EP0085336B1 - Reflector for a street lamp - Google Patents
Reflector for a street lamp Download PDFInfo
- Publication number
- EP0085336B1 EP0085336B1 EP83100353A EP83100353A EP0085336B1 EP 0085336 B1 EP0085336 B1 EP 0085336B1 EP 83100353 A EP83100353 A EP 83100353A EP 83100353 A EP83100353 A EP 83100353A EP 0085336 B1 EP0085336 B1 EP 0085336B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- plane
- reference plane
- reflecting zone
- zone
- 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
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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
Definitions
- the invention relates to a reflector for a street lamp according to the preamble of claim 1.
- Such a reflector is known from FIGS. 7 and 8 of US Pat. No. 2,612,600 and provides an approximately elliptical Isolux diagram (lines of the same illuminance on the street), which is more suitable for illuminating streets than a circular Isolux diagram.
- Such reflectors are used almost exclusively today for illuminating residential streets and pedestrian zones and are arranged at a relatively low height on the street side. For aesthetic reasons, relatively small dimensions are required, which, however, make it very difficult to optimize the lighting technology. This is especially true when lamps with a clogged bulb, i.e. a large luminous surface, are to be used. Under these conditions, the asymmetrical isolux curve mentioned at the outset is difficult to achieve, especially if an additional light band kink, i.e. an asymmetry with respect to the longitudinal axis, is required: Only with such a light band kink can the luminous flux of the luminaires placed on the side move away from the house walls towards the middle of the street to steer.
- the invention is therefore based on the object of developing a reflector according to the preamble of claim 1 in such a way that, given predetermined maximum dimensions in conjunction with a lamp with a clogged bulb, an isolux diagram is obtained which is symmetrical only with respect to an axis running transversely to the longitudinal direction of the street, with additionally the Possibilities of a simple and precise production must be taken into account.
- the reflector in the invention consists only of rotating surfaces, the matrix core required for production can be easily produced despite high accuracy, which at the same time ensures cheap and exact series production.
- the lateral mirror zones are also shaped and arranged substantially differently, which is also expressed in particular in the acute angles of incidence of the cutting planes, based on the transverse plane.
- the associated inclination of the inner parts of the lateral mirror zones means that the majority of the light rays falling on them leave the reflector without multiple reflections.
- the inner sections of the lateral mirror zones radiate upwards into the reflector in the known case.
- the hood-shaped reflector consists of two mirror-image identical parts, which are arranged symmetrically to the main plane H and meet there in a limit curve KO (see FIG. 4); Therefore, only the right half of the two halves is described in more detail below:
- This consists of three bowl-shaped mirror zones 1, 2 and 3, each of which is the surface of rotation of a generatrix E with a radius of rotation r in the reference plane B about an axis of rotation M perpendicular to this reference plane .
- the generator E1 of the central mirror zone 1 can be seen from the section in FIG. 3: It is a parabola in the lower third with a focal length of 0.524 based on the maximum diameter D of the reflector and a main axis angle ⁇ 1 relative to the reference plane B of 25 °.
- the associated radius of rotation r1 is related to the axis of rotation M1 with the coordinates x1 and y1, which are calculated from the zero point 0 of a coordinate system.
- This coordinate system lies in the reference plane B, which is also the light exit plane; its zero point is determined by the intersection between the main plane H and a transverse plane Q running perpendicular thereto, which is also the longitudinal axis of the lamp L assigned to the reflector, which is a high-pressure mercury vapor lamp with a clogged bulb and the maximum diameter d. From Fig. 2 it can also be seen that this lamp is immersed in the reflector to such an extent that the center of the burner b lies in the reference plane B.
- the lateral mirror zone 2 has a generating line E2 shown in FIG. 5, which has a parabola in the lower third with the focal length 0.524 related to the maximum diameter D of the reflector and a main axis angle ⁇ 2 of 12.5 °, with respect to the reference plane B; the associated radius of rotation r2 and the axis of rotation M2 with the associated coordinates are indicated in FIG. 1.
- the cutting plane S2 is also entered there between this lateral mirror zone and the central mirror zone 1; it has an angle of attack a2 against the X axis of 36 °.
- the corresponding angle of incidence a3 of the sectional plane S3 between the central mirror zone 1 and the lateral mirror zone 3 with the larger rotation radius r3 is, however, negative and has a value of 45 °.
- the surfaces of rotation of the three mirror zones each meet in a common limit curve K2 and K3, the course of which can be seen in FIGS. 2 and 3 - albeit distorted by the projection.
- the lateral mirror zone 3 has a generating line E3 shown in FIG. 6, which in the lower third is a parabola with the focal length based on the maximum diameter D of the reflector 0.755 mm and a main axis angle ⁇ 3 of 2 °, based on the reference plane B; the associated radius of rotation r3 and the axis of rotation M3 with the associated coordinates are indicated in FIG. 1.
- the values given in the claims apply to the length dimensions, the maximum diameter D of the refracting gate shown in FIG. 1 in the reference plane B having a value of 220 mm and being assigned to an 80 HQL lamp with a maximum diameter d of 70 mm .
- the isolux curve that can be achieved in this case is shown schematically in FIG. 1 and designated J.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
- Aerials With Secondary Devices (AREA)
- Road Signs Or Road Markings (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
Die Erfindung betrifft einen Reflektor für eine Strassenleuchte gemäss Oberbegriff von Anspruch 1.The invention relates to a reflector for a street lamp according to the preamble of
Ein derartiger Reflektor ist aus den Fig. 7 und 8 der US-PS Nr. 2612600 bekannt und liefert ein etwa ellipsenförmiges Isoluxdiagramm (Linien gleicher Beleuchtungsstärke auf der Strasse), das zur Ausleuchtung von Strassen besser geeignet ist als ein kreisförmiges Isoluxdiagramm.Such a reflector is known from FIGS. 7 and 8 of US Pat. No. 2,612,600 and provides an approximately elliptical Isolux diagram (lines of the same illuminance on the street), which is more suitable for illuminating streets than a circular Isolux diagram.
Derartige Reflektoren werden heute fast ausschliesslich zur Ausleuchtung von Wohnstrassen und Fussgängerzonen verwendet und hierbei in relativ geringer Höhe an der Strassenseite angeordnet. Aus ästhetischen Gründen werden hierbei verhältnismässig kleine Abmessungen gefordert, die jedoch eine lichttechnische Optimierung sehr erschweren. Das gilt insbesondere, wenn Lampen mit beschlämmtem Kolben, also grosser leuchtender Oberfläche, verwendet werden sollen. Unter diesen Voraussetzungen istdie eingangs erwähnte asymmetrische Isoluxkurve schwierig zu realisieren, insbesondere wenn noch zusätzlich eine Lichtbandknickung, also eine Unsymmetrie bezüglich der Längsachse, gefordert ist: Nur durch eine solche Lichtbandknickung lässt sich nämlich der Lichtstrom der seitlich aufgestellten Leuchten von den Hauswänden weg zur Strassenmitte hin lenken.Such reflectors are used almost exclusively today for illuminating residential streets and pedestrian zones and are arranged at a relatively low height on the street side. For aesthetic reasons, relatively small dimensions are required, which, however, make it very difficult to optimize the lighting technology. This is especially true when lamps with a clogged bulb, i.e. a large luminous surface, are to be used. Under these conditions, the asymmetrical isolux curve mentioned at the outset is difficult to achieve, especially if an additional light band kink, i.e. an asymmetry with respect to the longitudinal axis, is required: Only with such a light band kink can the luminous flux of the luminaires placed on the side move away from the house walls towards the middle of the street to steer.
Bei dem bekannten Reflektor wird von einem zunächst rotationssymmetrischen Glaskörper ausgegangen, der nach Erwärmung auf zwei gegenüberliegenden Seiten zur Erzeugung der seitlichen Spiegelzonen eingedrückt wird. Dieses Verfahren ist jedoch zur Massenherstellung nicht geeignet, wenn bestimmte lichttechnische Forderungen mit hoher Genauigkeit erfüllt werden sollen. Hierzu ist es erforderlich, das Reflektormaterial in an sich bekannter Weise um eine entsprechend geformte Kernmatrix zu drücken oder zu giessen. Die Herstellung einer solchen Kernmatrix für einen haubenförmigen asymmetrischen Reflektor ist jedoch äusserst schwierig und aufwendig.In the known reflector, an initially rotationally symmetrical glass body is assumed, which after heating is pressed in on two opposite sides to produce the lateral mirror zones. However, this method is not suitable for mass production if certain lighting requirements are to be met with high accuracy. For this purpose, it is necessary to press or cast the reflector material around a correspondingly shaped core matrix in a manner known per se. However, the production of such a core matrix for a dome-shaped asymmetrical reflector is extremely difficult and complex.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Reflektor gemäss Oberbegriff von Anspruch 1 so weiterzubilden, dass man bei vorgegebenen Maximalabmessungen in Verbindung mit einer Lampe mit beschlämmten Kolben ein lsoluxdiagramm erhält, das nur bezüglich einer quer zur Strassenlängsrichtung verlaufenden Achse symmetrisch ist, wobei zusätzlich den Möglichkeiten einer einfachen und genauen Fertigung Rechnung zu tragen ist.The invention is therefore based on the object of developing a reflector according to the preamble of
Eine Lösung dieser Aufgabe stellt der in Anspruch 1 gekennzeichnete Reflektor dar.A solution to this problem is the reflector characterized in
Da der Reflektor bei der Erfindung nur aus Rotationsflächen beseht, lässt sich der zur Herstellung erforderliche Matrixkern trotz hoher Genauigkeit einfach herstellen, womit zugleich eine billige und exakte Serienfertigung gewährleistet ist.Since the reflector in the invention consists only of rotating surfaces, the matrix core required for production can be easily produced despite high accuracy, which at the same time ensures cheap and exact series production.
Bei der Erfindung sind auch die seitlichen Spiegelzonen wesentlich anders geformt und angeordnet, was vor allem auch in den spitzen Anstellwinkeln der Schnittebenen, bezogen auf die Querebene, zum Ausdruck kommt. Die damit verbundene Neigung der inneren Teile der seitlichen Spiegelzonen hat zur Folge, dass der grösste Teil der auf sie fallenden Lichtstrahlen ohne Mehrfachreflexion den Reflektor verlässt. Im Gegensatz dazu strahlen die inneren Abschnitte der seitlichen Spiegelzonen im bekannten Fall nach oben in den Reflektor hinein.In the case of the invention, the lateral mirror zones are also shaped and arranged substantially differently, which is also expressed in particular in the acute angles of incidence of the cutting planes, based on the transverse plane. The associated inclination of the inner parts of the lateral mirror zones means that the majority of the light rays falling on them leave the reflector without multiple reflections. In contrast, the inner sections of the lateral mirror zones radiate upwards into the reflector in the known case.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the subclaims.
Ein Ausführungsbeispiel der Erfindung wird anhand der Figuren näher erläutert; es zeigen:
- Fig. 1 eine Ansicht des Reflektors von oben (in der Bezugsebene B),
- Fig. 2 einen Schnitt entlang Linie 11-11 in Fig. 1,
- Fig. 3 einen Schnittentlang Linie 111-111 in Fig. 1,
- Fig. 4 einen Schnitt entlang Linie IV-IV in Fig. 1,
- Fig. 5 einen Schnitt durch die eine seitliche Spiegelzone 2 entlang Linie V-V in Fig. 1, und
- Fig. 6 einen Schnitt durch die andere
seitliche Spiegelzone 3 entlang Linie VI-VI in Fig. 1.
- 1 is a view of the reflector from above (in the reference plane B),
- 2 shows a section along line 11-11 in FIG. 1,
- 3 shows a section along line 111-111 in FIG. 1,
- 4 shows a section along line IV-IV in FIG. 1,
- 5 shows a section through the one lateral mirror zone 2 along line VV in FIG. 1, and
- 6 shows a section through the other
lateral mirror zone 3 along line VI-VI in FIG. 1.
Der haubenförmige Reflektor besteht aus zwei spiegelbildlich gleichen Teilen, die symmetrisch zur Hauptebene H angeordnet sind und dort in einer Grenzkurve KO (vgl. Fig. 4) aneinanderstossen; es wird daher im folgenden nur die rechte der beiden Hälften näher beschrieben: Diese besteht aus drei schalenförmigen Spiegelzonen 1,2 und 3, die jeweils Rotationsflächen einer Erzeugende E mit einem Rotationsradius r in der Bezugsebene B um eine auf dieser Bezugsebene senkrecht stehenden Rotationsachse M sind.The hood-shaped reflector consists of two mirror-image identical parts, which are arranged symmetrically to the main plane H and meet there in a limit curve KO (see FIG. 4); Therefore, only the right half of the two halves is described in more detail below: This consists of three bowl-
Die Erzeugende E1 der mittleren Spiegelzone 1 ist aus dem Schnitt in Fig. 3 ersichtlich: Sie ist im unteren Drittel eine Parabel mit einer auf den maximalen Durchmesser D des Reflektors bezogenen Brennweite von 0,524 und einem Hauptachswinkel ß1 bezogen auf die Bezugsebene B von 25°. Der zugehörige Rotationsradius r1 ist auf die Rotationsachse M1 mit den Koordinaten x1 und y1 bezogen, die vom Nullpunkt 0 eines Koordinatensystems gerechnet sind. Dieses Koordinatensystem liegt in der Bezugsebene B, die zugleich die Lichtaustrittsebene ist; sein Nullpunkt ist bestimmt durch die Schnittlinie zwischen der Hauptebene H und einer dazu senkrecht verlaufenden Querebene Q, die zugleich die Längsachse der dem Reflektor zugeordneten Lampe L ist, bei der es sich um eine Quecksilberdampf-Hochdrucklampe mit beschlämmten Kolben und dem maximalen Durchmesser d handelt. Aus Fig. 2 ist auch ersichtlich, dass diese Lampe soweit in den Reflektor eintaucht, dass der Mittelpunkt des Brenners b in der Bezugsebene B liegt.The generator E1 of the
Aus Fig.1 istersichtlich, dass nicht nurdieseitlichen Spiegelzonen 2 und 3 sondern auch die mittlere Spiegelzone 1 zur Querebene Q asymmetrisch liegen; wichtig ist dabei vor allem, dass die Y-Koordinate Y1 der Rotationsachse M1 negativ ist.From FIG. 1 it is evident that not only
Die seitliche Spiegelzone 2 hat eine in Fig. 5 dargestellte Erzeugende E2, die im unteren Drittel eine Parabel mit der auf den maximalen Durchmesser D des Reflektors bezogenen Brennweite 0,524 und einem Hauptachswinkel β2 von 12,5°, bezogen auf die Bezugsebene B, ist; der zugehörige Rotationsradius r2 und die Rotationsachse M2 mit den zugehörigen Koordinaten sind in Fig. 1 angegeben. Dort ist auch die Schnittebene S2 zwischen dieser seitlichen Spiegelzone und der mittleren Spiegelzone 1 eingetragen; sie hat einen Anstellwinkel a2 gegen die X-Achse von 36°. Der entsprechende Anstellwinkel a3 der Schnittebene S3 zwischen der mittleren Spiegelzone 1 und der seitlichen Spiegelzone 3 mit dem grösseren Rotationsradius r3 ist dagegen negativ und hat einen Wert von 45°. In den Schnittebenen S2 und S3 stossen die Rotationsflächen der drei Spiegelzonen jeweils in einer gemeinsamen Grenzkurve K2 bzw. K3 zusammen, deren Verlauf in den Fig. 2 und 3 - allerdings durch die Projektion verzerrt - zu sehen ist.The lateral mirror zone 2 has a generating line E2 shown in FIG. 5, which has a parabola in the lower third with the focal length 0.524 related to the maximum diameter D of the reflector and a main axis angle β2 of 12.5 °, with respect to the reference plane B; the associated radius of rotation r2 and the axis of rotation M2 with the associated coordinates are indicated in FIG. 1. The cutting plane S2 is also entered there between this lateral mirror zone and the
Die seitliche Spiegelzone 3 hat eine in Fig. 6 dargestellte Erzeugende E3, die im unteren Drittel eine Parabel mit der auf den maximalen Durchmesser D des Reflektors bezogenen Brennweite 0,755 mm und einen Hauptachswinkel ß3 von 2°, bezogen auf die Bezugsebene B, ist; der zugehörige Rotationsradius r3 und die Rotationsachse M3 mit den zugehörigen Koordinaten sind in Fig. 1 angegeben.The
Für die Längenabmessungen gelten die in den Ansprüchen angegebenen Werte, wobei der in Fig. 1 eingezeichnete maximale Durchmesser D des Refkeltors in der Bezugsebene B einen Wert von 220 mm hat und einer 80-HQL-Lampe mit einem maximalen Durchmesser d von 70 mm zugeordnet ist.The values given in the claims apply to the length dimensions, the maximum diameter D of the refracting gate shown in FIG. 1 in the reference plane B having a value of 220 mm and being assigned to an 80 HQL lamp with a maximum diameter d of 70 mm .
Die hierbei erzielbare Isoluxkurve ist schematisch in Fig. 1 angegeben und mit J bezeichnet.The isolux curve that can be achieved in this case is shown schematically in FIG. 1 and designated J.
Claims (10)
- 2. A reflector as claimed in Claim 1, characterised in that the maximal vertex (h) above the reference plane (B), related to the maximal diameter (D) of the reflector in the reference plane (B), amounts to 0.54 ±10%.
- 4. A reflector as claimed in Claim 3, characterised in that the setting angle (a2) between the transverse plane (Q) and the intersection plane (S2) between the central reflecting zone (1) and the lateral reflecting zone (2) with the smaller rotational radius (r2) amounts to 36°±10%, and the setting angle (a) of the intersection plane (S3) between the central reflecting zone (1) and the lateral reflecting zone (3) with the larger rotational radius (r3) amounts to 45°±10%.
- 5. A reflector as claimed in Claim 4, characterised in that in the third adjacent to the reference plane (B) the generatrix (E1) of the central reflecting zone is a parabola which has a focal length of 0.524 relative to the maximal diameter of the reflector and whose main axis together with the reference plane (B) forms a main axis angle (p1) of 25°.
- 6. A reflector as claimed in Claim 4, characterised in that in the third adjacent to the reference plane (B), the generatrix (E2) of the lateral reflecting zone (2) with the smaller rotational radius (r2) is a parabola which has a focal length of 0.524 relative to the maximal diameter of the reflector and which has a main axis angle (p2) relative to the reference plane (B) of 12.5°.
- 7. A reflector as claimed in Claim 4, characterised in that in the third adjacent to the reference plane (B) the generatrix (E3) of the lateral reflecting zone (3) is a parabola which has a focal length of 0.755 relative to the maximal diameter of the reflector and which has a main axis angle (ß3) relative to the reference plane (B) of 2°.
- 8. A reflector as claimed in one of Claims 1 to 7, characterised in that the reference plane (B) simultaneously constitutes the light outlet plane which is determined by the edge of the reflector.
- 9. An exterior lamp having a reflector as claimed in Claim 8, characterised by a lamp with ellipsoid bulbs and a maximal diameter (d) of between 55 and 75 mm.
- 10. An exterior lamp as claimed in Claim 9, characterised in that half of the burner of the lamp lies in the reflector above the light outlet plane.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3203221 | 1982-02-01 | ||
DE3203221A DE3203221C1 (en) | 1982-02-01 | 1982-02-01 | Reflector for a street lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0085336A1 EP0085336A1 (en) | 1983-08-10 |
EP0085336B1 true EP0085336B1 (en) | 1984-12-27 |
Family
ID=6154448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83100353A Expired EP0085336B1 (en) | 1982-02-01 | 1983-01-17 | Reflector for a street lamp |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0085336B1 (en) |
AT (1) | ATE10970T1 (en) |
DE (1) | DE3203221C1 (en) |
DK (1) | DK150033C (en) |
GR (1) | GR77390B (en) |
NO (1) | NO159819C (en) |
ZA (1) | ZA83630B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2766555B1 (en) * | 1997-07-24 | 1999-10-15 | Eclairage Tech Eclatec Sa L | REFLECTOR FOR EXTERIOR LIGHTING DEVICE |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE314396C (en) * | ||||
US2612600A (en) * | 1947-08-12 | 1952-09-30 | Joslyn Mfg And Supply Company | Open type luminaire with easily removable reflector |
DE2655631C3 (en) * | 1976-12-08 | 1980-09-18 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Warehouse light |
-
1982
- 1982-02-01 DE DE3203221A patent/DE3203221C1/en not_active Expired
- 1982-12-10 NO NO824158A patent/NO159819C/en unknown
-
1983
- 1983-01-17 EP EP83100353A patent/EP0085336B1/en not_active Expired
- 1983-01-17 AT AT83100353T patent/ATE10970T1/en not_active IP Right Cessation
- 1983-01-28 GR GR70335A patent/GR77390B/el unknown
- 1983-01-31 ZA ZA83630A patent/ZA83630B/en unknown
- 1983-01-31 DK DK35883A patent/DK150033C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO824158L (en) | 1983-08-02 |
DE3203221C1 (en) | 1983-06-09 |
DK35883D0 (en) | 1983-01-31 |
ATE10970T1 (en) | 1985-01-15 |
EP0085336A1 (en) | 1983-08-10 |
ZA83630B (en) | 1983-10-26 |
DK150033C (en) | 1987-05-11 |
DK150033B (en) | 1986-11-24 |
NO159819C (en) | 1989-02-08 |
NO159819B (en) | 1988-10-31 |
GR77390B (en) | 1984-09-11 |
DK35883A (en) | 1983-08-02 |
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