WO2008028517A1

WO2008028517A1 - Lamp with deflection device

Info

Publication number: WO2008028517A1
Application number: PCT/EP2006/066151
Authority: WO
Inventors: Hans-Joachim Schmidt
Original assignee: Osram Gesellschaft mit beschränkter Haftung
Priority date: 2006-09-07
Filing date: 2006-09-07
Publication date: 2008-03-13

Abstract

Disclosed is a lamp with a light source which radiates in a directed manner and a beam deflection device, wherein the relative arrangement between light source and beam deflection device is effected in a manner such that the light emitted by the light source in a directed manner is reflected by the beam deflection device substantially without direct impingement onto the light source.

Description

description

Luminaire with deflection

Technical area

The invention relates to a luminaire with directed strah ^¬ lender light source and a deflection.

State of the art

In general lighting, light sources with a cone-shaped radiation characteristic are used to highlight individual room zones or individual objects or groups of objects by means of increased brightness. By the heat generated from the objects an improved shadow dreidi ^¬ dimensional perception enables the viewer, at which deep shadows can distort the shape of the illuminated object, however. Even light reflections on shiny surfaces can disturb the spatial perception of an object if the intensity is too high. For optimal lighting design, therefore, not only the metering of light quantity and bundling, but also a possibility for enlarging the luminous surface is desirable for manipulating shadows and light reflections. In the usual in general lighting reflector lamps and light emitting diodes such influencing possibilities, however, are given only within narrow limits.

Therefore, in a photo studio, the objects are usually illuminated by reflecting surfaces of different size and texture and directed to these reflection surfaces light sources. This prevents the image from being disturbed by intense light reflections and deep shadows. First, when a diffuse reflec ^¬-saving surface is irradiated with the light source, admittedly a gleichmä ^¬ ssige lighting in a large solid angle is obtained, but a precise alignment of the light source and surface is necessary for this purpose and the housing of the light source itself casts a shadow, so that the efficiency and the uniformity of the illumination are reduced in this type of lighting.

In the published patent application DE 197 07 795 A1 a housing is provided with a hollow cylindrical shape, wherein the lateral surface of the housing is provided with a slit-shaped opening which extends parallel to the housing axis over the entire length of the housing, and wherein the opening opposite Half of the housing is closed and the light sources are arranged inside the housing. This results in a voluminous light whose emission characteristics can be changed only to a small extent.

Presentation of the invention

The invention has for its object to provide a lamp with which a precise influence of the radiation characteristic at a high efficiency in terms of the emitted light is possible.

This object is achieved by the features of claim 1.

The lamp according to the invention has a directed beam ^¬ de light source and a beam deflection device, on which the light source is provided in such a manner that the directed from the light source emitted light is reflected by the beam deflecting what essentially without a subsequent re-impact on the light source takes place .. In this way, a high efficiency can be achieved with accurate influence on the Ab- beam characteristic.

It is preferred that the light source is fixed to a Randab ^{¬ section of} the beam deflection, whereby the shading of the radiation coming from the deflecting device can be prevented by the light source itself ..

According to a preferred embodiment, the beam deflection device is a concave mirror, which enables the bundling or scattering of the light directed onto the beam deflection device.

According to a preferred embodiment, the beam deflecting device has a curvature in at least one plane, so that e.g. a bundling in the vertical direction and a scatter in the horizontal direction is possible.

For the purpose of bundling the curvature of the beam deflecting device is preferably designed in such a manner that the light source of an Pa ^¬ rabelsegmentes is in focus without vertex. The resulting beam path substantially corresponds to a reversal of the operating principle of an offset parabolic antenna for the reception of the satellite television.

For the purpose of scattering, the curvature of the beam deflecting device preferably follows the course of an ellipse in the region of the semi-minor axis, which results in an elbow. - A -

lipsoidförmig domed calotte as a spatial form he gives ^¬ . The light source is arranged in one of the two focal points.

If a curved beam deflection with respect to the light source is provided reversible, it can be with the same structural elements each have a converging or scattering and alternatively achieve a very strong diverging light ^¬ distribution.

When using a plane mirror for the beam deflection device, the radiation of the light source can be redirected and scattered in a targeted manner

An inventive planar mirror may have at the opposite sides of different strongly light-scattering surfaces, so that the plane mirror on the lamp, depending on the orientation of different Ab are ^¬ beam characteristics realized.

The light source preferably comprises a device for Bün ^¬ bundling of the radiation to the beam deflection.

Preferably, these are an integrated forward direction for focusing the radiation to by the thus possible reduction of the size and complexity of the arrangement can use this as simple and compact construction ^¬ s.

The light source may for example consist of a reflector lamp with a tungsten halogen lamp or metal halide lamp as a burner, a halogen incandescent lamp with integrated ^¬ tem reflector or a light emitting diode with integrated or lens-fitted. In another variant the light source of Ge ^¬ is separated components for generating and focusing the light radiation. Although this increases the cost of the device, the lower cost of lamp replacement but allows a long-term economic operation. Reflectors and lenses are considered as components for the bundling.

The light source can be designed for continuous operation or consist of a flash lamp.

The light source and the beam deflection device are preferably connected to one another via a connecting arm, which allows a simple mechanical construction.

Further, it is preferable that the lamp is rotatably tigungsarm a Befes- and / or pivotable and / or displaceable mounted so that the lamp can be arranged at any desired position ei ^¬ ner in Raun.

Particularly advantageous embodiments of the invention are described in the dependent claims.

Brief description of the drawings

The invention will be explained in more detail below with reference to preferred exemplary embodiments. Show it:

1 shows a luminaire according to a first and second embodiment of the invention, 2 shows a lamp according to a first and second embodiment of the invention with ^{eingage ¬} ner dimensioning,

3 shows a luminaire according to a first exemplary embodiment of the invention with a schematically registered beam path and a dashed line of a continuation of the reflector contour,

Fig. 4 shows a lamp according to a second Ausführungsbei ^¬ play of the invention with a schematically registered beam path and in dashed lines continuation of the reflector contour,

Fig. 5 shows a lamp according to a third Ausführungsbei ^¬ game of the invention and

6 shows a luminaire according to a fourth embodiment of the invention.

Preferred embodiment of the invention

The luminaire according to the invention will now be described with reference to the first embodiment shown in FIG. This lamp 1 has a light head 2, a deflection ^¬ mirror 4 and a connecting arm 6.

In the light head 2, a light beam emitting ^¬ the light source 8 is housed. The light head 2 is designed substantially cylindrical and has on its side facing the deflection mirror 4 side an opening 10 with a diameter d, from which the light generated by the light source 8 exits the light head 2. At the opposite end to the opening 10 is a the Light head unilaterally closing bottom portion 12 is formed. The light head 2 is preferably made of extruded aluminum, but may also consist of any other material, such as stainless steel, eg V2A, or other types of steel. The light source 8 is introduced into the optical head 2 and the abge ^¬ radiated from the light head light beam is limited by the inner periphery of the Publ ^¬ voltage 10th Thus, the light head 8 has a glare function, ie, the function of preventing a direct view of the light source 8.

The light head 2 further serves both the support and power supply and the heat dissipation with respect to the light source 8. In addition, the light head 2 forms ei ^¬ NEN contact protection with respect to the surface of the light source. 8

The present invention is not limited to a becherarti ^¬ ge embodiment of the lamp unit 2, but may be any shape of the light head, such as the cone shape are present, provided that at least one surface of the light head has Entblendungsfunktion.

As the light source 8, any lamp, preferably a reflector lamp, or light-emitting diodes, preferably directionally emitting light-emitting diodes, are used. With regard to compact dimensions of the luminaire 1, a halogen incandescent lamp with integrated reflector is preferred, as e.g. as a halogen bulb 12V 50W, which is marketed by OSRAM under the name MINISTAR.

The necessary for the operation of the light source 2 Be ^¬ driveable devices can be provided either in the lighthead or outside of the light head. In the light head 2 is preferably a einzi ^¬ ge light source and it is preferably used a light head per lamp. However, the present invention is not limited thereto, but there may be two or more light sources in one light head, and two or more light heads may be provided on one light.

When using multiple light sources 8 in a light head 2 or more light heads 2 per light same or different types of light sources can be used.

The deflection mirror shown in Fig. 3 4 of the first exporting ^¬ approximately example is a concave ellipsoidal mirror with, for example circular outline. The light source 2 is preferably angeord ^¬ net in relation to the deflection mirror 4, that the light center S is located in one of the ^Brenn¬ points of the ellipsoid. In this way, the rays emanating from the light centroid are reflected by the other focus and there is a widening of the beam.

The deflecting mirror 4 shown in FIG. 4 of the second ^exemplary embodiment is, for example, a circular section of a parabolic mirror.

The surface of the deflection mirror 4 is formed in such a way that the apex of the paraboloid

(Point A in Fig. 4) is not included. Thus, the

Deflection mirror 4 in an eccentric manner, i. of his

Rand illuminated. Due to the eccentric arrangement of the optical head 2 in relation to the deflection mirror 4 is obtained for all From ^¬ exemplary embodiments that no light is radiated back from the reflecting mirror 4 in an undesirable manner on the light head. 2

Due to the eccentric arrangement of the light head 2 in relation to the deflection mirror 4 results for all Aus ^¬ exemplary embodiments further that the deflection mirror appears as a uniformly illuminated surface, resulting in a particularly uniform illumination and homoge ^¬ ne light reflections on the illuminated object.

The dimensioning and alignment of the deflection mirror 4 to the light center S are preferably selected so that the light emitted by the light source 2 completely occurs on the deflection mirror 4, but does not extend beyond the outer periphery of the deflection mirror 4. This fact ^¬ behavior is illustrated with the opening angle α of the light cone compared to the outer contour of the deflection mirror 4 in Fig. 2.

For the case of a single MINISTAR lamp as a light ^¬ source 8, this results in, for example, that the plane defined by the deflection mirror 4 solid angle with its top in the filament center, ie in the light center S, at least one cone having an opening angle α of 90 ° correspond to got to .

By the offset arrangement of the optical head 2 in the behaves ^¬ nis the deflection mirror 4, and by the above Dimension ^¬ dimensioning and alignment of the deflection mirror 4 is a high lighting efficiency of the arrangement achievable.

Since in the inventive design to the required with conventional reflectors hole for implementing the light source and a covering cap to Un ^¬ suppression of free broadcasting can be dispensed with, the lighting efficiency even for these reasons is high.

The deflecting mirror 4 can have any desired outline provided that the minimum dimensions predetermined by the light cone of the light source 2 are maintained. However, a circular or elliptical outline is preferred. Alternatively, for example, an outline composed of conic sections can be used.

In the first and second embodiments, the Kon ^{¬ structure} for the bulge of the deflection mirror 4 can be approximated by a circular arc, for example, to facilitate the Fer ^¬ tion. In particular, circular arcs with different radii can be used in the horizontal and vertical directions.

The deflecting mirror 4 can be provided on its side facing the light source 2 ^¬ with a pattern, with a label or with a pictorial representation. These can serve, for example, for advertising purposes. By compared to its environment greatly increased brightness of the deflection mirror 4 increased to ^¬ attention is made for the force applied to the steering mirror To ^¬ 4 design. The surface of the deflection mirror 4 is designed so that no specular, but a predominantly court ^¬ te reflection arises. In this case, a substantially uniform illumination can be achieved by the superposed scattered portion. The deflection mirror 4 can ^¬ example, of opaque material or, for example, be configured as a cold light reflector ^¬ of partially transparent material. By the latter material certain wavelengths are filtered out. The deflecting mirror 4 can selectively reflect in the visible radiation range as well as spectrally, ie it can produce colored light.

For example, plastic, glass or anodized aluminum are used as the material of the deflecting mirror 4.

While in integral with halogen lamps reflectors ^¬ factors present in the prior art for thermal reasons, a number of restrictions regarding the choice of materials, can be prepared by the spatial separation of the bundling-reflector in the form of 2 integrated reflector in the light source and the deflection reflector in the form of of the deflection mirror 4, the material technical requirements for the deflection mirror with greater independence from the physical requirements in the operation of the light source 2 choose.

The deflecting mirror 4 does not necessarily have to have a pronounced heat resistance. The material and the surface condition of the deflection mirror 4 can therefore be selected on the basis of cost, design options or other requirements. For example, can be for the deflection mirror. 4 a cold light reflector even when using a halogen incandescent lamp with integrated reflector as a light source such as the MINISTAR, use, which was previously not possible in the art.

The lamp 1 according to the invention according to the second embodiment has a pronounced asymmetry of the radiation, which is very advantageous for the uniform illumination of a surface from a small distance. This allows the luminaire according to the invention to be used, for as a "wallwasher" or for lighting large work tables from low height. As a result of this asymmetrical light intensity distribution, the above-described prevention of the return of the light reflected by the deflecting mirror 4 to the light source is also made possible.

For the connection between light head 2 and deflecting mirror 4, a connecting arm 6, preferably in the form of a hollow profile, for example in tubular form, is used. The connecting arm 6 is for example made of extruded aluminum, stainless steel, such as V2A, or another type of steel. By the connecting arm 6 of the light head 2 with the deflecting mirror 4 is rigidly connected to provide a fixed orientation of the light cone on the deflection mirror 4. In an alternative, the angle of rotation of the light head 2 with respect to the deflection mirror 4 is adjustable, so that the illumination by the lamp with the same arrangement of the connecting arm 3 is changeable. For this purpose, the outer contour of the deflecting mirror 4 must be greater than the opening angle α. The connection between the connecting arm 6 and the deflection mirror 4 is preferably designed so that the order ^¬ steering mirror 4 is easy to replace and remove. In this way, different deflection mirrors can be used with different emission characteristics in the luminaire 1.

The connecting arm 6 should preferably be changeable in its length. Characterized deflecting mirror 4 can be used in various sizes, also falls without light radiation over the edge of the mirror or the mirror through the optical head 2 is not fully ^¬ lights and is therefore used only partially.

The lamp is mounted on the connecting arm 6 on a mounting arm 14. The attachment arm 14 is made of, for example, extruded aluminum, stainless steel, e.g. V2A, or another type of steel. In this case, the connecting arm 6 can be arranged rotatably and / or displaceably and / or pivotably on the fastening arm 14 so that different surfaces can be illuminated by the luminaire according to the invention.

For the power supply of the light source 8, a not shown in Fig. 1 may be through a cable adjacent to the link arm 6 ^¬ surface of the optical head 2 through the link arm 6 and continued through the bracket fourteenth As a result, the power supply does not disturb the visual appearance of the lamp according to the invention.

Alternatively, the cable for the power supply of the light source 8 outside the light head 2 and / or the connecting arm 6 and the mounting arm 14 run. The luminaire according to the invention can be ^displayed in any size while maintaining the proportions. In particular, the ent ^¬ speaking parts of offset receiving antennas for satellite television can be used for the components 4, 6 and 14, when the component 4 receives a directionally light-reflecting surface.

Are described below referring to Fig. 1 From ^¬ typical measurements for an inventive light, the game as used in ^¬ a halogen incandescent lamp with an integrated reflector MINISTAR indicated.

The distance a between the light center S and the edge of the deflection mirror 4 is 25mm, the diameter d of the light head at its outlet opening is 25mm, the length 1 of the light head is 50mm, the diameter of the deflection mirror 4 is 200mm and the opening angle α of the cone of light is 90 °. With such Ges ^¬ taltung the luminaire is a large area with ho ^¬ ago variability can illuminate asymmetrical.

According to a further variation of all the execution of the invention, approximately examples, to increase the variability of the arrangement of light head 2, deflecting mirrors 4 and connecting arm 6 may be designed so that it can be carried out at ent ^¬ ferntem deflecting mirror 4 with a direct radiation of the light source. 8

Fig. 3 shows a lamp 30 according to the third embodiment of the invention. The light head 2 with light source 8, the connecting arm 6 and the mounting ^¬ arm 14 correspond to the lamp 30 of the second embodiment, the corresponding components of the first embodiment. Unlike the first and second th embodiments is disposed convexly at the second Ausführungsbei ^¬ play a deflecting mirror 32 with respect to the light source 2, the orientation and the Ab ^¬ stand to the light source 2 are determined so that the light emitted from the light source 8 light cone with the Publ ^¬ opening angle α completely falls on the concave mirror 32 and is reflected by this in such a way that the reflected light radiation does not ^impinge on the light ^¬ head 2 again.

In this way, a light scattering by the deflection mirror 32 is made.

According to a modification of the third embodiment ^¬ example, a deflection mirror can be used for the deflection mirror 4 of the first and second embodiment and the deflection mirror 32 of the second embodiment, the opposite sides are designed to be reflective in the desired manner.

For the shape of the deflection mirror 32 of the third embodiment, the variants mentioned in the first and second exemplary embodiments can be used for the deflection mirror.

Fig. 6 shows a lamp 36 according to the fourth embodiment. Since the light head 2 with the light ^¬ source 8, the connecting arm 6 and the mounting arm 14 corresponds to the components of the first to third embodiment, the differences from the preceding embodiment will be described below. Instead of the deflection mirror 4, 32 of the first and second embodiments, a plane mirror 38 is provided in the fourth embodiment. The attachment and the angle of inclination of the plane mirror 38 in relation to the light source 8 is made in such a Wei ^¬ se that radiated from the light source 8 on the plane mirror 38 light is not re fl ected to the light source 8 and thus the high efficiency of ^vor¬ forthcoming Embodiments is achieved. As with the deflection mirror of the second embodiment, a scattering of the emitted light from the light source 8 is made in the plane mirror 38 of the fourth embodiment.

According to an alternative of the fourth embodiment ^¬ example, the plane mirror 38 may be performed on two sides with two different light-scattering surfaces, so that the plane mirror can be turned to achieve a different scattering effect by 180 degrees. The present invention is not limited to a particular Fixed To ^¬ gungsart of the lighthead on a reflecting mirror, son ^¬ countries the relative arrangement of light head 2 and Umlenkspie ^¬ gel 4 can by any type of fastening, be mounted inter alia by a provided on the deflecting mirror central Be ^¬ fortification.

Disclosed is a luminaire with a directed beam ^¬ the light source and a Strahlumlenkeinrichtung, wherein the relative arrangement between the light source and Strahlum- steering device is carried out in such a way that the directed light emitted by the light source is reflected by the beam deflecting substantially without direct impact the light source.

Claims

claims

1. lamp (1, 30, 36) with a directionally radiating light source (8) and a Strahlumlenkeinrichtung

(4) to which the light source (8) is provided in such a manner that the light radiated by the light source (8) is reflected by the beam deflecting ^device (4) substantially without subsequent direct impact on the light source (8).

2. Lamp according to claim 1, wherein the light source (8) is attached to an edge portion of the beam deflecting device (4).

3. Lamp according to claim 1 or 2, wherein the beam deflection device (4) is a concave mirror

4. Luminaire according to claim 3, wherein the Strahlumlenkein- direction (4) in at least one plane has a curvature.

5. Lamp according to claim 4, wherein the curvature of the beam deflecting device is formed in such a manner that the light source (8) in the combustion ^¬ be found point of a parabolic segment without vertices.

6. Lamp according to claim 3, 4 or 5, wherein the curvature of the Strahlumlenkeinrichtung the curve of a Ellipse in the area of the semi-minor axis follows to form an ellipsoidally curved dome.

7. Luminaire according to one of claims 3 to 6, wherein the concave mirror (8, 32) provided for beam deflection reversible.

8. Lamp according to claim 1 or 2, wherein the beam deflecting device is a plane mirror (38).

9. Luminaire according to claim 8, wherein the plane mirror (38) has differently strong light-scattering surfaces on the opposite sides.

10. Luminaire according to one of the preceding claims, wherein the light source (8) ^comprises a device for bundling ^¬ ment of the radiation on the beam deflecting device, preferably an integrated bundling device.

11. Luminaire according to claim 10, wherein the light source (8) has a reflector lamp with a halogen lamp or Halo ^¬ genmetalldampflampe as a burner or a halogen ^¬ incandescent lamp with integrated reflector.

12. Luminaire according to one of claims 1 to 8, wherein the light source (8) has a light emitting diode with integrated o- the attached lens.

13. Luminaire according to one of claims 1 to 8, wherein the light source (8) has separate components for generating and bundling the light radiation.

14. Luminaire according to one of the preceding claims, wherein the light source (8) and the Strahlumlenkeinrich ^¬ device (4) via a connecting arm (6) are interconnected.

15. Light according to one of the preceding claims, wherein the lamp (1) via the connecting arm (6) rotatably and / or pivotally and / or slidably mounted.