EP0881425B1 - Lamp - Google Patents
Lamp Download PDFInfo
- Publication number
- EP0881425B1 EP0881425B1 EP98109485A EP98109485A EP0881425B1 EP 0881425 B1 EP0881425 B1 EP 0881425B1 EP 98109485 A EP98109485 A EP 98109485A EP 98109485 A EP98109485 A EP 98109485A EP 0881425 B1 EP0881425 B1 EP 0881425B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- facets
- convergent
- divergent
- light according
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- 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
- F21V7/0066—Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
Definitions
- the invention relates to a lamp with a light source and a reflector at least one convergent and at least one divergent reflector section having.
- Such a reflector is known for example from DE 87 03 494 U. If overlap the areas illuminated by the individual reflector sections, can compensate for inaccuracies of the reflector and thus the Production tolerances are increased.
- the object of the invention is to create a new type of lamp which is used in a excellent light distribution has a visually appealing appearance and has relatively large fault tolerances in manufacture.
- this is achieved in a luminaire of the type mentioned at the outset by that the convergent reflector section is essentially surface-covering with a Faceting is provided and the adjoining the faceted reflector section divergent reflector section has a smooth inner surface, so that the Transition point from the convergent to the divergent reflector section in the essentially with the transition point from the faceted to the smooth inner Surface collapses.
- the change between the faceted and the smooth So surface essentially runs on the border between the two Reflector sections.
- the lamp has two Reflector sections, of which the inner, the light source adjacent Reflector section is convergent and faceted and the adjoining outside Reflector section is divergent and smooth.
- the preferred embodiment shown in FIGS. 1 and 2 reflector according to the invention has an inner, the light source 1 adjacent convergent reflector section 2 and then a divergent outside Reflector section 3.
- the reflector is made in one piece and the two Reflector sections 2, 3 are continuous and kink-free in the transition region 8 connected.
- the term convergent reflector section means that two Rays 4, 5 converging on adjacent points of a cross-sectional line Hit reflector section 2, intersect in the further beam path. rays that point to adjacent points of a cross-sectional line of the divergent On the other hand, the reflector section 3 strikes run in the further beam path apart.
- the angle of the beam changes in the transition region 8 between the two sections 2, 3 not.
- the angle of reflection of the most divergent Reflector section 3 reflected rays 9-14 decrease from the inside to the outside, so that the angle of reflection ⁇ of the outermost beam 14 is again approximately 0 °.
- the area illuminated by the luminaire is therefore used by both Reflector sections 2, 3 fully illuminated, the im Transition area 8 between the two reflector sections 2, 3 reflected Rays lie just on the outer edge of the illuminated area.
- the reflector section 2 has facets 15 provided while the reflector section 3 is smooth, i.e. is unfacetted.
- the facets 15 of section 2 can be designed as cylinder, torus or spherical surfaces and be concave, convex or mixed concave / convex.
- the arrangement of the facets can be plaster-shaped (with spherical facets), or the facets can according to the embodiment shown along radial lines 16 of the Be arranged reflector.
- the facets are designed such that a parallel beam for example expanded to 2x15 °.
- the optimal degree of expansion is from depending on the shape of the total reflector and is usually between 2x10 ° and 2x40 ° between 2x15 ° and 2x30 °.
- the beam expansion caused by the faceting 15 causes the Structure of light source 1 is not imaged on the surface illuminated by the lamp becomes. Such an image could be by the reflector section 3 alone are caused, the superposition with the light from the reflector section 2 but causes that altogether no or hardly such an annoying image from Viewer can be perceived. Since the faceting 15 just at the Border between the two reflector sections 2, 3 ends, the from Edge area of the faceting 15 reflected rays straight to the edge of the pictured illuminated area. Any the edge area of the faceting touch any another location of the reflector, this edge area would be within the Illuminated area are mapped and become perceptible and distracting Discontinuities in illuminance result. At the edge of the illuminated On the other hand, such discontinuities do not disturb the surface, since there is a discontinuity in anyway Form of a change between light and dark.
- the reflector surface for both the faceted and the smooth area is preferably specular or high-gloss, for example in the form of shiny or anodized aluminum.
- the reflector according to the invention makes it uniform To achieve light distribution with relatively large manufacturing tolerances, further from Avoid facets of local glare and optically special to provide an attractive reflector.
- a reflector according to the invention can also have more than two reflector sections have, the total area illuminated by the lamp several times can be illuminated so that there are deviations from the optimal light distribution find out even better. At least one of the sections is faceted and at least one of the sections is smooth, alternating between faceted and smooth in the border area between a converged and a diverged section of the reflector.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Die Erfindung betrifft eine Leuchte mit einer Lichtquelle und einem Reflektor, der zumindest einen konvergenten und zumindest einen divergenten Reflektorabschnitt aufweist.The invention relates to a lamp with a light source and a reflector at least one convergent and at least one divergent reflector section having.
Ein solcher Reflektor ist beispielsweise aus der DE 87 03 494 U bekannt. Wenn sich die von den einzelnen Reflektorabschnitten beleuchteten Flächen überschneiden, können dadurch Ungenauigkeiten des Reflektors ausgeglichen werden und damit die Produktionstoleranzen erhöht werden.Such a reflector is known for example from DE 87 03 494 U. If overlap the areas illuminated by the individual reflector sections, can compensate for inaccuracies of the reflector and thus the Production tolerances are increased.
Aus der US 3,401,258 ist es bekannt, Reflektoroberflächen mit einer Facettierung zu
versehen. Auf diese Weise wird insbesondere eine unerwünschte Abbildung der
Struktur der Lichtquelle auf die zu beleuchtenden Fläche vermieden. Eine Leuchte mit
einem flächendeckend mit einer Facettierung versehenen Reflektorabschnitt geht aus
der GB 2 123 942 A hervor. Durch diese Maßnahme werden Ungenauigkeiten des
Reflektors ausgeglichen und damit die Produktionstoleranzen erhöht. Eine facettierte
Reflektoroberfläche hat aber den Nachteil, daß sie aufgrund der Facetten in ihrem
Erscheinungsbild auf den Betrachter unruhig und somit optisch weniger ansprechend
wirkt. Weiters kann es durch Reflexion an den Facetten auch außerhalb des
eigentlichen Beleuchtungswinkels der Leuchte zu lokalen Blendungen kommen.From US 3,401,258 it is known to provide reflector surfaces with a facet
Mistake. In this way, an undesired image of the
Structure of the light source avoided on the surface to be illuminated. A lamp with
a surface covering with a faceting reflector section goes out
Aufgabe der Erfindung ist die Schaffung einer neuartigen Leuchte, welche bei einer hervorragenden Lichtverteilung ein optisch ansprechendes Erscheinungsbild besitzt und bei der Herstellung relativ große Fehlertoleranzen aufweist.The object of the invention is to create a new type of lamp which is used in a excellent light distribution has a visually appealing appearance and has relatively large fault tolerances in manufacture.
Erfindungsgemäß gelingt dies bei einer Leuchte der eingangs genannten Art dadurch, daß der konvergente Reflektorabschnitt im wesentlichen flächendeckend mit einer Facettierung versehen ist und der an den facettierten Reflektorabschnitt anschließende divergente Reflektorabschnitt eine glatte innere Oberfläche aufweist, sodaß die Übergangsstelle vom konvergenten zum divergenten Reflektorabschnitt im wesentlichen mit der Übergangsstelle von der facettierten zur glatten inneren Oberfläche zusammenfällt. Der Wechsel zwischen der facettierten und der glatten Oberfläche verläuft also im wesentlichen an der Grenze zwischen den beiden Reflektorabschnitten. According to the invention, this is achieved in a luminaire of the type mentioned at the outset by that the convergent reflector section is essentially surface-covering with a Faceting is provided and the adjoining the faceted reflector section divergent reflector section has a smooth inner surface, so that the Transition point from the convergent to the divergent reflector section in the essentially with the transition point from the faceted to the smooth inner Surface collapses. The change between the faceted and the smooth So surface essentially runs on the border between the two Reflector sections.
Auf diese Weise können, wie in der anschließenden Figurenbeschreibung noch genauer ausgeführt wird, eine gleichmäßige Lichtverteilung und ein ansprechendes Äußeres realisiert werden. Weiters ist eine derartige Leuchte in der Herstellung relativ unaufwendig.In this way, as in the subsequent description of the figures is carried out more precisely, a uniform light distribution and an appealing Exterior can be realized. Furthermore, such a luminaire is relative to manufacture inexpensive.
In einem bevorzugten Ausführungsbeispiel der Erfindung weist die Leuchte zwei Reflektorabschnitte auf, von denen der innere, der Lichtquelle benachbarte Reflektorabschnitt konvergent und facettiert ist und der außen anschließende Reflektorabschnitt divergent und glatt ist.In a preferred embodiment of the invention, the lamp has two Reflector sections, of which the inner, the light source adjacent Reflector section is convergent and faceted and the adjoining outside Reflector section is divergent and smooth.
Weitere Vorteile und Einzelheiten der Erfindung werden im folgenden anhand der beiliegenden Zeichnung erläutert.Further advantages and details of the invention are described below with reference to the attached drawing explained.
In dieser zeigt
Das in den Fig. 1 und 2 dargestellte bevorzugte Ausführungsbeispiel eines
erfindungsgemäßen Reflektors weist einen inneren, der Lichtquelle 1 benachbarten
konvergenten Reflektorabschnitt 2 und außen anschließend einen divergenten
Reflektorabschnitt 3 auf. Der Reflektor ist einstückig ausgebildet und die beiden
Reflektorabschnitte 2, 3 sind im Übergangsbereich 8 stetig und knickfrei miteinander
verbunden. Die Bezeichnung konvergenter Reflektorabschnitt bedeutet, daß zwei
Strahlen 4, 5, die auf benachbarte Punkte einer Querschnittslinie des konvergenten
Reflektorabschnitts 2 auftreffen, sich im weiteren Strahlenverlauf schneiden. Strahlen,
die auf benachbarte Punkte einer Querschnittslinie des divergenten
Reflektorabschnitts 3 auftreffen, laufen dagegen im weiteren Strahlenverlauf
auseinander.The preferred embodiment shown in FIGS. 1 and 2
reflector according to the invention has an inner, the light source 1 adjacent
Wenn man die am konvergenten Reflektorabschnitt 2 reflektierten Strahlen betrachtet,
sieht man, daß deren Ausfallswinkel von den weiter innen reflektierten Strahlen zu den
weiter außen reflektierten Strahlen zunimmt, und zwar von γ = 0° des Strahls 6 bis zum
maximalen Aufallswinkel γmax des im Bereich 8 der Grenze zwischen den beiden
Reflektorabschnitten 2, 3 reflektierten Strahls 7.If one looks at the rays reflected at the
Da der Übergang zwischen den beiden Reflektorabschnitten 2, 3 stetig und knickfrei
ist, ändert sich der Ausfallswinkel der Strahlen im Übergangsbereich 8 zwischen den
beiden Abschnitten 2, 3 nicht. Die Ausfallswinkel der am divergenten
Reflektorabschnitt 3 reflektierten Strahlen 9-14 nehmen von innen nach außen ab,
sodaß der Ausfallswinkel γ des äußersten Strahls 14 wieder annähernd 0° beträgt. Die
von der Leuchte insgesamt beleuchtete Fläche wird somit von beiden
Reflektorabschnitten 2, 3 jeweils vollständig ausgeleuchtet, wobei die im
Übergangsbereich 8 zwischen den beiden Reflektorabschnitten 2, 3 reflektierten
Strahlen gerade am äußeren Rand der beleuchteten Fläche liegen.Since the transition between the two
Wie aus der Fig. 1 und 2 ersichtlich, ist der Reflektorabschnitt 2 mit Facetten 15
versehen, während der Reflektorabschnitt 3 glatt, d.h. unfacettiert ist. Die Facetten 15
des Abschnitts 2 können als Zylinder-, Torus- oder Kugelfächen ausgebildet sein und
dabei konkav, konvex oder gemischt konkav/konvex sein. Die Anordnung der Facetten
kann dabei pflasterförmig sein (bei Kugelfacetten), oder die Facetten können
entsprechend dem gezeigten Ausführungsbeispiel entlang radialer Linien 16 des
Reflektors angeordnet sein. Die Facetten sind derart ausgebildet, daß ein Parallelstrahl
beispielsweise auf 2x15° aufgeweitet wird. Der optimale Grad der Aufweitung ist von
der Form des Gesamtreflektors abhängig und liegt zwischen 2x10° und 2x40°, meist
zwischen 2x15° und 2x30°.As can be seen from FIGS. 1 and 2, the
Die durch die Facettierung 15 hervorgerufene Strahlaufweitung bewirkt, daß die
Struktur der Lichtquelle 1 nicht auf die von der Leuchte beleuchtete Fläche abgebildet
wird. Eine solche Abbildung könnte zwar durch den Reflektorabschnitt 3 allein
hervorgerufen werden, die Überlagerung mit dem Licht aus dem Reflektorabschnitt 2
bewirkt aber, daß insgesamt keine oder kaum eine solche störende Abbildung vom
Betrachter wahrgenommen werden kann. Da die Facettierung 15 gerade an der
Grenze zwischen den beiden Reflektorabschnitten 2, 3 endet, werden die vom
Randbereich der Facettierung 15 reflektierten Strahlen gerade an den Rand der
beleuchteten Fläche abgebildet. Würde der Randbereich der Facettierung an irgend
einer anderen Stelle des Reflektors liegen, so würde dieser Randbereich innerhalb der
beleuchteten Fläche abgebildet werden und dort zu wahrnehmbaren und störenden
Diskontinuitäten in der Beleuchtungsstärke führen. Am Randbereich der beleuchteten
Fläche stören solche Diskontinuitäten dagegen nicht, da ohnehin eine Diskontinuität in
Form eines Wechsels zwischen hell und dunkel vorliegt.The beam expansion caused by the faceting 15 causes the
Structure of light source 1 is not imaged on the surface illuminated by the lamp
becomes. Such an image could be by the
Die Reflektorfläche sowohl für den facettierten wie auch für den glatten Bereich wird vorzugsweise spiegelnd bzw. hochglänzend, beispielsweise in Form von geglänztem oder eloxiertem Aluminium ausgebildet.The reflector surface for both the faceted and the smooth area is preferably specular or high-gloss, for example in the form of shiny or anodized aluminum.
Da nur der innere Bereich 2 des Reflektors mit Facettierungen versehen ist, können
diese Facettierungen 15 nur in einem Winkelbereich α unterhalb der Leuchte gesehen
werden. Seitlich außerhalb dieses Bereiches ist nur ein Teil der glatten inneren
Oberfläche des Reflektorabschnittes 3 einsehbar, wodurch die Leuchte optisch
ansprechender wirkt. Ein weiterer Vorteil der erfindungsgemäßen Leuchte liegt darin,
daß außerhalb des Winkelbereiches α eine lokale Blendung aufgrund von an den
Facetten reflektierte Strahlen vermieden wird.Since only the
Durch den erfindungsgemäßen Reflektor gelingt es insgesamt eine gleichmäßige Lichtverteilung bei relativ großen Herstellungstoleranzen zu erzielen, weiters von Facetten herrührende lokale Blendungen zu vermeiden und einen optisch besonders ansprechenden Reflektor bereitzustellen.Overall, the reflector according to the invention makes it uniform To achieve light distribution with relatively large manufacturing tolerances, further from Avoid facets of local glare and optically special to provide an attractive reflector.
Ein erfindungsgemäßer Reflektor kann auch mehr als zwei Reflektorabschnitte aufweisen, wobei die von der Leuchte insgesamt beleuchtete Fläche mehrfach beleuchtet sein kann, sodaß sich Abweichungen von der optimalen Lichtverteilung noch besser herausmitteln. Zumindest einer der Abschnitte ist dabei facettiert und zumindest einer der Abschnitte ist glatt, wobei der Wechsel zwischen facettiert und glatt im Grenzbereich zwischen einem konvergierten und einem divergierten Abschnitt des Reflektors liegt.A reflector according to the invention can also have more than two reflector sections have, the total area illuminated by the lamp several times can be illuminated so that there are deviations from the optimal light distribution find out even better. At least one of the sections is faceted and at least one of the sections is smooth, alternating between faceted and smooth in the border area between a converged and a diverged section of the reflector.
Claims (7)
- A light comprising a light source and a dish-shaped, rotationally symmetrical reflector which, in a plane which includes the axis of rotation of the reflector, has an inner convergent reflector portion and an outer divergent reflector portion adjoining the inner reflector portion, characterised in that the convergent reflector portion (2) is provided with facetting (15) substantially covering its surface and the divergent reflector portion (3) adjoining the facetted reflector portion (2) has a smooth inner surface so that the transition (8) from the convergent to the divergent reflector portion (2, 3) substantially coincides with the transition (8) from the facetted to the smooth inner surface.
- A light according to claim 1 characterised in that the facets (15) are of such a shape that the enlargement of a parallel beam is between 2 x 10° and 2 x 40°, preferably between 2 x 15° and 2 x 30°.
- A light according to claim 2 characterised in that the facets (15) are in the shape of cylindrical, toric or spherical surfaces.
- A light according to one of claims 1 to 3 characterised in that the facets (15) are arranged along radial lines (16) of the reflector.
- A light according to one of claims 1 to 4 characterised in that the facets (15) are arranged in a cobbles form.
- A light according to one of claims 1 to 6 characterised in that the surfaces illuminated by the individual reflector portions (2, 3) substantially coincide.
- A light according to one of claims 1 to 6 characterised in that the light source (1) is a substantially punctiform light source (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89197 | 1997-05-26 | ||
AT89197 | 1997-05-26 | ||
AT891/97 | 1997-05-26 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0881425A2 EP0881425A2 (en) | 1998-12-02 |
EP0881425A3 EP0881425A3 (en) | 2000-02-23 |
EP0881425B1 true EP0881425B1 (en) | 2003-03-19 |
Family
ID=3502218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98109485A Expired - Lifetime EP0881425B1 (en) | 1997-05-26 | 1998-05-26 | Lamp |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0881425B1 (en) |
AT (1) | ATE235020T1 (en) |
DE (1) | DE59807513D1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9903182D0 (en) * | 1999-02-13 | 1999-04-07 | Abacus Holdings Ltd | Improved reflector |
DE19910192C2 (en) * | 1999-03-09 | 2002-04-04 | Schott Auer Gmbh | Reflector with a concave, rotationally symmetrical body and a faceted reflection surface |
DE10018831B4 (en) * | 2000-04-15 | 2004-05-19 | Markus Korsch | reflector assembly |
DE102004058750A1 (en) * | 2004-12-06 | 2006-06-08 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Single ended high pressure discharge lamp |
DE102013221163A1 (en) * | 2013-10-18 | 2015-04-23 | Zumtobel Lighting Gmbh | Optical system for an LED light source and luminaire with such an optical system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3401258A (en) * | 1966-10-17 | 1968-09-10 | Edwin F Guth Company | Luminaire reflector |
US4453203A (en) * | 1982-07-19 | 1984-06-05 | Harvey Hubbell Incorporated | Lighting fixture reflector |
AT386671B (en) * | 1986-03-24 | 1988-09-26 | Zumtobel Ag | LAMP WITH A LAMP AND WITH A REFLECTOR |
DE4237192A1 (en) * | 1992-11-04 | 1994-05-05 | Hoffmeister Leuchten Kg | Electric lighting fitting with composite reflector for illumination control - has opposite facing sides of concave reflector formed respectively as concentric steps and smooth cone for additive reduced glare flux control. |
-
1998
- 1998-05-26 EP EP98109485A patent/EP0881425B1/en not_active Expired - Lifetime
- 1998-05-26 AT AT98109485T patent/ATE235020T1/en active
- 1998-05-26 DE DE59807513T patent/DE59807513D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59807513D1 (en) | 2003-04-24 |
ATE235020T1 (en) | 2003-04-15 |
EP0881425A2 (en) | 1998-12-02 |
EP0881425A3 (en) | 2000-02-23 |
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