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EP1260757A1 - Lighting device producing asymmetrical light beam and equipped with non-reflective cover - Google Patents

Lighting device producing asymmetrical light beam and equipped with non-reflective cover Download PDF

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Publication number
EP1260757A1
EP1260757A1 EP02077014A EP02077014A EP1260757A1 EP 1260757 A1 EP1260757 A1 EP 1260757A1 EP 02077014 A EP02077014 A EP 02077014A EP 02077014 A EP02077014 A EP 02077014A EP 1260757 A1 EP1260757 A1 EP 1260757A1
Authority
EP
European Patent Office
Prior art keywords
luminaire
reflector
light
protective glass
lighting
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.)
Withdrawn
Application number
EP02077014A
Other languages
German (de)
French (fr)
Inventor
Priscille Societe Civile S.P.I.D. Ernotte
Remi Societe Civile S.P.I.D. Noirot
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1260757A1 publication Critical patent/EP1260757A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • 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
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21W2131/101—Outdoor lighting of tunnels or the like, e.g. under bridges
    • 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
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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

Definitions

  • the present invention relates to a beam luminaire asymmetrical lighting.
  • the present invention relates more particularly to a globally oriented asymmetrical light beam luminaire towards the surface to be lit in a lighting direction main, comprising a reflector, generally in profile parabolic and asymmetrical, which defines an opening, a light source arranged substantially at the focal point of the parabola, and a substantially flat protective glass which closes the reflector.
  • Such a type of luminaire is described for example in the document WO-A-98/17944.
  • This type of luminaire is used in particular to achieve exterior lights such as road lights, road tunnels, and sports fields.
  • FIG. 1 shows the light rays emitted by the source 12 which are reflected on the internal face 16 of the protective glass 14 in a luminaire 10 depending on the state of the technical.
  • the light rays which reflect a second time on the front portion of the reflector 18 finally pass through the protective glass 14, but a part of these light rays then has a global direction of lighting inclined towards the rear of the luminaire 10 relative to the vertical.
  • This “parasitic” light beam does not shine in the main direction for which the luminaire 10 is provided.
  • This phenomenon is penalizing because it causes a loss light intensity in the main lighting direction.
  • this parasitic phenomenon is a source of "pollution luminous "near the sports field, since the luminaire illuminates areas that did not require lighting, for example example of dwellings, for which the luminous flux can be a nuisance.
  • This parasitic phenomenon is also very annoying in a application such as so-called “back flow” lighting in a road tunnel.
  • Back flow lighting in a road tunnel 20, which is shown diagrammatically in FIG. 2, consists in arranging the luminaires 10 so as to send a maximum amount of light on the pavement 22 in the direction of motorist 24.
  • the luminance of the roadway 22 seen by the motorist 24 is high.
  • any obstacle 26 located on the pavement 22 will appear dark on a light background, provided that the face noticeably vertical 28 of the obstacle 26 seen by the motorist 24 receives a small amount of light.
  • the invention aims to remedy these drawbacks by decreasing the quantity of light rays which are reflected on protective glass inside the luminaire.
  • the invention proposes a luminaire of the type described above, characterized in that at least one face of the protective glass has an anti-reflective coating.
  • the light distribution of the lighting produced by the luminaire according to the invention is better since the rays luminous are generally all emitted towards the front of the luminaire, following the main direction of lighting.
  • the luminaire according to the invention has a photometric efficiency higher than known luminaires.
  • the invention therefore makes it possible to design more luminaires compact, with at least as good lighting efficiency.
  • the two sides of the protective glass have an anti-reflective coating.
  • FIG. 3 there is shown a luminaire 10 with beam asymmetrical lighting carried out in accordance with the teachings of the invention.
  • This figure represents more particularly the section main of the optical system 11 of such a luminaire 10.
  • the optical system 11, which is mounted here in a support 13, includes a reflector 18, a light source 12, shown schematically by a cross, and a protective glass 14.
  • the reflector 18 has an asymmetrical profile which consists overall of several portions of parabola and which delimits a cavity 30 open downwards.
  • the opening 32 of the reflector 18 is contained here in a substantially horizontal plane.
  • the rear portion 34 forms a hollow 38 towards the rear at inside the reflector 18.
  • the internal wall 40 of the reflector 18, in the cavity 30, is covered with a reflective coating of known type.
  • the light source 12 is arranged inside the reflector 18, generally at the focal point of a portion of a parabola, in the hollow 38 formed by the rear portion 34 of the reflector 18, in the vicinity of the internal wall 40 of the reflector 18.
  • the opening 32 of the reflector 18 is closed by a glass substantially flat protective cover 14, contained here in a plane horizontal.
  • At least one of the faces of the protective glass 14 includes a anti-reflective coating 42, 44, or anti-reflection treatment.
  • the two faces of the protective glass 14 are provided with an anti-reflective coating 42, 44.
  • this coating 42, 44 decreases so sensitive the number of light rays which are reflected on the internal surface 16 of the protective glass 14 by facilitating the scattering through the glass 14 of the light rays emitted by the source 12. Consequently, the number of rays is reduced bright which are likely to be reflected on the front portion 36 of the reflector 18 and leave the optical system 11 according to a “parasitic” direction generally oriented towards the rear.
  • the luminaire 10 according to the invention makes it possible to increase about 10% of the amount of light used to illuminate the sports ground, while significantly reducing discomfort light caused around the sports field.
  • the luminaire 10 according to the invention increases simultaneously the average luminance of the pavement inside of the tunnel, the contrast perceived by the motorist inside the tunnel is greatly improved.
  • the luminous efficiency of the luminaire 10 is improved up to 10%.
  • the improvement in the light output of the luminaire 10 also makes it possible to reduce the internal heating of the luminaire 10 due to light rays reflecting inside of reflector 18.
  • the improvement in light output still allows reduce the number of luminaires 10 required. We decrease therefore the cost of a lighting installation, for example a sports ground, and we reduce maintenance costs for luminaires 10 of the lighting installation.

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

Abstract

The light fitting (10) has a parabolic reflector (18) which is aligned asymmetrically with the protective glass (14) to give a beam directed in the forward sense and suitable for illuminating sports grounds or motorway tunnels. Anti-reflective coatings (42,44) are applied to both sides of the protective glass to reduce the amount of light projected backwards by double reflection

Description

La présente invention concerne un luminaire à faisceau d'éclairage asymétrique.The present invention relates to a beam luminaire asymmetrical lighting.

La présente invention concerne plus particulièrement un luminaire à faisceau d'éclairage asymétrique, orienté globalement vers la surface à éclairer suivant une direction d'éclairage principale, comportant un réflecteur, de profil globalement parabolique et asymétrique, qui délimite une ouverture, une source lumineuse agencée sensiblement au foyer de la parabole, et une glace de protection sensiblement plane qui ferme le réflecteur.The present invention relates more particularly to a globally oriented asymmetrical light beam luminaire towards the surface to be lit in a lighting direction main, comprising a reflector, generally in profile parabolic and asymmetrical, which defines an opening, a light source arranged substantially at the focal point of the parabola, and a substantially flat protective glass which closes the reflector.

Un tel type de luminaire est décrit par exemple dans le document WO-A-98/17944.Such a type of luminaire is described for example in the document WO-A-98/17944.

Ce type de luminaire est utilisé en particulier pour réaliser des éclairages extérieurs tels que des éclairages de routes, de tunnels routiers, et de terrains de sport.This type of luminaire is used in particular to achieve exterior lights such as road lights, road tunnels, and sports fields.

Dans de telles applications, on cherche à diriger le faisceau lumineux principalement vers le sol et vers l'avant du luminaire.In such applications, one seeks to direct the light beam mainly towards the ground and towards the front of the lamp.

Cependant, dans les luminaires de l'art antérieur, un flux lumineux « parasite » est émis vers l'arrière du luminaire, en raison de la réflexion d'une partie non négligeable des rayons lumineux émis par la source sur la face interne de la glace de protection.However, in the luminaires of the prior art, a flux “parasitic” light is emitted towards the rear of the luminaire, reason for the reflection of a non-negligible part of the rays light emitted by the source on the internal face of the glass protection.

En effet, suivant les propriétés de réfraction des rayons lumineux sur une glace plane, en fonction notamment de l'angle d'incidence de ces rayons lumineux sur la glace, une fraction des rayons lumineux, qui s'est déjà réfléchit une fois sur la face interne du réflecteur, se réfléchit sur la face interne de la glace, puis se réfléchit à nouveau sur la face interne du réflecteur.Indeed, depending on the refraction properties of the rays bright on flat glass, depending in particular on the angle incidence of these light rays on the ice, a fraction of light rays, which is already reflected once on the face internal of the reflector, is reflected on the internal face of the glass, then is reflected again on the internal face of the reflector.

On a représenté sur la figure 1 les rayons lumineux émis par la source 12 qui se réfléchissent sur la face interne 16 de la glace de protection 14 dans un luminaire 10 selon l'état de la technique.FIG. 1 shows the light rays emitted by the source 12 which are reflected on the internal face 16 of the protective glass 14 in a luminaire 10 depending on the state of the technical.

Comme on le voit sur la figure 1, les rayons lumineux qui se réfléchissent une deuxième fois sur la portion avant du réflecteur 18 traversent enfin la glace de protection 14, mais une partie de ces rayons lumineux a alors une direction globale d'éclairage inclinée vers l'arrière du luminaire 10 par rapport à la verticale.As seen in Figure 1, the light rays which reflect a second time on the front portion of the reflector 18 finally pass through the protective glass 14, but a part of these light rays then has a global direction of lighting inclined towards the rear of the luminaire 10 relative to the vertical.

En considérant la figure 1, en prenant comme référence un axe vertical et un sens de rotation positif suivant le sens anti-horaire, on peut estimer que les rayons lumineux qui décrivent un angle aigu négatif sont des rayons « parasites », car ils forment un faisceau lumineux orienté globalement vers l'arrière du luminaire 10.Considering Figure 1, taking as reference a vertical axis and a positive direction of rotation in a counterclockwise direction, we can estimate that the light rays which describe a acute negative angle are "stray" rays because they form a light beam oriented generally towards the rear of the light 10.

Ce faisceau lumineux « parasite » n'éclaire pas dans la direction principale pour laquelle est prévu le luminaire 10.This “parasitic” light beam does not shine in the main direction for which the luminaire 10 is provided.

Ce phénomène est pénalisant car il provoque une perte d'intensité lumineuse dans la direction d'éclairage principale.This phenomenon is penalizing because it causes a loss light intensity in the main lighting direction.

Dans une application'telle que l'éclairage d'un terrain de sport, ce phénomène parasite est source de « pollution lumineuse » aux abords du terrain de sport, puisque le luminaire éclaire des zones qui ne demandaient pas d'éclairage, par exemple des habitations, pour lesquelles le flux lumineux peut constituer une gêne.In an application such as lighting a sport, this parasitic phenomenon is a source of "pollution luminous "near the sports field, since the luminaire illuminates areas that did not require lighting, for example example of dwellings, for which the luminous flux can be a nuisance.

Ce phénomène parasite est aussi très gênant dans une application telle qu'un éclairage dit « à contre flux » dans un tunnel routier.This parasitic phenomenon is also very annoying in a application such as so-called “back flow” lighting in a road tunnel.

L'éclairage à contre flux dans un tunnel routier 20, qui est schématisé sur la figure 2, consiste à agencer les luminaires 10 de manière à envoyer une quantité maximale de lumière sur la chaussée 22 dans la direction de l'automobiliste 24.Back flow lighting in a road tunnel 20, which is shown diagrammatically in FIG. 2, consists in arranging the luminaires 10 so as to send a maximum amount of light on the pavement 22 in the direction of motorist 24.

Compte tenu des propriétés en réflexion de la chaussée 22, la luminance de la chaussée 22 vue par l'automobiliste 24 est élevée. Ainsi, tout obstacle 26 situé sur la chaussée 22 apparaítra sombre sur un fond clair, à condition que la face sensiblement verticale 28 de l'obstacle 26 vue par l'automobiliste 24 reçoive une quantité de lumière faible.Given the reflective properties of the pavement 22, the luminance of the roadway 22 seen by the motorist 24 is high. Thus, any obstacle 26 located on the pavement 22 will appear dark on a light background, provided that the face noticeably vertical 28 of the obstacle 26 seen by the motorist 24 receives a small amount of light.

Les rayons lumineux parasites émis par les luminaires selon l'état de la technique atténuent donc le contraste perçu par l'automobiliste 24 puisqu'ils éclairent la face verticale 28 de l'obstacle 26 située du côté de l'automobiliste 24.Stray light rays emitted by luminaires according to the state of the art therefore attenuate the contrast perceived by the motorist 24 since they illuminate the vertical face 28 of the obstacle 26 located on the side of the motorist 24.

Pour éviter que les rayons lumineux qui se réfléchissent sur la face interne de la glace de protection puis sur la portion avant du réflecteur ne sortent du système optique, formé par le réflecteur et la glace, suivant une direction globalement orientée vers l'arrière, on peut « tendre » davantage la portion avant du réflecteur, c'est-à-dire aplanir et allonger la portion avant, de sorte que l'angle de réflexion des rayons lumineux qui se réfléchissent sur cette portion du réflecteur soit plus ouvert et que ces rayons lumineux se réfléchissent plutôt vers l'avant du luminaire.To prevent the reflected light rays on the inside of the protective glass and then on the portion front of the reflector does not leave the optical system, formed by the reflector and glass, in a generally oriented direction backwards, you can further “stretch” the front portion of the reflector, that is to say to flatten and lengthen the front portion, so that the angle of reflection of the light rays which reflect on this portion of the reflector is more open and that these light rays are rather reflected towards the front of the lamp.

Cette solution est représentée en traits pointillés sur la figure 1.This solution is represented by dotted lines on the figure 1.

Cette solution n'est pas satisfaisante car elle provoque une augmentation des dimensions, et donc du poids, du luminaire, ainsi qu'une augmentation de sa résistance au vent.This solution is not satisfactory because it causes a increase in dimensions, and therefore in weight, of the luminaire, as well as an increase in wind resistance.

L'invention vise à remédier à ces inconvénients en diminuant la quantité de rayons lumineux qui se réfléchissent sur la glace de protection, à l'intérieur du luminaire.The invention aims to remedy these drawbacks by decreasing the quantity of light rays which are reflected on protective glass inside the luminaire.

Dans ce but, l'invention propose un luminaire du type décrit précédemment, caractérisé en ce qu'au moins une face de la glace de protection comporte un revêtement anti-réfléchissant.To this end, the invention proposes a luminaire of the type described above, characterized in that at least one face of the protective glass has an anti-reflective coating.

La distribution lumineuse de l'éclairage produit par le luminaire selon l'invention est meilleure puisque les rayons lumineux sont globalement tous émis vers l'avant du luminaire, suivant la direction principale d'éclairage.The light distribution of the lighting produced by the luminaire according to the invention is better since the rays luminous are generally all emitted towards the front of the luminaire, following the main direction of lighting.

De plus, le luminaire selon l'invention possède un rendement photométrique supérieur aux luminaires connus. L'invention permet donc de concevoir des luminaires plus compacts, dont l'efficacité d'éclairage est au moins aussi bonne.In addition, the luminaire according to the invention has a photometric efficiency higher than known luminaires. The invention therefore makes it possible to design more luminaires compact, with at least as good lighting efficiency.

Selon une autre caractéristique de l'invention, les deux faces de la glace de protection comportent un revêtement anti-réfléchissant.According to another characteristic of the invention, the two sides of the protective glass have an anti-reflective coating.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en section qui représente un luminaire selon l'état de la technique ;
  • la figure 2 est un schéma qui illustre le principe de l'éclairage à contre flux dans un tunnel routier ;
  • la figure 3 est une vue en section qui représente schématiquement un luminaire réalisé conformément aux enseignements de l'invention.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • Figure 1 is a schematic sectional view which shows a luminaire according to the prior art;
  • Figure 2 is a diagram illustrating the principle of back flow lighting in a road tunnel;
  • Figure 3 is a sectional view which schematically shows a light produced in accordance with the teachings of the invention.

Sur la figure 3 on a représenté un luminaire 10 à faisceau d'éclairage asymétrique réalisé conformément aux enseignements de l'invention.In Figure 3 there is shown a luminaire 10 with beam asymmetrical lighting carried out in accordance with the teachings of the invention.

Cette figure représente plus particulièrement la section principale du système optique 11 d'un tel luminaire 10.This figure represents more particularly the section main of the optical system 11 of such a luminaire 10.

Dans la suite de la description on utilisera arbitrairement une orientation d'arrière en avant, qui correspond à une orientation de gauche à droite en considérant la figure 3, et une orientation de haut en bas qui correspond à l'orientation de la figure 3.In the following description, we will use arbitrarily an orientation from back to front, which corresponds to a orientation from left to right considering figure 3, and a orientation from top to bottom which corresponds to the orientation of the figure 3.

Le système optique 11, qui est monté ici dans un support 13, comporte un réflecteur 18, une source lumineuse 12, schématisée par une croix, et une glace de protection 14.The optical system 11, which is mounted here in a support 13, includes a reflector 18, a light source 12, shown schematically by a cross, and a protective glass 14.

Le réflecteur 18 a un profil asymétrique qui est constitué globalement de plusieurs portions de parabole et qui délimite une cavité 30 ouverte vers le bas.The reflector 18 has an asymmetrical profile which consists overall of several portions of parabola and which delimits a cavity 30 open downwards.

L'ouverture 32 du réflecteur 18 est contenue ici dans un plan sensiblement horizontal. The opening 32 of the reflector 18 is contained here in a substantially horizontal plane.

En se déplaçant de gauche à droite sur le profil du réflecteur 18 on constate qu'il comporte une portion arrière 34 fortement incurvée et une portion avant 36 faiblement incurvée.Moving from left to right on the profile of the reflector 18 we see that it has a rear portion 34 strongly curved and a slightly curved front portion 36.

La portion arrière 34 forme un creux 38 vers l'arrière à l'intérieur du réflecteur 18.The rear portion 34 forms a hollow 38 towards the rear at inside the reflector 18.

La paroi interne 40 du réflecteur 18, dans la cavité 30, est recouverte d'un revêtement réfléchissant de type connu.The internal wall 40 of the reflector 18, in the cavity 30, is covered with a reflective coating of known type.

La source lumineuse 12 est agencée à l'intérieur du réflecteur 18, globalement au foyer d'une portion de parabole, dans le creux 38 formé par la portion arrière 34 du réflecteur 18, au voisinage de la paroi interne 40 du réflecteur 18.The light source 12 is arranged inside the reflector 18, generally at the focal point of a portion of a parabola, in the hollow 38 formed by the rear portion 34 of the reflector 18, in the vicinity of the internal wall 40 of the reflector 18.

L'ouverture 32 du réflecteur 18 est fermée par une glace de protection 14 sensiblement plane, contenue ici dans un plan horizontal.The opening 32 of the reflector 18 is closed by a glass substantially flat protective cover 14, contained here in a plane horizontal.

Conformément aux enseignements de l'invention, au moins une des faces de la glace de protection 14 comporte un revêtement anti-réfléchissant 42, 44, ou traitement anti-reflet.In accordance with the teachings of the invention, at least one of the faces of the protective glass 14 includes a anti-reflective coating 42, 44, or anti-reflection treatment.

Avantageusement, les deux faces de la glace de protection 14 sont munies d'un revêtement anti-réfléchissant 42, 44.Advantageously, the two faces of the protective glass 14 are provided with an anti-reflective coating 42, 44.

Selon un mode de réalisation de l'invention, on utilise le: revêtement anti-réfléchissant « Amiran », de la société « Schott », et on l'applique sur les deux faces de la glace de protection 14.According to one embodiment of the invention, the: anti-reflective coating "Amiran", from the company "Schott", and it is applied to both sides of the protective glass 14.

Grâce à ce revêtement 42, 44, on diminue de manière sensible le nombre de rayons lumineux qui se réfléchissent sur la surface interne 16 de la glace de protection 14 en facilitant la diffusion à travers la glace 14 des rayons lumineux émis par la source 12. Par conséquent, on diminue le nombre de rayons lumineux qui sont susceptibles de se réfléchir sur la portion avant 36 du réflecteur 18 et de sortir du système optique 11 selon une direction « parasite » orientée globalement vers l'arrière.With this coating 42, 44, it decreases so sensitive the number of light rays which are reflected on the internal surface 16 of the protective glass 14 by facilitating the scattering through the glass 14 of the light rays emitted by the source 12. Consequently, the number of rays is reduced bright which are likely to be reflected on the front portion 36 of the reflector 18 and leave the optical system 11 according to a “parasitic” direction generally oriented towards the rear.

En réalisant des mesures avec un luminaire 10 d'éclairage extérieur pour terrain de sport réalisé conformément aux enseignements de l'invention, on constate une diminution de l'intensité lumineuse émise à l'arrière du luminaire 10 d'environ 10%, pour des rayons lumineux décrivant des angles de 0 à -20 degrés par rapport à la verticale, et d'environ 50%, pour des rayons lumineux décrivant des angles de -45 à -75 degrés par rapport la verticale.By carrying out measurements with a lighting fixture 10 exterior for sports ground produced in accordance with lessons of the invention, there is a decrease in the light intensity emitted at the rear of the luminaire 10 of approximately 10%, for light rays describing angles from 0 to -20 degrees from the vertical, and about 50%, for light rays describing angles from -45 to -75 degrees by report the vertical.

Le luminaire 10 selon l'invention permet d'augmenter d'environ 10% la quantité de lumière utilisée pour éclairer le terrain de sport, tout en réduisant considérablement la gêne lumineuse occasionnée aux abords du terrain de sport.The luminaire 10 according to the invention makes it possible to increase about 10% of the amount of light used to illuminate the sports ground, while significantly reducing discomfort light caused around the sports field.

En réalisant des mesures avec un luminaire 10 réalisé conformément aux enseignements de l'invention pour l'éclairage à contre flux d'un tunnel routier, on constate une diminution d'environ 50% de l'intensité lumineuse maximale émise sur une surface verticale orientée vers un automobiliste.By making measurements with a luminaire 10 made in accordance with the teachings of the invention for lighting at against flow from a road tunnel, there is a decrease about 50% of the maximum light intensity emitted on a vertical surface oriented towards a motorist.

Comme le luminaire 10 selon l'invention augmente simultanément la luminance moyenne de la chaussée à l'intérieur du tunnel, le contraste perçu par l'automobiliste à l'intérieur du tunnel est considérablement amélioré.As the luminaire 10 according to the invention increases simultaneously the average luminance of the pavement inside of the tunnel, the contrast perceived by the motorist inside the tunnel is greatly improved.

Selon le mode de réalisation de l'invention dans lequel on applique le revêtement anti-réflexion « Amiran » sur la glace de protection, on améliore le rendement lumineux du luminaire 10 jusqu'à 10%.According to the embodiment of the invention in which apply the "Amiran" anti-reflection coating on the glass protection, the luminous efficiency of the luminaire 10 is improved up to 10%.

On note que l'amélioration du rendement lumineux du luminaire 10 permet aussi de diminuer l'échauffement interne du luminaire 10 dû aux rayons lumineux se réfléchissant à l'intérieur du réflecteur 18.It should be noted that the improvement in the light output of the luminaire 10 also makes it possible to reduce the internal heating of the luminaire 10 due to light rays reflecting inside of reflector 18.

L'amélioration du rendement lumineux permet encore de diminuer le nombre de luminaires 10 nécessaires. On diminue donc le coût d'une installation d'éclairage, par exemple d'un terrain de sport, et on réduit les frais de maintenance des luminaires 10 de l'installation d'éclairage.The improvement in light output still allows reduce the number of luminaires 10 required. We decrease therefore the cost of a lighting installation, for example a sports ground, and we reduce maintenance costs for luminaires 10 of the lighting installation.

Claims (2)

Luminaire (10) à faisceau d'éclairage asymétrique, orienté globalement vers la surface à éclairer et vers l'avant du luminaire (10) suivant une direction d'éclairage principale, comportant un réflecteur (18), de profil globalement parabolique et asymétrique, qui délimite une ouverture (32), une source lumineuse (12) agencée sensiblement au foyer de la parabole, et une glace de protection (14) sensiblement plane qui ferme le réflecteur (18), caractérisé en ce qu'au moins une face de la glace de protection (14) comporte un revêtement anti-réfléchissant (42, 44).Luminaire (10) with asymmetrical lighting beam, oriented generally towards the surface to be lit and towards the front of the luminaire (10) in a main lighting direction, comprising a reflector (18), of generally parabolic and asymmetrical profile, which delimits an opening (32), a light source (12) arranged substantially at the focal point of the parabola, and a substantially planar protective glass (14) which closes the reflector (18), characterized in that at least one face of the protective glass (14) has an anti-reflective coating (42, 44). Luminaire (10) selon la revendication précédente, caractérisé en ce que les deux faces de la glace de protection (14) comportent un revêtement anti-réfléchissant (42, 44).Luminaire (10) according to the preceding claim, characterized in that the two faces of the protective glass (14) have an anti-reflective coating (42, 44).
EP02077014A 2001-05-22 2002-05-22 Lighting device producing asymmetrical light beam and equipped with non-reflective cover Withdrawn EP1260757A1 (en)

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FR0106749 2001-05-22

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Publication number Priority date Publication date Assignee Title
EP2112428A1 (en) * 2008-04-21 2009-10-28 Christian Bartenbach Tunnel light and tunnel lighting system with a number of such tunnel lights
ITVI20080217A1 (en) * 2008-09-16 2010-03-17 Beghelli Spa RECESSED INTERIOR LIGHTING APPLIANCE
DE10301257B4 (en) * 2002-12-20 2012-12-13 Siteco Beleuchtungstechnik Gmbh Luminaire with a cover with reduced reflection
CN113883437A (en) * 2020-07-04 2022-01-04 上海隧道工程质量检测有限公司 Anti-glare method for tunnel illumination

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US4027151A (en) * 1975-11-18 1977-05-31 Crouse-Hinds Company Luminaire and reflector therefor
US4081667A (en) * 1976-07-28 1978-03-28 Optical Coating Laboratory, Inc. Lighting fixture having fresnel reflector with high reflection coating thereon
US4173778A (en) * 1976-07-28 1979-11-06 Optical Coating Laboratory, Inc. Lighting fixtures and glass enclosure having high angle anti-reflection coating
US4310876A (en) * 1978-06-30 1982-01-12 Small Jr Edward A Lighting fixture and method using multiple reflections
WO1998017944A1 (en) 1996-10-18 1998-04-30 Walter Wadey & Co. Pty. Ltd. Flood light or luminaire construction

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US4027151A (en) * 1975-11-18 1977-05-31 Crouse-Hinds Company Luminaire and reflector therefor
US4081667A (en) * 1976-07-28 1978-03-28 Optical Coating Laboratory, Inc. Lighting fixture having fresnel reflector with high reflection coating thereon
US4173778A (en) * 1976-07-28 1979-11-06 Optical Coating Laboratory, Inc. Lighting fixtures and glass enclosure having high angle anti-reflection coating
US4310876A (en) * 1978-06-30 1982-01-12 Small Jr Edward A Lighting fixture and method using multiple reflections
WO1998017944A1 (en) 1996-10-18 1998-04-30 Walter Wadey & Co. Pty. Ltd. Flood light or luminaire construction

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301257B4 (en) * 2002-12-20 2012-12-13 Siteco Beleuchtungstechnik Gmbh Luminaire with a cover with reduced reflection
EP2112428A1 (en) * 2008-04-21 2009-10-28 Christian Bartenbach Tunnel light and tunnel lighting system with a number of such tunnel lights
ITVI20080217A1 (en) * 2008-09-16 2010-03-17 Beghelli Spa RECESSED INTERIOR LIGHTING APPLIANCE
EP2163810A3 (en) * 2008-09-16 2010-11-03 Beghelli S.p.A. Built-in home lighting equipment
CN101749613B (en) * 2008-09-16 2014-04-09 贝格利股份公司 Built-in home lighting equipment
CN113883437A (en) * 2020-07-04 2022-01-04 上海隧道工程质量检测有限公司 Anti-glare method for tunnel illumination
CN113883437B (en) * 2020-07-04 2023-09-29 上海隧道工程质量检测有限公司 Tunnel illumination anti-dazzle method

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