EP0122972A1 - Non-dazzling light fixture with an elongated light source - Google Patents

Non-dazzling light fixture with an elongated light source Download PDF

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Publication number
EP0122972A1
EP0122972A1 EP83112800A EP83112800A EP0122972A1 EP 0122972 A1 EP0122972 A1 EP 0122972A1 EP 83112800 A EP83112800 A EP 83112800A EP 83112800 A EP83112800 A EP 83112800A EP 0122972 A1 EP0122972 A1 EP 0122972A1
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EP
European Patent Office
Prior art keywords
light source
angle
longitudinal plane
light
lamellae
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EP83112800A
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German (de)
French (fr)
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EP0122972B1 (en
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Christian Bartenbach
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Individual
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Individual
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Priority to AU25445/84A priority Critical patent/AU561926B2/en
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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
    • 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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the present invention relates to a luminaire with a rod-shaped light source and to both longitudinal sides of the light source up to this extending such concave reflectors that all rays emitted transversely to the light source directly or after reflection under a steeper than one.
  • luminaire-specific blanking angle emerge in the transverse direction and with transverse to the vertical central longitudinal plane of the light source, cross-sectionally approximately V-shaped lamellae with reflective, concave curved side surfaces that all rays emitted in the longitudinal direction of the light source directly or after reflection under a steeper than a luminaire-specific blanking angle ß emerge in the longitudinal direction and the top of the slats is closed by a flat reflective cover.
  • the surface of the lamellae running transversely to the light source is therefore designed to be reflective in order to also reflect the light rays hitting the lamellae from above and finally to let them emerge from the luminaire. Otherwise, the efficiency of the luminaire would be not insignificantly reduced, since the lamellae must be arranged at relatively small distances from one another, the intended purpose of masking out emerging rays should be achieved.
  • a major disadvantage of the known design is that the rays reflected from the top of the lamellae emerge for a considerable part flatter than specified, thus creating a mirror image of the light source for the viewer, which ultimately leads to glare. This reflection is particularly annoying when working on display devices. To avoid this, it has already been proposed to blacken the top of the slats or to make them open at the top; in both cases, however, the aforementioned loss of efficiency occurs, which can be up to 20%.
  • a lamp with an elongated lamp is known, with the covers of the slats for directing light into the space above the lamp in accordance with the vertical lamp plane to avoid strong brightening in the region of the reflector plate sections above the slats exhibit.
  • These inclined sections can be concavely curved, for example. Due to this configuration, part of the rays reflected by the light source may be reflected in the space above the light source by the inclined covers, but precisely in the critical areas where the lamellae are pass into the reflectors, there are still reflections that lead to the undesirable brightening.
  • the invention is based on the object, starting from a lamp of the type described above, to improve it in such a way that the entire coverage area of the slats reflects the incident light rays in such a way that complete freedom from glare is achieved.
  • the lamellae are shaped such that two lamella sections are formed which are arranged symmetrically with respect to the central longitudinal plane, the flat top sides of which, starting from below the light source, at an inclination angle corresponding approximately to the fade-out angle obliquely to the longitudinal plane with an opposite slope under a tangential, however non-contact approach to the light source to the reflectors.
  • the cover of the lamella is accordingly not curved, rather the cover of the lamella is flat, and the lamella itself has a slope inclined to the longitudinal plane of the light source, namely from below the light source to above the light source.
  • Lights of the known type see Fig. 1, have a rod-shaped light source (fluorescent tube) 1, around which a reflector 2 is arranged. Its contour is determined such that each light beam reflected by it leaves the lamp steeper than that beam 3 which touches the light source at its lower edge and the lower edge of the reflector 2. The angle field is therefore the cross-fade-out angle.
  • slats 4 are provided transversely to the longitudinal axis of the light source 1, the height and mutual distance of which are such are selected so that all rays are reflected by the concave side surfaces 5, which leave the light source flatter than that beam 6, which affects the upper or lower edge of the opposite side surfaces 5 of two adjacent slats 4.
  • This beam 6 forms an angle ⁇ with the horizontal.
  • the angle ⁇ is the blanking angle in the longitudinal direction and is generally of the same order of magnitude as the angle ⁇ in the transverse direction.
  • a lamp according to the invention is shown, wherein the glare described above is avoided.
  • the slats 4 have a course of their top 8 in such a way that two slat sections are formed which are symmetrical to the central vertical longitudinal plane of the Light source 1 are arranged, the upper sides 8, starting from below the light source 1, at an inclination angle corresponding to the blanking angle ci to the horizontal, obliquely to the longitudinal plane with an opposite slope. This results in a tangential, but non-contact approach of the flat upper sides 8 to the light source 1.
  • the two lamella sections end in the side reflectors 2.
  • the two inclined slat sections are connected by a slat section 10 running perpendicular to the central longitudinal plane of the light source 1, so that a horizontal slat course results below the light source 1.
  • a slat course corresponding to the surface of the light source would be ideal here.
  • the horizontal lamella section is preferable.
  • the lower longitudinal edge of the slats 4 runs parallel to the top 8 of the slats. As a result, the width of the slat according to the invention does not differ from that of the embodiment known in FIGS. 1 and 2, and light losses that would occur with a wider slat shape are avoided.
  • the beam 7a in Fig. 3 which leaves the light source 1 at the same point and at the same angle as the beam 7 in Fig. 1, the beam 7a is deflected upward more than the beam 7 and leaves the inventive Luminaire after reflection on reflector 2 very steep, so that glare-free radiation from light source 1 takes place.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Inorganic Insulating Materials (AREA)
  • Glass Compositions (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Light fixtures with a rod-shaped light source (1) and with concave reflectors on both longitudinal sides of the light source. The concave reflectors extend above the light source, and have a curvature such that all light rays reflected across the light source will emerge in the transverse direction either directly or after reflection at an angle that is steeper than a light-specific masking angle ( alpha ). The reflectors include lamellae (4) that have an approximately V-shaped cross section and run across the middle vertical longitudinal plane of the light source and have reflecting concave side surfaces with a curvature such that all light rays reflected in the longitudinal direction of the light source (1) will emerge in the longitudinal direction either directly or after reflection at an angle that is steeper than a light-specific masking angle ( beta ). The top sides (8) of the lamellae are covered by a flat reflecting cover, and the lamellae are shaped so as to form two lamellar sections that are symmetrical with the middle vertical longitudinal plane; their flat top sides, starting below the light source, form an angle with the longitudinal plane that approximately corresponds to the masking angle ( alpha ) and have the opposite slopes such that they are in tangential proximity to the light source (1) but do not come in contact with it, and they extend as far as the reflectors (2).

Description

Die vorliegende Erfindung betrifft eine Leuchte mit einer stabförmigen Lichtquelle und zu beiden Längsseiten der Lichtquelle bis oberhalb dieser sich erstreckender derart konkav gekrümmter Reflektoren, daß alle quer zur Lichtquelle abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem . leuchtenspezifischen Ausblendwinkeld in Querrichtung austreten und mit quer zur vertikalen mittleren Längsebene der Lichtquelle verlaufenden, im Querschnitt etwa V-förmigen Lamellen mit reflektierenden, derart konkav gekrümmten Seitenflächen, daß alle in Längsrichtung der Lichtquelle abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem leuchtenspezifischen Aüsblendwinkel ß in Längsrichtung austreten und die Oberseite der Lamellen durch eine ebene reflektierende Abdeckung verschlossen ist.The present invention relates to a luminaire with a rod-shaped light source and to both longitudinal sides of the light source up to this extending such concave reflectors that all rays emitted transversely to the light source directly or after reflection under a steeper than one. luminaire-specific blanking angle emerge in the transverse direction and with transverse to the vertical central longitudinal plane of the light source, cross-sectionally approximately V-shaped lamellae with reflective, concave curved side surfaces that all rays emitted in the longitudinal direction of the light source directly or after reflection under a steeper than a luminaire-specific blanking angle ß emerge in the longitudinal direction and the top of the slats is closed by a flat reflective cover.

In Leuchten der genannten Art wird die Oberfläche der quer zur Lichtquelle verlaufenden Lamellen deshalb spiegelnd ausgeführt, um auch die von oben auf die Lamellen auftreffenden Lichtstrahlen zu reflektieren und schließlich aus der Leuchte austreten zu lassen. Anderenfalls würde der Wirkungsgrad der Leuchte nicht unwesentlich herabgesetzt werden, da ja die Lamellen in verhältnismäßig kleinen Abständen zueinander angeordnet werden müssen, soll der angestrebte Zweck der Ausblendung flach austretender Strahlen erreicht werden. Ein wesentlicher Nachteil der bekannten Ausführung ist aber, daß die von der Oberseite der Lamellen reflektierten Strahlen zu einem erheblichen Teil flacher als vorgegeben austreten und damit für den Betrachter ein Spiegelbild der Lichtquelle entsteht, was letztlich doch zu einer Blendung führt. Besonders störend ist dieses Spiegelbild bei Arbeiten an Bildschirmgeräten. Um dies zu vermeiden, wurde bereits vorgeschlagen, die Oberseite der Lamellen zu schwärzen bzw. diese nach oben offen auszuführen; in beiden Fällen tritt jedoch der bereits erwähnte Wirkungsgradverlust auf, welcher bis zu 20 % betragen kann.In luminaires of the type mentioned, the surface of the lamellae running transversely to the light source is therefore designed to be reflective in order to also reflect the light rays hitting the lamellae from above and finally to let them emerge from the luminaire. Otherwise, the efficiency of the luminaire would be not insignificantly reduced, since the lamellae must be arranged at relatively small distances from one another, the intended purpose of masking out emerging rays should be achieved. A major disadvantage of the known design, however, is that the rays reflected from the top of the lamellae emerge for a considerable part flatter than specified, thus creating a mirror image of the light source for the viewer, which ultimately leads to glare. This reflection is particularly annoying when working on display devices. To avoid this, it has already been proposed to blacken the top of the slats or to make them open at the top; in both cases, however, the aforementioned loss of efficiency occurs, which can be up to 20%.

Weiterhin ist aus dem DE-GM 81 06 507 eine Leuchte mit einer langgestreckten Lampe bekannt, wobei zur Vermeidung von starken Aufhellungen im Bereich der oberhalb der Lamellen liegenden Reflektorblechabschnitte die Abdeckungen der Lamellen zur Lichtlenkung in den Raum oberhalb der Lampe entsprechend zur vertikalen Lampenebene geneigte Abschnitte aufweisen. Diese geneigten Abschnitte können beispielsweise konkav gekrümmt sein. Aufgrund dieser Ausgestaltung mögen zwar ein Teil der von der Lichtquelle reflektierten Strahlen in den Raum oberhalb der Lichtquelle von den geneigten Abdeckungen reflektiert werden, jedoch gerade in den kritischen Bereichen, wo die Lamellen in die Reflektoren übergehen, entstehen nach wie vor Reflexionen, die zu den unerwünschten Aufhellungen führen.Furthermore, from DE-GM 81 06 507 a lamp with an elongated lamp is known, with the covers of the slats for directing light into the space above the lamp in accordance with the vertical lamp plane to avoid strong brightening in the region of the reflector plate sections above the slats exhibit. These inclined sections can be concavely curved, for example. Due to this configuration, part of the rays reflected by the light source may be reflected in the space above the light source by the inclined covers, but precisely in the critical areas where the lamellae are pass into the reflectors, there are still reflections that lead to the undesirable brightening.

Der Erfindung liegt nun die Aufgabe zugrunde, ausgehend von einer Leuchte der eingangs beschriebenen Art, diese derart zu verbessern, daß der gesamte Abdeckungsbereich der Lamellen die auftreffenden Lichtstrahlen derart reflektiert, daß eine vollständige Blendfreiheit erreicht wird.The invention is based on the object, starting from a lamp of the type described above, to improve it in such a way that the entire coverage area of the slats reflects the incident light rays in such a way that complete freedom from glare is achieved.

Erfindungsgemäß wird dies dadurch erreicht, daß die Lamellen derart geformt sind, daß zwei zur mittleren Längsebene symmetrisch angeordnete Lamellenabschnitte entstehen, deren ebene Oberseiten, ausgehend von unterhalb der Lichtquelle, unter einem etwa dem Ausblendwinkel entsprechenden Neigungswinkel schräg zur Längsebene mit entgegengesetzter Steigung unter tangentialer, jedoch berührungsfreier Annäherung an die Lichtquelle bis zu den Reflektoren verlaufen. Erfindungsgemäß wird demnach nicht die Abdeckung der Lamelle gekrümmt ausgeführt, vielmehr ist die Abdeckung der Lamelle eben, und die Lamelle selbst hat einen zur Längsebene der Lichtquelle geneigten Verlauf, und zwar von unterhalb der Lichtquelle bis oberhalb der Lichtquelle. Dabei stellt dieser erfindungs- gemäße Verlauf der Lamellen sicher, daß Reflexionen im störenden Blinkwinkelbereich, der durch den Ausblendwinkelcx definiert ist, an den Reflektoren vermieden werden, da in diesem Bereich die Lamellen verlaufen. Unterhalb des Ausblendwinkels α wird erfindungsgemäß völlige Blendfreiheit erzielt, ohne daß dabei ein nennenswerter Wirkungsgradverlust durch Absorption der auf der Oberseite der Lamellen auftreffenden.Lichtstrahlen erfolgen würde. Die theoretisch beste Lösung bildet eine ebene Oberseite, welche die Lichtquelle tangential berühren würde. Aus konstruktiven und aus Toleranzgründen ist aber eine derartige Berührung der Lichtquelle durch die Lamellen nicht möglich. Aus diesem Grunde sieht die Erfindung eine tangentiale Annäherung der Oberseite der Lamellen an die Lichtquelle vor, wobei jedoch ein konstruktiv bedingter Abstand eingehalten wird.According to the invention this is achieved in that the lamellae are shaped such that two lamella sections are formed which are arranged symmetrically with respect to the central longitudinal plane, the flat top sides of which, starting from below the light source, at an inclination angle corresponding approximately to the fade-out angle obliquely to the longitudinal plane with an opposite slope under a tangential, however non-contact approach to the light source to the reflectors. According to the invention, the cover of the lamella is accordingly not curved, rather the cover of the lamella is flat, and the lamella itself has a slope inclined to the longitudinal plane of the light source, namely from below the light source to above the light source. It turns this fiction, - contemporary history of the blades ensures that reflections in disturbing viewing angle range which is defined by the Ausblendwinkelcx be avoided at the reflectors, since cross this area the slats. Below the blanking angle α, complete freedom from glare is achieved according to the invention without a significant loss of efficiency due to absorption of the light rays striking the top of the slats. The theoretically best solution is a flat top, which would touch the light source tangentially. Out constructive and for reasons of tolerance, such a contact of the light source through the slats is not possible. For this reason, the invention provides for a tangential approach of the top of the lamellae to the light source, however, a constructionally determined distance is maintained.

Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen enthalten.Advantageous embodiments of the invention are contained in the subclaims.

Anhand der Figuren wird nun die Erfindung näher erläutert. Es zeigen:

  • Fig. 1 in schematischer Form einen Querschnitt durch eine bekannte Leuchte gemäß dem Stand der Technik,
  • Fig. 2 einen Längsschnitt durch die Leuchte gemäß Fig. 1,
  • Fig. 3 einen Querschnitt durch eine erfindungsgemäße Leuchte.
The invention will now be explained in more detail with reference to the figures. Show it:
  • 1 in schematic form a cross section through a known lamp according to the prior art,
  • 2 shows a longitudinal section through the lamp according to FIG. 1,
  • Fig. 3 shows a cross section through a lamp according to the invention.

Leuchten der bekannten Art, siehe Fig. 1, weisen eine stabförmige-Lichtquelle (Leuchtröhre) 1 auf, um welche ein Reflektor 2 angeordnet ist. Dessen Kontur ist derart bestimmt, daß jeder durch ihn reflektierte Lichtstrahl steiler als jener Strahl 3 die Leuchte verläßt, der die Lichtquelle an ihrem unteren Rand und die untere Kante des Reflektors 2 berührt. Der Winkeld ist demnach der Ausblendwinkel in Querrichtung.Lights of the known type, see Fig. 1, have a rod-shaped light source (fluorescent tube) 1, around which a reflector 2 is arranged. Its contour is determined such that each light beam reflected by it leaves the lamp steeper than that beam 3 which touches the light source at its lower edge and the lower edge of the reflector 2. The angle field is therefore the cross-fade-out angle.

Um auch in Längsrichtung der Leuchte eine Blendung durch flach austretende Strahlen zu verhindern, siehe Fig. 2, sind quer zur Längsachse der Lichtquelle 1 Lamellen 4 vorgesehen, deren Höhe und gegenseitiger Abstand derart gewählt sind, daß alle Strahlen durch die konkaven Seitenflächen 5 reflektiert werden, welche die Lichtquelle flacher als jener Strahl 6 verlassen, der die obere bzw. untere Kante der gegenüberliegenden Seitenflächen 5 zweier benachbarter Lamellen 4 tangiert. Dieser Strahl 6 bildet mit der Horizontalen einen Winkel ß. Der Winkel ß ist der Ausblendwinkel in Längsrichtung und ist in der Regel von derselben Größenordnung wie der Winkel α in Querrichtung.In order to prevent glare from flatly emerging rays in the longitudinal direction of the lamp as well, see FIG. 2, slats 4 are provided transversely to the longitudinal axis of the light source 1, the height and mutual distance of which are such are selected so that all rays are reflected by the concave side surfaces 5, which leave the light source flatter than that beam 6, which affects the upper or lower edge of the opposite side surfaces 5 of two adjacent slats 4. This beam 6 forms an angle β with the horizontal. The angle β is the blanking angle in the longitudinal direction and is generally of the same order of magnitude as the angle α in the transverse direction.

Wie Fig. 1 zeigt, gibt es Strahlen, welche die Leuchte unter einem Winkel verlassen, welcher kleiner als der Winkel « ist, wenn die Oberseite 8 der Lamellen 4 zur Vermeidung von Lichtverlusten spiegelnd ausgeführt ist. Dies wird anhand des Strahles 7 näher erläutert. Die Neigung der Reflektorwand im Punkt 9 ist so bestimmt, daß ein vom unteren Rand der Lichtquelle 1 ausgehender Strahl dort unter dem Winkel α zur Waagerechten reflektiert wird. Der Strahl 7 jedoch, welcher kurz vorher an der Oberseite 8 der Lamelle 4 nach oben reflektiert wird, wird am Punkt 9 weniger stark nach unten umgelenkt und verläßt die Leuchte unter einem Winkel γ , welcher kleiner als der Ausblendwinkelck ist. Wie in Fig. 2 angedeutet, betrifft diese Erscheinung nur Strahlen, welche aus der Lichtquelle 1 schräg austreten. Insgesamt ergibt sich jedoch für einen verhältnismäßig flach auf die Leuchte hochblickenden Beschauer ein Spiegelbild der Lichtquelle 1 und damit eine Blendung.As shown in FIG. 1, there are rays which leave the lamp at an angle which is smaller than the angle if the upper side 8 of the slats 4 is designed to be mirror-like to avoid light losses. This is explained in more detail using the beam 7. The inclination of the reflector wall at point 9 is determined such that a beam emanating from the lower edge of the light source 1 is reflected there at an angle α to the horizontal. However, the beam 7, which is reflected upwards shortly beforehand on the upper side 8 of the lamella 4, is deflected downward less strongly at point 9 and leaves the lamp at an angle γ which is smaller than the corner angle. As indicated in FIG. 2, this phenomenon only affects rays that emerge at an angle from the light source 1. Overall, however, a mirror image of the light source 1 and thus glare results for a viewer looking up at the lamp relatively flat.

In Fig. 3 ist eine erfindungsgemäße Leuchte dargestellt, wobei die vorbeschriebene Blendung vermieden wird. Hierzu weisen die Lamellen 4 einen Verlauf ihrer Oberseite 8 derart auf, daß zwei Lamellenabschnitte entstehen, die symmetrisch zur mittleren vertikalen Längsebene der Lichtquelle 1 angeordnet sind, wobei die Oberseiten 8, ausgehend von unterhalb der Lichtquelle 1, unter einem etwa dem Ausblendwinkel ci entsprechenden Neigungswinkel zur Horizontalen schräg zur Längsebene mit entgegengesetzter Steigung verlaufen. Dabei ergibt sich eine tangentiale, jedoch berührungsfreie Annäherung der ebenen Oberseiten 8 an die Lichtquelle 1. Die beiden Lamellenabschnitte enden in den seitlichen Reflektoren 2. Dabei ist jedoch ein gewisser Abstand der ebenen Oberflächen 8 zur Lichtquelle aus Toleranz- und Herstellungsgründen eingehalten, so daß sich der erfindungsgemäß angestrebte tangentiale Verlauf mit tangentialer Berührung nicht ergibt. Dadurch ergibt sich jedoch beim Gebrauch der erfindungsgemäßen Leuchte kein meßbarer Nachteil. Weiterhin ist erfindungsgemäß vorgesehen, daß die beiden geneigten Lamellenabschnitte durch einen senkrecht zur mittleren Längsebene der Lichtquelle 1 verlaufenden Lamellenabschnitt 10 verbunden sind, so daß sich unterhalb der Lichtquelle 1 ein horizontaler Lamellenverlauf ergibt. Ideal wäre hier ein Lamellenverlauf entsprechend der Oberfläche der Lichtquelle. Aus Herstellungsgründen ist jedoch der horizontale Lameilenabschnitt vorzuziehen. Weiterhin ist es vorteilhaft, daß die untere Längskante der Lamellen 4 parallel zur Lamellenoberseite 8 verläuft. Hierdurch unterscheidet sich die Breite der erfindungsgemäßen Lamelle nicht von denen der in den Fig. 1 und 2 bekannten Ausführungsform, und es werden Lichtverluste vermieden, die bei einer breiteren Lamellenform auftreten würden.In Fig. 3, a lamp according to the invention is shown, wherein the glare described above is avoided. For this purpose, the slats 4 have a course of their top 8 in such a way that two slat sections are formed which are symmetrical to the central vertical longitudinal plane of the Light source 1 are arranged, the upper sides 8, starting from below the light source 1, at an inclination angle corresponding to the blanking angle ci to the horizontal, obliquely to the longitudinal plane with an opposite slope. This results in a tangential, but non-contact approach of the flat upper sides 8 to the light source 1. The two lamella sections end in the side reflectors 2. However, a certain distance between the flat surfaces 8 and the light source is maintained for reasons of tolerance and manufacturing, so that the tangential course desired according to the invention with tangential contact does not result. However, this does not result in a measurable disadvantage when using the lamp according to the invention. It is further provided according to the invention that the two inclined slat sections are connected by a slat section 10 running perpendicular to the central longitudinal plane of the light source 1, so that a horizontal slat course results below the light source 1. A slat course corresponding to the surface of the light source would be ideal here. For manufacturing reasons, however, the horizontal lamella section is preferable. It is also advantageous that the lower longitudinal edge of the slats 4 runs parallel to the top 8 of the slats. As a result, the width of the slat according to the invention does not differ from that of the embodiment known in FIGS. 1 and 2, and light losses that would occur with a wider slat shape are avoided.

Wie am Beispiel des Strahles 7a in Fig. 3 gezeigt ist, welcher die Lichtquelle 1 am gleichen Punkt und unter demselben Winkel verläßt wie der Strahl 7 in Fig. 1, wird der Strahl 7a stärker als der Strahl 7 nach oben umgelenkt und verläßt die erfindungsgemäße Leuchte nach Reflexion am Reflektor 2 sehr steil, so daß eine blendfreie Abstrahlung von der Lichtquelle 1 erfolgt.As shown in the example of the beam 7a in Fig. 3, which leaves the light source 1 at the same point and at the same angle as the beam 7 in Fig. 1, the beam 7a is deflected upward more than the beam 7 and leaves the inventive Luminaire after reflection on reflector 2 very steep, so that glare-free radiation from light source 1 takes place.

Claims (3)

1. Leuchte mit einer stabförmigen Lichtquelle (1) und zu beiden Längsseiten der Lichtquelle (1) bis oberhalb dieser sich erstreckender derart konkav gekrümmter Reflektoren (2), daß alle quer zur Lichtquelle (1) abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem leuchtenspezifischen Ausblendwinkel α in Querrichtung austreten und mit quer zur vertikalen mittleren Längsebene der Lichtquelle (1) verlaufenden, im Querschnitt etwa V-förmigen Lamellen (4) mit reflektierenden und derart konkav gekrümmten Seitenflächen, daß alle in Längsrichtung der Lichtquelle (1) abgestrahlten Strahlen direkt oder nach Reflexion unter einem steileren als einem leuchtenspezifischen Ausblendwinkel ß in Längsrichtung austreten und die Oberseiten (8) der Lamellen (4) durch eine ebene reflektierende Abdeckung verschlossen sind, dadurch gekennzeichnet, daß die Lamellen (4) derart geformt sind, daß zwei zur mittleren vertikalen Längsebene symmetrisch angeordnete Lamellenabschnitte entstehen, deren ebene Oberseiten ausgehend unterhalb der Lichtquelle (1) unter . einem etwa dem Ausblendwinkel α entsprechenden Neigungswinkel schräg zur Längsebene mit entgegengesetzter Steigung unter tangentialer, jedoch berührungsfreier Annäherung an die Lichtquelle (1) bis zu den Reflektoren (2) verlaufen.1. Luminaire with a rod-shaped light source (1) and on both long sides of the light source (1) to above this extending such concave curved reflectors (2) that all rays emitted transversely to the light source (1) directly or after reflection under a steeper than a lamp-specific blanking angle α emerge in the transverse direction and with transverse to the vertical central longitudinal plane of the light source (1), cross-sectionally approximately V-shaped lamellae (4) with reflective and concave curved side surfaces that all rays emitted in the longitudinal direction of the light source (1) Exit directly or after reflection at a steeper than a lamp-specific cut-out angle β in the longitudinal direction and the upper sides (8) of the slats (4) are closed by a flat reflective cover, characterized in that the lamellae (4) are shaped in such a way that two lamella sections are formed which are arranged symmetrically to the central vertical longitudinal plane, the flat upper sides of which, starting from below the light source (1). an inclination angle corresponding approximately to the fade-out angle α runs obliquely to the longitudinal plane with an opposite slope under tangential but non-contact approach to the light source (1) to the reflectors (2). 2. Leuchte nach Anspruch 1, dadurch gekennzeichnet, daß die beiden geneigten Lamellenabschnitte durch einen senkrecht zur mittleren Längsebene der Lichtquelle (1) verlaufenden Lamellenabschnitt (10) verbunden sind, dessen Länge kleiner ist als der Durchmesser der Lichtquelle (1).2. Lamp according to claim 1, characterized in that the two inclined lamella sections are connected by a perpendicular to the central longitudinal plane of the light source (1) extending lamella section (10), the length of which is smaller than the diameter of the light source (1). 3. Leuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die untere Längskante der Lamellen (4) parallel zur Lamellenoberseite (8) verläuft.3. Luminaire according to claim 1 or 2, characterized in that the lower longitudinal edge of the slats (4) runs parallel to the top of the slats (8).
EP83112800A 1983-04-08 1983-12-20 Non-dazzling light fixture with an elongated light source Expired EP0122972B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25445/84A AU561926B2 (en) 1983-04-08 1984-03-09 Nonglare light fixture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1246/83 1983-04-08
AT0124683A AT381577B (en) 1983-04-08 1983-04-08 GLARE-FREE LAMP FOR A ROD-SHAPED LIGHT SOURCE

Publications (2)

Publication Number Publication Date
EP0122972A1 true EP0122972A1 (en) 1984-10-31
EP0122972B1 EP0122972B1 (en) 1987-10-28

Family

ID=3509757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112800A Expired EP0122972B1 (en) 1983-04-08 1983-12-20 Non-dazzling light fixture with an elongated light source

Country Status (7)

Country Link
US (1) US4539628A (en)
EP (1) EP0122972B1 (en)
JP (1) JPS60205903A (en)
AT (2) AT381577B (en)
CA (1) CA1220460A (en)
DE (1) DE3374213D1 (en)
ZA (1) ZA841999B (en)

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Publication number Priority date Publication date Assignee Title
DE3440028A1 (en) * 1983-11-03 1985-05-15 Sabir S.A., Belleville-sur-Saone, Rhône Glare protection device for luminous elements having a linear light source
EP0138747B1 (en) * 1983-10-18 1988-01-20 Semperlux GmbH Parabolic strip element for elongated lamps
EP0271150A1 (en) * 1986-12-08 1988-06-15 "Etap" Luminaire with mirror reflectors capable of protecting against troublesome light spots
EP0309832A1 (en) * 1987-09-28 1989-04-05 Siemens Aktiengesellschaft Lighting fixture
DE3900202A1 (en) * 1989-01-05 1990-07-12 Thorn Licht Gmbh GRID LAMP EQUIPPED WITH A STAINLESS FLUORESCENT LAMP
FR2734044A1 (en) * 1995-05-11 1996-11-15 Vial Henri Noel Cellular diffuser for fluorescent light fitting
US5944411A (en) * 1996-10-08 1999-08-31 U.S. Philips Corporation Luminaire slat with v-shaped cross section
WO2001065171A3 (en) * 2000-02-29 2002-02-28 Lt Licht Technik Gmbh Reflector arrangement for a lamp
AT500432A1 (en) * 2003-04-07 2005-12-15 Bartenbach Christian ILLUMINATION DEVICE
NL1027815C2 (en) 2004-12-17 2006-06-20 Lichtholland B V Lamella (52) is for a reflector (2) for a light fitting for a tube lamp and comprises two opposing main sides, an upper side and a lower side (8), all sides having a light-reflecting surface

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DE3406447C2 (en) * 1984-02-22 1995-03-16 Christian Bartenbach Shielding for a lamp with a rod-shaped lamp
JPS644168Y2 (en) * 1984-12-20 1989-02-03
HU195593B (en) * 1985-10-01 1988-05-30 Tungsram Reszvenytarsasag Light-source, preferably for public lighting and industrial applications
US4750097A (en) * 1985-10-25 1988-06-07 Optech Inc. Lamp reflector assembly
US4754381A (en) * 1986-01-02 1988-06-28 Downs James W Ellipsoidal reflector concentration of energy system
DE8702921U1 (en) * 1987-02-25 1987-07-30 Metaprint Metallverarbeitung GmbH, 8000 München lamp
JP2917996B2 (en) * 1989-06-19 1999-07-12 東芝ライテック株式会社 lighting equipment
US5469341A (en) * 1993-09-10 1995-11-21 Public Safety Equipment, Inc. Light bar with reflector assembly
DE69608044T2 (en) * 1995-02-14 2001-01-11 Koninklijke Philips Electronics N.V., Eindhoven LAMP
AU6475296A (en) * 1995-08-04 1997-03-05 Pang Teng Ong Process for producing the profile of reflectors for a cylindical source of light and reflector obtained according to thi process
US5528478A (en) * 1995-10-04 1996-06-18 Cooper Industries, Inc. Lighting fixture having a parabolic louver
FR2742213B1 (en) * 1995-12-08 1998-02-27 Hode Jean Pierre CEILING REFLECTIVE OPTICS
USD377231S (en) * 1996-03-19 1997-01-07 Cooper Industries, Inc. Luminaire
ES2272038T3 (en) * 1998-05-19 2007-04-16 Koninklijke Philips Electronics N.V. LUMINARY.
GB9908728D0 (en) * 1999-04-17 1999-06-09 Luxonic Lightng Plc A lighting appliance
CN1268871C (en) * 1999-11-12 2006-08-09 皇家菲利浦电子有限公司 Luminaire without lamellae
CN1625667B (en) * 2002-01-28 2012-12-05 皇家飞利浦电子股份有限公司 Luminaire with lamellas for tubular lamp
GB2415770A (en) * 2004-07-01 2006-01-04 Jamie Barrett A lamp sculpture
DE112014004071T5 (en) * 2013-09-05 2016-06-09 Applied Materials, Inc. Lamp cross-section for reduced coil heating

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NL8200926A (en) * 1981-03-07 1982-10-01 Trilux Lenze Gmbh & Co Kg LIGHTING LUMINAIRES WITH AN ELECTRONIC LAMP AND A MIRROR GRADE INCLUDED THEREIN.

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0138747B1 (en) * 1983-10-18 1988-01-20 Semperlux GmbH Parabolic strip element for elongated lamps
DE3440028A1 (en) * 1983-11-03 1985-05-15 Sabir S.A., Belleville-sur-Saone, Rhône Glare protection device for luminous elements having a linear light source
EP0271150A1 (en) * 1986-12-08 1988-06-15 "Etap" Luminaire with mirror reflectors capable of protecting against troublesome light spots
EP0309832A1 (en) * 1987-09-28 1989-04-05 Siemens Aktiengesellschaft Lighting fixture
DE3900202A1 (en) * 1989-01-05 1990-07-12 Thorn Licht Gmbh GRID LAMP EQUIPPED WITH A STAINLESS FLUORESCENT LAMP
FR2734044A1 (en) * 1995-05-11 1996-11-15 Vial Henri Noel Cellular diffuser for fluorescent light fitting
US5944411A (en) * 1996-10-08 1999-08-31 U.S. Philips Corporation Luminaire slat with v-shaped cross section
WO2001065171A3 (en) * 2000-02-29 2002-02-28 Lt Licht Technik Gmbh Reflector arrangement for a lamp
AT500432A1 (en) * 2003-04-07 2005-12-15 Bartenbach Christian ILLUMINATION DEVICE
AT500432B1 (en) * 2003-04-07 2006-03-15 Bartenbach Christian ILLUMINATION DEVICE
NL1027815C2 (en) 2004-12-17 2006-06-20 Lichtholland B V Lamella (52) is for a reflector (2) for a light fitting for a tube lamp and comprises two opposing main sides, an upper side and a lower side (8), all sides having a light-reflecting surface

Also Published As

Publication number Publication date
AT381577B (en) 1986-11-10
US4539628A (en) 1985-09-03
ATE30462T1 (en) 1987-11-15
JPS60205903A (en) 1985-10-17
ATA124683A (en) 1986-03-15
JPH0418641B2 (en) 1992-03-27
DE3374213D1 (en) 1987-12-03
ZA841999B (en) 1985-06-26
CA1220460A (en) 1987-04-14
EP0122972B1 (en) 1987-10-28

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