EP2910844B1 - Optical Reflectors and illumination device - Google Patents

Optical Reflectors and illumination device Download PDF

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Publication number
EP2910844B1
EP2910844B1 EP14156324.7A EP14156324A EP2910844B1 EP 2910844 B1 EP2910844 B1 EP 2910844B1 EP 14156324 A EP14156324 A EP 14156324A EP 2910844 B1 EP2910844 B1 EP 2910844B1
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EP
European Patent Office
Prior art keywords
light coupling
light
coupling element
optics
twenty
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EP14156324.7A
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German (de)
French (fr)
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EP2910844A1 (en
Inventor
Dennis MÖLLER
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Lunux GmbH
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Hella KGaA Huek and Co
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Classifications

    • 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
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • 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
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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
    • F21V7/0058—Reflectors for light sources adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular

Definitions

  • the invention relates to an optic and a lighting device, as used for example in decorative lights.
  • the invention relates to optics and a lighting device for mushroom lights, which are provided to illuminate squares, promenades or streets.
  • Known refractive optics and lighting devices with such optics in which the light is coupled from a plurality of light sources via an end face in a substantially annular body.
  • light coupling elements are provided on the front side.
  • the light-coupling elements bundle the light emitted by the light sources so that it strikes substantially parallel to a deflecting surface formed as a light-outcoupling surface.
  • the deflecting surface which is formed by a relation to a longitudinal central axis of the optic body as a truncated conical employed inner lateral surface, then deflects the light in the direction of a cylindrical outer circumferential surface of the optic body.
  • the outer circumferential surface of the optic body defines a light exit surface.
  • the deflection of the light at the light outcoupling surface takes place at an angle of 90 °, wherein the light strikes the outcoupling elements essentially parallel to the lateral surface and is then emitted at an angle of 90 ° to the longitudinal central axis.
  • Such optics are used for example in signal lights use.
  • Generic optics are from the DE 20 2006 019 347 U1 and the FR 2 936 297 A1 known. In each case, it is provided that a plurality of identically formed light coupling elements are arranged regularly distributed on the circumference of an end face of the optics.
  • the object of the present invention is to provide a refractive optical system for a lighting device and the lighting device, which can be used for illumination purposes.
  • a given area be illuminated as homogeneously as possible.
  • a first homogeneous light distribution and a second light distribution should moreover be provided with a single optic.
  • the optical system according to the invention has the features of claim 1.
  • the particular advantage of the invention is that a high homogeneity in the light distribution is provided by the shaping of a Abstrahlkegels.
  • the luminous flux of the light sources is thus distributed in the optics and the surface to be illuminated can be illuminated substantially homogeneously.
  • the light coupling elements are distributed annularly on the circumference at the first end face and are provided adjacent to the jacket side serving as light exit surface.
  • trough-shaped recesses may be provided on the light coupling elements, wherein the trough-shaped recess defines a serving as a light coupling surface, optically effective first boundary surface.
  • the light sources may be formed in the manner of light-emitting diodes and in any case may be provided in sections in the region of the trough-shaped recess.
  • the first boundary surface may have a plurality of partial surface, wherein the light incoupling surface or each individual partial surface may in any case be continuously curved in sections.
  • the light incoupling surface can in any case be convexly curved in sections.
  • the light coupling elements can be formed separately and in particular formed drop-shaped.
  • the light coupling elements can have an approximately elliptical cross section perpendicular to the optical axis.
  • a shell-side boundary surface of the optical elements may in this case be formed as a second optically effective boundary surface.
  • the second optical boundary surface may be designed in the manner of a total reflection surface such that at least part of the light coupled in via the light coupling surface is totally reflected when it strikes the second boundary surface.
  • the light striking the second boundary surface is totally reflected in the direction of the light outcoupling surface.
  • the light output coupling elements provided on the light output surface can, for example, be realized in the manner of a circumferential or annular prism structure.
  • a flank angle of the prism structure may be determined relative to the longitudinal center axis of the optics such that light coupled in via the light coupling elements is totally reflected in the direction of the light exit surface when it strikes the prism structure.
  • the light coupling elements may be provided relative to the light output surface or the light coupling elements provided thereon in any case for the most part directly or after the total reflection on the second boundary surface of the Lichteinkoppel implant on the Lichtauskoppel composition, and that only a small part of the coupled Light directly or after the total reflection on the second boundary surface strikes the light exit surface, without having been deflected at the light outcoupling surface.
  • At least two different light coupling elements are provided with regard to their shape.
  • the light coupling elements differ with respect to the design of the first optically effective boundary surface or the second optically effective boundary surface.
  • a wide variety of different light distributions can be provided. For example, a square or rectangular area can be homogeneously illuminated. In this case, a lot of light is directed in the direction of the corners of the illumination surface.
  • At least one narrow-emitting light coupling element which forms a narrow emission cone with an opening angle of 40 ° +/- 5 °. Furthermore, at least one broadly emitting light coupling element with a wide emission cone and an aperture angle of 70 ° +/- 5 ° relative to the optical axis of the light coupling element is provided.
  • light coupled into the optics via a narrowly emitting light coupling element can illuminate the corners of a square or rectangular illumination surface, while the broadly emitting light coupling elements deflect the light less widely, but more widely.
  • the recess is at least partially formed shell-shaped.
  • the limiting surface of the recess acting as light output surface is bent.
  • the homogeneity of the illumination advantageously improves by the provision of the curved light exit surface. It is insofar provided a high-quality light distribution, wherein the light is deflected so that it is emitted laterally and downwardly in a mounting position of the optics.
  • the flank angle of the prismatic structure is designed to be spatially variable.
  • the prism structure is made less steep in front of the narrowly radiating light coupling elements than the same prism structure in front of the broadly emitting light coupling elements.
  • the flank angle formed between the prism structure and the central axis is formed sharper or smaller than in front of the narrowly emitting light coupling elements in front of the broadly radiating light coupling elements.
  • the transition from the steep flank angle to the less steep flank angle can be carried out in particular continuously.
  • a range of the optics can be varied. It is so far that the light distribution can be influenced via the light output elements with the location-variable flank angle.
  • the continuous change of the flank angle favors, on the one hand, a homogeneous illumination and, on the other hand, avoids steps or jumps which are as bright or dark areas in the light distribution can be perceived.
  • the illumination device comprises an optical system according to one of claims 1 to 8 and a plurality of light-emitting diodes as light sources, wherein each light emitting diode is associated with a Lichteinkoppelelement and wherein a number of light-emitting diodes is less than a number of Lichteinkoppelemia the optics.
  • each light emitting diode is associated with a Lichteinkoppelelement and wherein a number of light-emitting diodes is less than a number of Lichteinkoppelemia the optics.
  • twenty-eight light coupling elements and fourteen light-emitting diodes may be provided, wherein in a first operating configuration of the lighting device a light-emitting diode is provided on every second light coupling element and wherein in a second operating configuration the light sources are provided non-uniformly on the light coupling elements.
  • the particular advantage of the invention is that by providing a plurality of light coupling elements a variable equipping the same with light sources is possible.
  • a variable equipping the same with light sources is possible.
  • different light distributions can be provided when using the same optics.
  • a symmetrical light distribution can be provided, which is advantageously used in decorative lamps which are provided to illuminate a parking area in a planar manner.
  • the non-uniform arrangement of the light sources can provide an asymmetrical light distribution, in particular a one-sided light distribution. This light distribution is advantageous in the use of the lighting device for illuminating streets, promenades or the like.
  • An optical system 1 according to the invention Fig. 1 to 3 has a cylindrical basic shape, wherein a first end face 2 and one of the first end face 2 opposite end face 7 are connected via a shell side 8.
  • the shell side 8 defines a light exit surface 8 of the optics 1.
  • the light exit surface 8 is formed coaxially to a central axis 9 of the optics 1, which can be designed in particular as the symmetry axis of the optics 1.
  • the optic 1 is produced as a refractive or light-conducting optic 1, for example, made of a transparent plastic material, in particular of PMMA, PC or PMMI.
  • a plurality of light coupling elements 3 is provided in the region of the first end face 2.
  • the Lichteinkoppel institute 3 are individually formed, raised and drop-shaped.
  • a trough-shaped recess 4 is provided at each Lichteinkoppelelement 3 .
  • the trough-shaped recess 4 has an optically effective, first boundary surface 5, which serves as a light input surface 5 of the light coupling element 3.
  • the light coupling surface 5 has a plurality of partial surfaces 5.1, 5.2, 5.3.
  • the partial surfaces 5.1, 5.2, 5.3 are in any case sectionally continuously curved and convex.
  • the drop shape of the light coupling elements 3 results from the shell side, optically effective second boundary surface. 6
  • the light coupling elements 3 have an optical axis 10, which extends parallel to the shell side 8 and the central axis 9.
  • the light coupling elements 3 have perpendicular to the optical axis 10 in any case an approximately elliptical cross section.
  • the second boundary surfaces 6 are formed convexly curved.
  • the Lichteinkoppel implant 3 are evenly spaced circumferentially distributed and adjacent to the shell side 8 is provided.
  • a recess 11 is formed in the region of the second end face 7, a recess 11 is formed.
  • a boundary surface 12 of the recess 11 defines a light output surface 12 having a plurality of light output elements 13.
  • the light output elements 13 are presently designed in the manner of an annularly extended prism structure.
  • the prism structure defines a step contour, in which optically effective partial surfaces 13.1 and optically non-effective partial surfaces 13.2 alternate.
  • the optically effective partial surfaces 13.1 and the optically inactive partial surfaces 13.2 are annularly formed, wherein the optically inactive partial surfaces 13.2 are oriented substantially parallel to the central axis 9 and wherein between the central axis 9 and the optically effective partial surfaces 13.1 a flank angle 14 of the prism structure is formed.
  • a circumferential groove 15 provided on a shell side 8 separates a first region 16 of the optical system 1 which has the light coupling elements 3 from a second one Area 17, which has the recess 11 with the light output surface 12.
  • a shell-side circumferential, annular web 25 is formed coaxially to the central axis 9, which comprises the light coupling elements 3 from the outside.
  • the Fig. 4 to 9 show the photometric details of the optics 1 and selected beam paths for different light coupling elements 3.
  • a designed as a light emitting diode light source 22 is coupled via the light input surface 5 in the optical system 1.
  • a central first partial surface 5.1 of the light coupling surface 5 is shaped such that the light coupled in via the first partial surface 5.1 is bundled and directed in the direction of the light coupling-out surface 12.
  • About the lateral faces 5.2, 5.3 in the optics 1 coupled light is bundled and strikes the shell-side second boundary surface 6 of the light coupling elements 3.
  • the second boundary surface 6 of the light coupling elements 3 is designed in the manner of a total reflection surface such that at least a majority of the over Part surface 5.2, 5.3 coupled light is deflected when hitting the boundary surface 6 in the direction of the light exit surface 12.
  • the Lichteinkoppel elite 3 of the optics 1 are designed differently. They differ in particular with regard to the shape of the first optically effective boundary surface 5 and the shell-side second optically effective boundary surface 6.
  • a first type of light coupling element 3 Fig. 5 is designed as a narrow-emitting Lichteinkoppel innovation 3.1 so that the coupled via the Lichteinkoppel components 5 light in a narrow first Abstrahlkegel 18 with an opening angle 19 of 40 ° +/- 5 ° relative to the optical axis 10 in the direction of the light output surface 12 is radiated. The thus emitted light hits completely on the light outcoupling surface 12 a wide-radiating Lichteinkoppelelement 3.2 after Fig.
  • the light output surface 12 is provided with respect to the optical axis 10 of the light coupling elements 3 in front of the light coupling elements 3, that a predominant part of the injected light directly or after the total reflection at the second boundary surface 6 of the light coupling elements 3 on the light output surface 12 and that only a small part of the coupled-in light strikes the light-emitting surface 8 directly or after the total reflection at the boundary surface 6 of the light-coupling elements 3, without being deflected beforehand at the light-outcoupling surface 12.
  • the Fig. 7 to 9 show that the flank angle 14 of the light output elements 13 is connected in a variable position.
  • the prism structure In the region of the narrow emission light coupling element 3.1, the prism structure is made less steep than in the region of a broadly emitting light coupling element 3.2.
  • a transition between the steeper inclined flank angle 14 and the less steep flank angle 14 is designed continuously and continuously.
  • asymmetrically radiating Lichteinkoppeliana 3.3 are provided.
  • the asymmetrically emitting light coupling elements 3.3 are designed such that a radiation angle in a first half-sphere is greater than a radiation angle in a second half-sphere. In this respect, an asymmetrical emission characteristic results for the medium-width light coupling elements 3.3.
  • the present optics 1 is provided with twenty eight evenly distributed on the circumference arranged Lichteinkoppel comprisen 3.
  • the Lichteinkoppel elite 3 are provided at an angle of approximately 12.86 ° to each other.
  • Seen in the circumferential direction are a first light coupling element 3, a sixth light coupling element 3, a seventh light coupling element 3, an eighth light coupling element 3, a ninth light coupling element 3, a tenth light coupling element 3, a fifteenth light coupling element 3, a twentieth light coupling element 3, a twenty-first light coupling element 3
  • Twenty-second light coupling element 3 a twenty-third light coupling element 3 and a twenty-fourth light coupling element 3 in the manner of the broad-emitting light coupling element 3.2 trained.
  • a second light input element 3, a fourteenth light input element 3, a sixteenth light input element 3 and a twenty-eighth light input element 3 are formed in the manner of the third light coupling element 3.3 and provide an asymmetric light distribution. The provided at three o'clock light input element 3 is counted here as the first light input element 3. The further count is clockwise.
  • An illumination device comprises the optics 1 and a plurality of light-emitting diodes 22 as light sources.
  • Each individual light sources 22 is associated with a light coupling element 3.
  • the number of light sources 22 is less than the number of light coupling elements 3 of the optical system 1.
  • a first configuration of the lighting device according to Fig. 10 It is provided that a total of fourteen light sources 22 are provided, wherein, starting with the first light coupling element 3, each second light coupling element 3 regularly provides a light source 22. This results in a configuration in which a symmetrical assembly with respect to a first transverse central axis 23 and a second transverse central axis 24, which is provided perpendicular to the first transverse central axis 23, is realized.
  • Fig. 12 shows the symmetrical light distribution as an example of a lighting device with a net light flux of 2000 Im, wherein the lighting device is mounted at a height of about 4 m.
  • a Corresponding luminous intensity distribution curve in polar coordinate representation for the symmetrical light distribution is in Fig. 13 played.
  • the lighting device with symmetrical assembly is used, for example, for decorative lamps which are provided in parking lots or in parks and serve to illuminate a substantially rectangular illumination surface as homogeneously as possible.
  • a substantially rectangular illumination surface as homogeneously as possible.
  • illumination of the corners is ensured by the special distribution of the narrowly radiating light coupling elements 3.1 and the broadly radiating light coupling elements 3.2.
  • the assignment of the light sources 22 to the optics 1 is asymmetric.
  • fourteen light sources 22 are provided, wherein a first light input element 3.2, a second light input element 3.3, a fourteenth Lichteinkoppelelement 3.3, the fifteenth Lichteinkoppelelement 3.3, the sixteenth Lichteinkoppelelement 3.1, the seventeenth Lichteinkoppelelement 3.1, the eighteenth Lichteinkoppelelement 3.1, the nineteenth Lichteinkoppelelement 3.1, the Twenty-first Lichteinkoppelelement 3.2, the twenty-third Lichteinkoppelelement 3.2, the twenty-fifth Lichteinkoppelelement 3.1, the twenty-sixth Lichteinkoppelelement 3.1, the twenty-seventh Lichteinkoppelelement 3.1 and the twenty-eighth Lichteinkoppelelement 3.3 each having a light sources 22 is assigned.
  • the schematic representation of the light distribution for the asymmetric lighting device according to Fig. 15 shows that the light is mainly emitted in a first half-plane.
  • Fig. 16 an asymmetrical light distribution.
  • the asymmetry can also be found in the corresponding luminous intensity distribution curve Fig. 17 , wherein the assignment of the light sources 22 to the light coupling elements 3 takes place so that the half-plane is substantially homogeneously illuminated.
  • Asymmetrically populated lighting devices are provided for example for street lights, the street lamp is assigned to the street side and the light is to be emitted in particular in the direction of the road.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

Die Erfindung betrifft eine Optik und eine Beleuchtungsvorrichtung, wie sie beispielsweise bei Dekorleuchten eingesetzt werden. Insbesondere betrifft die Erfindung eine Optik und eine Beleuchtungsvorrichtung für Pilzleuchten, die vorgesehen werden, um Plätze, Promenaden oder Straßen auszuleuchten.The invention relates to an optic and a lighting device, as used for example in decorative lights. In particular, the invention relates to optics and a lighting device for mushroom lights, which are provided to illuminate squares, promenades or streets.

Bekannt sind refraktive Optiken und Beleuchtungsvorrichtungen mit derartigen Optiken, bei denen das Licht von einer Mehrzahl von Lichtquellen über eine Stirnseite in einen im Wesentlichen ringförmigen Körper eingekoppelt wird. Zur Einkopplung sind an der Stirnseite Lichteinkoppelelemente vorgesehen. Die Lichteinkoppelelemente bündeln das von den Lichtquellen abgestrahlte Licht so, dass es im Wesentlichen parallel auf eine als Lichtauskoppelfläche ausgebildete Umlenkfläche trifft. Die Umlenkfläche, welche durch einen Bezug zu einer Längsmittelachse des Optikkörpers als kegelstumpfartig angestellte Innenmantelfläche ausgebildet ist, lenkt das Licht dann in Richtung einer zylindrischen Außenmantelfläche des Optikkörpers. Die Außenmantelfläche des Optikkörpers definiert eine Lichtaustrittsfläche. Die Umlenkung des Lichts an der Lichtauskoppelfläche erfolgt um einen Winkel von 90°, wobei das Licht im Wesentlichen parallel zur Mantelfläche auf die Auskoppelelemente trifft und dann unter einem Winkel von 90° zur Längsmittelachse abgestrahlt wird. Derartige Optiken finden beispielsweise bei Signalleuchten Verwendung.Known refractive optics and lighting devices with such optics, in which the light is coupled from a plurality of light sources via an end face in a substantially annular body. For coupling light coupling elements are provided on the front side. The light-coupling elements bundle the light emitted by the light sources so that it strikes substantially parallel to a deflecting surface formed as a light-outcoupling surface. The deflecting surface, which is formed by a relation to a longitudinal central axis of the optic body as a truncated conical employed inner lateral surface, then deflects the light in the direction of a cylindrical outer circumferential surface of the optic body. The outer circumferential surface of the optic body defines a light exit surface. The deflection of the light at the light outcoupling surface takes place at an angle of 90 °, wherein the light strikes the outcoupling elements essentially parallel to the lateral surface and is then emitted at an angle of 90 ° to the longitudinal central axis. Such optics are used for example in signal lights use.

Gattungsgemäße Optiken sind aus der DE 20 2006 019 347 U1 und der FR 2 936 297 A1 bekannt. Jeweils ist vorgesehen, dass eine Mehrzahl von gleichartig ausgebildeten Lichteinkoppelelementen regelmäßig verteilt am Umfang einer Stirnseite der Optik angeordnet sind.Generic optics are from the DE 20 2006 019 347 U1 and the FR 2 936 297 A1 known. In each case, it is provided that a plurality of identically formed light coupling elements are arranged regularly distributed on the circumference of an end face of the optics.

Aufgabe der vorliegenden Erfindung ist es, eine refraktive Optik für eine Beleuchtungsvorrichtung sowie die Beleuchtungsvorrichtung anzugeben, welche zu Beleuchtungszwecken verwendet werden kann. Insbesondere soll eine vorgegebene Fläche möglichst homogen ausgeleuchtet werden. Um eine Anpassung der Beleuchtungssituation an das jeweilige Anwendungsszenario zu gewährleisten, sollen darüber hinaus mit einer einzigen Optik eine erste homogene Lichtverteilung und eine zweite Lichtverteilung bereitgestellt werden.The object of the present invention is to provide a refractive optical system for a lighting device and the lighting device, which can be used for illumination purposes. In particular, should a given area be illuminated as homogeneously as possible. In order to ensure an adaptation of the lighting situation to the respective application scenario, a first homogeneous light distribution and a second light distribution should moreover be provided with a single optic.

Zur Lösung der Aufgabe weist die erfindungsgemäße Optik die Merkmale des Patentanspruchs 1 auf.To solve the problem, the optical system according to the invention has the features of claim 1.

Der besondere Vorteil der Erfindung besteht darin, dass durch das Formen eines Abstrahlkegels eine hohe Homogenität in der Lichtverteilung bereitgestellt wird. Insbesondere gelingt es, mit einer begrenzten Anzahl von am Umfang beispielsweise regelmäßig verteilten beziehungsweise beabstandeten Lichtquellen eine die Homogenität der Lichtverteilung fördernde Durchmischung der gebündelten Strahlen zu bewirken. Der Lichtstrom der Lichtquellen wird somit in der Optik verteilt und die zu beleuchtende Fläche kann im Wesentlichen homogen ausgeleuchtet werden.The particular advantage of the invention is that a high homogeneity in the light distribution is provided by the shaping of a Abstrahlkegels. In particular, it is possible to effect a homogeneity of the light distribution promoting mixing of the bundled beams with a limited number of circumferentially for example, regularly distributed or spaced light sources. The luminous flux of the light sources is thus distributed in the optics and the surface to be illuminated can be illuminated substantially homogeneously.

Insbesondere kann vorgesehen sein, dass die Lichteinkoppelelemente an der ersten Stirnseite ringförmig am Umfang verteilt und benachbart zu der als Lichtaustrittsfläche dienenden Mantelseite vorgesehen sind. Beispielsweise können an den Lichteinkoppelelementen muldenförmige Ausnehmungen vorgesehen sein, wobei die muldenförmige Ausnehmung eine als eine Lichteinkoppelfläche dienende, optisch wirksame erste Begrenzungsfläche definiert. Die Lichtquellen können nach Art von Leuchtdioden ausgebildet sein und jedenfalls abschnittsweise im Bereich der muldenförmigen Ausnehmung vorgesehen sein. Die erste Begrenzungsfläche kann eine Mehrzahl von Teilfläche aufweisen, wobei die Lichteinkoppelfläche beziehungsweise jede einzelne Teilfläche jedenfalls abschnittsweise stetig gekrümmt ausgebildet sein kann. Insbesondere kann die Lichteinkoppelfläche jedenfalls abschnittsweise konvex gekrümmt sein. Beispielsweise können die Lichteinkoppelelemente separat ausgeformt und insbesondere tropfenförmig gebildet sein. Die Lichteinkoppelelemente können insofern senkrecht zu der optischen Achse einen jedenfalls näherungsweise elliptischen Querschnitt aufweisen.In particular, it may be provided that the light coupling elements are distributed annularly on the circumference at the first end face and are provided adjacent to the jacket side serving as light exit surface. For example, trough-shaped recesses may be provided on the light coupling elements, wherein the trough-shaped recess defines a serving as a light coupling surface, optically effective first boundary surface. The light sources may be formed in the manner of light-emitting diodes and in any case may be provided in sections in the region of the trough-shaped recess. The first boundary surface may have a plurality of partial surface, wherein the light incoupling surface or each individual partial surface may in any case be continuously curved in sections. In particular, the light incoupling surface can in any case be convexly curved in sections. For example, the light coupling elements can be formed separately and in particular formed drop-shaped. The light coupling elements can have an approximately elliptical cross section perpendicular to the optical axis.

Eine mantelseitige Begrenzungsfläche der Optikelemente kann hierbei als eine zweite optisch wirksame Begrenzungsfläche ausgebildet sein. Insbesondere kann die zweite optische Begrenzungsfläche nach Art einer Totalreflexionsfläche ausgebildet sein derart, dass wenigstens ein Teil des über die Lichteinkoppelfläche eingekoppelten Lichts beim Auftreffen auf die zweite Begrenzungsfläche totalreflektiert wird. Bevorzugt wird das auf die zweite Begrenzungsfläche treffende Licht in Richtung der Lichtauskoppelfläche totalreflektiert.A shell-side boundary surface of the optical elements may in this case be formed as a second optically effective boundary surface. In particular, the second optical boundary surface may be designed in the manner of a total reflection surface such that at least part of the light coupled in via the light coupling surface is totally reflected when it strikes the second boundary surface. Preferably, the light striking the second boundary surface is totally reflected in the direction of the light outcoupling surface.

Die an der Lichtauskoppelfläche vorgesehenen Lichtauskoppelelemente können beispielsweise nach Art einer umlaufenden beziehungsweise ringförmigen Prismenstruktur realisiert sein. Ein Flankenwinkel der Prismenstruktur kann bezogen auf die Längsmittelachse der Optik derart bestimmt sein, dass über die Lichteinkoppelelemente eingekoppeltes Licht beim Auftreffen auf die Prismenstruktur in Richtung der Lichtaustrittsfläche totalreflektiert wird.The light output coupling elements provided on the light output surface can, for example, be realized in the manner of a circumferential or annular prism structure. A flank angle of the prism structure may be determined relative to the longitudinal center axis of the optics such that light coupled in via the light coupling elements is totally reflected in the direction of the light exit surface when it strikes the prism structure.

Die Lichteinkoppelelemente können relativ zur Lichtauskoppelfläche beziehungsweise den hieran vorgesehenen Lichtauskoppelelementen derart vorgesehen sein, dass in die Optik eingekoppeltes Licht jedenfalls zu einem überwiegenden Teil unmittelbar beziehungsweise nach der Totalreflexion an der zweiten Begrenzungsfläche der Lichteinkoppelelemente auf die Lichtauskoppelfläche trifft, und dass nur ein geringer Teil des eingekoppelten Lichts unmittelbar beziehungsweise nach der Totalreflexion an der zweiten Begrenzungsfläche auf die Lichtaustrittsfläche trifft, ohne an der Lichtauskoppelfläche umgelenkt worden zu sein.The light coupling elements may be provided relative to the light output surface or the light coupling elements provided thereon in any case for the most part directly or after the total reflection on the second boundary surface of the Lichteinkoppelelemente on the Lichtauskoppelfläche, and that only a small part of the coupled Light directly or after the total reflection on the second boundary surface strikes the light exit surface, without having been deflected at the light outcoupling surface.

Nach einer bevorzugten Ausführungsform der Erfindung werden wenigstens zwei hinsichtlich ihrer Formgebung unterschiedliche Lichteinkoppelelemente vorgesehen. Insbesondere unterscheiden sich die Lichteinkoppelelemente hinsichtlich der Gestaltung der ersten optisch wirksamen Begrenzungsfläche beziehungsweise der zweiten optisch wirksamen Begrenzungsfläche. Vorteilhaft kann durch das Vorsehen von unterschiedlichen Lichteinkoppelelementen eine große Vielzahl verschiedener Lichtverteilungen bereitgestellt werden. Beispielsweise kann eine quadratische beziehungsweise rechteckige Fläche homogen ausgeleuchtet werden. Hierbei wird besonders viel Licht in Richtung der Ecken der Beleuchtungsfläche gelenkt.According to a preferred embodiment of the invention, at least two different light coupling elements are provided with regard to their shape. In particular, the light coupling elements differ with respect to the design of the first optically effective boundary surface or the second optically effective boundary surface. Advantageously, by providing different light coupling elements, a wide variety of different light distributions can be provided. For example, a square or rectangular area can be homogeneously illuminated. In this case, a lot of light is directed in the direction of the corners of the illumination surface.

Nach einer Weiterbildung der Erfindung ist mindestens ein eng abstrahlendes Lichteinkoppelelement vorgesehen, welches einen engen Abstrahlkegel mit einem Öffnungswinkel von 40° +/- 5° bildet. Weiter ist mindestens ein breit abstrahlendes Lichteinkoppelelement mit einem breiten Abstrahlkegel und einem Öffnungswinkel von 70° +/- 5° bezogen auf die optische Achse des Lichteinkoppelelements vorgesehen. Vorteilhaft kann über ein eng abstrahlendes Lichteinkoppelelement in die Optik eingekoppeltes Licht die Ecken einer quadratischen beziehungsweise rechteckigen Beleuchtungsfläche ausleuchten, während die breit abstrahlenden Lichteinkoppelelemente das Licht weniger weit, aber dafür breit umlenken.According to a development of the invention, at least one narrow-emitting light coupling element is provided, which forms a narrow emission cone with an opening angle of 40 ° +/- 5 °. Furthermore, at least one broadly emitting light coupling element with a wide emission cone and an aperture angle of 70 ° +/- 5 ° relative to the optical axis of the light coupling element is provided. Advantageously, light coupled into the optics via a narrowly emitting light coupling element can illuminate the corners of a square or rectangular illumination surface, while the broadly emitting light coupling elements deflect the light less widely, but more widely.

Nach einer Weiterbildung der Erfindung ist die Ausnehmung jedenfalls abschnittsweise schalenförmig ausgebildet. Insbesondere ist die als Lichtauskoppelfläche wirkende Begrenzungsfläche der Ausnehmung gebogen geformt. Vorteilhaft verbessert sich die Homogenität der Ausleuchtung durch das Vorsehen der gebogenen Lichtaustrittsfläche. Es wird insofern eine Lichtverteilung hoher Güte bereitgestellt, wobei das Licht so umgelenkt wird, dass es in einer Montageposition der Optik seitlich und nach unten abgestrahlt wird.According to a development of the invention, the recess is at least partially formed shell-shaped. In particular, the limiting surface of the recess acting as light output surface is bent. The homogeneity of the illumination advantageously improves by the provision of the curved light exit surface. It is insofar provided a high-quality light distribution, wherein the light is deflected so that it is emitted laterally and downwardly in a mounting position of the optics.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass der Flankenwinkel der Prismenstruktur ortsvariabel gestaltet ist. Insbesondere kann vorgesehen sein, dass die Prismenstruktur vor den eng abstrahlenden Lichteinkoppelelementen weniger steil angestellt ist als die gleiche Prismenstruktur vor den breit abstrahlenden Lichteinkoppelelementen. Vor den breit abstrahlenden Lichteinkoppelelementen ist insofern der zwischen der Prismenstruktur und der Mittelachse gebildete Flankenwinkel spitzer ausgebildet beziehungsweise kleiner als vor den eng abstrahlenden Lichteinkoppelelementen. Der Übergang von dem steilen Flankenwinkel zu dem weniger steilen Flankenwinkel kann dabei insbesondere kontinuierlich erfolgen. Vorteilhaft kann durch das Vorsehen unterschiedlicher Flankenwinkel eine Abstrahlweite der Optik variiert werden. Es ist insofern so, dass über die Lichtauskoppelelemente mit dem ortsvariablen Flankenwinkel die Lichtverteilung beeinflusst werden kann. Die kontinuierliche Veränderung des Flankenwinkels begünstigt zum einen eine homogene Ausleuchtung und vermeidet zum anderen Stufen beziehungsweise Sprünge, welche als helle beziehungsweise dunkle Bereiche in der Lichtverteilung wahrgenommen werden können.According to a development of the invention, it is provided that the flank angle of the prismatic structure is designed to be spatially variable. In particular, it can be provided that the prism structure is made less steep in front of the narrowly radiating light coupling elements than the same prism structure in front of the broadly emitting light coupling elements. In this respect, the flank angle formed between the prism structure and the central axis is formed sharper or smaller than in front of the narrowly emitting light coupling elements in front of the broadly radiating light coupling elements. The transition from the steep flank angle to the less steep flank angle can be carried out in particular continuously. Advantageously, by providing different flank angle a range of the optics can be varied. It is so far that the light distribution can be influenced via the light output elements with the location-variable flank angle. The continuous change of the flank angle favors, on the one hand, a homogeneous illumination and, on the other hand, avoids steps or jumps which are as bright or dark areas in the light distribution can be perceived.

Zur Lösung der Aufgabe umfasst die Beleuchtungsvorrichtung eine Optik nach einem der Ansprüche 1 bis 8 sowie eine Mehrzahl von Leuchtdioden als Lichtquellen, wobei jeder Leuchtdiode ein Lichteinkoppelelement zugeordnet ist und wobei eine Anzahl der Leuchtdioden geringer ist als eine Anzahl der Lichteinkoppelelemente der Optik. Beispielsweise können achtundzwanzig Lichteinkoppelelemente und vierzehn Leuchtdioden vorgesehen werden, wobei in einer ersten Betriebskonfiguration der Beleuchtungsvorrichtung an jedem zweiten Lichteinkoppelelement eine Leuchtdiode vorgesehen ist und wobei in einer zweiten Betriebskonfiguration die Lichtquellen ungleichförmig an den Lichteinkoppelelementen vorgesehen sind.To achieve the object, the illumination device comprises an optical system according to one of claims 1 to 8 and a plurality of light-emitting diodes as light sources, wherein each light emitting diode is associated with a Lichteinkoppelelement and wherein a number of light-emitting diodes is less than a number of Lichteinkoppelelemente the optics. For example, twenty-eight light coupling elements and fourteen light-emitting diodes may be provided, wherein in a first operating configuration of the lighting device a light-emitting diode is provided on every second light coupling element and wherein in a second operating configuration the light sources are provided non-uniformly on the light coupling elements.

Der besondere Vorteil der Erfindung besteht darin, dass durch das Vorsehen einer Vielzahl von Lichteinkoppelelementen eine variable Bestückung derselben mit Lichtquellen möglich ist. Durch das variable Bestücken der Optik mit Lichtquellen können bei Verwendung der gleichen Optik unterschiedliche Lichtverteilungen bereitgestellt werden. Beispielsweise kann in der ersten Betriebskonfiguration eine symmetrische Lichtverteilung bereitgestellt werden, welche vorteilhaft Verwendung findet bei Dekorleuchten, die vorgesehen sind, um einen Parkplatz flächig auszuleuchten. Demgegenüber kann durch das ungleichförmige Anordnen der Lichtquellen eine asymmetrische Lichtverteilung, insbesondere eine einseitige Lichtverteilung bereitgestellt werden. Diese Lichtverteilung ist vorteilhaft bei der Verwendung der Beleuchtungsvorrichtung zur Ausleuchtung von Straßenzügen, Promenaden oder dergleichen. Insgesamt reduziert sich so der Design- und Montageaufwand, da Dekorleuchten für unterschiedliche Anwendungen mit dem gleichen Optikkörper ausgestattet werden können und der Optikkörper demzufolge in großer Stückzahl gefertigt wird. Veränderlich ist allein die Anordnung der Lichtquellen. Beispielsweise kann für beide Betriebskonfigurationen ein gleicher Schaltungsträger verwendet werden, welcher jedoch in unterschiedlicher Weise mit Lichtquellen bestückt wird.The particular advantage of the invention is that by providing a plurality of light coupling elements a variable equipping the same with light sources is possible. By variably populating the optics with light sources, different light distributions can be provided when using the same optics. For example, in the first operating configuration, a symmetrical light distribution can be provided, which is advantageously used in decorative lamps which are provided to illuminate a parking area in a planar manner. In contrast, the non-uniform arrangement of the light sources can provide an asymmetrical light distribution, in particular a one-sided light distribution. This light distribution is advantageous in the use of the lighting device for illuminating streets, promenades or the like. Overall, this reduces the design and assembly costs, since decorative lamps can be equipped for different applications with the same optical body and the optical body is therefore manufactured in large numbers. The only variable is the arrangement of the light sources. For example, an identical circuit carrier can be used for both operating configurations, which, however, is equipped with light sources in different ways.

Den weiteren Unteransprüchen und der nachfolgenden Beschreibung sind weitere Vorteile, Merkmale und Einzelheiten der Erfindung zu entnehmen. Dort erwähnteThe other subclaims and the following description further advantages, features and details of the invention can be found. Mentioned there

Merkmale können jeweils einzeln für sich oder auch in beliebiger Kombination erfindungswesentlich sein. Erfindungsgemäß beschriebene Merkmale und Details der Optik gelten selbstverständlich auch im Zusammenhang mit der erfindungsgemäßen Beleuchtungsvorrichtung und umgekehrt. So kann auf die Offenbarung zu den einzelnen Erfindungsaspekten stets wechselseitig Bezug genommen werden. Die Zeichnungen dienen lediglich beispielhaft der Klarstellung der Erfindung und haben keinen einschränkenden Charakter.Features may be essential to the invention individually or in any combination. Features and details of the optics described in accordance with the invention Of course, also apply in connection with the lighting device according to the invention and vice versa. Thus, the disclosure of the individual aspects of the invention can always be referenced reciprocally. The drawings are merely illustrative of the clarification of the invention and are not of a restrictive nature.

Anhand der beigefügten Zeichnungen wird die Erfindung nachfolgend näher erläutert. Dabei zeigt:

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Optik,
Fig. 2
eine Aufsicht auf die Optik nach Fig. 1,
Fig. 3
eine Schnittdarstellung der Optik nach dem Schnitt A-A gemäß Fig. 2,
Fig. 4
einen Teilschnitt der Optik nach Fig. 3 mit Darstellung des Strahlengangs,
Fig. 5
eine Schnittdarstellung nach dem Schnitt B-B gemäß Fig. 2 mit dargestelltem Strahlengang,
Fig. 6
eine Schnittdarstellung nach dem Schnitt C-C gemäß Fig. 2 mit Darstellung des Strahlengangs,
Fig. 7
eine Schnittdarstellung nach dem Schnitt D-D nach Fig. 2,
Fig. 8
eine Schnittdarstellung nach dem Schnitt E-E nach Fig. 2,
Fig. 9
eine Gegenüberstellung der Details X und Y nach den Fig. 7 und 8,
Fig. 10
eine erste Betriebskonfiguration einer erfindungsgemäßen Beleuchtungsvorrichtung mit einer regelmäßigen Anordnung einer Mehrzahl von Lichtquellen,
Fig. 11
eine Prinzipdarstellung der Abstrahlcharakteristik der Beleuchtungsvorrichtung in der ersten Betriebskonfiguration nach Fig. 10,
Fig. 12
eine Lichtverteilung der Beleuchtungsvorrichtung in der ersten Betriebskonfiguration nach Fig. 10,
Fig. 13
eine Lichtstärkeverteilungskurve der Beleuchtungsvorrichtung nach Fig. 10 in einer Polar-Koordinatendarstellung,
Fig. 14
eine zweite Betriebskonfiguration einer erfindungsgemäßen Beleuchtungsvorrichtung mit einer regelmäßigen Anordnung der Mehrzahl von Lichtquellen,
Fig. 15
eine Prinzipdarstellung der Abstrahlcharakteristik der Beleuchtungsvorrichtung in der zweiten Betriebskonfiguration nach Fig. 14,
Fig. 16
eine Lichtverteilung der Beleuchtungsvorrichtung in der zweiten Betriebskonfiguration nach Fig. 14 und
Fig. 17
eine Lichtstärkeverteilungskurve der Beleuchtungsvorrichtung nach Fig. 14 in einer Polar-Koordinatendarstellung.
Reference to the accompanying drawings, the invention is explained in more detail below. Showing:
Fig. 1
a perspective view of an optical system according to the invention,
Fig. 2
a view of the optics Fig. 1 .
Fig. 3
a sectional view of the optics according to the section AA according to Fig. 2 .
Fig. 4
a partial section of the optics Fig. 3 with representation of the beam path,
Fig. 5
a sectional view according to the section BB according to Fig. 2 with illustrated beam path,
Fig. 6
a sectional view according to the section CC according to Fig. 2 with representation of the beam path,
Fig. 7
a sectional view after the section DD to Fig. 2 .
Fig. 8
a sectional view after the section EE after Fig. 2 .
Fig. 9
a comparison of the details X and Y after the FIGS. 7 and 8 .
Fig. 10
a first operating configuration of a lighting device according to the invention with a regular arrangement of a plurality of light sources,
Fig. 11
a schematic representation of the radiation characteristic of the lighting device in the first operating configuration according to Fig. 10 .
Fig. 12
a light distribution of the lighting device in the first operating configuration according to Fig. 10 .
Fig. 13
a luminous intensity distribution curve of the lighting device according to Fig. 10 in a polar coordinate representation,
Fig. 14
a second operating configuration of a lighting device according to the invention with a regular arrangement of the plurality of light sources,
Fig. 15
a schematic diagram of the radiation characteristic of the lighting device in the second operating configuration according to Fig. 14 .
Fig. 16
a light distribution of the lighting device in the second operating configuration according to Fig. 14 and
Fig. 17
a luminous intensity distribution curve of the lighting device according to Fig. 14 in a polar coordinate representation.

Eine erfindungsgemäße Optik 1 nach den Fig. 1 bis 3 weist eine zylinderförmige Grundform auf, wobei eine erste Stirnseite 2 und eine der ersten Stirnseite 2 gegenüberliegenden Stirnseite 7 über eine Mantelseite 8 verbunden sind. Die Mantelseite 8 definiert eine Lichtaustrittsfläche 8 der Optik 1. Die Lichtaustrittsfläche 8 ist koaxial zu einer Mittelachse 9 der Optik 1 ausgebildet, welche insbesondere als Symmetrieachse der Optik 1 ausgeführt sein kann. Die Optik 1 ist als refraktive beziehungsweise lichtleitende Optik 1 beispielsweise aus einem transparenten Kunststoffmaterial, insbesondere aus PMMA, PC oder PMMI hergestellt.An optical system 1 according to the invention Fig. 1 to 3 has a cylindrical basic shape, wherein a first end face 2 and one of the first end face 2 opposite end face 7 are connected via a shell side 8. The shell side 8 defines a light exit surface 8 of the optics 1. The light exit surface 8 is formed coaxially to a central axis 9 of the optics 1, which can be designed in particular as the symmetry axis of the optics 1. The optic 1 is produced as a refractive or light-conducting optic 1, for example, made of a transparent plastic material, in particular of PMMA, PC or PMMI.

Im Bereich der ersten Stirnseite 2 ist eine Mehrzahl von Lichteinkoppelelementen 3 vorgesehen. Die Lichteinkoppelelemente 3 sind einzeln ausgeformt, erhaben und tropfenförmig. An jedem Lichteinkoppelelement 3 ist eine muldenförmige Ausnehmung 4 vorgesehen. Die muldenförmige Ausnehmung 4 weist eine optisch wirksame, erste Begrenzungsfläche 5 auf, welche als eine Lichteinkoppelfläche 5 des Lichteinkoppelelements 3 dient. Die Lichteinkoppelfläche 5 weist eine Mehrzahl von Teilflächen 5.1, 5.2, 5.3 auf. Die Teilflächen 5.1, 5.2, 5.3 sind jedenfalls abschnittsweise stetig gekrümmt und konvex geformt. Die Tropfenform der Lichteinkoppelelemente 3 ergibt sich durch die mantelseitige, optisch wirksam zweite Begrenzungsfläche 6.In the region of the first end face 2, a plurality of light coupling elements 3 is provided. The Lichteinkoppelelemente 3 are individually formed, raised and drop-shaped. At each Lichteinkoppelelement 3 a trough-shaped recess 4 is provided. The trough-shaped recess 4 has an optically effective, first boundary surface 5, which serves as a light input surface 5 of the light coupling element 3. The light coupling surface 5 has a plurality of partial surfaces 5.1, 5.2, 5.3. The partial surfaces 5.1, 5.2, 5.3 are in any case sectionally continuously curved and convex. The drop shape of the light coupling elements 3 results from the shell side, optically effective second boundary surface. 6

Die Lichteinkoppelelemente 3 besitzen eine optische Achse 10, welche sich parallel zur Mantelseite 8 beziehungsweise zur Mittelachse 9 erstreckt. Die Lichteinkoppelelemente 3 besitzen senkrecht zu der optischen Achse 10 einen jedenfalls näherungsweise elliptischen Querschnitt. Die zweiten Begrenzungsflächen 6 sind konvex gekrümmt ausgebildet. Die Lichteinkoppelelemente 3 sind gleichmäßig beabstandet umfangmäßig verteilt und benachbart zu der Mantelseite 8 vorgesehen.The light coupling elements 3 have an optical axis 10, which extends parallel to the shell side 8 and the central axis 9. The light coupling elements 3 have perpendicular to the optical axis 10 in any case an approximately elliptical cross section. The second boundary surfaces 6 are formed convexly curved. The Lichteinkoppelelemente 3 are evenly spaced circumferentially distributed and adjacent to the shell side 8 is provided.

Im Bereich der zweiten Stirnseite 7 ist eine Ausnehmung 11 gebildet. Eine Begrenzungsfläche 12 der Ausnehmung 11 definiert eine Lichtauskoppelfläche 12 mit einer Mehrzahl von Lichtauskoppelelementen 13. Die Lichtauskoppelelemente 13 sind vorliegend nach Art einer ringförmig erstreckten Prismenstruktur ausgebildet. Die Prismenstruktur definiert eine Stufenkontur, bei der sich optisch wirksame Teilflächen 13.1 und optisch nicht wirksame Teilflächen 13.2 abwechseln. Jeweils sind die optisch wirksamen Teilflächen 13.1 und die optisch nicht wirksamen Teilflächen 13.2 ringförmig gebildet, wobei die optisch nicht wirksamen Teilflächen 13.2 im Wesentlichen parallel zu der Mittelachse 9 orientiert sind und wobei zwischen der Mittelachse 9 und den optisch wirksamen Teilflächen 13.1 ein Flankenwinkel 14 der Prismenstruktur gebildet ist.In the region of the second end face 7, a recess 11 is formed. A boundary surface 12 of the recess 11 defines a light output surface 12 having a plurality of light output elements 13. The light output elements 13 are presently designed in the manner of an annularly extended prism structure. The prism structure defines a step contour, in which optically effective partial surfaces 13.1 and optically non-effective partial surfaces 13.2 alternate. In each case, the optically effective partial surfaces 13.1 and the optically inactive partial surfaces 13.2 are annularly formed, wherein the optically inactive partial surfaces 13.2 are oriented substantially parallel to the central axis 9 and wherein between the central axis 9 and the optically effective partial surfaces 13.1 a flank angle 14 of the prism structure is formed.

Eine an einer Mantelseite 8 vorgesehene umlaufende Nut 15 trennt einen die Lichteinkoppelelemente 3 aufweisenden ersten Bereich 16 der Optik 1 von einem zweiten Bereich 17, der die Ausnehmung 11 mit der Lichtauskoppelfläche 12 aufweist. Im ersten Bereich 16 ist koaxial zu der Mittelachse 9 ein mantelseitig umlaufender, ringförmiger Steg 25 gebildet, welche die Lichteinkoppelelemente 3 von außen umfasst.A circumferential groove 15 provided on a shell side 8 separates a first region 16 of the optical system 1 which has the light coupling elements 3 from a second one Area 17, which has the recess 11 with the light output surface 12. In the first region 16, a shell-side circumferential, annular web 25 is formed coaxially to the central axis 9, which comprises the light coupling elements 3 from the outside.

Die Fig. 4 bis 9 zeigen die lichttechnischen Details der Optik 1 sowie ausgewählte Strahlenverläufe für verschiedene Lichteinkoppelelemente 3. Von einer als Leuchtdiode ausgebildeten Lichtquelle 22 abgestrahltes Licht wird über die Lichteinkoppelfläche 5 in die Optik 1 eingekoppelt. Eine zentrale erste Teilfläche 5.1 der Lichteinkoppelfläche 5 ist so geformt, dass das über die erste Teilfläche 5.1 eingekoppelte Licht gebündelt in Richtung der Lichtauskoppelfläche 12 gelenkt wird. Über die seitlichen Teilflächen 5.2, 5.3 in die Optik 1 eingekoppeltes Licht wird gebündelt und trifft auf die mantelseitige zweite Begrenzungsfläche 6 der Lichteinkoppelelemente 3. Die zweite Begrenzungsfläche 6 der Lichteinkoppelelemente 3 ist nach Art einer Totalreflexionsfläche derart ausgebildet, dass jedenfalls ein überwiegende Teil des über die Teilfläche 5.2, 5.3 eingekoppelten Lichts beim Auftreffen auf die Begrenzungsfläche 6 in Richtung der Lichtaustrittsfläche 12 umgelenkt wird.The Fig. 4 to 9 show the photometric details of the optics 1 and selected beam paths for different light coupling elements 3. From a designed as a light emitting diode light source 22 is coupled via the light input surface 5 in the optical system 1. A central first partial surface 5.1 of the light coupling surface 5 is shaped such that the light coupled in via the first partial surface 5.1 is bundled and directed in the direction of the light coupling-out surface 12. About the lateral faces 5.2, 5.3 in the optics 1 coupled light is bundled and strikes the shell-side second boundary surface 6 of the light coupling elements 3. The second boundary surface 6 of the light coupling elements 3 is designed in the manner of a total reflection surface such that at least a majority of the over Part surface 5.2, 5.3 coupled light is deflected when hitting the boundary surface 6 in the direction of the light exit surface 12.

Die Lichteinkoppelelemente 3 der Optik 1 sind unterschiedlich ausgebildet. Sie unterscheiden sich insbesondere hinsichtlich der Form der ersten optisch wirksamen Begrenzungsfläche 5 sowie der mantelseitigen zweiten optisch wirksamen Begrenzungsfläche 6. Eine erste Art von Lichteinkoppelelementen 3.1 nach Fig. 5 ist als eng abstrahlende Lichteinkoppelelemente 3.1 so ausgebildet, dass das über die Lichteinkoppelfläche 5 eingekoppelte Licht in einem engen ersten Abstrahlkegel 18 mit einem Öffnungswinkel 19 von 40° +/- 5° bezogen auf die optische Achse 10 in Richtung der Lichtauskoppelfläche 12 abgestrahlt wird. Das so abgestrahlte Licht trifft vollständig auf die Lichtauskoppelfläche 12. Ein breit abstrahlendes Lichteinkoppelelement 3.2 nach Fig. 6 weist einen breiten zweiten Abstrahlkegel 20 mit einem zweiten Öffnungswinkel 21 von 70° +/- 5° bezogen auf die optische Achse 10 auf. Hierbei ist die Lichtauskoppelfläche 12 bezogen auf die optische Achse 10 der Lichteinkoppelelemente 3 derart vor den Lichteinkoppelelementen 3 vorgesehen, dass ein überwiegender Teil des eingekoppelten Lichts unmittelbar beziehungsweise nach der Totalreflexion an der zweiten Begrenzungsfläche 6 der Lichteinkoppelelemente 3 auf die Lichtauskoppelfläche 12 trifft und dass nur ein geringer Teil des eingekoppelten Lichts unmittelbar beziehungsweise nach der Totalreflexion an der Begrenzungsfläche 6 der Lichteinkoppelelemente 3 auf die Lichtaustrittsfläche 8 trifft, ohne zuvor an der Lichtauskoppelfläche 12 umgelenkt zu werden.The Lichteinkoppelelemente 3 of the optics 1 are designed differently. They differ in particular with regard to the shape of the first optically effective boundary surface 5 and the shell-side second optically effective boundary surface 6. A first type of light coupling element 3 Fig. 5 is designed as a narrow-emitting Lichteinkoppelelemente 3.1 so that the coupled via the Lichteinkoppelfläche 5 light in a narrow first Abstrahlkegel 18 with an opening angle 19 of 40 ° +/- 5 ° relative to the optical axis 10 in the direction of the light output surface 12 is radiated. The thus emitted light hits completely on the light outcoupling surface 12 a wide-radiating Lichteinkoppelelement 3.2 after Fig. 6 has a wide second emission cone 20 with a second opening angle 21 of 70 ° +/- 5 ° with respect to the optical axis 10. Here, the light output surface 12 is provided with respect to the optical axis 10 of the light coupling elements 3 in front of the light coupling elements 3, that a predominant part of the injected light directly or after the total reflection at the second boundary surface 6 of the light coupling elements 3 on the light output surface 12 and that only a small part of the coupled-in light strikes the light-emitting surface 8 directly or after the total reflection at the boundary surface 6 of the light-coupling elements 3, without being deflected beforehand at the light-outcoupling surface 12.

Die Fig. 7 bis 9 zeigen, dass der Flankenwinkel 14 der Lichtauskoppelelemente 13 ortsvariabel geschaltet ist. Im Bereich des eng abstrahlenden Lichteinkoppelelements 3.1 ist die Prismenstruktur weniger steil angestellt als im Bereich eines breit abstrahlenden Lichteinkoppelelements 3.2. Der Flankenwinkel 14, welcher zwischen der optisch wirksamen Teilfläche 13.1 der Prismenstruktur und der Mittelachse 9 gebildet ist, ist insofern vor den breit abstrahlenden Lichteinkoppelelementen 3.2 spitzer beziehungsweise kleiner als vor den eng abstrahlenden Lichteinkoppelelementen 3.1. Ein Übergang zwischen dem steiler angestellten Flankenwinkel 14 und dem weniger steil angestellten Flankenwinkel 14 ist dabei kontinuierlich und stufenlos gestaltet.The Fig. 7 to 9 show that the flank angle 14 of the light output elements 13 is connected in a variable position. In the region of the narrow emission light coupling element 3.1, the prism structure is made less steep than in the region of a broadly emitting light coupling element 3.2. The flank angle 14, which is formed between the optically effective subarea 13.1 of the prism structure and the central axis 9, is thus sharper or smaller than in front of the narrowly radiating light coupling elements 3.1 in front of the broadly radiating light coupling elements 3.2. A transition between the steeper inclined flank angle 14 and the less steep flank angle 14 is designed continuously and continuously.

Neben den eng abstrahlenden Lichteinkoppelelementen 3.1 und den breit abstrahlenden Lichteinkoppelelementen 3.2 sind asymmetrisch abstrahlende Lichteinkoppelelemente 3.3 vorgesehen. Die asymmetrisch abstrahlenden Lichteinkoppelelemente 3.3 sind derart ausgeführt, dass ein Abstrahlwinkel in eine erste Halbsphäre größer ist als ein Abstrahlwinkel in eine zweite Halbsphäre. Insofern ergibt sich eine asymmetrische Abstrahlcharakteristik für die mittelbreiten Lichteinkoppelelemente 3.3.In addition to the narrow-emitting light coupling elements 3.1 and the broad-emitting light coupling elements 3.2 asymmetrically radiating Lichteinkoppelelemente 3.3 are provided. The asymmetrically emitting light coupling elements 3.3 are designed such that a radiation angle in a first half-sphere is greater than a radiation angle in a second half-sphere. In this respect, an asymmetrical emission characteristic results for the medium-width light coupling elements 3.3.

Konkret ist die vorliegende Optik 1 mit achtundzwanzig am Umfang gleichmäßig verteilt angeordneten Lichteinkoppelelementen 3 vorgesehen. Die Lichteinkoppelelemente 3 sind unter einem Winkel von näherungsweise 12,86° zueinander vorgesehen. In Umfangsrichtung gesehen sind ein erstes Lichteinkoppelelement 3, ein sechstes Lichteinkoppelelement 3, ein siebtes Lichteinkoppelelement 3, ein achtes Lichteinkoppelelement 3, ein neuntes Lichteinkoppelelement 3, ein zehntes Lichteinkoppelelement 3, ein fünfzehntes Lichteinkoppelelement 3, ein zwanzigstes Lichteinkoppelelement 3, ein einundzwanzigstes Lichteinkoppelelement 3, ein zweiundzwanzigstes Lichteinkoppelelement 3, ein dreiundzwanzigstes Lichteinkoppelelement 3 und ein vierundzwanzigstes Lichteinkoppelelement 3 nach Art des breit abstrahlenden Lichteinkoppelelements 3.2 ausgebildet. Ein drittes Lichteinkoppelelement 3, ein viertes Lichteinkoppelelement 3, ein fünftes Lichteinkoppelelement 3, ein elftes Lichteinkoppelelement 3, ein zwölftes Lichteinkoppelelement 3, ein dreizehntes Lichteinkoppelelement 3, ein siebzehntes Lichteinkoppelelement 3, ein achtzehntes Lichteinkoppelelement 3, ein neunzehntes Lichteinkoppelelement 3, ein fünfundzwanzigstes Lichteinkoppelelement 3, ein sechsundzwanzigstes Lichteinkoppelelement 3 und ein siebenundzwanzigstes Lichteinkoppelelement 3 sind nach Art des eng abstrahlenden Lichteinkoppelelements 3.1 ausgebildet sind. Ein zweites Lichteinkoppelelement 3, ein vierzehntes Lichteinkoppelelement 3, ein sechzehntes Lichteinkoppelelement 3 und ein achtundzwanzigstes Lichteinkoppelelement 3 sind nach Art des dritten Lichteinkoppelelements 3.3 ausgebildet und stellen eine asymmetrische Lichtverteilung bereit. Das auf drei Uhr vorgesehene Lichteinkoppelelement 3 ist hierbei als erstes Lichteinkoppelelement 3 gezählt. Die weitere Zählung erfolgt im Uhrzeigersinn.Specifically, the present optics 1 is provided with twenty eight evenly distributed on the circumference arranged Lichteinkoppelelementen 3. The Lichteinkoppelelemente 3 are provided at an angle of approximately 12.86 ° to each other. Seen in the circumferential direction are a first light coupling element 3, a sixth light coupling element 3, a seventh light coupling element 3, an eighth light coupling element 3, a ninth light coupling element 3, a tenth light coupling element 3, a fifteenth light coupling element 3, a twentieth light coupling element 3, a twenty-first light coupling element 3 Twenty-second light coupling element 3, a twenty-third light coupling element 3 and a twenty-fourth light coupling element 3 in the manner of the broad-emitting light coupling element 3.2 trained. A third light coupling element 3, a fourth light coupling element 3, a fifth light coupling element 3, an eleventh light coupling element 3, a twelfth light coupling element 3, a thirteenth light coupling element 3, a seventeenth light coupling element 3, an eighteenth light coupling element 3, a nineteenth light coupling element 3, a twenty fifth light coupling element 3, a twenty-sixth light coupling element 3 and a twenty-seventh light coupling element 3 are formed in the manner of the narrow-emitting light coupling element 3.1. A second light input element 3, a fourteenth light input element 3, a sixteenth light input element 3 and a twenty-eighth light input element 3 are formed in the manner of the third light coupling element 3.3 and provide an asymmetric light distribution. The provided at three o'clock light input element 3 is counted here as the first light input element 3. The further count is clockwise.

Eine erfindungsgemäße Beleuchtungsvorrichtung umfasst die Optik 1 sowie eine Mehrzahl von Leuchtdioden 22 als Lichtquellen. Jeder einzelnen Lichtquellen 22 ist ein Lichteinkoppelelement 3 zugeordnet. Insgesamt ist die Anzahl der Lichtquellen 22 geringer als die Anzahl der Lichteinkoppelelemente 3 der Optik 1. Nach einer ersten Konfiguration der Beleuchtungsvorrichtung gemäß Fig. 10 ist vorgesehen, dass insgesamt vierzehn Lichtquellen 22 vorgesehen werden, wobei beginnend mit dem ersten Lichteinkoppelelement 3 regelmäßig jedes zweite Lichteinkoppelelement 3 eine Lichtquellen 22 vorsieht. Es ergibt sich hierdurch eine Konfiguration, in der eine symmetrische Bestückung in Bezug auf eine erste Quermittelachse 23 und eine zweite Quermittelachse 24, welche senkrecht zur ersten Quermittelachse 23 vorgesehen ist, realisiert ist. Infolge der symmetrischen Bestückung und der Zuordnung der Lichtquellen 22 zu den verschiedenen eng abstrahlenden Lichteinkoppelelementen 3.1 beziehungsweise den verschiedenen breit abstrahlenden Lichteinkoppelelementen 3.2 ergibt sich eine symmetrische, im Wesentlichen rechteckige Lichtverteilung, welche dem Prinzip nach in Fig. 11 dargestellt ist. Fig. 12 zeigt die symmetrische Lichtverteilung exemplarisch für eine Beleuchtungsvorrichtung mit einem Nettolichtstrom von 2000 Im, wobei die Beleuchtungsvorrichtung in einer Höhe von zirka 4 m montiert ist. Eine korrespondierende Lichtstärkeverteilungskurve in Polar-Koordinatendarstellung für die symmetrische Lichtverteilung ist in Fig. 13 wiedergegeben.An illumination device according to the invention comprises the optics 1 and a plurality of light-emitting diodes 22 as light sources. Each individual light sources 22 is associated with a light coupling element 3. Overall, the number of light sources 22 is less than the number of light coupling elements 3 of the optical system 1. According to a first configuration of the lighting device according to Fig. 10 It is provided that a total of fourteen light sources 22 are provided, wherein, starting with the first light coupling element 3, each second light coupling element 3 regularly provides a light source 22. This results in a configuration in which a symmetrical assembly with respect to a first transverse central axis 23 and a second transverse central axis 24, which is provided perpendicular to the first transverse central axis 23, is realized. As a result of the symmetrical equipping and the assignment of the light sources 22 to the different narrow-emitting Lichteinkoppelelementen 3.1 or the various broad-emitting Lichteinkoppelelementen 3.2 results in a symmetrical, substantially rectangular light distribution, which in principle according to Fig. 11 is shown. Fig. 12 shows the symmetrical light distribution as an example of a lighting device with a net light flux of 2000 Im, wherein the lighting device is mounted at a height of about 4 m. A Corresponding luminous intensity distribution curve in polar coordinate representation for the symmetrical light distribution is in Fig. 13 played.

Die Beleuchtungsvorrichtung mit symmetrischer Bestückung wird beispielsweise verwendet für Dekorleuchten, welche auf Parkplätzen oder in Parks vorgesehen werden und dazu dienen, eine im Wesentlichen rechteckige Beleuchtungsfläche möglichst homogen auszuleuchten. Hierbei wird durch die spezielle Verteilung der eng abstrahlenden Lichteinkoppelelemente 3.1 und der breit abstrahlenden Lichteinkoppelelemente 3.2 neben der homogenen Ausleuchtung der Fläche insbesondere auch eine Ausleuchtung der Ecken gewährleistet.The lighting device with symmetrical assembly is used, for example, for decorative lamps which are provided in parking lots or in parks and serve to illuminate a substantially rectangular illumination surface as homogeneously as possible. In this case, in addition to the homogeneous illumination of the surface, in particular illumination of the corners is ensured by the special distribution of the narrowly radiating light coupling elements 3.1 and the broadly radiating light coupling elements 3.2.

In einer zweiten Betriebskonfiguration nach der Figur 14 erfolgt die Zuordnung der Lichtquellen 22 zu der Optik 1 asymmetrisch. Grundsätzlich sind neuerlich vierzehn Lichtquellen 22 vorgesehen, wobei einem ersten Lichteinkoppelelement 3.2, einem zweiten Lichteinkoppelelement 3.3, einem vierzehnten Lichteinkoppelelement 3.3, dem fünfzehnten Lichteinkoppelelement 3.3, dem sechzehnten Lichteinkoppelelement 3.1, dem siebzehnten Lichteinkoppelelement 3.1, dem achtzehnten Lichteinkoppelelement 3.1, dem neunzehnten Lichteinkoppelelement 3.1, dem einundzwanzigstens Lichteinkoppelelement 3.2, dem dreiundzwanzigsten Lichteinkoppelelement 3.2, dem fünfundzwanzigsten Lichteinkoppelelement 3.1, dem sechsundzwanzigsten Lichteinkoppelelement 3.1, dem siebenundzwanzigsten Lichteinkoppelelement 3.1 und dem achtundzwanzigsten Lichteinkoppelelement 3.3 jeweils eine Lichtquellen 22 zugeordnet ist.In a second operating configuration after the FIG. 14 the assignment of the light sources 22 to the optics 1 is asymmetric. In principle, fourteen light sources 22 are provided, wherein a first light input element 3.2, a second light input element 3.3, a fourteenth Lichteinkoppelelement 3.3, the fifteenth Lichteinkoppelelement 3.3, the sixteenth Lichteinkoppelelement 3.1, the seventeenth Lichteinkoppelelement 3.1, the eighteenth Lichteinkoppelelement 3.1, the nineteenth Lichteinkoppelelement 3.1, the Twenty-first Lichteinkoppelelement 3.2, the twenty-third Lichteinkoppelelement 3.2, the twenty-fifth Lichteinkoppelelement 3.1, the twenty-sixth Lichteinkoppelelement 3.1, the twenty-seventh Lichteinkoppelelement 3.1 and the twenty-eighth Lichteinkoppelelement 3.3 each having a light sources 22 is assigned.

Die Prinzipdarstellung der Lichtverteilung für die asymmetrische Beleuchtungsvorrichtung nach Fig. 15 zeigt, dass das Licht vorwiegend in eine erste Halbebene abgestrahlt wird. Entsprechend zeigt Fig. 16 eine asymmetrische Lichtverteilung. Die Asymmetrie findet sich auch in der korrespondierenden Lichtstärkeverteilungskurve nach Fig. 17, wobei die Zuordnung der Lichtquellen 22 zu den Lichteinkoppelelementen 3 so erfolgt, dass die Halbebene im Wesentlichen homogen ausgeleuchtet wird. Asymmetrisch bestückte Beleuchtungsvorrichtungen werden beispielsweise für Straßenleuchten vorgesehen, wobei die Straßenleuchte der Straße seitlich zugeordnet ist und das Licht insbesondere in Richtung der Straße abgestrahlt werden soll.The schematic representation of the light distribution for the asymmetric lighting device according to Fig. 15 shows that the light is mainly emitted in a first half-plane. According to shows Fig. 16 an asymmetrical light distribution. The asymmetry can also be found in the corresponding luminous intensity distribution curve Fig. 17 , wherein the assignment of the light sources 22 to the light coupling elements 3 takes place so that the half-plane is substantially homogeneously illuminated. Asymmetrically populated lighting devices are provided for example for street lights, the street lamp is assigned to the street side and the light is to be emitted in particular in the direction of the road.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Optikoptics
22
erste Stirnseitefirst end face
33
Lichteinkoppelelementlight input
3.13.1
eng abstrahlendes Lichteinkoppelelementnarrowly radiating light coupling element
3.23.2
breit abstrahlendes Lichteinkoppelelementbroadly radiating light coupling element
3.33.3
asymmetrisch abstrahlendes Lichteinkoppelelementasymmetrically radiating light coupling element
44
muldenförmige Ausnehmungtrough-shaped recess
55
Lichteinkoppelflächelight injection
5.15.1
zentrale Teilflächecentral subarea
5.25.2
seitliche Teilflächelateral partial surface
5.35.3
seitliche Teilflächelateral partial surface
66
zweite Begrenzungsflächesecond boundary surface
77
zweite Stirnseitesecond end face
88th
LichtaustrittsflächeLight-emitting surface
99
Mittelachsecentral axis
1010
optische Achseoptical axis
1111
Ausnehmungrecess
1212
Lichtauskoppelflächelight coupling
1313
Lichtauskoppelelementlight output element
13.113.1
optisch wirksame Teilflächeoptically effective partial surface
13.213.2
optisch nicht wirksame Teilflächeoptically non-effective partial surface
1414
Flankenwinkelflank angle
1515
umlaufende Nutcircumferential groove
1616
erster Bereichfirst area
1717
zweiter Bereichsecond area
1818
Abstrahlkegelemission cone
1919
Öffnungswinkelopening angle
2020
Abstrahlkegelemission cone
2121
Öffnungswinkelopening angle
2222
Lichtquellelight source
2323
QuermittelachseTransverse centerline
2424
QuermittelachseTransverse centerline
2525
Stegweb

Claims (11)

  1. Optics (1) for a illumination device having multiple light sources (22) comprising:
    - a first region (16) having a light coupling element (3, 3.1, 3.2, 3.3) for each light source (22), which light coupling element bundles light from the light source (22) into bundled beams,
    - a second region (17) in which region the bundled beams are directed on a boundary surface of the optics (1) serving as a light decoupling surface (12) with light decoupling elements (13), and are directed to the outside by total reflection,
    wherein the light coupling elements (3, 3.1, 3.2, 3.3) are arranged in a circumferential region of the optics (1) and wherein the light decoupling elements (13) have a prism structure, characterized in that the prism structure in front of a closely emitting light coupling element (3, 3.1) is set less steep than the same prism structure in front of the widely emitting light coupling element (3, 3.2), and/or a flank angle (14) formed between the central axis (9) and the prism structure is formed less acute in front of the closely emitting light coupling element (3, 3.1) than the flank angle (14) of the same prism structure in front of the widely radiating light coupling element (3, 3.2).
  2. Optics (1) according to claim 1, characterized in that at least one optically effective boundary surface (3, 3.1, 3.2, 3.3) is provided at the light coupling elements (3, 3.1, 3.2, 3.3) and/or that bundled beams are formed by the light coupling elements (3, 3.1, 3.2, 3.3), which form an emission cone (18, 20) with a defined opening angle (19, 21) with relation to an optical axis (10) of the light coupling elements (3, 3.1, 3.2, 3.3) and/or that the bundled beams are totally reflected toward a light exit surface (8), wherein the light exit surface (8) defines a shell side (8) of the optics (1).
  3. Optics (1) according to claim 1 or 2, characterized in that at least two different light coupling elements (3, 3.1, 3.2, 3.3) are provided, which differ with respect to their shape in
    - a light coupling surface (5) formed as a first optically effective boundary surface (5)
    - a shell-side second optically effective boundary surface (6).
  4. Optics (1) according to one of claims 1 to 3, characterized in that at least one closely emitting light coupling element (3, 3.1) emits light in a close first emission cone (18) with a first opening angle (19) of 40° +/- 5° with respect to the optical axis (10) of the light coupling element (3, 3.1), and/or that the at least one widely emitting light coupling element (3, 3.2) emits light in a wide second emission cone (20) with a second opening angle (21) of 70° +/- 5° with respect to the optical axis (10) of the light coupling element (3, 3.2).
  5. Optics (1) according to one of claims 1 to 4, characterized in that the recess (11) being formed in the region of the second front side (7) of the optics, is at least section-wise formed cup-shaped, and/or that the light decoupling surface (12) is at least section-wise formed curved, and/or that the light decoupling elements (13) are formed ring-shaped.
  6. Optics (1) according to one of claims 1 to 5, characterized in that the flank angle (14) of the prism structure is designed in a locally variable manner.
  7. Optics (1) according to one of claims 1 to 6, characterized in that a third kind of light coupling elements (3, 3.3) is provided, which has an asymmetric emission characteristic, and that the third kind of light coupling elements (3, 3.3) is formed such that an emission angle in a first hemisphere is greater than the emission angle in a second hemisphere.
  8. Optics (1) according to one of claims 1 to 7, characterized in that in total twenty-eight light coupling elements (3, 3.1, 3.2, 3.3) are provided in an evenly distributed manner at the circumference of the first front side (2), which light coupling elements are arranged in an evenly distributed manner at an angle of approximately 12,86°, and/or
    - that, when seen in circumferential direction, a first light coupling element (3, 3.1), a sixth light coupling element (3, 3.1), a seventh light coupling element (3, 3.1), an eighth light coupling element (3, 3.1), a ninth light coupling element (3, 3.1), a tenth light coupling element (3, 3.1), a fifteenth light coupling element (3, 3.1), a twentieth light coupling element (3, 3.1), a twenty-first light coupling element (3, 3.1), a twenty-second light coupling element (3, 3.1), a twenty-third light coupling element (3, 3.1), and a twenty-fourth light coupling element (3, 3.1) are formed in the manner of the widely emitting light coupling element (3, 3.1), and/or
    - that a third light coupling element (3, 3.2), a fourth light coupling element (3, 3.2), a fifth light coupling element (3, 3.2), an eleventh light coupling element (3, 3.2), a twelfth light coupling element (3, 3.2), a thirteenth light input (3, 3.2), a seventeenth light coupling element (3, 3.2), an eighteenth light coupling element (3, 3.2), a nineteenth light coupling element (3, 3.2), a twenty-fifth light coupling element (3, 3.2), a twenty-sixth light coupling element (3, 3.2), and a twenty-seventh light coupling element (3, 3.2) are formed in the manner of the closely emitting light coupling element (3, 3.2), and/or
    - that a second light coupling element (3, 3.3), a fourteenth light coupling element (3, 3.3), a sixteenth light coupling element (3, 3.3), and a twenty-eighth light coupling element (3, 3.3) are formed in the manner of the third light coupling element and provide an asymmetrical light distribution.
  9. Illumination device comprising an optics (1) according to one of claims 1 to 8, and comprising a plurality of light-emitting diodes (22) as light sources, wherein a light coupling element (3, 3.1, 3.2, 3.3) is assigned to each light-emitting diode (22), and/or wherein a number of light-emitting diodes (22) is less than the number of light coupling elements (3, 3.1, 3.2, 3.3) of the optics (1).
  10. Illumination device according to claim 9, characterized in that a total of fourteen light-emitting diodes (22) is provided.
  11. Illumination device according to claim 9 or 10, characterized in
    - that in a first operating configuration starting with the first light coupling element (3, 3.2), a light-emitting diode (22) is assigned to each second light coupling element (3, 3.1, 3.2), and/or
    - that in a second operating configuration starting a light-emitting diode (22) is assigned to the first light coupling element (3, 3.2) and the second light coupling element (3, 3.3) and the fourteenth light coupling element (3, 3.3) and the fifteenth light coupling element (3, 3.2) and the sixteenth light coupling element (3, 3.3) and the seventeenth light coupling element (3, 3.1) and the eighteenth light coupling element (3, 3.1) and the nineteenth light coupling element (3, 3.1) and the twenty-first light coupling element (3, 3.2) and the twenty-third light coupling element (3, 3.2) and the twenty-fifth light input (3, 3.1) and the twenty-sixth light coupling element (3, 3.1) and the twenty-seventh light coupling element (3, 3.1) and the twenty-eighth light coupling element (3, 3.3).
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US11193650B2 (en) * 2017-04-26 2021-12-07 Opple Lighting Co., Ltd. Lens and illuminating device employing the same

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