EP0336244B1 - Light fitting with a transparent housing - Google Patents

Light fitting with a transparent housing Download PDF

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Publication number
EP0336244B1
EP0336244B1 EP89105335A EP89105335A EP0336244B1 EP 0336244 B1 EP0336244 B1 EP 0336244B1 EP 89105335 A EP89105335 A EP 89105335A EP 89105335 A EP89105335 A EP 89105335A EP 0336244 B1 EP0336244 B1 EP 0336244B1
Authority
EP
European Patent Office
Prior art keywords
light
reflector
carrier material
lamp
light source
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.)
Expired - Lifetime
Application number
EP89105335A
Other languages
German (de)
French (fr)
Other versions
EP0336244A2 (en
EP0336244A3 (en
Inventor
Sigurd Dipl.-Ing. Schwengler
Friedrich-Wilhelm Dipl.-Ing. Müller
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to AT89105335T priority Critical patent/ATE99790T1/en
Publication of EP0336244A2 publication Critical patent/EP0336244A2/en
Publication of EP0336244A3 publication Critical patent/EP0336244A3/en
Application granted granted Critical
Publication of EP0336244B1 publication Critical patent/EP0336244B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape

Definitions

  • the invention relates to a luminaire with a transparent luminaire housing and a reflector arranged within the luminaire housing and assigned to a light source and made of a translucent carrier material with a partially transparent reflection layer in the visual wavelength range.
  • Such a lamp is known from DE-C 861 090.
  • the light source is surrounded by a reflector made of glass, which is mirrored so that about half of the light rays striking it can pass through unhindered and only the remaining part of the light is reflected.
  • this luminaire which is preferably suitable for medical workplaces and treatment stations, in addition to brightening the surrounding space, spotlighting of the work area is particularly to be achieved.
  • a partially permeable evaporated reflector made of a transparent plastic is known, so that a part of the light coming from the lamp shines through here too. If such a reflector is installed in a luminaire with a transparent housing, this has at night, i.e. during lamp operation, a very different appearance from the day's impression, which is considered unsatisfactory. A luminaire that looks aesthetic during the day with a reflector and good light-directing properties regularly loses the usual shape impression at night.
  • the invention has for its object the visual of a lamp with a transparent lamp housing despite the use of a reflector for light control To match the appearance of the luminaire housing with the light source switched on during the night to the appearance during the day and to obtain the most uniform possible brightness distribution on the surface of the luminaire housing when there is a sufficient amount of directed light on a usable area.
  • the advantage of the invention is that due to the partially transparent vapor deposition of the reflector, part of the light emanating from the light source reaches the clouded carrier material through the reflective layer.
  • the clouding causes this light component to scatter, so that the shape impression of the luminaire housing is maintained during the night when the light source is switched on.
  • the exterior lamp shown has a spherical lamp housing (1) which is formed from a narrow, ring-shaped central part (1a) and its covers (1b) which close both open sides.
  • the two approximately bowl-shaped covers are made of transparent material, preferably provided with a surface design in addition to a light structure, and give the luminaire attached to a mast (2) a certain characteristic appearance during the day.
  • a light source (3) for example an ellipsoidal bulb-shaped high-pressure lamp and merely indicated fittings (4) are attached to the central part (1a) within the lamp housing.
  • a hood-shaped reflector (5) is arranged around the light source (3) as an element essential to the invention, the outer reflector Contour is not perceived by the eye of a viewer during the day or is only perceived as a slight shadow.
  • the reflector (5) consists of a cloudy, translucent plastic carrier material, preferably of polymethyl methacrylate (PMMA) or of polycarbonate (PC).
  • the base body of the reflector can be produced from such a carrier material, in particular by hot deformation, and is then vapor-coated on its inside facing the lamp with a partially transparent reflection layer. Evaporation is usually carried out in a vacuum, the evaporated amount of the coating material, for example aluminum, specifying the thickness of the reflection layer. Ultimately, this also allows the proportions of the reflected and transmitted light to be determined.
  • the light source (3) When the light source (3) is switched on, the light emanating from it is thus predominantly reflected onto a usable surface by means of the reflection layer, so that a good lighting efficiency of the luminaire is guaranteed.
  • the remaining portion of the light reaches the clouded carrier material through the reflective layer which is partially vapor-permeable in the visual wavelength range. This scatters the residual light within the luminaire housing onto the covers, which thus appear uniformly illuminated in a technically satisfactory manner. Since the reflector does not stand out as a dark shadow, the shape of the lamp is maintained even at night.
  • the visual appearance at night can be optimized and adapted to the day's impression. In any case, a sufficiently high proportion of directed light remains on the usable area to be illuminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Road Signs Or Road Markings (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Endoscopes (AREA)
  • Push-Button Switches (AREA)
  • Pens And Brushes (AREA)

Abstract

Despite the use of a reflector (5) for directing the light, it is the aim in an outdoor-lighting fitting having a transparent lighting fitting housing (1) to obtain the visual outward appearance when the light source (3) is switched on in a manner adapted to the outward appearance in daytime, and to obtain in the event of a sufficiently high proportion of light directed onto a working surface as uniform as possible a distribution of brightness on the surface of the lighting fitting housing (1). This is achieved by using for the body of the reflector (5) a cloudy, translucent carrier material which is evaporated on with a partially transmitting reflective layer in the visual wavelength region. It is thus possible, in particular, for light fittings in pedestrian zones to be attractively styled and at the same time optimised in terms of lighting technology. <IMAGE>

Description

Die Erfindung betrifft eine Leuchte mit einem transparenten Leuchtengehäuse und einem innerhalb des Leuchtengehäuses angeordneten, einer Lichtquelle zugeordneten Reflektor aus einem durchscheinenden Trägermaterial mit einer teildurchlässigen Reflexionsschicht im visuellen Wellenlängenbereich.The invention relates to a luminaire with a transparent luminaire housing and a reflector arranged within the luminaire housing and assigned to a light source and made of a translucent carrier material with a partially transparent reflection layer in the visual wavelength range.

Eine solche Leuchte ist aus der DE-C 861 090 bekannt. Dabei ist die Lichtquelle von einem Reflektor aus Glas umgeben, der so verspiegelt ist, daß etwa die Hälfte der auf ihn auftreffenden Lichtstrahlen ungehindert hindurchtreten kann und nur der restliche Teil des Lichtes reflektiert wird. Mit dieser vorzugsweise für medizinische Arbeits- und Behandlungsplätze geeigneten Leuchte soll neben einer Erhellung des umgebenden Raumes besonders eine punktförmige Ausleuchtung des Arbeitsfeldes erzielt werden.Such a lamp is known from DE-C 861 090. The light source is surrounded by a reflector made of glass, which is mirrored so that about half of the light rays striking it can pass through unhindered and only the remaining part of the light is reflected. With this luminaire, which is preferably suitable for medical workplaces and treatment stations, in addition to brightening the surrounding space, spotlighting of the work area is particularly to be achieved.

Desweiteren ist aus der FR-A 2 125 297 ein teildurchlässig bedampfter Reflektor aus einem transparenten Kunststoff bekannt, so daß auch hier ein Teil des von der Lampe ausgehenden Lichtes durchscheint. Wird ein solcher Reflektor in eine Leuchte mit einem transparenten Gehäuse eingebaut, so hat dieses des nachts, d.h. während des Lampenbetriebes, ein vom Tageseindruck sehr abweichendes Erscheinungsbild, welches als unbefriedigend angesehen wird. Eine am Tage ästhetisch wirkende Leuchte mit einem Reflektor und guten lichtlenkenden Eigenschaften verliert somit bei Nacht regelmäßig den gewohnten Formeindruck.Furthermore, from FR-A 2 125 297 a partially permeable evaporated reflector made of a transparent plastic is known, so that a part of the light coming from the lamp shines through here too. If such a reflector is installed in a luminaire with a transparent housing, this has at night, i.e. during lamp operation, a very different appearance from the day's impression, which is considered unsatisfactory. A luminaire that looks aesthetic during the day with a reflector and good light-directing properties regularly loses the usual shape impression at night.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Leuchte mit transparentem Leuchtengehäuse trotz Verwendung eines Reflektors zur Lichtlenkung das visuelle Erscheinungsbild des Leuchtengehäuses bei eingeschalteter Lichtquelle während der Nacht dem Erscheinungsbild bei Tag anzugleichen und bei genügend hohem Anteil gerichteten Lichtes auf eine Nutzfläche eine möglichst gleichmäßige Helligkeitsverteilung auf der Oberfläche des Leuchtengehäuses zu erhalten.The invention has for its object the visual of a lamp with a transparent lamp housing despite the use of a reflector for light control To match the appearance of the luminaire housing with the light source switched on during the night to the appearance during the day and to obtain the most uniform possible brightness distribution on the surface of the luminaire housing when there is a sufficient amount of directed light on a usable area.

Diese Aufgabe wird durch eine Leuchte mit den kennzeichnenden Merkmalen des Anspruchs(1) gelöst. Weiterbildungen der Erfindung sind Gegenstände der Unteransprüche.This object is achieved by a lamp with the characterizing features of claim (1). Developments of the invention are the subject of the dependent claims.

Der Vorteil der Erfindung liegt darin, daß aufgrund der teildurchlässigen Bedampfung des Reflektors ein Teil des von der Lichtquelle ausgehenden Lichtes durch die Reflexionsschicht hindurch in das eingetrübte Trägermaterial gelangt. Die Eintrübung bewirkt eine Streuung dieses Lichtanteiles, so daß der Formeindruck des Leuchtengehäuses bei eingeschalteter Lichtquelle während der Nacht erhalten bleibt.The advantage of the invention is that due to the partially transparent vapor deposition of the reflector, part of the light emanating from the light source reaches the clouded carrier material through the reflective layer. The clouding causes this light component to scatter, so that the shape impression of the luminaire housing is maintained during the night when the light source is switched on.

Anhand der aus einer Fig. bestehenden Zeichnung wird die Erfindung nachstehend näher erläutert.The invention is explained in more detail below with the aid of the drawing consisting of a FIG.

Die gezeigte Außenleuchte hat ein kugelförmiges Leuchtengehäuse (1), welches aus einem schmalen ringförmigen Mittelteil (1a) und dessen beide offenen Seiten verschließenden Abdeckungen(1b) gebildet ist. Die beiden etwa schalenförmigen Abdeckungen sind aus transparentem Material, vorzugsweise versehen mit einem Oberflächendessin nebst leichter Struktur, und geben durch ihre Form der an einem Mast (2) befestigten Leuchte bei Tag ein bestimmtes charakteristisches Erscheinungsbild. Innerhalb des Leuchtengehäuses sind eine Lichtquelle (3), beispielsweise eine ellipsoidkolbenförmige Hochdrucklampe und lediglich angedeutete Armaturen (4) am Mittelteil(1a) befestigt. Um die Lichtquelle (3) ist als erfindungswesentliches Element ein haubenförmiger Reflektor (5) angeordnet, dessen äußere Kontur bei Tag vom Auge eines Betrachters gar nicht oder nur als leichter Schatten wahrgenommen wird.The exterior lamp shown has a spherical lamp housing (1) which is formed from a narrow, ring-shaped central part (1a) and its covers (1b) which close both open sides. The two approximately bowl-shaped covers are made of transparent material, preferably provided with a surface design in addition to a light structure, and give the luminaire attached to a mast (2) a certain characteristic appearance during the day. A light source (3), for example an ellipsoidal bulb-shaped high-pressure lamp and merely indicated fittings (4) are attached to the central part (1a) within the lamp housing. A hood-shaped reflector (5) is arranged around the light source (3) as an element essential to the invention, the outer reflector Contour is not perceived by the eye of a viewer during the day or is only perceived as a slight shadow.

Der Reflektor (5) besteht aus einem eingetrübten, durchscheinenden Kunststoff-Trägermaterial, vorzugsweise aus Polymethyl-Methacrylat (PMMA) oder aus Polycarbonat (PC). Aus einem solchen Trägermaterial läßt sich insbesondere durch Warmverformung der Reflektor-Grundkörper herstellen, der anschließend auf seiner der Lampe zugekehrten Innenseite mit einer teildurchlässigen Reflexionsschicht bedampft ist. Die Bedampfung erfolgt zumeist im Vakuum, wobei die verdampfte Menge des Beschichtungsmaterials, beispielsweise Aluminium, die Dicke der Reflexionsschicht vorgibt. Dadurch lassen sich letztlich auch die Anteile des reflektierten und des durchgelassenen Lichtes bestimmen.The reflector (5) consists of a cloudy, translucent plastic carrier material, preferably of polymethyl methacrylate (PMMA) or of polycarbonate (PC). The base body of the reflector can be produced from such a carrier material, in particular by hot deformation, and is then vapor-coated on its inside facing the lamp with a partially transparent reflection layer. Evaporation is usually carried out in a vacuum, the evaporated amount of the coating material, for example aluminum, specifying the thickness of the reflection layer. Ultimately, this also allows the proportions of the reflected and transmitted light to be determined.

Bei eingeschalteter Lichtquelle (3) wird das von ihr ausgehende Licht somit überwiegend mittels der Reflexionsschicht gerichtet auf eine Nutzfläche reflektiert, so daß ein guter lichttechnischer Wirkungsgrad der Leuchte garantiert ist. Der Restanteil des Lichtes gelangt durch die im visuellen Wellenlängenbereich teildurchlässig bedampfte Reflexionsschicht in das eingetrübte Trägermaterial. Dieses streut das Restlicht innerhalb des Leuchtengehäuses auf die Abdeckungen, die damit in technisch befriedigender Weise gleichmäßig erhellt wirken. Da sich der Reflektor zudem nicht als dunkler Schatten abhebt, wird der Formeindruck der Leuchte auch bei Nacht beibehalten. Je nach der Eintrübung des verwendeten durchscheinenden Trägermaterials und der Durchlässigkeit der Reflexionsschicht läßt sich so das visuelle Erscheinungsbild bei Nacht optimieren und dem Tageseindruck anpassen. In jedem Fall verbleibt ein genügend hoher Anteil gerichteten Lichtes auf der zu beleuchtenden Nutzfläche.When the light source (3) is switched on, the light emanating from it is thus predominantly reflected onto a usable surface by means of the reflection layer, so that a good lighting efficiency of the luminaire is guaranteed. The remaining portion of the light reaches the clouded carrier material through the reflective layer which is partially vapor-permeable in the visual wavelength range. This scatters the residual light within the luminaire housing onto the covers, which thus appear uniformly illuminated in a technically satisfactory manner. Since the reflector does not stand out as a dark shadow, the shape of the lamp is maintained even at night. Depending on the clouding of the translucent carrier material used and the permeability of the reflection layer, the visual appearance at night can be optimized and adapted to the day's impression. In any case, a sufficiently high proportion of directed light remains on the usable area to be illuminated.

Claims (3)

  1. Lamp with a transparent lamp housing (1) and a reflector (5), which is arranged within the lamp housing (1) and associated with a light source (3), of a translucent carrier material with a partially permeable reflection layer in the visual wavelength range, characterised thereby that a darkened carrier material, on which the reflection layer is vapour deposited, is used for the reflector base body (5).
  2. Lamp according to claim 1, characterised thereby that the carrier material is a polymethyl-methacrylate (PMMA).
  3. Lamp according to claim 1, characterised thereby that the carrier material is a polycarbonate (PC).
EP89105335A 1988-04-02 1989-03-25 Light fitting with a transparent housing Expired - Lifetime EP0336244B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89105335T ATE99790T1 (en) 1988-04-02 1989-03-25 LUMINAIRE WITH TRANSPARENT LUMINAIRE HOUSING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3811297A DE3811297A1 (en) 1988-04-02 1988-04-02 LAMP WITH TRANSPARENT LAMP HOUSING
DE3811297 1988-04-02

Publications (3)

Publication Number Publication Date
EP0336244A2 EP0336244A2 (en) 1989-10-11
EP0336244A3 EP0336244A3 (en) 1990-05-02
EP0336244B1 true EP0336244B1 (en) 1994-01-05

Family

ID=6351342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89105335A Expired - Lifetime EP0336244B1 (en) 1988-04-02 1989-03-25 Light fitting with a transparent housing

Country Status (6)

Country Link
EP (1) EP0336244B1 (en)
AT (1) ATE99790T1 (en)
DE (2) DE3811297A1 (en)
DK (1) DK111389A (en)
FI (1) FI891558A (en)
NO (1) NO891394L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29721547U1 (en) * 1997-12-08 1998-08-13 Reichard Ulrich Work lamp with a gas discharge lamp and a diffuser
DE19801128A1 (en) * 1998-01-14 1999-07-15 Zumtobel Staff Gmbh Reflector for a light source, especially for room lighting

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE861090C (en) * 1950-04-21 1952-12-29 Emda Work light, especially for the dental practice
ES388222A1 (en) * 1971-02-12 1973-09-01 Rubio Reqena Luminaire system by reflection-transmission. (Machine-translation by Google Translate, not legally binding)
DE2649104A1 (en) * 1976-10-28 1978-05-03 Gantenbrink Leuchten Ohg Globe shaped lamp for even illumination - has high intensity bulb shaded by opal hood to provide dazzle-free lighting
DE3112973A1 (en) * 1981-04-01 1982-10-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Optical system of an exterior luminaire
DE3230491A1 (en) * 1982-08-17 1984-02-23 Robert Bosch Gmbh, 7000 Stuttgart Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles
DE3330319A1 (en) * 1983-08-23 1985-03-07 Knut Otto 6580 Idar-Oberstein Saßmannshausen Headlamp
DE3339789C2 (en) * 1983-11-03 1985-09-19 Jürgen 8022 Grünwald Brandt Medical lamp

Also Published As

Publication number Publication date
EP0336244A2 (en) 1989-10-11
EP0336244A3 (en) 1990-05-02
DK111389A (en) 1989-10-03
FI891558A0 (en) 1989-03-31
NO891394L (en) 1989-10-03
FI891558A (en) 1989-10-03
DE58906611D1 (en) 1994-02-17
DK111389D0 (en) 1989-03-07
DE3811297A1 (en) 1989-10-12
ATE99790T1 (en) 1994-01-15
NO891394D0 (en) 1989-04-03

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