EP1643186A1 - Optical design of a reflector for reflecting light rays - Google Patents

Optical design of a reflector for reflecting light rays Download PDF

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Publication number
EP1643186A1
EP1643186A1 EP05027056A EP05027056A EP1643186A1 EP 1643186 A1 EP1643186 A1 EP 1643186A1 EP 05027056 A EP05027056 A EP 05027056A EP 05027056 A EP05027056 A EP 05027056A EP 1643186 A1 EP1643186 A1 EP 1643186A1
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Prior art keywords
facets
facet
reflector
radii
light
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EP05027056A
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German (de)
French (fr)
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EP1643186B1 (en
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Rüdiger Kittelmann
Harry Wagener
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Auer Lighting GmbH
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Schott AG
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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
    • 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
    • F21V7/04—Optical design
    • 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
    • F21V7/048—Optical design with facets structure

Definitions

  • the invention relates to the optical design of a reflector in the form of facets for reflecting light rays.
  • Such reflectors are used, for example, for lights for general lighting purposes. They have found widespread use especially in retail. But they are also used for the light supply in optical fibers, in video projectors or in headlights that produce a sharply limited light field (so-called pursuit headlights).
  • Such reflectors generally have an elliptical, parabolic or conic-like basic contour. In many cases, this basic contour is superimposed on an optical design in the form of facets in order to improve the uniformity of the light field and / or to increase the size of the light field.
  • reflectors of the type mentioned generate a circular field of light.
  • this is not always achieved.
  • the luminous bodies used are not rotationally symmetric.
  • the result is a light field that deviates from the circular shape. It may be oval or even approximately the shape of a rectangle, which is undesirable.
  • the invention has for its object to design an optical design for a reflector for reflecting light rays such that light fields can be generated arbitrarily, which are at least nearly circular or nearly rectangular, regardless of the shape of the lamp used.
  • the inventors have recognized that a given light field contour can be generated for a given shape of the luminous body solely by the choice of the shapes of individual or all facets and by the arrangement or position of such facets to the optical axis of the reflector base body.
  • the invention solves the following problems:
  • a non-rotationally symmetric luminous element is given, and one would like to produce a round light field. Or it is given a rotationally symmetrical luminous body, and you want to create a non-circular light field.
  • the facets are designed and arranged such that a rotational symmetry of the facets, based on the optical axis of the reflector base body, is largely avoided.
  • the invention can be put into practice in many ways.
  • the facets can be flat, spherical or cylindrical, for example. In the latter two cases, they may be both concave and convex.
  • the deviation from the rotational symmetry may also be that groups of facets are larger, and other groups are smaller.
  • certain facets or groups of facets extending over a certain peripheral region of the reflector base differ in shape and location from certain other facets or groups of facets extending over another peripheral region.
  • Known reflectors have facets that run in rows, which in turn are arranged in axially perpendicular planes.
  • the plan view of the hollow reflector base body-thus into it-one can divide the entire reflection surface into columns, which extend from the light exit opening of the reflector to the holder of the filament.
  • the boundary lines between adjacent columns may coincide with meridian lines. You do not have to.
  • the axes of the cylinders may be parallel to the optical axis of the reflector, but also circumferentially.
  • one area of the reflector inner surface may be formed of spherical facets, while another area may be formed of planar facets.
  • Another mating between different columns may be in concave and convex cylinders, or in large and small cylinders.
  • the facets are arranged in rows which are concentric with the x-axis.
  • the facets are arranged in columns at the same time.
  • the facets can be spherical or cylindrical.
  • the radii of the facets (that is, the radii of the balls or the cylinder) within a facet row, varies according to the size of the solid angle, under which the facet "sees" the luminous element. In the case of a large solid angle and the associated greater light scattering, a smaller curvature of the facet surface is accordingly selected, thus a larger facet radius, and vice versa.
  • the radii of the facets in two columns lying on the z-axis must be greater than the radii of the facets in the two Columns that lie on the y-axis.
  • the radii of the facets in the Intervening columns should then be chosen appropriately between these two extreme values.
  • the sector angles in the two columns lying on the z-axis must be smaller than the sector angles of the facets in the two Columns that lie on the y-axis.
  • the Sektörwinke) in between lying columns are then to choose between these two extreme values in an appropriate manner.
  • the cylinder axes can be varied relative to the common reflector.
  • the cylinder axes may, for example, run in the circumferential direction, and thus follow the course of a row, or run in the direction of the columns.
  • the entire reflector surface is divided into four equal sectors A, B, C and D, each of 90 degrees.
  • the z-axis is simultaneously the axis of symmetry of the sectors A and C
  • the y-axis is the axis of symmetry of the sectors B and D.
  • a perpendicular to the reflector periphery (FIG. or tangential) alignment of the cylinder axis of the facets selected, and for the sectors B and D to the reflector circumference tangential (or vertical) alignment depending on the desired light distribution and the desired light field, for the sectors A and C, a perpendicular to the reflector periphery (FIG. or tangential) alignment of the cylinder axis of the facets selected, and for the sectors B and D to the reflector circumference tangential (or vertical) alignment.
  • the lamp with the non-rotationally symmetrical filament can be installed in the correct angular position in the reflector. It can thus be seen in which direction the ovate Lichtfetd extends.
  • Figure 3 reveals a single series of facets. This runs spirally around the x-axis and thus around the optical axis of the reflector. The other rows are also spiral. The rows are thus not in planes that are perpendicular to the optical axis of the reflector.
  • the boundary lines between two adjacent columns are radial. However, this does not necessarily have to be this way. Rather, the boundary lines - and thus the columns themselves - may have a different course, for example, a gradient inclined towards the radial.
  • facets does not necessarily mean that they are sharply demarcated areas. Rather, the facets can also merge into each other.

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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)

Abstract

The light beam reflector has a reflection surface of facets to give a light field. A hollow body has a lamp at one end and a light outlet opening at the other end. The reflection surface, on a plan view in the hollow body, is divided into columns extending from the outlet opening to the lamp mounting, with the facets in rows with curvature radii which vary within a row to give a circular light field contour with a lamp without rotation symmetry, according to the value of the spatial angle where the facet takes up the light. At least some facets are cylindrical and at least some are spherical.

Description

Die Erfindung betrifft das optische Design eines Reflektors in Gestalt von Facetten zum Reflektieren von Lichtstrahlen. Solche Reflektoren werden beispielsweise verwendet für Leuchten für allgemeine Beleuchtungszwecke. Sie haben insbesondere im Einzelhandel große Verbreitung gefunden. Sie werden aber auch verwendet für die Lichteinspeisung in Lichtleiter, in Videoprojektoren oder in Scheinwerfern, die ein scharf begrenztes Lichtfeld erzeugen (sogenannte Verfolgungsscheinwerfer).The invention relates to the optical design of a reflector in the form of facets for reflecting light rays. Such reflectors are used, for example, for lights for general lighting purposes. They have found widespread use especially in retail. But they are also used for the light supply in optical fibers, in video projectors or in headlights that produce a sharply limited light field (so-called pursuit headlights).

Solche Reflektoren besitzen im allgemeinen eine elliptische, parabolische oder kegelschnittähnliche Grundkontur. In vielen Fällen ist dieser Grundkontur ein optisches Design in Form von Facetten überlagert, um die Gleichmäßigkeit des Lichtfeldes zu verbessern und/oder die Größe des Lichtfeldes zu erhöhen.Such reflectors generally have an elliptical, parabolic or conic-like basic contour. In many cases, this basic contour is superimposed on an optical design in the form of facets in order to improve the uniformity of the light field and / or to increase the size of the light field.

Im allgemeinen strebt man an, daß Reflektoren der genannten Art ein kreisrundes Lichtfeld erzeugen. Dies wird jedoch nicht immer erzielt. Der Grund liegt darin, daß die verwendeten Leuchtkörper nicht rotationssymmetrisch sind. Die Folge davon ist ein Lichtfeld, das von der Kreisform abweicht. Es kann oval sein oder gar annähernd die Gestalt eines Rechteckes haben, was unerwünscht ist.In general, it is sought that reflectors of the type mentioned generate a circular field of light. However, this is not always achieved. The reason is that the luminous bodies used are not rotationally symmetric. The result is a light field that deviates from the circular shape. It may be oval or even approximately the shape of a rectangle, which is undesirable.

Umgekehrt kann aber auch der Fall vorliegen, daß man gern ein von der Kreisform abweichendes Lichtfeld hätte, daß man aber aus Gründen der Herstellung oder des Einbaus nur rotationssymmetrische Leuchtkörper verwenden kann. Bei Verwendung eines solchen rotationssymmetrischen Leuchtkörpers ist somit das Erzeugen eines von der Kreisform abweichenden Lichtfeldes mit einfachen Mitteln nicht möglich.Conversely, it may also be the case that one would like to deviate from the circular shape light field, but that you can use only rotationally symmetric filament for reasons of manufacture or installation. When using such a rotationally symmetrical filament thus generating a deviating from the circular shape light field is not possible by simple means.

Der Erfindung liegt die Aufgabe zugrunde, ein optisches Design für einen Reflektor zum Reflektieren von Lichtstrahlen derart zu gestalten, daß sich Lichtfelder willkürlich erzeugen lassen, die wenigstens nahezu kreisrund oder nahezu rechteckig sind, und zwar ungeachtet der Gestalt des verwendeten Leuchtkörpers.The invention has for its object to design an optical design for a reflector for reflecting light rays such that light fields can be generated arbitrarily, which are at least nearly circular or nearly rectangular, regardless of the shape of the lamp used.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 bzw. Anspruch 13 gelöst.This object is solved by the features of claim 1 and claim 13.

Die Erfinder haben erkannt, daß eine bestimmte Lichtfeldkontur bei gegebener Gestalt des Leuchtkörpers allein durch die Wahl der Formen einzelner oder aller Facetten sowie durch die Anordnung oder Lage solcher Facetten zur optischen Achse des Reflektor-Grundkörpers erzeugbar ist.The inventors have recognized that a given light field contour can be generated for a given shape of the luminous body solely by the choice of the shapes of individual or all facets and by the arrangement or position of such facets to the optical axis of the reflector base body.

Mit der Erfindung lassen sich die folgenden Probleme lösen:The invention solves the following problems:

Entweder ist ein nicht-rotationssymmetrischer Leuchtkörper vorgegeben, und man möchte ein rundes Lichtfeld erzeugen. Oder es ist ein rotationssymmetrischer Leuchtkörper vorgegeben, und man möchte ein nichtrundes Lichtfeld erzeugen. ln beiden Fällen werden die Facetten derart gestaltet und angeordnet, daß eine Rotationssymmetrie der Facetten, bezogen auf die optische Achse des Reflektor-Grundkörpers, weitgehend vermieden wird.Either a non-rotationally symmetric luminous element is given, and one would like to produce a round light field. Or it is given a rotationally symmetrical luminous body, and you want to create a non-circular light field. In both cases, the facets are designed and arranged such that a rotational symmetry of the facets, based on the optical axis of the reflector base body, is largely avoided.

Die Erfindung läßt sich in vielfältiger Weise in die Praxis umsetzen.The invention can be put into practice in many ways.

So gibt es bezüglich der Formen der Facetten zahlreiche Möglichkeiten. Die Facetten können beispielsweise eben, kugelförmig oder zylindrisch sein. In den zwei letztgenannten Fällen können sie sowohl konkav als auch konvex sein.So there are many possibilities regarding the shapes of the facets. The facets can be flat, spherical or cylindrical, for example. In the latter two cases, they may be both concave and convex.

Die Abweichung von der Rotationssymmetrie kann auch darin liegen, daß Gruppen von Facetten größer, und andere Gruppen wiederum kleiner sind. Maßgeblich ist, daß gewisse Facetten oder Gruppen von Facetten, die sich über einen gewissen Umfangsbereich des Reflektor-Grundkörpers erstrecken, bezüglich ihrer Formen und Lagen von gewissen anderen Facetten oder Gruppen von Facetten unterscheiden, die sich über einen anderen Umfangsbereich erstrecken.The deviation from the rotational symmetry may also be that groups of facets are larger, and other groups are smaller. Significantly, certain facets or groups of facets extending over a certain peripheral region of the reflector base differ in shape and location from certain other facets or groups of facets extending over another peripheral region.

Bekannte Reflektoren weisen Facetten auf, die in Reihen verlaufen, welche ihrerseits in achssenkrechten Ebenen angeordnet sind. In der Draufsicht auf den hohlen Reftektor-Grundkörper-somit in diesen hinein - kann man die gesamte Reflexionsfläche in Spalten aufteilen, die sich von der Lichtaustrittsöffnung des Reflektors zur Fassung des Leuchtkörpers hin erstrecken. Die Grenzlinien zwischen einander benachbarten Spalten können mit Meridianlinien zusammenfallen. Sie müssen es aber nicht.Known reflectors have facets that run in rows, which in turn are arranged in axially perpendicular planes. In the plan view of the hollow reflector base body-thus into it-one can divide the entire reflection surface into columns, which extend from the light exit opening of the reflector to the holder of the filament. The boundary lines between adjacent columns may coincide with meridian lines. You do not have to.

Desgleichen müssen die genannten Reihen nicht unbedingt in achssenkrechten Ebenen verlaufen. Sie könnten sich auch spiralig um die optische Achse des Reflektors herumwinden.Likewise, these series do not necessarily have to run in the axial plane. You could also spiral around the optical axis of the reflector.

Von den zahlreichen Arten, eine Rotations-Asymmetrie vorzusehen, ist noch die folgende Möglichkeit zu erwähnen: Handelt es sich um Facetten von zylindrischer Form, so können die Achsen der Zylinder parallel zur optischen Achse des Reflektors verlaufen, aber auch in Umfangsrichtung.Of the many ways of providing rotational asymmetry, the following is also worth mentioning: if the facets are of cylindrical shape, the axes of the cylinders may be parallel to the optical axis of the reflector, but also circumferentially.

Eine weitere Möglichkeit besteht darin, ungleiche Formen miteinander zu paaren. So kann beispielsweise ein Bereich der Reflektor-Innenfläche aus kugeligen Facetten gebildet sein, während ein anderer Bereich aus ebenen Facetten gebildet ist. Eine weitere Paarung zwischen verschiedenen Spalten kann in konkaven und konvexen Zylindern bestehen, oder in großen und kleinen Zylindern.Another possibility is to mate unequal shapes. For example, one area of the reflector inner surface may be formed of spherical facets, while another area may be formed of planar facets. Another mating between different columns may be in concave and convex cylinders, or in large and small cylinders.

Die Erfindung ist anhand der Zeichnungen näher erläutert. Darin ist im einzelnen folgendes dargestellt:

Figur 1
zeigt eine Draufsicht auf einen facettierten Reflektor mit 24 Spalten und 9 Reihen.
Figur 2
zeigt wiederum eine Draufsicht auf einen facettierten Reflektor mit vier Gruppen von Facetten.
Figur 3
zeigt eine Draufsicht auf einen abgewickelten, facettierten Reflektor, bei dem nur eine einzige Reihe dargestellt ist.
Figur 4
zeigt eine Draufsicht auf einen Reflektor mit gegeneinander versetzten Facettenreihen.
The invention is explained in more detail with reference to the drawings. The following is shown in detail:
FIG. 1
shows a plan view of a faceted reflector with 24 columns and 9 rows.
FIG. 2
again shows a plan view of a faceted reflector with four groups of facets.
FIG. 3
shows a plan view of a developed, faceted reflector, in which only a single row is shown.
FIG. 4
shows a plan view of a reflector with staggered facet rows.

Bei dem in Figur 1 gezeigten Reflektor sind die Facetten in Reihen angeordnet, die zur x-Achse konzentrisch verlaufen. Die Facetten sind gleichzeitig in Spalten angeordnet. Die Facetten können kugelförmig oder zylindrisch sein.In the reflector shown in Figure 1, the facets are arranged in rows which are concentric with the x-axis. The facets are arranged in columns at the same time. The facets can be spherical or cylindrical.

Dabei werden die Radien der Facetten (das heißt die Radien der Kugeln oder der Zylinder) innerhalb einer Facettenreihe, variiert entsprechend der Größe des Raumwinkels, unter dem die Facette den Leuchtkörper "sieht". Bei großem Raumwinkel und damit verbundener größerer Lichtstreuung wird dem gemäß eine kleinere Krümmung der Facettenfläche gewählt, somit ein größerer Facettenradius, und umgekehrt. Sind beispielsweise die Abmessungen des Leuchtkörpers in Richtung der y-Achse größer, als in Richtung der z-Achse, so müssen die Radien der Facetten in zwei Spalten, die auf der z-Achse liegen, größer sein als die Radien der Facetten in den beiden Spalten, die auf der y-Achse liegen. Die Radien der Facetten in den dazwischen liegenden Spalten sind dann in geeigneter Weise zwischen diesen beiden Extremwerten zu wählen.The radii of the facets (that is, the radii of the balls or the cylinder) within a facet row, varies according to the size of the solid angle, under which the facet "sees" the luminous element. In the case of a large solid angle and the associated greater light scattering, a smaller curvature of the facet surface is accordingly selected, thus a larger facet radius, and vice versa. For example, if the dimensions of the filament in the direction of the y-axis are greater than in the direction of the z-axis, the radii of the facets in two columns lying on the z-axis must be greater than the radii of the facets in the two Columns that lie on the y-axis. The radii of the facets in the Intervening columns should then be chosen appropriately between these two extreme values.

In der Praxis hat sich dabei folgende cosinusförmige Beziehung als sehr geeignet erwiesen: R r , s = R z − R y 2 ⋅ cos ( 4 π s C r ) + R z + R y 2

Figure imgb0001
In practice, the following cosinusoidal relationship has proved to be very suitable: R r . s = R z - R y 2 ⋅ cos ( 4 π s C r ) + R z + R y 2
Figure imgb0001

Es können jedoch auch andere periodische Beziehungen mit gleicher Periode gewählt werden, z.B.: R r , s = ( R z − R y ) ⋅ ( cos 2 ( 2 π s C r ) − 1 2 ) + R z + R y 2

Figure imgb0002
However, other periodic relationships with the same period can be selected, eg: R r . s = ( R z - R y ) ⋅ ( cos 2 ( 2 π s C r ) - 1 2 ) + R z + R y 2
Figure imgb0002

Einen ähnlichen Effekt erhält man, wenn nicht der Radius der Facette innerhalb einer Reihe variiert wird, sondern der Winkel, über den sich eine Spalte von Facetten erstreckt. Dieses Prinzip läßt sich nicht nur auf kugelförmige oder zylindrische Facetten, sondern auch auf ebene Facetten anwenden. Es werden die Sektorwinkel von kugeligen oder zylindrischen oder ebenen Facetten innerhalb einer Facettenreihe entsprechend der Größe des Raumwinkels variiert, unter dem die Facette den Leuchtkörper "sieht". Bei großem Raumwinkel und dem gemäß größerer Lichtstreuung wählt man einen kleineren Sektorwinkel, und umgekehrt. Sind zum Beispiel die Abmessungen des Leuchtkörpers in Richtung der y-Achse größer, als in Richtung der z-Achse, so müssen die Sektorwinkel in den beiden Spalten, die auf der z-Achse liegen, kleiner sein als die Sektorwinkel der Facetten in den beiden Spalten, die auf der y-Achse liegen. Die Sektörwinke) in den dazwischen liegenden Spalten sind dann in geeigneter Weise zwischen diesen beiden Extremwerten zu wählen.A similar effect is obtained if the radius of the facet within a row is not varied, but the angle over which a column of facets extends. This principle can be applied not only to spherical or cylindrical facets, but also to planar facets. The sector angles of spherical or cylindrical or planar facets within a facet row are varied according to the size of the solid angle at which the facet "sees" the luminous element. With a large solid angle and the greater light scattering one chooses a smaller sector angle, and vice versa. For example, if the dimensions of the filament are greater in the y-axis direction than in the z-axis direction, the sector angles in the two columns lying on the z-axis must be smaller than the sector angles of the facets in the two Columns that lie on the y-axis. The Sektörwinke) in between lying columns are then to choose between these two extreme values in an appropriate manner.

In der Praxis hat sich dabei folgende cosinusförmige Beziehung als sehr geeignet erwiesen: σ r , s = σ z − σ y 2 ⋅ cos ( 4 π s C r ) + σ z + σ y 2

Figure imgb0003
In practice, the following cosinusoidal relationship has proved to be very suitable: σ r . s = σ z - σ y 2 ⋅ cos ( 4 π s C r ) + σ z + σ y 2
Figure imgb0003

Es können jedoch auch andere periodische Beziehungen mit gleicher Periode gewählt werden, z.B.: σ r , s = ( σ z − σ y ) ⋅ ( cos 2 ( 2 π s C r ) − 1 2 ) + σ z + σ y 2

Figure imgb0004
However, other periodic relationships with the same period can be selected, eg: σ r . s = ( σ z - σ y ) ⋅ ( cos 2 ( 2 π s C r ) - 1 2 ) + σ z + σ y 2
Figure imgb0004

Handelt es sich um zylindrische Facetten, so können die Zylinderachsen relativ zum gesamen Reflektor variiert werden. Die Zylinderachsen können beispielsweise in Umfangsrichtung verlaufen, und somit dem Verlauf einer Reihe folgen, oder in Richtung der Spalten verlaufen.When dealing with cylindrical facets, the cylinder axes can be varied relative to the common reflector. The cylinder axes may, for example, run in the circumferential direction, and thus follow the course of a row, or run in the direction of the columns.

Bei der Ausführungsform gemäß Figur 2 ist die gesamte Reflektorfläche in vier gleiche Sektoren A, B, C und D von jeweils 90 Grad aufgeteilt. Die z-Achse ist dabei gleichzeitig Symmetrieachse der Sektoren A und C, und die y-Achse ist gleichzeitig Symmetrieachse der Sektoren B und D. Je nach der gewünschten Lichtverteilung und dem gewünschten Lichtfeld wird dann für die Sektoren A und C eine zum Reflektorumfang senkrechte (bzw. tangentiale) Ausrichtung der Zylinderachse der Facetten gewählt, und für die Sektoren B und D eine zum Reflektorumfang tangentiale (bzw. senkrechte) Ausrichtung.In the embodiment according to FIG. 2, the entire reflector surface is divided into four equal sectors A, B, C and D, each of 90 degrees. The z-axis is simultaneously the axis of symmetry of the sectors A and C, and the y-axis is the axis of symmetry of the sectors B and D. At the same time, depending on the desired light distribution and the desired light field, for the sectors A and C, a perpendicular to the reflector periphery (FIG. or tangential) alignment of the cylinder axis of the facets selected, and for the sectors B and D to the reflector circumference tangential (or vertical) alignment.

Damit der gewünschte Effekt erreicht wird, solite in geeigneter Weise eine Marke am Reflektor angebracht werden. Hierdurch läßt sich die Lampe mit dem nicht-rotationssymmetrischen Leuchtkörper in der richtigen Winkelposition in den Reflektor einbauen. Es läßt sich damit erkennen, in welche Richtung sich das ovate Lichtfetd erstreckt.In order to achieve the desired effect, a mark should be suitably applied to the reflector. As a result, the lamp with the non-rotationally symmetrical filament can be installed in the correct angular position in the reflector. It can thus be seen in which direction the ovate Lichtfetd extends.

Figur 3 läßt eine einzige Reihe von Facetten erkennen. Diese verläuft spiralig um die x-Achse und damit um die optische Achse des Reflektors. Die anderen Reihen verlaufen ebenfalls spiralig. Die Reihen liegen somit nicht in Ebenen, die senkrecht zur optischen Achse des Reflektors verlaufen.Figure 3 reveals a single series of facets. This runs spirally around the x-axis and thus around the optical axis of the reflector. The other rows are also spiral. The rows are thus not in planes that are perpendicular to the optical axis of the reflector.

In den Figuren 1 und 2 verlaufen die Grenzlinien zwischen zwei einander benachbarten Spalten radial. Dies muß jedoch nicht unbedingt so sein. Vielmehr können auch die Grenzlinien - und damit die Spalten selbst - einen anderen Verlauf haben, beispielsweise einen gegen die Radiale geneigten Verlauf.In FIGS. 1 and 2, the boundary lines between two adjacent columns are radial. However, this does not necessarily have to be this way. Rather, the boundary lines - and thus the columns themselves - may have a different course, for example, a gradient inclined towards the radial.

Die Ausdrucksweise "Facetten" bedeutet nicht unbedingt, daß es sich um scharf gegeneinander abgegrenzte Flächen handelt. Vielmehr können die Facetten auch stetig ineinander übergehen.The term "facets" does not necessarily mean that they are sharply demarcated areas. Rather, the facets can also merge into each other.

Wenn von "Reihen" und "Spalten" die Rede ist, so bedeutet dies ebenfalls nicht zwingend eine strenge Abgrenzung zwischen einzelnen Reihen und einzelnen Spalten. Vielmehr ist auch hier ein stetiger Übergang zwischen einander benachbarten Reihen bzw. einander benachbarten Spalten möglich. Es handelt sich somit in einem solchen Falle nur um ideelle Reihen und ideelle Spalten.Also, when referring to "rows" and "columns," this does not necessarily mean a strict demarcation between individual rows and individual columns. Rather, a continuous transition between adjacent rows or adjacent columns is also possible here. In such a case, therefore, it is only an ideological series and ideal columns.

Claims (8)

Reflektor
mit einem hohlen Grundkörper, der ein erstes Ende zum Aufnehmen eines Leuchtkörpers aufweist, sowie ein zweites Ende, das eine Lichtaustrittsöffnung darstellt,
einer Facetten aufweisende Reflexionsfläche zum Reflektieren von Lichtstrahlen und zum Erzeugen eines Lichtfeldes, wobei
die Reflexionsfläche in der Draufsicht auf den hohlen Reflektor-Grundkörper in Spalten aufgeteilt ist, die sich von der Lichtaustrittsöffnung zur Fassung des Leuchtkörpers hin erstrecken und die Facetten in Reihen verlaufen,
dadurch gekennzeichnet, dass
die Krümmungsradien der Facetten innerhalb einer Facettenreihe variieren, derart, dass für einen nicht-rotationssymmetrischen Leuchtkörper eine nahezu kreisrunde Lichtfeldkontur erzeugt wird und die Krümmungsradien der Facetten innerhalb einer Facettenreihe variieren, entsprechend der Größe des Raumwinkels unter dem die Facette Licht des Leuchtkörpers aufnimmt.reflector
a hollow base body having a first end for receiving a luminous body and a second end representing a light exit opening,
a faceted reflective surface for reflecting light rays and for generating a light field, wherein
the reflection surface is divided in the plan view of the hollow reflector base body in columns, which extend from the light exit opening to the socket of the filament and the facets run in rows,
characterized in that
the radii of curvature of the facets within a facet row vary such that for a non-rotationally symmetric luminescent body a nearly circular light field contour is generated and the radii of curvature of the facets vary within a facet row corresponding to the size of the solid angle under which the facet receives light from the luminescent body. Reflektor gemäß Anspruch 1, dadurch gekennzeichnet, dass
der Reflektor eine optische Achse aufweist.Reflector according to claim 1, characterized in that
the reflector has an optical axis. Reflektor nach einem der Ansprüche 1 bis 2 dadurch gekennzeichnet, dass wenigstens einige Facetten Zylinderflächen sind.Reflector according to one of claims 1 to 2, characterized in that at least some facets are cylindrical surfaces . Reflektor nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass wenigstens einige Facetten sphärische Flächen sind.Reflector according to one of claims 1 to 2, characterized in that at least some facets are spherical surfaces. Reflektor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Leuchtkörper eine erste Abmessung in einer ersten Richtung aufweist und eine zweite Abmessung in einer zweiten Richtung, wobei die erste Abmessung in der ersten Richtung größer als die zweite Abmessung in der zweiten Richtung ist und wobei die Radien der Facetten, die in einer Facettenreihe der Facettenspalte liegen, die sich in Richtung der ersten Richtung des Leuchtkörpers erstrecken, einen Minimalwert annehmen und die Radien der Facetten, die in einer Facettenspalte liegen, die sich in Richtung der zweiten Richtung des Leuchtkörpers erstrecken, einen Maximalwert annehmen und die Radien der Facetten, die in einer Facettenreihe in Facettenspalten, die sich in einer Richtung, die zwischen der ersten und der zweiten Richtung liegen, erstrecken, Radien aufweisen, die zwischen dem Minimal- und dem Maximalwert liegen.Reflector according to one of claims 1 to 4, characterized in that the luminous body has a first dimension in a first direction and a second dimension in a second direction, wherein the first dimension in the first direction is greater than the second dimension in the first direction second direction and wherein the radii of the facets lying in a facet row of the facet gaps extending in the direction of the first direction of the luminous body assume a minimum value and the radii of the facets lying in a facet column extending in the direction of the second Extend the direction of the filament, take a maximum value and the radii of the facets, which in a facet row in facet columns that extend in a direction that lie between the first and the second direction, have radii that are between the minimum and the maximum value lie. Reflektor nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass
die Radien der Facetten innerhalb einer Facettenreihe variieren entsprechend der Größe des Raumwinkels, unter dem die Facette Licht des Leuchtkörpers aufnimmt und für die Radien gilt R r , s = R z − R y 2 ⋅ cos ( 4 π s C r ) + R z + R y 2 .
Figure imgb0005
oder eine andere periodische Funktion mit gleicher Periode ist, wobei
Rr,s den Radius in der jeweiligen Reihe r in der jeweiligen Spalte s bezeichnet,
Rz der Radius der Facette ist, die in der Spalte liegt, die sich entlang der z-Achse erstreckt,
Ry der Radius der Facette ist, die in der Spalte liegt, die sich entlang der y-Achse erstreckt und
Cr die Gesamtzahl der Spalten einer Reihe ist.Reflector according to one of claims 1 to 5,
characterized in that
the radii of the facets within a facet series vary according to the size of the solid angle at which the facet receives light from the luminous element and applies to the radii R r . s = R z - R y 2 ⋅ cos ( 4 π s C r ) + R z + R y 2 ,
Figure imgb0005
or another periodic function having the same period, wherein
R r, s denotes the radius in the respective row r in the respective column s,
R z is the radius of the facet lying in the column extending along the z-axis,
Ry is the radius of the facet that lies in the column that extends along the y-axis and
C r is the total number of columns in a row. Leuchte für allgemeine Beleuchtungszwecke
umfassend
einen Leuchtkörper sowie
einen Reflektor gemäß einem der Ansprüche 1 bis 6.Luminaire for general lighting purposes
full
a luminous element as well
a reflector according to one of claims 1 to 6. Verwendung eines Reflektors gemäß einem der Ansprüche 1 bis 6 - für die Lichteinspeisung in Lichtleiter - in Videoprojektoren - in Scheinwerfern, die ein scharf begrenztes Lichtfeld erzeugen - in Leuchten für allgemeine Beleuchtungszwecke. Use of a reflector according to one of claims 1 to 6 - for the light feed in optical fibers - in video projectors - in headlamps that produce a sharply delimited light field - in lighting fixtures for general lighting purposes.
EP05027056A 1999-03-09 2000-01-17 Optical design of a reflector for reflecting light rays Revoked EP1643186B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19910192A DE19910192C2 (en) 1999-03-09 1999-03-09 Reflector with a concave, rotationally symmetrical body and a faceted reflection surface
EP00100805A EP1035370B1 (en) 1999-03-09 2000-01-17 Optical design of a reflector for reflecting light rays

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EP1643186B1 EP1643186B1 (en) 2008-04-16

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JP (1) JP2000275414A (en)
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Also Published As

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EP1035370A2 (en) 2000-09-13
DE50011880D1 (en) 2006-01-26
EP1035370B1 (en) 2005-12-21
DE50015114D1 (en) 2008-05-29
ATE392583T1 (en) 2008-05-15
ATE313759T1 (en) 2006-01-15
EP1643186B1 (en) 2008-04-16
US6361175B1 (en) 2002-03-26
DE19910192C2 (en) 2002-04-04
JP2000275414A (en) 2000-10-06
EP1035370A3 (en) 2001-10-31
DE19910192A1 (en) 2000-09-21

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