WO2022058425A1 - Système d'éclairage, panneau de lentille pour un tel système d'éclairage et procédé de réalisation d'un tel panneau de lentille - Google Patents

Système d'éclairage, panneau de lentille pour un tel système d'éclairage et procédé de réalisation d'un tel panneau de lentille Download PDF

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Publication number
WO2022058425A1
WO2022058425A1 PCT/EP2021/075481 EP2021075481W WO2022058425A1 WO 2022058425 A1 WO2022058425 A1 WO 2022058425A1 EP 2021075481 W EP2021075481 W EP 2021075481W WO 2022058425 A1 WO2022058425 A1 WO 2022058425A1
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WO
WIPO (PCT)
Prior art keywords
lens
solid state
illumination system
state lighting
panel
Prior art date
Application number
PCT/EP2021/075481
Other languages
English (en)
Inventor
Andrzej SZYMANIUK
Original Assignee
Signify Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signify Holding B.V. filed Critical Signify Holding B.V.
Publication of WO2022058425A1 publication Critical patent/WO2022058425A1/fr

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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
    • 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
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/003—Light absorbing elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • 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
    • F21W2131/105—Outdoor lighting of arenas or the like
    • 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
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/16—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array square or rectangular, e.g. for light panels
    • 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

  • An illumination system a lens panel for such illumination system and a method for realizing such lens panel
  • the invention relates to an illumination system or luminaire suitable but not exclusively for open field lighting applications, such as sports fields, the illumination system comprising a plurality of spatially separated solid state lighting elements, with each solid state lighting element associated with a lens element arranged to shape a luminous distribution around an optical axis of the solid state lighting element.
  • the invention also relates to a lens panel at least composed of a plurality of such lens elements. Furthermore the invention pertains to a method for realizing optic features in such lens panel.
  • Solid state lighting e.g. LED lighting
  • traditional lighting e.g. incandescent lighting, fluorescent lighting and halogen lighting.
  • market penetration of such SSL devices is not without challenges. For example, a serious challenge is to provide a luminaire including SSL elements that offers the same visual experience as such traditional light sources.
  • Such challenge is for example found in the field of open field lighting applications, for example the lighting of large areas such as sports fields, where sport events or other venue events, such as music concerts or festivals are held or performed.
  • a major task or challenge of an event lighting system is to illuminate the area in which the event, e.g. a sporting game, is taking place, such, that symmetrical lighting conditions are ensured for optimal sporting conditions.
  • the illumination of the area must create optimal circumstances for high quality (digital) video registration by media outlets, but also must not create nuisance glare for the participants on the field (such as players/officials, etc.) and must not generate any spill light or spill glare to the spectators around the field and surrounding environment.
  • the plurality of spatially separated solid state lighting elements act as point sources. With the aid of a lens panel composed of a plurality of lens elements, each interacting with one of these plurality of solid state lighting element, a luminous distribution around the optical axis of each solid state lighting element is shaped, with the overall luminous distribution generated by the whole illumination system being directed towards the large area.
  • the present disclosure provides an illumination system as well as a lens panel for use in an illumination system, which both provides a solution for the problem of spill light or spill glare outlined above. Additionally, this disclosure aims at providing a method for modifying or adapting lens panels already installed in illumination systems, which lens panels suffer from the problem of spill light or spill glare discussed above.
  • an illumination system comprising a support structure, a plurality of spatially separated solid state lighting elements mounted on the support structure for emitting visible light, a lens panel extending over the solid state elements, the lens panel being made from a visible light transmissive material and composed of a plurality of lens elements covering the plurality of solid state lighting elements, and intermediate panel sections interconnecting the plurality of lens elements, wherein each of the plurality of lens elements is arranged to shape a luminous distribution around an optical axis of the associated solid state lighting element, wherein the lens panel is provided with optic features as part of the intermediate panel sections and configured, during operation of the illumination system, to limit the transmission of visible light emitted by a solid state lighting element in a direction sideways from its optical axis towards the lens element covering a neighboring solid state lighting element, wherein the optic features are formed as a cut out element provided in a surface of the intermediate panel section facing away from the support structure to promote the transmission of the in sideways direction emitted visible light in
  • the lens panel extending over the solid state elements can be obtained for example by the lens panel being disposed or mounted on the support structure over said solid state elements.
  • the plurality of lens elements covering the plurality of solid state lighting elements could be, for example, that each lens element is in optical communication with only a respective one of the solid state elements, or covering only a respective one of the solid state elements, thus forming a plurality of respective pairs of a single lens with a respective single a solid state element.
  • the optic features are configured to promote the transmission of the in sideways direction emitted visible light in a direction away from the plurality of lens elements. This completely limits any spill light or spill glare from exiting or escaping the illumination system.
  • the optic features are part of the intermediate panel sections.
  • the main optic functionality of the lens elements that is providing the luminous distribution around the optical axis of the associated solid state lighting element towards the area to be illuminated, is not adversely affected, in fact its optic functionality is upheld thus the main illumination functionality of the illumination system is not compromised.
  • the optic features are formed as a cut out element provided in a surface of the intermediate panel section facing away from the support structure. Providing such cut out element is even possible in existing lens panels, allowing the modification of illumination systems already installed in open field lighting applications.
  • the cut out element has an inclined cut out surface, which inclined towards the support structure seen from the surface of the intermediate panel section facing away from the support structure, thus ensuring a limited transmission of visible light emitted by a solid state lighting element in a direction sideways from its optical axis and more in particular ensuring the transmission of light in a direction away from the lens elements thus limiting spill light or spill glare from exiting or escaping the illumination system.
  • the inclined cut out surface is optically structured.
  • the inclined cut out surface exhibits a surface roughness with a Ra ⁇ 0.01pm.
  • the cut out element has an apex angle in the range of 25° to 35°, in particular an apex angle of 30°.
  • a surface of the support structure facing the lens panel has light absorbing properties.
  • the surface of the support structure facing the lens panel is at least locally blackened, in particular at the locations where the lens panel contacts the support structure.
  • a light absorbing component is mounted between the support structure and the lens panel.
  • the illumination system may comprise a plurality of visible light shielding elements mounted on the intermediate panel sections of the lens panel in order to control the overall luminous distribution of the illumination system.
  • the invention also pertains to a lens panel for use in an illumination system according to the disclosure.
  • the illumination system comprises a support structure, a plurality of spatially separated solid state lighting elements mounted on the support structure for emitting visible light, said lens panel disposed on the support structure, wherein the lens panel is made from a visible light transmissive material and composed of a plurality of lens elements covering the plurality of solid state lighting elements and intermediate panel sections interconnecting the plurality of lens elements, wherein each of the plurality of lens elements is arranged to shape a luminous distribution around an optical axis of the associated solid state lighting element.
  • the method according to the disclosure comprises the step of receiving, by said lens panel, a tool for realizing in the lens panel optic features, such that, during operation of the illumination system, to limit the transmission of visible light emitted by a solid state lighting element in a direction sideways from its optical axis towards the lens element covering a neighboring solid state lighting element.
  • the step of realizing the optic features in the lens panel comprises the step of removing, using the tool, material of the lens panel from of a surface of the intermediate panel section facing away from the support structure thus forming a cut out element according to the disclosure.
  • the optic features in the lens panel can be obtained by deformation, for example via a molding step or via a, facultatively local, heating and an embossing step.
  • the method also involves the step of optically structuring the inclined cut out surface of the cut out element.
  • Figs, la and lb a top and side view respectively, of an example of known illumination systems used but not exclusively for illuminating a sports pitch;
  • Figs. 2a and 2b an example of a known illumination system in more detail
  • Figure 3 a side view of a known illumination system with a luminous distribution around an optical axis.
  • FIG. 4 detailed view of an example of an illumination system according to the disclosure
  • FIGs. 5a-5c detailed views of other examples of an illumination system according to the disclosure.
  • Figs. 6a and 6b details of a lens element of a lens panel according to the disclosure
  • Fig. 7 a detail of a further example of a lens panel according to the disclosure.
  • Fig. 8 exemplifying the providing of an optic feature in a lens panel.
  • a major task or challenge of an event lighting system is to illuminate the area in which the event, e.g. a sporting game, is taking place, such, that symmetrical lighting conditions are ensured for optimal sporting conditions.
  • An example of an open field lighting application for example the lighting of large areas such as sports fields, where sport events or other venue events, such as music concerts or festivals are to be held or to be performed is shown in Figures la and lb.
  • Reference numeral 1 depicts an open field, in particular a sports field, more in particular a football or field hockey terrain. At each corner of the field 1 a known illumination system is positioned, in particular mounted on top of a post 100, see Figure lb.
  • the plurality of spatially separated solid state lighting elements act as point sources.
  • a lens panel composed of a plurality of lens elements, each interacting with one of these plurality of solid state lighting element, a luminous distribution around the optical axis of each solid state lighting element is shaped, with the overall luminous distribution generated by the whole illumination system being directed towards the large area.
  • the illumination system 10 in general is composed of a housing (not depicted).
  • the illumination system 10 further comprises a support structure 11 and a plurality of N spatially separated solid state lighting elements 30 mounted on the support structure 11.
  • the plurality of N spatially separated solid state lighting elements 30 are mounted on the support structure 11 in an array of rows and columns. When powered or activated, the plurality of spatially separated solid state lighting elements 30 emit visible light.
  • the support structure 11 may be part of a housing (not depicted) of the illumination system 10.
  • the support structure 11 may contain or comprise electric circuitry and electric components for providing electric power to the several components of the illumination system 10, in particular the spatially separated solid state lighting elements 30, which are mechanically and electrically mounted to the upper surface 1 la of the support structure 11.
  • the support structure 11 can be composed entirely or partly as a printed circuit board (PCB).
  • a lens panel 20 is disposed on the support structure 11.
  • the lens panel 20 has a plate shaped configuration, meaning that its longitudinal dimensions (length and width) are significantly larger than its thickness.
  • the lens panel 20 is made from a visible light transmissive material, such as polycarbonate, PMMA, silicone, glass, etc.
  • the lens panel 20 is composed of a plurality of N lens elements 21 and intermediate panel sections 23, which intermediate panel sections 23 interconnect the plurality of N lens elements 21. Therefor the lens panel 20 forms one single element, allowing an easy and practical mounting and unmounting from the illumination system 10.
  • the plurality of N lens elements 21 are arranged in a similar array configuration as the array of N solid state lighting elements 30. Thus, when mounted to the support structure 11 of the illumination system 10 the plurality of N lens elements 21 of the lens panel 20 each cover one of the plurality of N solid state lighting elements.
  • the number of spatially separated solid state lighting elements 30 / lens elements 21 can be 1 or 2, but preferably at least 2.
  • Suitable examples of an illumination system 10 for example for use in illuminating an open (sports) field may comprise 10 or more, even 20, 30+ per illumination system 10 depending on the size and application of the illumination system.
  • the lens panel 20 has a first panel surface 23a and a second panel surface 23b, each arranged opposite from each other.
  • the second panel surface 23b faces the upper surface 1 la of the support structure 11 and contacts the upper surface I la in the mounting condition of the lens panel 20.
  • each lens element 21 has a thickened material portion compared to the intermediate panel sections 23.
  • each lens element 21 is shaped as a concave lens with its concave light exit surface 21a at the first panel surface 23a and directed towards the exterior of the illumination system 10.
  • the lens panel 20 is provided with cavities.
  • Each cavity 22 has a specifically shaped cavity surface 22b, which forms the light entry surface 22b of the associated lens element 21.
  • the cavity 22 covers or accommodates a solid state lighting element 30 mounted on the support structure 11.
  • each solid state lighting element 30 n , cavity 22 n , and lens element 21 n form an optical system for the transmission of visible light emitted by the respective solid state lighting element 30.
  • each of the plurality of N lens elements 21 n emit primary light 3 l n based on light being emitted by the respective solid state lighting element 30 n . Due to its optical characteristic each lens element 21 n shape the primary light being emitted in a luminous light distribution 3 l n around the optical axis 30a of the associated solid state lighting element 30 n .
  • Said individual luminous light distribution 3 l n of each solid state lighting element 30 n and exiting the concave exit surface 21a of the associated lens element 21 n are part of the full luminous light distribution 31 generated by all solid state lighting elements 30 of the whole illumination system 10 as depicted in Figure la.
  • the illumination system 10 may be provided with shielding elements 40, also known as louvers, disposed on the lens panel 20 between adjacent rows of solid state light emitting elements 30 / lens elements 21.
  • the louvers 40 function as collimators, limiting excessive dispersion or scattering of the primary light exiting the lens element 21 n and directing the individual luminous light distribution 3 l n towards the area to be illuminated.
  • each illumination system 10 positioned at a corner of the field 1 and being directed towards the sports field 1 is denoted with reference numeral 31.
  • the overall combined luminous distributions 31 of the four illumination systems 10 illuminating the field 1 preferably provides a symmetrical lighting coverage, thus ensuring optimal sporting conditions, and optimal circumstances for high quality (digital) video registration by media outlets.
  • the illumination of the field 1 must also not create nuisance glare for the participants on the field 1 (such as players/officials, etc.) and must not generate any spill light or spill glare to the spectators around the field 1 and surrounding environment.
  • each solid state lighting element 30 n acts as a point light source and also emits visible light in a sideway direction away from its optical axis 30a.
  • Such visible secondary light 32 exits the associated cavity 22 n in a sideway direction via the cavity side surface 22a, and propagates through the intermediate panel section 23 1 towards its neighbouring lens element 21°.
  • this sideways emitted secondary light 32 is internally reflected in the lens panel material via the first panel surface 23a and the cavity surface 22b of the neighbouring cavity 22° and exits the neighbouring lens element 21° as spill glare light 32 1 .
  • This spill glare light 32 1 is unwanted as it disturbs the illumination of the area both for the spectators as for video registration by media outlets.
  • the lens panel with optic features, which optical features are configured, during operation of the illumination system, to limit the transmission of visible light emitted by a solid state lighting element in a direction sideways from its optical axis 30a towards the lens element covering a neighboring solid state lighting element.
  • FIG. 4 An example of such illumination system 10’ according to the disclosure provided with a lens panel 20’ according to the disclosure is shown in Figure 4.
  • the optic features provided in the lens panel 20’ according to an example of the disclosure are denoted with reference numeral 25 1 (25 n ) and configured to limit the transmission of visible light emitted by a solid state lighting element 30 n in a direction sideways from its optical axis 30a towards the lens element 21° (21 "" 1 ) covering a neighboring solid state lighting element 30° (30 n-1 ).
  • the optic features 25 1 (25 n ) promote the transmission of the in sideways direction emitted visible secondary light in a direction away from the plurality of lens elements 21 n of the lens panel 20’ according to the disclosure.
  • This secondary light emitted by a solid state lighting element 30 n and being transmitted via the optic features 25 n in a direction away from the plurality of lens elements 21 n is denoted with reference numeral 32 1 (32 n ) and in particular this secondary light 32 n is being directed towards the support structure 11.
  • the optic features 25 n are part of or present in the intermediate panel sections 23 n between two adjacent lens elements 21 n-1 and 21 n of the lens panel 20’. Furthermore, in an advantageous example of both a lens panel 20’ and an illumination system 10’ according to the disclosure, the optic features 25 n are formed as a cut out element provided in the first panel surface 23a of the intermediate panel section 23 n , which first panel surface 23 a faces away from the support structure 11.
  • the cut out element 25 n has an inclined cut out surface 25a, which is inclined towards the support structure 11 seen from the first panel surface 23a of the intermediate panel section 23 n facing away from the support structure 11.
  • the cut out element 25 n has the shape of a cut out prism having a longitudinal direction L more or less equal to the width W of the cavity 22 of the associated lens element 21 n .
  • any spill light 32 emitted in a sideway direction by the solid state lens element 30 accommodated in the cavity 22 will impinge on the inclined cut out surface 25a of the cut out surface 25 and subsequently be transmitted in a direction away from the (neighboring) lens elements 21 of the lens panel 20’, and preferably towards the support structure 11 and does not ‘escape’ from the cavity 22 in an unwanted direction causing unwanted spill light glare 32.
  • the cut out element 25 n has an apex angle a between the inclined cut out surface 25a and the first panel surface 23a, which apex angle a in the range of 25° to 35°, and in particular an apex angle a of 30°.
  • the apex angle a in the ranges as defined above limits the transmission of visible secondary light emitted by a solid state lighting element 30 n in a direction sideways from its optical axis 30a towards the lens element 21""' covering a neighboring solid state lighting element 30"' 1 . Instead it promotes the transmission of the in sideways direction emitted visible secondary light in a direction away from the plurality of lens elements 21 n of the lens panel 20’, as stipulated above.
  • the inclined cut out surface 25a is optically structured.
  • the inclined cut out surface 25a has a surface roughness with Ra ⁇ 0.01pm (arithmetical mean deviation of the assessed profile of the inclined cut out surface 25a).
  • the optically structured inclined cut out surface 25a is obtained by means of a mirror polishing technique.
  • the optic features in the lens panel 20’ according to the disclosure, in particular the cut out element 25 n achieve an optimal total internal reflection (T.I.R.) provided that the cut out element 25 n exhibit the correct dimensions.
  • T.I.R. total internal reflection
  • the apex angle a between the inclined cut out surface 25a and the first panel surface 23a is in the range of 25° to 35°, and in particular a is about or is 30°.
  • the minimum angle 0 which is needed in order to achieve TIR (total internal reflection) of the secondary light 32 n emitted by the solid state lighting element 30 n via the optic features 25 n in a direction away from the plurality of lens elements 21 n and in particular in the direction of the support structure 11 as depicted in Figures 4, 5a-5c and 7.
  • the angle 0 for achieving TIR is different for different materials used as the light transmissive material for the lens panel 20’ and is defined according to the equation:
  • the angle 9TIR for achieving TIR is approx. 39.1°.
  • PMMA polymethyl methacrylate
  • the cut out element 25 n has next to the inclined cut out surface 25a also a base cut out surface 25b.
  • the optic features formed as the cut out element 25 n in the first, upper panel surface 23a of the lens panel 20’ as shown in the examples of Figures 4, 5a-5c, 6a-6b and 7 will, by means of total internal reflection, transmit any secondary light 32 n emitted by the solid state lighting element 30 n and propagating through the intermediate panel section 23 n towards the neighboring lens element 21""' in a direction away from the plurality of lens elements 21 n and in particular towards the support structure 11.
  • the illumination system 10’ will only emit as depicted in Figure 7 a luminous light distribution 3 l n around the optical axis 30a, whereas any adverse spill light glare 32 n , which occurs with an illumination system known in the art ( Figures 1-3), is absent.
  • a surface of the support structure 11 facing the lens panel 20’ has light absorbing properties.
  • An example of this feature is shown in Figure 5b wherein the (upper) surface of the support structure 11 facing the lens panel 20’ is at least locally blackened.
  • This local blackening is depicted by reference numerals I la and is provided on those parts of the upper surface of the support structure 11 directly contacting the lens panel 20’. More in particular the local blackening is present on those parts of the upper surface of the support structure 11 directly contacting the second panel surface 23b of the intermediate panel sections 23 n of the lens panel 20’.
  • the blackening 1 la is provided on the overall upper surface of the support structure 11, also locally of the solid state lighting elements 30 n and the cavities 22 n .
  • a separate light absorbing component 12 is mounted between the support structure 11 and the lens panel 20’.
  • the component 12 should be made from a light absorbing material, and preferably have dielectric characteristics.
  • the thickness of the component 12 it is noted that may not obstruct the light emission functionality of the solid state lighting elements 30.
  • the thickness of the component 12 should be smaller than height of the solid state lighting elements 30 mounted on the support structure 11, measured from bottom part of solid state lighting elements 30 to its optical center.
  • the disclosure also relates to a method for realizing optic features 25 in a lens panel 20 used in an illumination system 10.
  • the method according to the disclosure allow modifying lens panels 20 already mounted in existing illumination systems 10 as for example disclosed in Figures 1-3.
  • the lens panel 20 on which the method for realizing optic features in is performed is made from a visible light transmissive material and composed of a plurality of lens elements 21, which when mounted in an illumination system 10 cover the plurality of solid state lighting elements 30. Also such lens panel 20 comprises intermediate panel sections 23 interconnecting the plurality of lens elements 21.
  • the method according to the disclosure comprises the step of receiving, by said lens panel 20, a tool 50 for realizing in the lens panel 20 the optic features 25 as described in this disclosure, that is realizing optic features 25 having the optic functionality as to limiting the transmission of visible light emitted by a solid state lighting element 30 n in a direction sideways from its optical axis 30a towards the lens element covering a neighboring solid state lighting element 30"' 1 .
  • the method as disclosed in Figure 8 comprises the step of removing, using the tool 50, material (indicated with reference numeral 250) of the lens panel 20 from the first panel surface 23 a of the intermediate panel section 23 facing away from the support structure 11.
  • material indicated with reference numeral 250
  • this could be attained via a molding or an embossing step.
  • the tool 50 is provided with a tool tip 50a configured to form the cut out element 25 as described in this disclosure, for example the prism-shaped cut out element 25.
  • the method implements the further step of optically structuring the inclined cut out surface 25a of the cut out element 25.
  • the step of optically structuring comprises the step of mirror polishing.
  • the step of optically structuring results in the inclined cut out surface 25a having a surface roughness with Ra ⁇ 0.01 pm (arithmetical mean deviation of the assessed profile of the inclined cut out surface 25a).

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

Abstract

L'invention concerne un système d'éclairage ou un luminaire convenant, mais non exclusivement, à des applications d'éclairage en champ ouvert, comme des terrains de sport, le système d'éclairage comprenant plusieurs éléments d'éclairage à semi-conducteurs spatialement séparés, chaque élément d'éclairage à semi-conducteurs étant associé à un élément de lentille conçu pour former une distribution lumineuse autour d'un axe optique de l'élément d'éclairage à semi-conducteurs. L'invention concerne également un panneau de lentille au moins composé de plusieurs desdits éléments de lentille. En outre, l'invention porte sur un procédé de réalisation de caractéristiques optiques dans un tel panneau de lentille. Le panneau de lentille est pourvu de caractéristiques optiques configurées, pendant le fonctionnement du système d'éclairage, pour limiter la transmission de la lumière visible émise par un élément d'éclairage à semi-conducteurs dans une direction latérale depuis son axe optique vers l'élément de lentille recouvrant un élément d'éclairage à semi-conducteurs voisin. Ainsi, une lumière parasite ou un éblouissement parasite créés dans le panneau de lentille et qui sortent normalement du système d'éclairage et provoquent les effets secondaires indésirables gênants exposés ci-dessus, sont significativement réduits.
PCT/EP2021/075481 2020-09-21 2021-09-16 Système d'éclairage, panneau de lentille pour un tel système d'éclairage et procédé de réalisation d'un tel panneau de lentille WO2022058425A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1988752A1 (fr) * 2006-02-23 2008-11-05 Matsushita Electric Works, Ltd. Dispositif d'eclairage a led
WO2011045663A1 (fr) * 2009-10-16 2011-04-21 Solari Di Udine Spa Dispositif lumineux de signalisation du type à dels et méthode de commande associée
JP2016024954A (ja) * 2014-07-18 2016-02-08 岩崎電気株式会社 照明装置
KR20160111133A (ko) * 2015-03-16 2016-09-26 엘지전자 주식회사 조명 장치
US20170030548A1 (en) * 2015-07-28 2017-02-02 Panasonic Intellectual Property Management Co., Ltd. Optical lens, lens array, and lighting apparatus
EP3211297A1 (fr) * 2016-02-24 2017-08-30 Siteco Beleuchtungstechnik GmbH Module d'éclairage en particulier pour l'eclairage routier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1988752A1 (fr) * 2006-02-23 2008-11-05 Matsushita Electric Works, Ltd. Dispositif d'eclairage a led
WO2011045663A1 (fr) * 2009-10-16 2011-04-21 Solari Di Udine Spa Dispositif lumineux de signalisation du type à dels et méthode de commande associée
JP2016024954A (ja) * 2014-07-18 2016-02-08 岩崎電気株式会社 照明装置
KR20160111133A (ko) * 2015-03-16 2016-09-26 엘지전자 주식회사 조명 장치
US20170030548A1 (en) * 2015-07-28 2017-02-02 Panasonic Intellectual Property Management Co., Ltd. Optical lens, lens array, and lighting apparatus
EP3211297A1 (fr) * 2016-02-24 2017-08-30 Siteco Beleuchtungstechnik GmbH Module d'éclairage en particulier pour l'eclairage routier

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