps the light emission surface.
  • the light entry surface of the collimator optics completely or substantially completely overlaps the light emission surface. In the event that lower light losses can be tolerated, it is also possible and encompassed by the invention if the light entry surface of the collimator optics only predominantly overlaps the light emission surface.
  • the collimator optics has a beam angle between 40 ° and 120 °.
  • the radiation angle between 45 ° and 120 °, more advantageously between 50 ° and 120 °, more advantageously between 55 ° and 120 °, more advantageously between 60 ° and 120 °, more advantageously between 65 ° and 120 °, further advantageously between 70 ° and 120 °, more advantageously between 75 ° and 120 °.
  • the inventive feature of the invention is thus expressed in that, although a collimator optics is used. However, this bundles the light flux emitted by the LED only slightly, namely to a reduced radiation angle between 40 ° and 120 °.
  • This emission angle or opening angle allows in a particularly advantageous manner to use the collimator in a lamp to be arranged on the ceiling, z.
  • emission angles are advantageous in that they allow the downlighting and emission characteristics to be achieved directly without the need for a reflector.
  • the radiation angle in the range between 40 ° and 120 ° can be achieved in this way, for example, that without the need to use a Darklight reflector, a darklight radiation characteristics of the lamp is achieved.
  • the darklight technology makes it possible to achieve a light distribution such that light emitted by the luminaire is incident only in a predetermined area of the room to be illuminated, but not in a room area that can be labeled as a shielding room. If a person is inside the screening room, the person is virtually invisible or discernible by this person. In particular, a person located in the shielding space can neither directly recognize the light source nor a mirror image of the light source in the visible reflector sections.
  • a significant feature of the luminaire according to the invention is the fact that the collimator optics can have a very large diameter, for example 22 mm.
  • This outer diameter in the region of the light exit surface of the collimator optics (see reference character D, z. In Fig. 6 ) is significantly larger than the diameter of prior art collimator optics.
  • With such large diameters are very narrow light distributions, ie, for example, radiation angle ⁇ in the range of only 8 ° possible.
  • the collimator optics is used only to achieve a much larger radiation angle ⁇ between 40 ° and 120 °.
  • This adaptation makes possible a light distribution optimized for a downlight.
  • the solid angle range in which light emitted by the collimator optics falls is considered as the emission angle, wherein this observation takes place without taking into account any dimming elements or reflectors which may still be arranged in the light path between the collimator optics and the building surface to be illuminated.
  • the emission angle into which light is radiated into from the light exit surface of the collimator optics.
  • Stray light losses which can occur, for example, due to not entirely exclude reflections at edges or edge regions of optical interfaces, are also not taken into account in this consideration.
  • the scattered light components are only completely insignificant components of the total luminous flux and are less than 10%, advantageously less than 5%, more advantageously less than 3% of the total luminous flux emitted by the light exit surface of the collimator optics.
  • a reflector is arranged in the main emission direction of the light behind the collimator optics. Nevertheless, the invention also encompasses a luminaire which manages without such a reflector.
  • an opaque dimming element arranged behind the collimator optics in the main emission direction of the light can be arranged.
  • This may, for example, also be an element which is provided with a matt white inner side.
  • Such Abblendelement can serve to fade only completely insignificant stray light components.
  • the luminaire according to the invention can also be equipped with a darklight reflector arranged in the main emission direction of the light behind the collimator optics.
  • the Abblendelement free edges which surround a light exit opening of the lamp.
  • the marginal edges are arranged and positioned so that they are substantially adjacent to the emission angle.
  • the collimator optics thus dictates the angle of the light.
  • the Abblendelement is then configured in knowledge of the beam angle so that it is brought up to the beam angle.
  • the invention further relates to a luminaire according to claim 2.
  • the invention is equally based on the object, starting from the DE 10 2008 063 369 A1 the Applicant further develop the lamp described therein such that it is also suitable for use as a downlight, and has a simplified structure.
  • the luminaire according to the invention accordingly has at least one LED with a light emission surface, a collimator optics, and a reflector.
  • the collimator optics is equipped with a light entry surface and a light exit surface. The light entry surface of the collimator overlaps the light emission surface. The light exit surface of the collimator optics is positioned such that it projects into the interior of the reflector, or rests against the interior.
  • the LED's a Associate collimator optics, and, without the use of reflectors, the light emitted from the light exit surface of the collimator optics directly to a surface to be illuminated.
  • the photometric principle according to the invention according to which the light emitted by the LED is first collimated by a collimator optics, and the collimated light is radiated into a reflector, enables new luminaire geometries with a simple construction and the achievement of optimum light distribution.
  • the reflector can be equipped, for example, with a matt, white inner surface, and so far only serve as a screening element. This is sufficient, for example, if only insignificant, negligible scattered light components are to be filtered out by this reflector. In these embodiments, the reflector has so far only the function of a screening element.
  • the reflector may be mirrored, in particular sharkaptnd formed.
  • the reflector can also be designed as a darklight reflector.
  • the diameter D is the collimator optics in the order of magnitude of 22 mm, that is to say a much narrower emission characteristic, ie a smaller emission angle ⁇ would be permitted, than provided according to the invention.
  • the collimator optics on a beam angle between 40 ° and 120 ° can generate a light distribution optimized for a downlight.
  • the radiation angle between 45 ° and 120 °, more advantageously between 50 ° and 120 °, more advantageously between 55 ° and 120 °, more advantageously between 60 ° and 120 °, more advantageously between 65 ° and 120 °, further advantageously between 70 ° and 120 °, more advantageously between 75 ° and 120 °.
  • the reflector has a special dimensioning and positioning.
  • the reflector has marginal edges, which experience a special positioning.
  • the marginal edges are those edges of the reflector that surround the light exit opening of the lamp, thus the marginal edges closest to the surface to be illuminated.
  • the marginal edges are positioned so that they are substantially adjacent to the beam angle.
  • the beam angle is in turn given by the collimator optics in this luminaire.
  • the fact that the marginal edges of the reflector adjoin the predetermined radiation angle, on the one hand ensures that only the unwanted scattered light is dimmed.
  • the directed, d. H. the bundled light components that are within the radiation angle, unhindered through.
  • the reflector may surround the light exit surface of the lamp substantially annular, the cross section of this ring may be arbitrarily designed.
  • the reflector may be rotationally symmetrical.
  • the reflector element is formed asymmetrically with respect to an optical axis in the circumferential direction.
  • the luminaire may also have a plurality of reflectors and / or a plurality of collimator optics.
  • a plurality of reflectors and / or a plurality of collimator optics For example, there is the possibility of a grid-like arrangement of multiple LED's, z. B. of four LEDs, or of four LED arrangements (multi-chip LEDs) to provide.
  • a number of reflectors and / or a number of collimator optics may be provided. As a result, particularly bright lights can be achieved. This also makes it possible to make the lamp scalable.
  • a plurality of reflectors are provided by a common component. It can also be provided that only some of the multiple reflectors are provided by a common component.
  • a plurality of collimator optics are provided by a common component, or that at least some of the plurality of collimator optics are provided by a common component.
  • the collimator optics consists for example of plastic, and is designed as an injection molded part. In this respect, it makes sense to provide a plurality of collimator optics, provided that a plurality of collimator optics are provided in a luminaire, by a single injection-molded part.
  • the lamp is provided with a substantially circular light exit opening.
  • four collimator optics can be provided, with the further special feature that each collimator optics is associated with a quarter circle segment-like reflector element.
  • Each reflector element has so far, cake piece-like, two reflector sections which are at a right angle to each other, and a curved, circular arc-like Reflector segment, which connects the free leg ends of the straight reflector elements together.
  • the LED is part of an LED arrangement which has a plurality of LEDs.
  • a collimator optics can insofar overlap an LED arrangement which contains a plurality of LEDs and / or a plurality of light emission surfaces.
  • each LED or each LED arrangement can be assigned its own reflector and / or its own collimator optics.
  • a plurality of collimator optics may be arranged along a straight line to form an elongated luminaire.
  • the collimator optics (as well as the plurality of reflectors and the plurality of LED's or LED arrays) may be arranged along a grid comprising rows and columns.
  • an additional, further reflector to be arranged behind the reflector in the light path of the light emitted by the LED. This can serve to influence the light distribution, and be provided, for example, to achieve a narrow emission or a broadly emitting light distribution.
  • the light exit opening of the luminaire can be penetrated by a cover glass.
  • the light exit opening of the lamp is spaced from a free edge of the Abblendiatas or the reflector at a distance.
  • an aesthetically advantageous embodiment of the luminaire can be achieved.
  • This, not shown in the drawings variant of the invention is for example advantageous if in the main direction of the light behind the reflector another additional reflector is arranged.
  • the invention further relates to a collimator optics for at least one LED.
  • this invention relates to a collimator optic suitable for use in a luminaire of the type described above.
  • Known collimating optics have light entry surfaces and light exit surfaces which are designed in a special way to capture, bundle and output the light emitted by the LED in a bundled manner. As already described at the outset, it is essentially the objective of known collimator optics to achieve the lowest possible radiation angle (so-called opening angle), which can be achieved in the range of a few degrees, e.g. B. of 8 ° lie.
  • the collimator optics of the prior art are generally formed following the principle of optical, physical lenses. These may be, for example, concave-convex, plano-convex, or double-convex lenses. It is essential that the collimator optics works in total as a converging lens.
  • the light exit surface of the collimator optics that is to say the interface which faces away from the LED or the LED arrangement, is usually formed either as a plane or a total of spherically curved surface.
  • the object of the invention is therefore a known per se collimator optics of the prior art, as for example from the German patent application DE 10 2008 063 369 A1
  • the applicant is known to develop such that it is suitable for use in a luminaire for ceiling-mounted.
  • the special feature is the arrangement of axially elongated bulges in the light exit surface of the collimator optics. Such bulges or granulations can be particularly advantageous if a plurality of such curvatures, parallel to each other, are arranged on the light exit surface.
  • These surface formations are a one-piece cohesive component of the collimator optics. In the case of a collimator optics designed as a plastic injection-molded part, these surface formations are molded directly on.
  • the bulges may be provided by cap portions of a torus.
  • a torus is known to be an annular body having an inner radius and outer radius related to the central axis, the cross section of the torus being formed by a circle having a third radius. About these three radii can be a torus or a Toruskappenabêt uniquely determined.
  • the light distribution provided by the collimator optics can be optimized accordingly.
  • a light distribution can be achieved that is streak-free, and thus substantially homogeneous.
  • the invention further relates to a collimator optics according to claim 14.
  • the collimator optics has a light entry surface and a light exit surface, wherein the collimator optics with respect to an optical axis, ie the central axis, the collimator optics, is formed asymmetrically.
  • the light entry surface of the collimator optics and the light exit surface of the collimator optics may have curvatures which are approximated to ellipses or ovals or provided by them. As a result, non-rotationally symmetric light distributions can be generated.
  • the light entry surface of the collimator optics has a cavity which has a bottom wall and a side wall.
  • the cavity, in which the LED is used can be limited for example by tapered side walls and a flat or curved floor surface.
  • the side wall when viewing a cross section through the collimator optics along a plane whose normal vector is formed by the optical axis, the side wall, but possibly also the bottom wall, can have an elliptical, an oval or at least a curvature deviating from a circular shape.
  • the invention further relates to a collimator optics according to claim 15.
  • the luminaire designated in its entirety in the figures with 10 is first explained with respect to its lighting technology, essential to the invention construction.
  • FIG. 1 is - wherein the sake of clarity essential parts of the lamp, such. As the housing, have been omitted - the lamp equipped with an LED 11, a collimator 12 and a reflector 13.
  • the collimator optics can be made, for example, as a plastic injection-molded part made of transparent plastic and has a number of interfaces for refraction of light, and for achieving total reflection.
  • the collimator optics comprises a head portion 14, a middle portion 15 and a foot portion 16.
  • the head portion 14 provides a cavity 17 into which the LED 11 projects with its LED light emitting surface 42.
  • the cavity 17 has a concavely curved bottom wall 18, as well as substantially circular cylindrical side walls 19.
  • the side walls 19 may be conical in view of the cross section and run towards the bottom surface 18.
  • the collimator optics 12 is rotationally symmetrical in this embodiment with respect to an optical axis OA.
  • the boundary surfaces 18, 19 of the cavity 17 together provide the light entry surface 20 of the collimator optics 12.
  • the collimator optics 12 has a total reflection surface 21 in the region of its head section 14. Some of the light components emitted by the LED 11 are totally reflected at this surface 21.
  • connection plate 22 can be seen, which belongs to the middle section 15 of the collimator optics 12.
  • the plate 22 has a wall thickness W, and is in its central central portion, which is traversed by light, photometrically meaningless.
  • the connection plate 22 can assume mechanical functions, for example, provide a contact surface for the upper edges of the reflector edges 37a, 37b.
  • connection plate 22 On the other hand, as later with reference to the embodiment of Fig. 6 becomes clear, on the connection plate 22 and a connection of mounting feet or attachment stub 39a, 39b done, with the aid of an attachment of the collimator 12 directly or indirectly to the in the Fig. 1 and 6 housing, not shown, of the lamp 10 can be made. Finally, via the connection plate 22, a mechanical connection of this collimator optics 12 to adjacent, not shown, collimator optics can take place, so that a plurality of collimator optics for a plurality of LEDs can be formed by a common component.
  • the collimator optics 12 finally has a light exit surface, which is designated by 23.
  • Fig. 1 The LED 11 emits light along its light emission surface 42 along a solid angle of 180 ° (see angle ⁇ ).
  • the collimator optics 12 leads to a bundling of these light beams to a reduced opening angle or radiation angle ⁇ , which in the embodiment according to FIG Fig. 1 about 114 °. In other embodiments, this radiation angle can be between 40 ° and 120 °.
  • a measurement of this radiation angle ⁇ basically takes place between the two outermost edge beams 36a and 36b.
  • a collimator optics 12 can be designed to achieve a particular, desired beam angle ⁇ .
  • the construction of the collimator optics was carried out essentially in such a way that the outermost edge beam, that is to say in the exemplary embodiment of FIG Fig. 1 the marginal ray 36a, which just passes through the bottom surface 18 of the cavity 17, and yet does not pass through the side surface 19 of the cavity, the radiation angle ⁇ dictates.
  • the radiation angle ⁇ dictates.
  • At the total reflection surface 21 reflected rays are all reflected such that they lie within the radiation angle ⁇ .
  • Fig. 1 there is an emission angle ⁇ of the collimator optics which is significantly smaller than the emission angle ⁇ of the LED 11.
  • Fig. 2 shows the embodiment of the lamp of Fig. 1 with schematically illustrated ceiling 25, in which a cavity 26 for installation of the lamp 10 is located.
  • the luminaire housing 27 is indicated only by dashed lines. Electrical leads 28a, 28b, as well as not illustrated signal supply lines can supply the lamp with operating voltage and information.
  • a cooling element 30 may be provided adjacent to the board 29 and dissipate the generated heat.
  • a connecting line VL between the lower reflector edge 38a and the obliquely opposite upper edge 37b of the opposite reflector segment as a result of rotation about the optical axis OA forms a cone having an opening width with an opening angle ⁇ .
  • the opening angle ⁇ is in the embodiment of Fig. 2 slightly larger than or as large as the radiation angle ⁇ of the collimator 12th
  • the reflector 13 has a special contour, and is designed as a so-called darklight reflector.
  • a space region 33 results, which can be designated as a shielding space and into which neither direct nor indirect light falls.
  • a person 34a located in the shielding space 33 does not directly see the light source, ie the light exit surface 23 of the collimator optics 12, nor a mirror image of the light source on the reflector 13.
  • the user represented by the position of the user 34b in the space to be illuminated 32, in the direct and indirect, ie reflected at the reflector 13 light components, fall into it.
  • the bottom surface 31 is to be illuminated.
  • the embodiments of the 4 and 5 show lights with a circular or square cross-section.
  • four collimator optics 12a, 12b, 12a, 12d are provided, which are each surrounded by a quarter-circle-shaped reflector 13a, 13b, 13c, 13d.
  • the reflector 13a It should be explained with reference to the reflector 13a that it consists of three reflector segments 35a, 35b, 35c. The two aligned along a straight line reflector segments 35b and 35c are at right angles to each other and are connected by the curved reflector segment 35a together.
  • collimator optics 12a, 12b, 12c, 12d are provided, which are each surrounded by a square, annular reflector 13a, 13b, 13c, 13d.
  • the collimator optics 12d the Fig. 6 has a height H, an outer diameter D, an inner diameter ID and a width (MHB) of the cavity 17, that is, a clear width.
  • the bottom surface 18 of the cavity 17 is convexly curved, and the side wall portions 19 of the cavity 17 are inclined so that the cavity 17 is tapered in cross section. Again, sidewall portions 19 and bottom wall 18 together provide the light entry surface 20 of the collimator optics 12.
  • the light exit surface 23 is again convex in this embodiment.
  • the central light components emanating from the LED 11 and the light emission surface 42 are bundled as a result of double refraction at the bottom surface 18 and the light exit surface 23 to a light beam with the opening angle ⁇ (beam angle).
  • the outer or peripheral, outgoing from the LED light portions 11 are deflected by reflection at the total reflection surface 21, which is curved when viewing its cross-section, and after further refraction at the light exit surface 23, in a solid angle within the opening angle ⁇ . In this way, as in the previously described embodiment of the Fig. 1 achieved a reduction of the opening angle or beam angle.
  • the reflector 13 has in the embodiment of Fig. 6 - taking into account the presentation of the Fig. 5 - Each four reflector segments 13a, 13b, 13c, 13d on.
  • the re Fig. 6 left reflector segment 35d has an upper peripheral edge 37a and a lower peripheral edge 38a.
  • the re Fig. 6 Right reflector segment 35b has an upper peripheral edge 37b and a lower peripheral edge 38b.
  • Fig. 6 indicates that the arrangement of the reflector 13 in a lamp 10 according to Fig. 6 is not necessary per se, since the reflector 13 is positioned and dimensioned such that the lower marginal edges 38a, 38b at the beam angle ⁇ , that is, at the light beam located within the beam angle, zoom. However, there is no reflection of light rays at the reflector 13. He is so far from the lighting point of view not required.
  • the function of the reflector 13 in the embodiment of Fig. 6 is limited only to the one Abblendimplantations to Stray light components, which are anyway extremely low, exclude.
  • a highly efficient light emission of the luminaire becomes possible.
  • Such a lamp can entirely without reflectors, in principle, entirely without Abblendimplantation get along.
  • Such a collimator optics can be used advantageously in luminaires for mounting on the ceiling, since in this way the desired high visual comfort can be achieved.
  • Fig. 6 (as well as the embodiments of the Fig. 4 and 8th , as far as this is a collimator optics 12 according to Fig. 6 use) each show a substantially rotationally symmetric light distribution. This is based on the Fig. 7 shown in polar coordinates. One recognizes a light distribution which is essentially constant within the emission angle ⁇ .
  • the embodiments of the 8 and 9 come the embodiments of the 4 and 5 very close to the basic principle.
  • 12 special structures in the form of axially, in the direction of the double arrow Y, elongated cambers 40 are provided on the light exit surface 23 of the collimator.
  • the surface 41 of a camber 40 is, as viewed in the cross section of the camber 40 according to Fig. 10 , continuously curved, in particular spherically or aspherically curved.
  • collimator optics 12 it may be provided to form them around the optical axis OA in deviation from a rotational symmetry.
  • an oval or elliptical basic shape can be provided, resulting from the FIGS. 12 and 13 results.
  • the side wall portions 19 of the cavity 17 may have a contour which deviates from a circular shape.
  • the total reflection surface 21 and the bottom surface 18 of the cavity 17 may have a corresponding oval or elliptical contour.
  • the light emission surface 23 may have an edge contour K, which corresponds to the contour of the side wall surface 19, and may be formed equally oval.
  • the corresponding opening angle is here for the sake of simplicity designated ⁇ .
  • the narrower opening angle when viewing a direction of the double arrow Y is denoted by ⁇ in this embodiment.
  • the collimator optics 12d in the embodiment of the Fig. 10 and likewise the collimator optics 12d of the embodiment of FIG Fig. 6 may have circular cross-sections, that can generate rotationally symmetric light distributions, or alternatively may have deviating from a circular cross-sections, as shown in the FIGS. 12 and 13 are shown.
  • the collimator optics can be used with different, selectable radiation angles ⁇ between 40 ° and 120 ° and optionally for achieving rotationally symmetric or non-rotationally symmetrical light distributions.
  • a plurality of collimator optics with the same height H and / or the same outside diameter D and / or the same diameter ID and / or the same minimum cavity width MHB and / or the same position or the same position grid P can be equipped by fastening elements 39, so that only by replacing a collimator optics without leaving any remaining parts of the luminaire have to be changed, a changed desired light distribution is achievable.
  • the interior 43 of the reflector in all embodiments is free of lighting elements.
  • the collimator optics 12 in each case projects with its light exit surface 23 into the interior space 43 or adjoins it.
  • the optical axis OA is usually referred to as the central axis of the collimator optics, that is, as the axis that passes through the center of gravity or near the center of gravity and provides a kind of optical center of gravity.
  • optical axis is typically the geometric center between two attachment members 39a, 39b or between two opposing reflector segments 35d, 35b.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP13001778.3A 2012-04-10 2013-04-08 Eclairage Pending EP2650597A3 (fr)

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DE102015207987A1 (de) * 2015-04-30 2016-11-03 Zumtobel Lighting Gmbh Leuchtvorrichtung
EP3404312A4 (fr) * 2016-01-16 2019-06-12 Modulex Inc. Appareil d'éclairage
AT16514U1 (de) * 2016-01-29 2019-11-15 Zumtobel Lighting Gmbh Optisches System zum Beeinflussen der Lichtabgabe einer Lichtquelle

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EP3438524A1 (fr) 2017-08-02 2019-02-06 ERCO GmbH Luminaire
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