EP3671026B1 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP3671026B1
EP3671026B1 EP19217044.7A EP19217044A EP3671026B1 EP 3671026 B1 EP3671026 B1 EP 3671026B1 EP 19217044 A EP19217044 A EP 19217044A EP 3671026 B1 EP3671026 B1 EP 3671026B1
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EP
European Patent Office
Prior art keywords
lens
lens plate
light
plates
plate
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.)
Active
Application number
EP19217044.7A
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German (de)
English (en)
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EP3671026A1 (fr
Inventor
Matthias Dipl.-Phys. Dr. rer. nat. 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
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Erco GmbH
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    • 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
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • 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
    • 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
    • F21V13/12—Combinations of only three kinds of elements
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of 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
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/107—Outdoor lighting of the exterior of buildings
    • 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
    • F21Y2101/00—Point-like light sources
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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 initially relates to a lamp for illuminating building surfaces.
  • Luminaires of the generic type are, for example, in the patent applications DE 10 2008 063 369 A1 , DE 10 2010 022 477 A1 , DE 10 2009 060 897 A1 , DE 10 2010 008 359 A1 , EP 2 327 927 A1 , DE 10 2012 006 999 A1 , DE 10 2013 011 877 A1 and DE 10 2013 021 308 A1 described, all of which can be traced back to the applicant.
  • lens plates with different lens elements.
  • the beam angle of the lamp can be changed, for example.
  • the object of the invention is to further develop a known lamp in such a way that the lamp allows a change in its emission characteristics in a convenient manner.
  • the invention relates to a lamp according to claim 1.
  • the principle of the invention is to provide three lens plates.
  • the lens plates are connected in series.
  • the light emitted by the focusing optics first penetrates the first lens plate, and then the second lens plate and finally the third lens plate.
  • Each of the three lens plates has a plurality of lens elements.
  • the lens elements are in particular grouped, further in particular arranged in groups according to a predetermined grid or according to a predetermined structure.
  • the middle of the two lens plates is referred to below as the middle lens plate.
  • the outer lens sheet closest to the LED(s) is referred to as the first outer lens sheet and the remaining third lens sheet is called the second outer lens sheet.
  • the lamp comprises at least one focusing lens.
  • a bundling optic is understood to be a device that can bundle the light emitted by the light source.
  • it can be a collimator optics, that is, a lens element that brings about the bundling.
  • the bundling optics can also be provided by a reflector element.
  • the lamp according to the invention also includes at least one adjusting device.
  • the distance between two lens plates in each case can be changed by means of the at least one adjusting device.
  • the lamp comprises a first adjusting device with which the distance between the first outer lens plate and the middle lens plate can be changed, and a second adjusting device with which the distance between the second outer lens plate and the middle lens plate can be changed.
  • the two adjusting devices can advantageously be configured and designed in such a way that the distances between the two outer lens plates and the middle lens plate can each be changed independently of one another. From the invention is however also included if the two adjusting devices are coupled by means of a positive control which ensures that when the distance between the first outer lens plate and the middle lens plate changes, the distance between the second outer lens plate and the middle lens plate also changes automatically.
  • the middle lens plate can also be made for the middle lens plate to be displaceable alone, thereby achieving a relative change in the distance of the middle lens plate from the first outer lens plate and at the same time from the second outer lens plate.
  • the at least one adjustment device can move the first outer lens plate relative to the middle lens plate fixedly arranged on the housing, or alternatively move the middle lens plate relative to the first lens plate fixedly arranged relative to the housing.
  • all three lens plates can be displaced relative to the housing and are displaced relative to one another by the at least one adjustment device, changing their distance.
  • the principle according to the invention also consists in the fact that the lamp provides light distributions that are different from one another when the lens plates are at different distances from one another.
  • the lamp can provide a first emission characteristic, for example a narrow, oval light emission, and with a second different spacing of the pairs of lens plates from each other provide a second light distribution, for example a wider oval light distribution.
  • the luminaire generates a first oval light distribution in a first distance position of a pair of lens plates, which is elongated along a first axial direction, and in a second, changed distance position at least one of the pairs of lens plates from one another generates a second oval light distribution which is elongated along a second axial direction, the second axial direction being perpendicular to the first axial direction.
  • the length of an oval light distribution along a first axial direction can be varied by relative displacement of the first outer lens plate relative to the middle lens plate while the height remains the same, and by relative changing the distance between the second outer lens plate and the middle lens plate in this embodiment, with the height remaining the same, the length of the oval light distribution can be varied in the direction of a second direction perpendicular to the first direction.
  • Luminaires for illuminating building surfaces are considered to be any luminaires that serve as floor, wall or ceiling luminaires of a building, possibly as spotlights or as recessed luminaires, to illuminate a building surface or part of a building. Equally, lights are understood to mean the surfaces of an outdoor area of a building, ie z. B. Parking spaces, green spaces or path areas, can illuminate. Building areas to be illuminated within the meaning of claim 1 also include paintings or art objects to be illuminated.
  • the lamp can for example be designed as a spotlight, and z. B. on the ceiling in a building room or on the floor, also in an outdoor space, be arranged in a variable and lockable position. However, it can also be designed as a downlight, for example, and illuminate floor areas or wall areas of the building space.
  • the lamp includes a housing in which at least the light source is housed.
  • the lamp may also include self-evident components such. B. a base for the light source, z. B. in the case of an LED light source designed as a circuit board, and electronic controls or other electronic components.
  • the lamp can also have a power supply.
  • An integrated or external control gear can be assigned to the luminaire, which is arranged in a separate housing or in the same housing.
  • One or more LEDs are preferably provided as the light source.
  • other light sources such as lasers, can also be considered. Preference is given to using punctiform, or almost punctiform, light sources.
  • COB LEDs i.e. chip on board LEDs
  • a light source can, for example, together with a reflector or together with a collimator, provide focusing optics within the meaning of the invention.
  • the light source forms a unit together with the collimator optics.
  • the collimator optics are used to focus the light emitted by the light source, especially from the LED, emitted light. If an LED is used as the light source, the collimator optics can be conventional collimator optics, as disclosed in the patent rights of the applicant described at the outset, the content of which is hereby included in the disclosure content of this patent application.
  • the light source is also referred to as the light drive together with the bundling optics, in particular the collimator optics.
  • the light drive serves in particular to project parallel, or essentially parallel, light onto the input side of a first lens plate.
  • the three lens plates are transparent or translucent, and consist z. B. made of a transparent plastic, or glass.
  • the lens plates are each made of plastic, e.g. B. made of PMMA, or acrylic glass, or a comparable plastic provided, and can in particular be formed by an injection molded part.
  • the two outer lens plates can be identical or essentially identical in design. Although the two outer lens plates are identical in shape in this embodiment, they can be oriented or positioned differently. In a variant of the invention, all three lens plates are designed differently.
  • the light emitted from the collimating optics enters the entrance surface of the first lens plate and exits through the exit side of the first lens plate. From there it is directed to the entrance side of the second - middle - lens plate, and emerges through the exit surface of the second lens plate. From there it hits the entrance side of the second outer lens plate and subsequently exits again through the exit surface of the second outer lens plate.
  • the lamp can also have a cover glass.
  • the invention particularly includes lights in which no further optical elements are arranged in the light path behind the second outer lens plate.
  • the invention also includes lights in which a diffuser film or comparable elements are also arranged in the light path behind the second outer lens plate.
  • At least one adjusting device is provided.
  • the distance between the two pairs of lens plates can be changed by means of the adjustment device or by means of the two adjustment devices.
  • the adjusting devices can be motor-driven or change the distance between the two pairs of lens plates as a result of manual operation.
  • the adjustment path can be a few millimeters, for example.
  • the pairs of lens plates are each displaceable at least between a first spaced position and a second spaced position.
  • the lamp In a first distance position of the first pair of the two pairs of lens plates, the lamp generates a first light distribution, and in a second, different distance position of the first pair of the two pairs of lens plates - with an unchanged or changed distance position of the second pair of the two pairs of lens plates - the luminaire generates a second distribution that differs from the first.
  • the lamp generates a third light distribution when the spacing of the second pair of the two pairs of lens plates changes—when the spacing of the first pair of the two pairs of lens plates changes or remains unchanged.
  • the different light distributions described can, for example, include different oval light distributions of the lamp, for example a first axially short oval light distribution in a first axial direction, furthermore a second, elongated oval light distribution along the same axial direction, as a third light distribution a first short oval light distribution along a second Axis direction, which is perpendicular to the first axis direction, and as a fourth light distribution, a second, axially elongated oval light distribution along the second axis direction.
  • a first axially short oval light distribution in a first axial direction furthermore a second, elongated oval light distribution along the same axial direction, as a third light distribution a first short oval light distribution along a second Axis direction, which is perpendicular to the first axis direction
  • a fourth light distribution a second, axially elongated oval light distribution along the second axis direction.
  • the distance between each two lens plates can be changed continuously, and more preferably essentially steplessly.
  • the distance between each two lens plates in discrete steps that is, z. B. gradually, changeable.
  • the lens elements of the middle lens plate can be provided, for example, by spherical or aspherically curved facets.
  • a multiplicity of lens elements on the middle lens plate are assigned to each lens element on the first outer lens plate.
  • the light incident on the lens element of the first outer lens plate from the collimator optics is exclusively directed onto a plurality of specific opposing lens elements on the middle lens plate.
  • this one-to-one assignment of the lens elements on the different lens plates is also preserved for different distance positions.
  • the light falling from a lens element of the middle lens plate always strikes only a specific lens element of the second outer lens plate.
  • this assignment can also be retained for different distances between the lens plates.
  • each or almost every lens element on the first outer lens plate is permanently assigned to opposite lens elements on the middle lens plate. Corresponding pairs of opposing lens elements each show the same optical behavior when the lens plates are at different distances from one another.
  • the fixed assignment of one lens element of the first outer lens plate to several lens elements of the middle lens plate is ensured by the fact that in one embodiment of the invention the rotational position of these two lens plates relative to one another is not changed during the change in distance.
  • a positioning device can ensure this.
  • the rotational position of these two lens plates can also undergo a change.
  • the lens elements can each be arranged on one side or else on both sides of at least one of the lens plates.
  • the lens elements are arranged on only one side of the lens sheet, they can be arranged facing each other or arranged opposite each other.
  • the invention also includes when the lens elements of a lens plate are all identical or similar to one another. However, the invention also includes when the lens plates carry different lens elements or multiple groups of different lens elements, with the lens elements of a group being of identical design.
  • the lens elements of a lens plate can have an identical radius, for example, so that all lens elements of a lens plate have an identical focal length.
  • the lens elements of one of the other two lens plates can have the same or a different radius.
  • the focal length of the lens elements of the first outer lens sheet is larger or smaller than the focal length of the lens elements of the middle lens sheet, or larger or smaller than the focal length of the lens elements of the second outer lens sheet.
  • the individual lens elements in particular on the central lens plate, can be provided, for example, by spherical or aspherical curvatures, for example also by paraboloids of revolution.
  • the individual lens elements can be approximately described by a spherical shape or by a radius.
  • the at least one adjusting device comprises at least one motor, in particular an electric motor, drive.
  • An adjustment device is equipped, for example, with an electric motor which can ensure a direct displacement of at least one lens plate relative to at least one other lens plate.
  • the drive can cooperate with a controller that can receive control commands.
  • an actuating device is provided directly on the light, in particular in the housing of the light, or on a housing of the operating device, or in direct association with the light, which allows a user to directly or indirectly control commands to change of the light emission characteristics of the luminaire.
  • the drive can also be controlled via a central lighting control system, e.g. B. from a remote or distanced from the lamp arranged command center, z. B. be addressed by a light control center.
  • the at least one adjustment device includes at least one manually operable adjustment element.
  • z. B. by manual operation, z. B. by a rotary switch, a toggle, a rotatable collar, or another control element or actuator, for a change in distance between two lens plates.
  • the adjusting device is assigned a positioning device which ensures that the relative rotational position between at least two, preferably between all three lens plates is maintained when the distance between the two lens plates is changed.
  • the relative rotational position of at least one lens plate relative to at least one other lens plate is maintained during the change in distance.
  • This can, for example, provide a rotation prevention, the z. B. includes guide rods or corresponding recordings or the like.
  • Axial bearings can also ensure the desired axial movement of the lens plates relative to one another without performing a rotary movement.
  • the different light distributions include different emission angles of the lamp along different axis directions.
  • the different light distributions of the lamp in a first distance position of a first pair of lens plates include a first oval light distribution, which is elongated along a first axial direction.
  • the second oval light distribution can be elongated along a second emission direction, with the second axial direction being perpendicular to the first axial direction.
  • a change in the light distribution according to the invention can, for example, include a change in the emission angle from a first oval, axially short characteristic to a second oval, axially elongated characteristic.
  • An oval light emission characteristic within the meaning of the present patent application includes, in particular, a light distribution with a contour that is longer in a first direction than in a second direction perpendicular to the first direction.
  • the beam angle or angle specification of a light distribution within the meaning of the present invention refers in particular to that angle which is referred to as the opening angle in the professional sense and represents the so-called “full width half max" value. This is therefore the value of the light emission angle at which the light intensity has fallen to about half the maximum light intensity.
  • a contour of a light distribution is the course of this “full width half max” value that can be seen and/or measured on the building surface to be radiated.
  • the respective distance between the lens plates of a pair of lens plates can be changed continuously. This can be guaranteed by a steplessly operating adjustment device.
  • a continuous change in the distance between the two lens plates a continuous change in the Emission characteristics of the lamp, in particular a continuous change in the emission angle or a continuous change in the ovality or ovacity of the emission characteristics or the oval light distribution, can be achieved.
  • At least one of the three lens plates is fixed relative to the housing, and the other two lens plates can be displaced relative to the middle lens plate and/or relative to the housing by means of at least one adjusting device.
  • the lens elements on at least one of the three lens plates include facets.
  • the facets are curved. All or almost all lens elements are advantageously designed as facets. All or almost all of the facets are also advantageously of identical design.
  • the facets can be spherical or aspherically curved. In particular, they can also be approximated to a sphere. Furthermore, the facets can be provided by a paraboloid of revolution and have, for example, a parabolic or essentially parabolic cross-section.
  • a focal length can be assigned to a lens element. It can advantageously be provided that the same or almost the same focal length is assigned to each or nearly each of the lens elements.
  • the adjustment path, along which the distance between two lens plates can be changed from one another is approximately on the order of two focal lengths. This means that two lens plates can be displaced relative to one another between a first spaced position, in which they contact one another, and a second spaced position, in which they are approximately two focal lengths apart.
  • At least one lens element of one lens plate is assigned to at least one lens element of the other lens plate.
  • the assignment can in particular be fixed. This means that the assignment is maintained even when the distance between two lens plates changes.
  • the light falling from the collimator optics onto a specific lens element of the first outer lens plate is directed exclusively to a plurality of specific opposite lens elements of the middle lens plate.
  • it can also advantageously be provided that the light emitted by a lens element of the middle lens plate is always thrown onto a specific lens element of the second outer lens plate.
  • Another advantage is that this fixed assignment cannot be changed along the entire adjustment path.
  • the assignment is made such that light components emanating from the collimator optics strike a lens element of the first outer lens plate and are only directed to specific lens elements of the middle lens plate.
  • the assignment of the lens elements of the first outer lens element to the lens elements of the middle lens plate is maintained when the distance between the lens plates changes.
  • the lens elements on a first outer lens sheet and on a second outer lens sheet comprise lenticular lenses or lenticular facets. These are axially elongated, cylindrical facets which are curved along a first plane and are not curved, or at most slightly or slightly curved, along a second plane which is transverse thereto.
  • the lamp has three lens plates, a first outer lens plate, a middle lens plate and a second outer lens plate.
  • Lenticular lenses are advantageously arranged on the two outer lens plates.
  • the middle lens plate advantageously has lenticular facets.
  • the lenticular lenses of the first outer lens sheet are elongated in a first direction and the lenticular lenses of the second outer lens sheet are elongated along a second direction, the second direction being perpendicular to the first direction.
  • oval light distributions of different widths can be generated in two different, mutually perpendicular axis directions.
  • Circular or approximately circular or square or approximately square or rectangular or essentially rectangular light distributions or light field contours can also be generated by superimposing two oval distributions.
  • the three lens plates are fixed in a relative rotational position to one another, so that their rotational position does not change when the lens plates are displaced axially.
  • the rotational position of at least one of the three lens plates can be changed relative to at least one other of the three lens plates.
  • the luminaire is characterized in that the lenticular lenses on the first outer lens plate extend along a first direction, and that the lenticular lenses on the second outer lens plate extend along a second direction, the second direction being perpendicular to the first direction.
  • the lamp is characterized in that the relative distance between the first outer lens plate and the middle lens plate can be changed by means of a first adjusting device independently of the relative distance between the second outer lens plate and the middle lens plate, which can be changed by means of a second adjusting device.
  • a lamp 10 having a housing 11 is shown only very schematically.
  • An LED 12 is arranged on a printed circuit board 13, which is indicated schematically, within the housing 11, which is only shown broken off and indicated.
  • the LED is powered via power supply lines (not shown) (in 10 e.g. B. denoted by 14) supplied with the required operating voltage.
  • power supply lines not shown
  • Other electronic components that are provided to generate the operating voltage required for the LED are not shown for the sake of simplicity.
  • the LED emits light distributed over a large solid angle range of, for example, 180°. This should be indicated by the light rays 55a, 55b, 55c.
  • the LED 12 is located in a cavity 57 of a collimator optics 15 providing a bundling optics.
  • the collimator optics 15 comprises total reflection surfaces 58 and a ceiling section 59. Overall, the collimator optics 15 together with the LED 12 represent a light drive that serves to generate a substantially parallel light beam 27 .
  • a first outer lens plate 18, a middle lens plate 19 and a second outer lens plate 74 are arranged inside the lamp housing 11.
  • the parallel light beam 27 emitted by the LED 12 or by the exit surface 56 of the collimator optics 15 falls as a parallel partial light beam 60 onto the light entry surface 28 of the first outer lens plate 18, passes through it and emerges in the area of the light exit surface 29 of the first outer lens plate 18. From there, the light falls on the light entry surface 30 of the middle lens plate 19 and exits through the light exit surface 31 of the middle lens plate 19 .
  • the light falls on the entrance side of a third lens plate, namely the second outer lens plate 74, and exits through the light exit surface thereof.
  • No further optical element is arranged in the light path behind the second outer lens plate 74 in the exemplary embodiments of the lamp according to the invention shown in the figures. From there, the light can hit directly onto a building area 17 to be illuminated, which is only shown schematically and not to scale in Fig. 1a is indicated.
  • no cover glass or the like is provided in the area of the light exit opening 16 of the lamp 10 .
  • the second outer lens plate 74 can function as a type of cover glass for the lamp 16 .
  • the distance between the first outer lens plate 18 and the middle lens plate 19 is denoted by 32 in the figures.
  • z. B the distance between the light entry surface 29 of the first outer lens plate 18 and the light entry surface 30 of the middle lens plate 19.
  • Other reference points are also covered by the invention.
  • the distance between the middle lens plate 19 and the second outer lens plate 74 is denoted by 75 in the figures.
  • the distance 32 between the two lens plates 18, 19 can be changed by means of a first adjusting device 20a.
  • the distance 75 between the middle lens plate 19 and the second outer lens plate 74 can also be changed with a second adjusting device 20b.
  • the two adjusting devices 20a, 20b can each comprise one or a common motor drive 21, which in Fig. 1a is only indicated.
  • the motorized drive 21 can, for example, receive control commands from a lamp controller via a signal or control line (not shown).
  • the adjusting devices 20a, 20b can each also include a manually addressable actuating element and can dispense with a motor drive entirely.
  • Such a manually operable element for changing the distance is for example in the Figures 10 to 13 the German patent application DE 10 2017 122 956 A1 disclosed by the applicant, so that reference is made to the descriptions there to avoid repetition.
  • the design of the adjusting device is not important.
  • the invention is basically about the fact that the three lens plates 18, 19, 74 can be displaced relative to one another in the axial direction Y by changing their distances 32, 75 from one another.
  • Fig. 1a Evidence of the embodiment of Fig. 1a combined with 4 it can be seen that along the light entry surface 28 of the first outer lens plate 18, a plurality of lens elements elongated in the X direction, so-called lenticular lenses, in the form of elongated lens elements 22a, 22b, 22c are arranged.
  • the lens elements 22a, 22b, 22c in the form of elongated lens elements are arranged immediately adjacent to one another.
  • the invention also includes when small distances are provided between the lens elements 22a, 22b, 22c.
  • a plurality of lens elements 23a, 23b, 23c are also arranged on the central lens plate 19.
  • the middle lens plate 19 can comprise individual facets 23a, 23b, 23c, each having a spherical cross-section, and accordingly, for example, of a spherically curved body, z. B. are formed a spherical section or such a body are approximated.
  • the facets can also come from a body with a different curvature, e.g. B. an aspheric curvature formed.
  • the individual facets can each have a parabola-shaped cross section and accordingly be formed as a paraboloid of revolution.
  • a focal length 25 is assigned to each of the lenticular lens elements 22a, 22b, 22c. This means that an incident bundle of rays 60 of parallel light z. B. according to Fig. 1a falls on the lenticular lens element 22b, in a focal line 61 perpendicular to the plane of the paper Fig. 1a runs, bundles. This is where the individual rays of light intersect.
  • the light diverges from the focal line 61 and falls on the lens element 23b on the middle lens plate 19. Since the facet 23b - in the plane of the paper Fig. 1a - to the lens 22b of the first outer lens plate 18 identical is curved, you can assign an identical focal length 26.
  • the focal length 25 of the lens 22b of the first outer lens plate 18 and the focal length 26 of the facet 23b of the middle lens plate 19 are therefore identical.
  • Fig. 1a shows a spacing of the two lens plates 18, 19 at a distance 32 which corresponds to twice or approximately twice the focal length 25 (ie at the same time also twice the focal length 26).
  • the partial light beam 63 emanating from the focal line 61 and impinging on the facet 23b is collimated again by the facet 23b and transformed into a parallel light beam 64 .
  • This parallel bundle of light rays 64 then strikes the third lens plate 74, i.e. the second outer lens plate 74, and—at least when viewed from the plane of the paper in Fig. 1a - not affected in its beam path.
  • a linear guide 62 indicates.
  • the first outer lens plate 18 is movably arranged relative to the housing 11, and the middle lens plate 19 is fixed relative to the housing 11.
  • the first outer lens plate 18 can be displaced along the linear guide 62 in the axial direction Y with the aid of the adjustment device 20a.
  • the second outer lens plate 74 can also be displaced in the axial direction Y relative to the fixed central lens plate 19 with the aid of the second adjusting device 20b.
  • the lens elements 22a, 22b, 22c, 23a, 23b, 23c on the first outer lens plate 18 and on the middle lens plate 19 are each arranged on the light entry side 28, 30, and the light exit surface 29, 31 of the respective Lens plate 18, 19 is kept flat.
  • the respective lens plates 18, 19 can also be oriented differently, so that z. B. the lens elements are arranged on the light exit side 29, 31, and the respective light entry side 28, 30 is kept free of lens elements.
  • the orientation of the lens elements 22a, 22b, 22c, 23a, 23b, 23c in relation to the light source 12 is not important.
  • the lamp 10 can have a substantially circular light exit opening 16, and accordingly the three lens plates 18, 19, 74 are in the shape of a circular disk.
  • the invention is not restricted to this geometry.
  • the invention also includes lights that have a square or rectangular or another, z. B. polygonal curve having light exit opening.
  • each lamp has three collimator optics 15a, 15b, 15c.
  • 15, 15a, 15b, 15c is arbitrary. It also depends in particular on the number and the design of the LEDs.
  • each collimator optics 15 (and thus also each LED 12) is assigned a large number of individual lens elements 23a, 23b, 23c.
  • each collimator optics 15 or each LED 12 is assigned a plurality of lens elements 23a, 23b, 23c, the structure of the light source 12 can be resolved and is no longer recognizable to an observer in the room. Likewise, the structures of the LED or the collimator optics are no longer recognizable in the light distribution on the building wall 17 .
  • the light distribution on the building wall is homogeneous.
  • the first outer lens plate 18 and the second outer lens plate 74 are each of identical design, but are arranged rotated by 90° relative to one another.
  • the respective lenticular lenses 22a, 22b, 22c and 76a, 76b, 76c extend in mutually perpendicular directions X and Y.
  • the two lens plates 18, 19 are, as in Fig. 1a shown, positioned axially spaced from each other so that each lenticular lens element 22a, 22b, 22c of the first outer lens plate 18 has a plurality of specific lens elements 23a, 23b, 23c of the middle Lens plate 19 are permanently assigned. Hence that's how it is Fig. 1a the lens element 22b of the first outer lens plate 18 is always assigned to the lens element 23b of the middle lens plate 19. Advantageously, this fixed assignment also remains in place during and/or after a change in the distance between the two lens plates 18, 19 has been carried out.
  • a lens element 76a, 76b, 76c of the second outer lens plate 74 is always permanently assigned to each lens element 23a, 23b, 23c of the middle lens plate 19.
  • FIG. 8a, 8b to 10a, 10b can with the aid of the adjustment device 20a in one embodiment of the invention, a change in the distance 32 between the first outer lens plate 18 and the middle lens plate 19 from a distance according to 10a, 10b , which corresponds to a minimum distance, and where there is, or can be, near contact between the entrance side 30 of the middle lens sheet 19 and the exit side 29 of the first outer lens sheet 18, and a second, maximum distance 32 according to Figures 8a, 8b ,
  • the two lens plates 18, 19 being spaced apart from each other by approximately twice the focal length 25, 26.
  • the shift can be done by the adjusting device 20a z. B. continuously, in particular steplessly.
  • the beam angle 37 is minimal. He is according to the schematic representation of Figure 8a 0° because it is parallel light. Indeed, with regard to the large, in Fig. 1a If the actual distance between the building surface 17 and the lamp 10 is not shown to scale, the beam angle 37 is about 12 to 16°, for example. This emission angle already corresponds to the emission angle of the light emitted by the collimator optics 15 .
  • the two lens plates 18, 19 are moved towards one another, reducing the distance 32, and for example an intermediate position according to FIG 9a, 9b is reached with a distance 32, the middle lens plate 19 can no longer maximally focus the light received from the first outer lens plate 18.
  • 9a, 9b 1 illustrates that the lens element 23b can only collimate the bundle of light rays received from the lens element 22b to a lesser extent, and a second emission angle 38 is accordingly provided. This second beam angle 38 is larger than the first beam angle 37.
  • the light cone is demonstrably the 9c - According to the distance position of the lens plates 18, 19 according Figure 9a - already expanded.
  • the width 51b according to the light distribution 9c is according to the width 51 of the light distribution Figure 8c greater.
  • the two lens plates 18, 19 are moved even further towards each other, and a contact or almost a contact position according to 10a, 10b reached, the middle lens plate 19 no longer focuses the light received from the first lens plate 18, or almost no focusing at all instead of.
  • the emission angle 39 is considerably larger than the emission angle 38 in the distance position according to FIG Figures 8a, 8b, 9a, 9b .
  • the light distribution on the wall 17 according to Figure 10c consequently has an even larger width 51c compared to the light distribution curve 17 according to FIG Figure 8c , on.
  • the circumferential position of rotation of the middle lens plate 19 relative to the first lens plate 18 is maintained during the change in distance, even during the adjustment process. This ensures that the fixed assignment of a particular lens element 22a, 22b, 22c on the first outer lens plate 18 to a plurality of particular lens elements 23a, 23b, 23c on the middle lens plate 19 is maintained for different distances 32.
  • the first outer lens plate 18 has lenticular lenses in this embodiment. These are cylindrical lenses that are cut along a first cutting plane (cf. figure 5 ) have spherical or aspheric curvatures, and those along a second perpendicular to the first cutting plane Cutting plane are not curved. To this extent, the lenticular lenses 22a, 22b, 22c are of cylindrical design and are aligned parallel to one another.
  • the second outer lens plate 74 also has lenticular lenses, which are designated by the reference numerals 76a, 76b, 76c, merely by way of example.
  • the lenticular lenses of the second outer lens sheet 74 are arranged along a direction W, which is perpendicular to the direction X, along the lenticular lens elements 22a, 22b, 22c of the first outer lens sheet 18 according to FIGS Figures 4 and 5 are arranged.
  • the Figures 11a to 13c show three different distances between the middle lens plate 19 and the second outer lens plate 74, as well as the light distribution generated in each case on the building surface 17.
  • the lamp generates an oval light distribution at different distance positions of the two lens plates 19, 74.
  • an oval light distribution or illuminance distribution on the wall 17 is understood in the professionally usual sense, a light distribution that is one of a circular shape of a light distribution, such as according to Figure 8c shown, deviating contour 53 has.
  • Figure 12c an oval light distribution 34 with a correspondingly oval contour 53a, and a light distribution—represented in simplified form—which has a width 51 of the light distribution and a height 52b of the light distribution.
  • the light distribution is therefore oval, or approximately elliptical.
  • the exact contour 53a of the light distribution 34 depends, of course, on the radii of curvature used for the lens elements.
  • the decisive factor is that the light distribution 34 changes in height 52 is changed, and consequently the beam angle 38b, 39b in the cutting plane of Figures 11b, 12b is thereby increased.
  • the Figures 14a and 14b show a maximum distance position that Figures 16a and 16b a contact position and the Figures 15a and 15b an intermediate position.
  • the light distribution 34 according to the Figures 14c, 15c and 16c correspond to the spacing positions of the lens plates.
  • insofar oval light distributions can be achieved whose ovality, ie their degree of ovality, is adjustable.
  • the width of the oval light distribution or the height of the along different axis directions be adjustable oval light distribution.
  • the light can also be used to produce a light distribution that deviates from the oval light distribution, e.g. B. be generated in the manner of a circle or a rounded square.
  • the invention also includes exemplary embodiments of lights with which light field contours other than those shown can be generated.
  • FIG. 17 shows in a representation according to 4 another embodiment of a first outer lens plate 18, which now has so-called lenticular facets 54a, 54b, 54c. These are facets that can have a more complex curvature, for example.
  • facets 54a, 54b, 54c can be arranged along a predetermined grid. It can be provided in particular that the arrangement of these facets 54a, 54b, 54c according to the representation of 17 occurs along a grid that has rows and columns. The number of columns can be dimensioned in such a way that it corresponds to the number of lenticular lenses in a lens plate 18 4 is equivalent to.
  • Each column of this facet arrangement can be subdivided into a large number of individual facets.
  • These lenticular facets can have a particularly curved surface with two different radii of curvature.
  • ID 18 becomes a single lenticular facet 54 from the lens sheet 18 according to FIG 17 viewed in enlarged detail.
  • the two sectional views of Figures 19 and 20 make it clear that different radii of curvature can be provided along different sectional planes perpendicular to one another. For the sake of simplicity, it is assumed that all the facets 54a, 54b, 54c of the lens plate 18 are of identical design.
  • the invention also includes when entirely different facets, e.g. B. with the help of simulations calculated free-form bodies are arranged.
  • a lens sheet having lenticular lens facets, as described in 17 is shown can also be provided as a middle lens plate 19 or as a second outer lens plate 74 in exemplary embodiments of the invention.
  • the distance between the three lens plates 18, 19, 74 is changed by means of an axial movement, the lens plates being aligned parallel to one another in each distance position.
  • the invention also includes when, instead of such a change in distance between the lens plates 18, 19, 74, a displacement movement is carried out by means of the adjusting device 20a, 20b in such a way that, in addition to an axially directed, parallel displacement movement, or alternatively to such a movement, a change in the distance between the lens plates 18, 19, 74 relative to one another takes place in that one of the lens plates 18, 19, 74 is rotated relative to a different lens plate 19, 18, 74, is tilted or tilted, or subjected to another, possibly more complicated, movement.
  • the invention also includes exemplary embodiments in which this assignment is canceled in the course of a change in distance and, for example, different lens elements of a first lens plate are assigned to different lens elements of a second lens plate in discrete different distance positions.
  • the procedure for changing the radiation characteristics of a luminaire can be carried out as follows: Suppose that a work of art of a certain format is illuminated in a museum by means of a lamp according to the invention for the duration of a temporary exhibition. After the end of this exhibition, a new work of art with a different format will be illuminated by the same luminaire on the same or a different building surface.
  • the distance between the three lens plates 18, 19, 74 can be changed by an operator in the desired manner using the adjusting devices 20a, 20b.
  • the light distribution or the emission characteristics of the lamp can be changed without having to exchange or replace elements of the lamp, or even without having to exchange or replace the light head of the lamp.
  • an axial displacement of the first outer lens plate 18 and/or the second outer lens plate 74 takes place relative to the middle lens plate 19 along an adjustment path which is approximately twice the focal length 25 of the lens elements 22a, 22b, 22c, 76a, 76b, 76c of the first outer lens plate 18 and the second outer lens plate 74.
  • the invention also includes exemplary embodiments in which the adjustment path provided by the adjustment device 20a, 20b for changing the distance 32, 75 between the lens plates 18, 19, 74 is slightly or significantly larger or slightly or significantly smaller .
  • the travel path to be provided at the adjusting device 20a can be based on the focal length or twice the focal length 25 of one of the facets 22a, 22b, 22c.
  • the travel path to be provided by the adjustment device 20a, 20b is advantageously dimensioned in such a way that a change in distance between a pair of lens plates 18, 19, 74 is provided between a first optimized distance, in which a minimum emission angle, i.e. light directed almost parallel, is generated, and a second distance position, which generates a maximum emission angle, predetermined by the curvature of the lens elements.
  • detent positions can also be specified along the travel path, i.e. positions in which the distance positions between the lens plates 18, 19, 74 are recognized or can be determined by an operator or by an electronic or mechanical sensor or a control unit. As a result, it can be ruled out, for example, that specific intermediate positions between predetermined latching positions are not reached.
  • lens elements 23a, 23b, 23c can be used which are designed aspherically but can be approximately described by a sphere, the sphere z.
  • adjustment paths to be provided by the adjustment device 20 along which a change in the distance between the lens plates 18, 19, 74 can take place, adjustment paths of between 2 and 40 mm are provided, for example, adjustment paths of approximately 4 to 6 mm.
  • the collimator optics 15 has a cavity 57, total reflection surfaces 58 and a ceiling area 59, ie a conventional lens in the center of the collimator optics 15.
  • the invention also encompasses differently designed, suitable collimator optics, which bundle the light emitted by the corresponding light source.
  • conventional lens plates 18, 19, 74 can be used, which has been used by the applicant for some time, e.g. B. as tertiary optics in lights application.
  • a bundling optics 66 is provided, the bundling optics 66 of 1 replaced.
  • a reflector 68 is provided as the bundling optics 66, which interacts with an arrangement of a chip-on-board LED 67, which is arranged inside the reflector 68, or with which a reflector 68 is assigned.
  • the reflector 68 together with the chip on board LED 67 also emits a light beam 27 of parallel or approximately parallel light.
  • the arrangement of the three lens plates 18, 19, 74 can in the embodiment of 21 be taken equally, as in the embodiment of 1 .
  • the light distribution of the lamp 10 corresponds to different distances 32 to the changed light distributions resulting from the Figures 8a-16c result.
  • FIG. 22 Another exemplary embodiment of a lamp 10 according to the invention 22 provides a bundling optics 66, which has a collimator optics 15d with lens elements 70a, 70b, 70c arranged directly thereon in the manner of lenticular lenses.
  • the lens elements 70a, 70b, 70c are thus arranged on the light exit side 56 of the collimator optics 15d, which--unlike in the exemplary embodiment of FIG Fig. 1a - Is not kept smooth, but has the plurality of lens elements 70a, 70b, 70c.
  • Using an exemplary light beam 71 can 22 be taken that the light emission of this lamp that of the embodiment of Fig. 1a is equivalent to.
  • the second lens plate 19b of the embodiment of FIG 22 corresponds to the middle lens plate 19 of the embodiment of FIG Fig. 1a .
  • the fact that here the lens elements 23a, 23b, 23c are arranged on the light exit side 31 of the lens plate 19b and the light entry side 30 is kept flat is irrelevant.
  • the orientation of the middle lens plate 19b could in the embodiment of the 22 also be hit the other way around.
  • the lens plate 19b can also cover a large number of corresponding collimator optics 15d.
  • Circular, concentrically arranged lenticular lens elements 69a, 69b, 69c are provided here.
  • a middle lens plate 19 as shown in FIG 23 is shown. It arises from this For example, the same cross-sectional view as shown in Fig. 1a is indicated schematically, not to scale.
  • one or more of the three lens plates 18, 19, 19b, 74 are curved or arched differently than shown in the different exemplary embodiments of the patent application.
  • the lens plates 18, 19, 74 can each be aligned along a plane, as shown in the drawings.
  • the lens elements of a pair of adjacent lens plates can also be arranged facing away from each other, so that z. B. the lens elements 22a, 22b, 22c of the first outer lens plate 18 face the collimator optics 15 and the lens elements 23a, 23b, 23b of the middle lens plate 19 are arranged on the side of the second lens plate 19 which faces away from the collimator optics 15.
  • the embodiment of 26 Finally, the basic structure of the embodiment of the attacks 24 on: Here are, however, in contrast to the embodiment of 24 , The lens elements 22a, 22b, 22c of the first outer lens plate 18 are equipped with a first radius, so that the corresponding lens elements 22a, 22b, 22c can be assigned a first focal length 25.
  • the lens elements 23a, 23b, 23c of the middle lens plate 19 have a smaller radius, so that each lens element 23a, 23b, 23c of the middle lens plate 19 can be assigned a focal length 26 that is smaller than the focal length 25. This is a special one advantageous embodiment.
  • the group of features according to which the lens elements 22a, 22b, 22c of the first outer lens plate 18 all or the majority, or at least on average, have a larger radius and/or a larger focal length than the lens elements 23a, 23b, 23c of the middle lens plate 19 , can be advantageously used in all embodiments according to the invention.
  • the advantage of this special geometry is, among other things, that the light beam bundle emitted by a specific lens element (e.g. 22b) of the first lens plate 18 actually hits with a high degree of certainty only specific correspondingly opposite lens elements 23 of the middle lens plate 19.
  • the differences in focal lengths or the differences in mean or average focal lengths between the lens elements 22a, 22b, 22c of the first outer lens plate 18 and the lens elements 76a, 76b of the second outer lens plate 74 and the lens elements 23a, 23b, 23c of the middle lens plate 19 can be several millimeters.
  • the focal length of the lens elements 22a, 22b, 22c of the first outer lens plate 18 can be between 3 mm and 10 mm
  • the focal length 26 of the lens elements 23a, 23b, 23c of the middle lens plate 19 can be between 0.5 mm and 2.9 mm be.
  • each rotationally parabolic lens element 23e can be approximately described by a circular shape 73.
  • a radius R can be assigned to this circular shape 73 .
  • the light rays entering within this cap area of a facet 23 are in the cap area - for example - focused on a common focal point 61 out.

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Claims (10)

  1. Luminaire (10) pour éclairer des surfaces de bâtiment (17) ou des surfaces partielles de bâtiment, comprenant un boîtier (11), au moins une source de lumière, en particulier une DEL (12, 12a, 12b, 12c), et au moins une optique de focalisation, en particulier une optique de collimation (15, 15a, 15b, 15c) pour la concentration de la lumière émise par la source de lumière, dans lequel une première plaque de lentilles extérieure (18), une plaque de lentilles centrale (19) et une seconde plaque de lentilles extérieure (74) sont disposées dans le chemin de lumière derrière l'optique de focalisation et comportent chacune une pluralité d'éléments de lentille (22a, 22b, 22c, 23a, 23b, 23c, 69a, 69b, 69c, 70a, 70b, 70c), dans lequel les distances relatives (32, 75) de l'une des deux plaques de lentilles extérieures par rapport à la plaque de lentilles centrale peut être modifiées à l'aide d'au moins un dispositif de réglage (20), dans lequel le luminaire exécute différentes répartitions de lumière (37, 38, 39, 50a, 50b, 50c) dans différentes positions d'espacement des plaques de lentilles les unes par rapport aux autres, dans lequel les éléments de lentille de la plaque de lentilles centrale (19) sont formés par des facettes incurvées dont la courbure est de forme sphérique ou de forme approximativement sphérique et/ou sont formés par un paraboloïde de rotation, dans lequel les éléments de lentille sur les deux plaques de lentilles extérieures (18, 74) comprennent des lentilles lenticulaires (22, 76) et/ou des sections de lentilles lenticulaires (54a, 54b, 54c), et dans lequel les lentilles lenticulaires de la première plaque de lentilles extérieure sont allongées le long d'une première direction et les lentilles lenticulaires de la seconde plaque de lentilles extérieure sont allongées le long d'une seconde direction, la seconde direction étant perpendiculaire à la première direction.
  2. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un dispositif de positionnement est associé audit au moins un dispositif de réglage (20a, 20b), dispositif de positionnement qui, lorsque la distance entre respectivement deux des trois plaques de lentilles (18, 19, 74) est modifiée, assure un maintien de la position de rotation relative entre au moins deux des trois plaques de lentilles, en particulier un maintien de la position de rotation relative entre l'ensemble des trois plaques de lentilles.
  3. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que les différentes répartitions de lumières comprennent une première répartition de lumière ovale longitudinale suivant une première direction axiale et une seconde répartition de lumière ovale longitudinale suivant une seconde direction axiale, la seconde direction axiale étant perpendiculaire à la première direction axiale.
  4. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que le luminaire exécute des répartitions de lumière ovales différentes dans différentes positions d'espacement des plaques de lentilles (18, 19, 74) les unes par rapport aux autres.
  5. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que les distances (32) entre les paires (18, 19 ; 19, 74) de plaques de lentilles (18, 19, 74) peuvent être modifiées de façon continue.
  6. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que l'une des trois plaques de lentilles (18, 19, 74), en particulier la plaque de lentilles centrale (19), est disposée de façon fixe par rapport au boîtier (11), alors que les deux autres plaques de lentilles (19, 74) peuvent être déplacées par rapport au boîtier (11) et/ou par rapport à la plaque de lentilles centrale (19) par l'intermédiaire dudit au moins un dispositif de réglage (20a, 20b).
  7. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque élément de lentille (22b) d'une première plaque de lentilles extérieure (18) est associé à au moins un élément de lentille (23b) de la plaque de lentilles centrale (19).
  8. Luminaire selon la revendication 7, caractérisé en ce que la répartition est exécutée de telle sorte que des fractions de lumière qui, émanant de l'optique de focalisation (15) frappent un élément de lentille (22b) de la première plaque de lentilles extérieure (18), soient dirigées par ce dernier uniquement en direction de certains éléments de lentille (23b) de la plaque de lentilles centrale (19), et de telle sorte que des fractions de lumière émises par un élément de lentille (23b) de la plaque de lentilles centrale (19) soient dirigées par ce dernier uniquement en direction d'un élément de lentille déterminé (76b) de la seconde plaque de lentilles extérieure (74).
  9. Luminaire selon la revendication 7 ou 8, caractérisé en ce que la répartition est conservée en cas de modification de la distance (32, 75) entre les plaques de lentilles (18, 19, 74).
  10. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que ce dernier est pourvu d'une commande forcée qui, en cas de modification de la distance relative (32) entre la première plaque de lentilles extérieure (18) et la plaque de lentilles centrale (19), assure simultanément une modification de la distance relative (75) entre la seconde plaque de lentilles extérieure (74) et la plaque de lentilles centrale (19).
EP19217044.7A 2018-12-21 2019-12-17 Luminaire Active EP3671026B1 (fr)

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EP3671026A1 (fr) 2020-06-24
US20200240612A1 (en) 2020-07-30
CN111351006B (zh) 2022-09-16
ES2943024T3 (es) 2023-06-08
US11149920B2 (en) 2021-10-19
CN111351006A (zh) 2020-06-30
DE102018133386A1 (de) 2020-06-25

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