EP0648972A1 - Luminaire comprising orientable optical elements - Google Patents

Luminaire comprising orientable optical elements Download PDF

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Publication number
EP0648972A1
EP0648972A1 EP94202883A EP94202883A EP0648972A1 EP 0648972 A1 EP0648972 A1 EP 0648972A1 EP 94202883 A EP94202883 A EP 94202883A EP 94202883 A EP94202883 A EP 94202883A EP 0648972 A1 EP0648972 A1 EP 0648972A1
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EP
European Patent Office
Prior art keywords
axis
profile
rotation
parallel
longitudinal direction
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.)
Granted
Application number
EP94202883A
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German (de)
French (fr)
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EP0648972B1 (en
Inventor
Peter Société Civile S.P.I.D. Holten
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Compagnie Philips Eclairage
Koninklijke Philips NV
Original Assignee
Compagnie Philips Eclairage
Koninklijke Philips Electronics NV
Philips Electronics NV
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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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment

Definitions

  • the present invention relates to a luminaire for a linear type lamp mounted in a fixed position, comprising at least one screen profile placed in the luminous flux of the lamp and movable around an axis of rotation parallel to its longitudinal direction.
  • a luminaire can be used for lighting a work surface or horizontally or vertically oriented objects, in particular the lighting of automobile assembly lines which combines an asymmetrical beam with an anti-light suppression angle. glare, shop lighting, sports hall lighting, vertical lighting of bulletin boards or school boards, etc.
  • a luminaire according to the preamble above is known from patent GB-A-653,486 (R & A.G. CROSSLAND LTD).
  • This document describes a luminaire for a linear type lamp associated with two profiles which constitute screens parallel to the longitudinal direction. It is indicated that these screens, the position of which is adjustable, may be opaque, or translucent, or reflective. It is clear that according to which of these three cases is considered, the technical effect is different. However, since the profiles, once defined (that is to say opaque, or translucent, or reflectors), can no longer be modified, this limits the possibilities of adjusting the illumination.
  • the object of the invention is therefore to generate multi-zone lighting adjustable in a wide range of angles, with independent glare control, adjustable also in a wide range of angles.
  • the luminaire is provided with at least two profiles, one of which is a main reflector and the other is the aforesaid screen profile, which is of a type deflecting light laterally, and has a dimension and a position such that it intercepts part of the luminous flux returned by the main reflector.
  • the main reflector has a focal axis on which the lamp is substantially placed. So you get concentrated lighting.
  • the axis of rotation of the screen profile is advantageously placed substantially on the focal axis. Thus it remains at constant distance from the lamp when it is moved.
  • the screen profile is transparent and consists of an assembly of elementary prisms each of which is parallel to the longitudinal direction of the profile.
  • the screen profile is an opaque wall made up of elementary prisms side by side, each of which is parallel to the longitudinal direction of the profile, and the surface of which receives light is treated as a mirror.
  • the screen profile consists of a louvre with lamellae parallel to the longitudinal direction of the main reflector, lamellae which are inclined relative to a plane passing through the axis of rotation of the louvre.
  • the surface of the louvre slats which receive the light is treated in a mirror.
  • the section of the screen profile is an arc of a circle, the center of which is situated substantially on its axis of rotation.
  • the elements of the screen profile are all permanently at the same distance from the lamp, and produce a regular effect.
  • the main reflector is also advantageously mobile, around an axis parallel to its own longitudinal direction.
  • the rotation of the main reflector allows even more flexibility in adjusting the direction and distribution of the lighting.
  • the luminaire further comprising a housing, it is advantageously provided with a closure profile parallel to the longitudinal direction of the main reflector, in order to close any vacuum between this reflector and the housing, and with means of rotation of this closure profile around an axis coinciding with the axis of rotation of the screen profile, said closure profile having a cross section in an arc of a circle, the center of which is located on the axis of rotation.
  • This closing profile can be placed in the path of the light beam leaving the main reflector, in addition to the screen profile, in order to avoid certain types of glare and it can also be used to mask a void between the reflector and a box containing the latter.
  • Figure 1 shows in cross section an alternative embodiment of a luminaire according to the invention.
  • Figure 2 shows in cross section another alternative embodiment of a luminaire according to the invention.
  • the device shown in FIG. 1 is designed for a lamp of the linear type, for example one of those known under the references TL, PL, Halogen, SON-T. It comprises a housing 13 which contains and protects the optical assembly. It is provided with a lamp 2 of circular section mounted in a fixed position in a reflective profile 1 whose surface of the concave face is a mirror producing concentrated lighting, that is to say whose angular width is 2 ⁇ 20 ° or 40 °, which is narrow in the usual sense of 150 mm wide optics for TL or PL lamps, and is ideal for most asymmetrical applications. This results in uniform illumination in planes at a short distance from the luminaire.
  • this reflective profile 1 has a parabolic section with a focal distance of approximately 0.8 D, "D" being the diameter of the section of the lamp 2.
  • the axis of the lamp, including the supports are attached to the reflector, coincides with the focal line of the reflector.
  • the latter has a recessed part 4 above the lamp, which is concave or flat, which aims to recover more light above the lamp.
  • This reflector is for example made of extruded metal. Means, not shown but that the skilled person can easily realize, allow its rotation about an axis parallel to its own longitudinal direction (perpendicular to the plane of the figure).
  • the opening of the housing is wider than that of the reflector, so that no part of the housing obscures the light exiting the reflector in the different possible positions of the latter.
  • the reflector is turned as far as possible clockwise and there is therefore a void 12 on the right between the edge of the reflector 1 and the edge of the housing 13; in figure 2 it is the opposite: the vacuum is on the left.
  • a closure profile 11 is provided, parallel to the longitudinal direction of the reflector profile. Means for rotating this closure profile around the axis 7 coinciding with the center of the lamp, and are constituted for example by arms 10 placed at each end of the closure profile and whose axis of rotation is fixed to the reflector.
  • this closure profile 11 can have two uses: it can be placed in the path of the light beam leaving the reflector (although this practice loses light) to avoid glare in a specific place, and it can also be placed as shown in the figures, to mask the void between the housing and the reflector.
  • this closure profile can be an integral part of the reflector profile 1, as indicated by the references 14 in FIG. 2; in this case, its function is only to mask the void between the housing and the reflector.
  • the luminaire is here provided with a screen profile 3 consisting of a plurality of prisms made of a transparent material, each of which is parallel to the longitudinal direction of the reflector.
  • An articulation allows the rotation of this set of prisms around the axis 7, constituted for example by arms 5 placed at each end of the prismatic section 3, and whose axis of rotation is fixed to the reflector.
  • the prisms are supported, in the plane of the figure, on a virtual line which is an arc of a circle and the center of this arc of a circle coincides with the axis of rotation 7.
  • the orientation of the beam is influenced and, once the luminaire is installed, it is easy to change the setting if the conditions change.
  • the prisms on the upper surface (in the figure) of the screen 3 are for example aluminized or silvered so as to make the surface reflective like a mirror. So the redirection effect of the light is obtained by a second reflection on the reflector 1.
  • the upper surface (in the figure) of the screen 3 could be smooth and treated in matt black. Then there would be no light redirection effect but only an anti-glare effect. In addition, light would be lost.
  • Transversal lamellae 15 can be provided to avoid glare in planes of vision parallel to the axis of the lamp.
  • the luminaire shown in FIG. 2 comprises, like that described above, a housing 13, a reflector 1, and a lamp 2. It is provided with a screen profile consisting of a louvre 8 with strips 9 which are preferably inclined in a direction parallel to the plane of symmetry of the reflector 1, and the surface of the louvre slats which receive the light (on the left in the figure) is mirrored.
  • An articulation allows the rotation of this set of strips around the axis 7, constituted for example by arms 6 placed at each end of the louvre 8, and whose axis of rotation is fixed to the reflector.
  • the louvre could also be fixed to transverse strips 15.
  • the slats are supported, in the plane of the figure, on a virtual line which is an arc of a circle and the center of this arc of a circle coincides with the axis of rotation 7.
  • the surface of the set of prisms 3 or of the louvre 8 is such that, considered in the transverse direction with respect to the reflector, it only intercepts a part of the light flux produced by the luminaire. In other words, the angle at which we see these elements from the lamp is smaller than the angle at which we see the reflector outlet.
  • the rotation of the screen profile or of the closure profile could also be obtained from curvilinear slides in which the ends of the profiles would slide.

Abstract

This luminair (light fitting) intended for a lamp (2) of linear type mounted fixed in a main reflector section (1) is provided with a screen section (3) made, for example, by assembling prisms, each one of which is parallel to the longitudinal direction of the section, with means (5) allowing this screen to be rotated about an axis (7) parallel to the longitudinal direction of the section. The reflector (1) can also turn about a longitudinal axis. Applications: illumination of a work surface or of horizontally or vertically oriented objects. <IMAGE>

Description

La présente invention concerne un luminaire pour une lampe de type linéaire montée en position fixe, comprenant au moins un profilé écran placé dans le flux lumineux de la lampe et mobile autour d'un axe de rotation parallèle à sa direction longitudinale.
Un tel luminaire peut servir à l'éclairage d'un plan de travail ou d'objets orientés horizontalement ou verticalement, notamment l'éclairage de lignes d'assemblage d'automobiles qui combine un faisceau asymétrique avec un angle de suppression de lumière anti-éblouissement, l'éclairage de boutiques, l'éclairage de halls de sport, l'éclairage vertical de tableaux d'affichage ou scolaires, etc.The present invention relates to a luminaire for a linear type lamp mounted in a fixed position, comprising at least one screen profile placed in the luminous flux of the lamp and movable around an axis of rotation parallel to its longitudinal direction.
Such a luminaire can be used for lighting a work surface or horizontally or vertically oriented objects, in particular the lighting of automobile assembly lines which combines an asymmetrical beam with an anti-light suppression angle. glare, shop lighting, sports hall lighting, vertical lighting of bulletin boards or school boards, etc.

Un luminaire selon le préambule ci-dessus est connu du brevet GB-A-653 486 (R & A.G. CROSSLAND LTD). Ce document décrit un luminaire pour une lampe de type linéaire associée à deux profilés qui constituent des écrans parallèles à la direction longitudinale. Il est indiqué que ces écrans, dont la position est ajustable, peuvent être opaques, ou translucides, ou réflecteurs. Il est clair que selon celui de ces trois cas qui est considéré, l'effet technique est différent. Toutefois comme les profilés, une fois définis (c'est-à-dire opaques, ou translucides, ou réflecteurs), ne peuvent plus être modifiés, cela limite les possibilités de réglage de l'éclairement.A luminaire according to the preamble above is known from patent GB-A-653,486 (R & A.G. CROSSLAND LTD). This document describes a luminaire for a linear type lamp associated with two profiles which constitute screens parallel to the longitudinal direction. It is indicated that these screens, the position of which is adjustable, may be opaque, or translucent, or reflective. It is clear that according to which of these three cases is considered, the technical effect is different. However, since the profiles, once defined (that is to say opaque, or translucent, or reflectors), can no longer be modified, this limits the possibilities of adjusting the illumination.

On a souhaité, dans le cas de la présente invention, obtenir une optique permettant d'obtenir un faisceau principal bien concentré, tout en pouvant faire diverger une partie de la lumière pour des applications spécifiques. La largeur du faisceau principal doit être relativement étroite afin d'obtenir un niveau d'éclairement élevé et une bonne uniformité d'éclairement. En outre un effet anti-éblouissement serait apprécié en supplément.
Le but de l'invention est donc de générer un éclairage multi-zones réglable dans une large gamme d'angles, avec un contrôle indépendant de l'éblouissement, réglable aussi dans une large gamme d'angles. Ceci est obtenu du fait qe le luminaire est muni d'au moins deux profilés dont l'un est un réflecteur principal et l'autre est le susdit profilé écran, lequel est d'un type déviant latéralement la lumière, et a une dimension et une position telle qu'il intercepte une partie du flux lumineux renvoyé par le réflecteur principal.
De préférence, le réflecteur principal possède un axe focal sur lequel est sensiblement placée la lampe. Ainsi on obtient un éclairage concentré.
L'axe de rotation du profilé écran est avantageusement placé sensiblement sur l'axe focal. Ainsi il reste à distance constante de la lampe lorsqu'on le déplace.
Selon un mode de réalisation, le profilé écran est transparent et est constitué d'un assemblage de prismes élémentaires dont chacun est parallèle à la direction longitudinale du profilé.
Selon un autre mode de réalisation, le profilé écran est une paroi opaque constituée de prismes élémentaires côte à côte dont chacun est parallèle à la direction longitudinale du profilé, et dont la surface qui reçoit la lumière est traitée en miroir
Selon encore un autre mode de réalisation, le profilé écran est constitué d'un louvre avec des lamelles parallèles à la direction longitudinale du réflecteur principal, lamelles qui sont inclinées par rapport à un plan passant par l'axe de rotation du louvre. Avantageusement, la surface des lamelles du louvre qui reçoit la lumière est traitée en miroir.
De préférence, la section du profilé écran est un arc de cercle dont le centre est situé sensiblement sur son axe de rotation.
Ainsi les éléments du profilé écran sont tous en permanence à la même distance de la lampe, et produisent un effet régulier.
Le réflecteur principal est avantageusement mobile aussi, autour d'un axe parallèle à sa propre direction longitudinale.
La rotation du réflecteur principal permet encore plus de souplesse dans le réglage de la direction et de la répartition de l'éclairage.
Le luminaire comportant en outre un boîtier, il est muni avantageusement d'un profilé de fermeture parallèle à la direction longitudinale du réflecteur principal, pour fermer un vide éventuel entre ce réflecteur et le boîtier, et de moyens de rotation de ce profilé de fermeture autour d'un axe coïncidant avec l'axe de rotation du profilé écran, le dit profilé de fermeture ayant une section transversale en arc de cercle, dont le centre est situé sur l'axe de rotation.
Ce profilé de fermeture peut être placé dans le trajet du faisceau lumineux sortant du réflecteur principal, en plus du profilé écran, afin d'éviter certains types d'éblouissement et il peut aussi être utilisé pour masquer un vide entre le réflecteur et un boîtier contenant ce dernier.It has been desired, in the case of the present invention, to obtain an optic making it possible to obtain a well concentrated main beam, while being able to cause part of the light to diverge for specific applications. The width of the main beam must be relatively narrow in order to obtain a high level of illumination and good uniformity of illumination. In addition, an anti-glare effect would be appreciated in addition.
The object of the invention is therefore to generate multi-zone lighting adjustable in a wide range of angles, with independent glare control, adjustable also in a wide range of angles. This is obtained due to the fact that the luminaire is provided with at least two profiles, one of which is a main reflector and the other is the aforesaid screen profile, which is of a type deflecting light laterally, and has a dimension and a position such that it intercepts part of the luminous flux returned by the main reflector.
Preferably, the main reflector has a focal axis on which the lamp is substantially placed. So you get concentrated lighting.
The axis of rotation of the screen profile is advantageously placed substantially on the focal axis. Thus it remains at constant distance from the lamp when it is moved.
According to one embodiment, the screen profile is transparent and consists of an assembly of elementary prisms each of which is parallel to the longitudinal direction of the profile.
According to another embodiment, the screen profile is an opaque wall made up of elementary prisms side by side, each of which is parallel to the longitudinal direction of the profile, and the surface of which receives light is treated as a mirror.
According to yet another embodiment, the screen profile consists of a louvre with lamellae parallel to the longitudinal direction of the main reflector, lamellae which are inclined relative to a plane passing through the axis of rotation of the louvre. Advantageously, the surface of the louvre slats which receive the light is treated in a mirror.
Preferably, the section of the screen profile is an arc of a circle, the center of which is situated substantially on its axis of rotation.
The elements of the screen profile are all permanently at the same distance from the lamp, and produce a regular effect.
The main reflector is also advantageously mobile, around an axis parallel to its own longitudinal direction.
The rotation of the main reflector allows even more flexibility in adjusting the direction and distribution of the lighting.
The luminaire further comprising a housing, it is advantageously provided with a closure profile parallel to the longitudinal direction of the main reflector, in order to close any vacuum between this reflector and the housing, and with means of rotation of this closure profile around an axis coinciding with the axis of rotation of the screen profile, said closure profile having a cross section in an arc of a circle, the center of which is located on the axis of rotation.
This closing profile can be placed in the path of the light beam leaving the main reflector, in addition to the screen profile, in order to avoid certain types of glare and it can also be used to mask a void between the reflector and a box containing the latter.

Ces aspects de l'invention ainsi que d'autres aspects plus détaillés apparaîtront plus clairement grâce à la description suivante d'un mode de réalisation non limitatif.
La figure 1 représente en coupe transversale une variante de réalisation d'un luminaire selon l'invention.
La figure 2 représente en coupe transversale une autre variante de réalisation d'un luminaire selon l'invention.These aspects of the invention as well as other more detailed aspects will become more clearly apparent from the following description of a nonlimiting embodiment.
Figure 1 shows in cross section an alternative embodiment of a luminaire according to the invention.
Figure 2 shows in cross section another alternative embodiment of a luminaire according to the invention.

Le dispositif représenté sur la figure 1 est conçu pour une lampe de type linéaire, par exemple une de celles connues sous les références TL, PL, Halogène, SON-T. Il comporte un boîtier 13 qui contient et protège l'ensemble optique.
Il est muni d'une lampe 2 de section circulaire montée en position fixe dans un profilé réflecteur 1 dont la surface de la face concave est un miroir produisant un éclairage concentré, c'est-à-dire dont la largeur angulaire est de l'ordre de 2×20° ou 40°, ce qui est étroit au sens habituel des optiques de 150 mm de large pour lampes TL ou PL, et s'avère idéal pour la plupart des applications assymétriques. Il en résulte un éclairement uniforme dans des plans à courte distance du luminaire. Pour produire un tel éclairage, ce profilé réflecteur 1 a une section parabolique avec une distance focale d'environ 0,8 D, "D" étant le diamètre de la section de la lampe 2. L'axe de la lampe, dont les supports sont fixés au réflecteur, coïncide avec la ligne focale du réflecteur. Ce dernier comporte une partie 4 en retrait au dessus de la lampe, qui est concave ou plane, qui a pour but de récupérer plus de lumière au dessus de la lampe. Ce réflecteur est par exemple réalisé en métal extrudé.
Des moyens, non représentés mais que l'homme du métier peut facilement réaliser, permettent sa rotation autour d'un axe parallèle à sa propre direction longitudinale (perpendiculaire au plan de la figure). Du fait que le réflecteur est mobile l'ouverture du boîtier est prévue plus large que celle du réflecteur, de façon qu'aucune partie du boîtier n'occulte la lumière sortant du réflecteur dans les différentes positions possibles de ce dernier. Sur la figure 1 le réflecteur est tourné au maximum dans le sens des aiguilles d'une montre et de ce fait un vide 12 se trouve à droite entre le bord du réflecteur 1 et le bord du boîtier 13 ; dans la figure 2 c'est l'inverse : le vide est à gauche. Un profilé de fermeture 11 est prévu, parallèle à la direction longitudinale du profilé réflecteur. Des moyens de rotation de ce profilé de fermeture autour de l'axe 7 coïncidant avec le centre de la lampe, et sont constitués par exemple par des bras 10 placés à chaque extrémité du profilé de fermeture et dont l'axe de rotation est fixé au réflecteur. De préférence, la section transversale de ce profilé de fermeture est un arc de cercle, dont le centre coïncide avec l'axe 7. Ce profilé de fermeture 11 peut avoir deux usages : il peut être placé dans le trajet du faisceau lumineux sortant du réflecteur (bien que cette pratique perde de la lumière) afin d'éviter l'éblouissement en un lieu précis, et il peut aussi être placé comme le montrent les figures, pour masquer le vide entre le boîtier et le réflecteur. Dans une variante simplifiée, ce profilé de fermeture peut être partie intégrante du profilé réflecteur 1, comme indiqué par les références 14 sur la figure 2 ; dans ce cas, sa fonction est seulement de masquer le vide entre le boitier et le réflecteur. Bien que les éléments 10,11 d'une part et les éléments 14 d'autre part soient représentés sur la même figure pour éviter une figure supplémentaire, il est clair qu'ils ne sont pas présents ensemble dans un même luminaire.
Le luminaire est ici muni d'un profilé écran 3 constitué d'une pluralité de prismes faits d'une matière transparente, dont chacun est parallèle à la direction longitudinale du réflecteur. Une articulation permet la rotation de cet ensemble de prismes autour de l'axe 7, constituée par exemple par des bras 5 placés à chaque extrémité du profilé prismatique 3, et dont l'axe de rotation est fixé au réflecteur.
Les prismes sont appuyés, dans le plan de la figure, sur une ligne virtuelle qui est un arc de cercle et le centre de cet arc de cercle coïncide avec l'axe de rotation 7.
En faisant tourner l'assemblage de prismes 3 autour de l'axe 7, on influence l'orientation du faisceau et, une fois le luminaire installé, il est facile de changer le réglage si les conditions changent. Dans une variante, les prismes à la surface supérieure (sur la figure) de l'écran 3 sont par exemple aluminisés ou argentés de façon à rendre la surface réflectrice comme un miroir. Alors l'effet de redirection de la lumière est obtenu par une seconde réflexion sur le réflecteur 1. Dans une autre variante très simplifiée, la surface supérieure (sur la figure) de l'écran 3 pourrait être lisse et traitée en noir mat. Alors il n'y aurait pas d'effet de redirection de la lumière mais seulement un effet anti-éblouissement. En outre de la lumière serait perdue.
Des lamelles transversales 15 peuvent être prévues pour éviter l' éblouissement dans des plans de vision parallèles à l'axe de la lampe. Le luminaire représenté sur la figure 2 comporte comme celui décrit ci-dessus un boîtier 13, un réflecteur 1, et une lampe 2. Il est muni d'un profilé écran constitué d'un louvre 8 avec des lamelles 9 qui sont inclinées de préférence dans une direction parallèle au plan de symétrie du réflecteur 1, et la surface des lamelles du louvre qui reçoit la lumière (à gauche sur la figure) est traitée en miroir. Une articulation permet la rotation de cet ensemble de lamelles autour de l'axe 7, constituée par exemple par des bras 6 placés à chaque extrémité du louvre 8, et dont l'axe de rotation est fixé au réflecteur. Dans une variante simplifiée le louvre pourrait aussi être fixé à des lamelles transversales 15.
Les lamelles sont appuyées, dans le plan de la figure, sur une ligne virtuelle qui est un arc de cercle et le centre de cet arc de cercle coïncide avec l'axe de rotation 7.
La surface de l'ensemble de prismes 3 ou du louvre 8 est telle que, considérée dans le sens transversal par rapport au réflecteur, elle n'intercepte qu'une partie seulement du flux lumineux produit par le luminaire. Autrement dit l'angle sous lequel on voit ces éléments depuis la lampe est plus petit que l'angle sous lequel on voit l'orifice de sortie du réflecteur.
En variante, la rotation du profilé écran ou du profilé de fermeture pourraient aussi être obtenue à partir de glissières curvilignes dans lesquelles les extrémités des profilés glisseraient.The device shown in FIG. 1 is designed for a lamp of the linear type, for example one of those known under the references TL, PL, Halogen, SON-T. It comprises a housing 13 which contains and protects the optical assembly.
It is provided with a lamp 2 of circular section mounted in a fixed position in a reflective profile 1 whose surface of the concave face is a mirror producing concentrated lighting, that is to say whose angular width is 2 × 20 ° or 40 °, which is narrow in the usual sense of 150 mm wide optics for TL or PL lamps, and is ideal for most asymmetrical applications. This results in uniform illumination in planes at a short distance from the luminaire. To produce such lighting, this reflective profile 1 has a parabolic section with a focal distance of approximately 0.8 D, "D" being the diameter of the section of the lamp 2. The axis of the lamp, including the supports are attached to the reflector, coincides with the focal line of the reflector. The latter has a recessed part 4 above the lamp, which is concave or flat, which aims to recover more light above the lamp. This reflector is for example made of extruded metal.
Means, not shown but that the skilled person can easily realize, allow its rotation about an axis parallel to its own longitudinal direction (perpendicular to the plane of the figure). Because the reflector is mobile, the opening of the housing is wider than that of the reflector, so that no part of the housing obscures the light exiting the reflector in the different possible positions of the latter. In FIG. 1, the reflector is turned as far as possible clockwise and there is therefore a void 12 on the right between the edge of the reflector 1 and the edge of the housing 13; in figure 2 it is the opposite: the vacuum is on the left. A closure profile 11 is provided, parallel to the longitudinal direction of the reflector profile. Means for rotating this closure profile around the axis 7 coinciding with the center of the lamp, and are constituted for example by arms 10 placed at each end of the closure profile and whose axis of rotation is fixed to the reflector. Preferably, the cross section of this closure profile is an arc of a circle, the center of which coincides with the axis 7. This closure profile 11 can have two uses: it can be placed in the path of the light beam leaving the reflector (although this practice loses light) to avoid glare in a specific place, and it can also be placed as shown in the figures, to mask the void between the housing and the reflector. In a simplified variant, this closure profile can be an integral part of the reflector profile 1, as indicated by the references 14 in FIG. 2; in this case, its function is only to mask the void between the housing and the reflector. Although the elements 10, 11 on the one hand and the elements 14 on the other hand are shown in the same figure to avoid an additional figure, it is clear that they are not present together in the same luminaire.
The luminaire is here provided with a screen profile 3 consisting of a plurality of prisms made of a transparent material, each of which is parallel to the longitudinal direction of the reflector. An articulation allows the rotation of this set of prisms around the axis 7, constituted for example by arms 5 placed at each end of the prismatic section 3, and whose axis of rotation is fixed to the reflector.
The prisms are supported, in the plane of the figure, on a virtual line which is an arc of a circle and the center of this arc of a circle coincides with the axis of rotation 7.
By rotating the assembly of prisms 3 around the axis 7, the orientation of the beam is influenced and, once the luminaire is installed, it is easy to change the setting if the conditions change. In a variant, the prisms on the upper surface (in the figure) of the screen 3 are for example aluminized or silvered so as to make the surface reflective like a mirror. So the redirection effect of the light is obtained by a second reflection on the reflector 1. In another very simplified variant, the upper surface (in the figure) of the screen 3 could be smooth and treated in matt black. Then there would be no light redirection effect but only an anti-glare effect. In addition, light would be lost.
Transversal lamellae 15 can be provided to avoid glare in planes of vision parallel to the axis of the lamp. The luminaire shown in FIG. 2 comprises, like that described above, a housing 13, a reflector 1, and a lamp 2. It is provided with a screen profile consisting of a louvre 8 with strips 9 which are preferably inclined in a direction parallel to the plane of symmetry of the reflector 1, and the surface of the louvre slats which receive the light (on the left in the figure) is mirrored. An articulation allows the rotation of this set of strips around the axis 7, constituted for example by arms 6 placed at each end of the louvre 8, and whose axis of rotation is fixed to the reflector. In a simplified variant, the louvre could also be fixed to transverse strips 15.
The slats are supported, in the plane of the figure, on a virtual line which is an arc of a circle and the center of this arc of a circle coincides with the axis of rotation 7.
The surface of the set of prisms 3 or of the louvre 8 is such that, considered in the transverse direction with respect to the reflector, it only intercepts a part of the light flux produced by the luminaire. In other words, the angle at which we see these elements from the lamp is smaller than the angle at which we see the reflector outlet.
As a variant, the rotation of the screen profile or of the closure profile could also be obtained from curvilinear slides in which the ends of the profiles would slide.

Claims (10)

Luminaire pour une lampe (2) de type linéaire montée en position fixe, comprenant au moins un profilé écran (3, 8) placé dans le flux lumineux de la lampe et mobile autour d'un axe de rotation parallèle à sa direction longitudinale, caractérisé en ce qu'il est muni d'au moins deux profilés dont l'un est un réflecteur principal (1) et l'autre est le susdit profilé écran, lequel est d'un type déviant latéralement la lumière, et a une dimension et une position telle qu'il intercepte une partie du flux lumineux renvoyé par le réflecteur principal.Luminaire for a lamp (2) of linear type mounted in a fixed position, comprising at least one screen profile (3, 8) placed in the luminous flux of the lamp and movable about an axis of rotation parallel to its longitudinal direction, characterized in that it is provided with at least two profiles, one of which is a main reflector (1) and the other is the aforesaid screen profile, which is of a type deflecting light laterally, and has a dimension and a position such that it intercepts part of the light flux returned by the main reflector. Luminaire selon la revendication 1, caractérisé en ce que le réflecteur principal possède un axe focal (7) sur lequel est sensiblement placée la lampe (2).Luminaire according to claim 1, characterized in that the main reflector has a focal axis (7) on which the lamp (2) is substantially placed. Luminaire selon la revendications précédente, caractérisé en ce que l'axe de rotation du profilé écran (3, 8) est sensiblement placé sur l'axe focal (7).Luminaire according to the preceding claims, characterized in that the axis of rotation of the screen profile (3, 8) is substantially placed on the focal axis (7). Luminaire selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le profilé écran (3) est transparent et est constitué d'un assemblage de prismes élémentaires dont chacun est parallèle à la direction longitudinale du profilé.Luminaire according to any one of claims 1 to 3, characterized in that the screen profile (3) is transparent and consists of an assembly of elementary prisms each of which is parallel to the longitudinal direction of the profile. Luminaire selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le profilé écran (3) est une paroi constituée de prismes élémentaires côte à côte dont chacun est parallèle à la direction longitudinale du profilé, dont la surface qui reçoit la lumière est traitée en miroir.Luminaire according to any one of Claims 1 to 3, characterized in that the screen profile (3) is a wall made up of elementary prisms side by side, each of which is parallel to the longitudinal direction of the profile, the surface of which receives light is mirrored. Luminaire selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le profilé écran (8) est constitué d'un louvre avec des lamelles (9) parallèles à la direction longitudinale du réflecteur principal, lamelles qui sont inclinées par rapport à un plan passant par l'axe de rotation du louvre.Luminaire according to any one of claims 1 to 3, characterized in that the screen profile (8) consists of a louvre with slats (9) parallel to the longitudinal direction of the main reflector, slats which are inclined relative to a plane passing through the axis of rotation of the louvre. Luminaire selon la revendication précédente, caractérisé en ce que la surface des lamelles (9) du louvre qui reçoit la lumière est traitée en miroir.Luminaire according to the preceding claim, characterized in that the surface of the slats (9) of the louvre which receives the light is treated as a mirror. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que la section du profilé écran (3, 8) est un arc de cercle dont le centre est situé sensiblement sur son axe de rotation.Luminaire according to any one of the preceding claims, characterized in that the section of the screen profile (3, 8) is an arc of a circle, the center of which is situated substantially on its axis of rotation. Luminaire selon l'une quelconque des revendications précédentes, caractérisé en ce que le réflecteur principal (1) est mobile aussi, autour d'un axe parallèle à sa propre direction longitudinale.Luminaire according to any one of the preceding claims, characterized in that the main reflector (1) is also movable, around an axis parallel to its own longitudinal direction. Luminaire selon la revendication précédente, comportant un boîtier (13), caractérisé en ce qu'il est muni en outre d'un profilé de fermeture (11) parallèle à la direction longitudinale du réflecteur principal (1), pour fermer un vide éventuel (12) entre le réflecteur principal et le boîtier, et de moyens de rotation (10) de ce profilé de fermeture autour d'un axe coïncidant avec l'axe (7) de rotation du profilé écran, le dit profilé de fermeture ayant une section transversale en arc de cercle, dont le centre est situé sur l'axe de rotation.Luminaire according to the preceding claim, comprising a housing (13), characterized in that it is further provided with a closure profile (11) parallel to the longitudinal direction of the main reflector (1), to close any vacuum ( 12) between the main reflector and the housing, and means of rotation (10) of this closure profile around an axis coinciding with the axis (7) of rotation of the screen profile, said closure profile having a section transverse in an arc, the center of which is located on the axis of rotation.
EP94202883A 1993-10-13 1994-10-05 Luminaire comprising orientable optical elements Expired - Lifetime EP0648972B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312188A FR2711220A1 (en) 1993-10-13 1993-10-13 Luminaire with adjustable optics.
FR9312188 1993-10-13

Publications (2)

Publication Number Publication Date
EP0648972A1 true EP0648972A1 (en) 1995-04-19
EP0648972B1 EP0648972B1 (en) 1999-01-07

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EP94202883A Expired - Lifetime EP0648972B1 (en) 1993-10-13 1994-10-05 Luminaire comprising orientable optical elements

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EP (1) EP0648972B1 (en)
AT (1) ATE175485T1 (en)
DE (1) DE69415761T2 (en)
DK (1) DK0648972T3 (en)
ES (1) ES2129103T3 (en)
FR (1) FR2711220A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324854A (en) * 1997-05-02 1998-11-04 John Mfg Ltd Lantern
EP1724515A2 (en) * 2005-05-16 2006-11-22 iGUZZINI ILLUMINAZIONE S.p.A. Lighting device with an asymmetrical light distribution
US10054288B2 (en) 2015-12-04 2018-08-21 Dyson Technology Limited Lighting device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006758A1 (en) * 2005-02-15 2006-08-24 Norbert Wagner Lighting device with a light source and a lamp housing
CN107940338B (en) * 2017-11-09 2020-01-31 安徽世林照明股份有限公司 surrounding ceiling lamp capable of adjusting light and light adjusting method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB653486A (en) * 1948-10-14 1951-05-16 R & A G Crossland Ltd Improvements relating to screens or reflectors for tubular electric lamps
CH473354A (en) * 1968-11-12 1969-05-31 Sulzer Ernst Anti-glare housing for lighting
DE9004579U1 (en) * 1990-04-23 1990-06-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
DE4225386A1 (en) * 1992-07-31 1992-12-03 Siemens Ag Fluorescent lamp lighting unit - has apertured light stop projecting inwards from one side of light exit opening

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB653486A (en) * 1948-10-14 1951-05-16 R & A G Crossland Ltd Improvements relating to screens or reflectors for tubular electric lamps
CH473354A (en) * 1968-11-12 1969-05-31 Sulzer Ernst Anti-glare housing for lighting
DE9004579U1 (en) * 1990-04-23 1990-06-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
DE4225386A1 (en) * 1992-07-31 1992-12-03 Siemens Ag Fluorescent lamp lighting unit - has apertured light stop projecting inwards from one side of light exit opening

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324854A (en) * 1997-05-02 1998-11-04 John Mfg Ltd Lantern
EP1724515A2 (en) * 2005-05-16 2006-11-22 iGUZZINI ILLUMINAZIONE S.p.A. Lighting device with an asymmetrical light distribution
EP1724515A3 (en) * 2005-05-16 2008-01-23 iGUZZINI ILLUMINAZIONE S.p.A. Lighting device with an asymmetrical light distribution
US10054288B2 (en) 2015-12-04 2018-08-21 Dyson Technology Limited Lighting device

Also Published As

Publication number Publication date
ES2129103T3 (en) 1999-06-01
DE69415761T2 (en) 1999-07-01
FR2711220A1 (en) 1995-04-21
ATE175485T1 (en) 1999-01-15
DE69415761D1 (en) 1999-02-18
DK0648972T3 (en) 1999-07-19
EP0648972B1 (en) 1999-01-07

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