DE102016203368A1 - LIGHTING DEVICE FOR THE EMISSION OF LIGHTING LIGHT - Google Patents

Abstract

The present invention relates to a lighting device (1) for emitting illumination light (6), comprising a pump radiation source (2) for emitting a pump radiation (3), a phosphor element (4) for converting the pump radiation (3) and a transmissive plate (20). with mutually tilted passage surfaces (21-24), wherein the transmissive plate (20) either the phosphor element (4) upstream of the pump radiation (3) is traversed and these tilted or downstream of the phosphor element (4) is penetrated by the illumination light (6) and this tilts to offset (11) an illumination light spot (40) on the emission surface (7) of the phosphor element (4) from which the illumination light (6) is emitted to a reference point (10) on the emission surface (10). 7) at least partially compensate.

Description

Technical area

The present invention relates to a lighting device for emitting illumination light comprising a phosphor element.

State of the art

In lighting devices of the presently relevant type, a phosphor element is irradiated with a pump radiation. The phosphor element converts the pump radiation into a conversion light, which then at least proportionally forms the illumination light emitted by the illumination device. In the case of a so-called partial conversion, the conversion light can form the illumination light together with an unconverted proportion of pump radiation, in which case, for example, blue pump light can be preferred as pump radiation. On the other hand, however, only the conversion light can form the illumination light (full conversion). Regardless of the implementation in detail, light sources of high luminance can be realized with the combination of pump radiation source and phosphor element arranged at a distance therefrom.

Presentation of the invention

The present invention is based on the technical problem of specifying a particularly advantageous lighting device.

According to the invention, this object is achieved by a lighting device for emitting illumination light, comprising a pump radiation source for emitting a pump radiation, a phosphor element for converting the pump radiation into a conversion light which at least partially forms the illumination light, and a transmissive plate, wherein the pump radiation source, the phosphor element and the transmissive Plate are arranged relative to each other such that in operation, the pump radiation falls on a Einstrahlfläche of the phosphor element and the then emitted at a radiating surface of the phosphor element with a Abstrahl-Schwerpunakichtung illumination light passes through the transmissive plate via two passage surfaces, namely a light entrance surface and an opposite light exit surface, said the passage surfaces of the transmissive plate are tilted towards each other such that the illumination light of the transmissive plate immediately after has a propagation-direction of gravity tilted to the emission-direction of gravity,
as well as one
constructed from the same components lighting device, in which the transmissive plate is penetrated by the pumping radiation before it hits the Einstrahlfläche of the phosphor element, while tilting the Schwerpunakichtung the pumping radiation such that the pumping radiation strikes with a Einstrahl-Schwerpunakichtung on the Einstrahlfläche, the is tilted with respect to an impact direction of gravity with which the pump radiation strikes the radiation entrance surface of the transmissive plate.

Preferred embodiments are to be found in the dependent claims and the entire disclosure, wherein the presentation does not always distinguish in detail between device and method or use aspects; In any case, implicitly, the disclosure must be read with regard to all categories of claims.

The inventor has found that, for example, there may be small deviations in the relative arrangement of the pump radiation source and the phosphor element from the lighting device to the lighting device, for example due to mechanical tolerances of the components used (eg also holders etc.) or also due to installation, ie due to manufacturing fluctuations. As a result, in any case, an illumination light spot on the emission surface of the phosphor element, the position of which depends on that of the pump radiation spot on the irradiation surface, can be offset from a reference point. The radiating surface is typically associated with a lighting optical system, wherein the relative arrangement of phosphor element and lighting optical system is predetermined to each other (which ultimately determines the reference point).

Due to the offset of the illumination light spot on the emission surface, for example, the transmission through the illumination optics can be reduced, that is, its efficiency can be reduced. However, a disadvantage may also arise, for example, insofar as the illumination optical system is preferably configured to guide the illumination light emitted at different locations of the emission surface into different spatial directions, so that there may be angular deviations in the beam guidance and then impairment in the far field.

According to a transmissive plate with mutually tilted passage surfaces in the beam path with the pump radiation or in the beam path with the illumination light is now arranged. In the former case, the position of the pump radiation spot on the irradiation surface is offset by a slight tilting of the pump radiation such that, as a result, the illumination light spot is closer to the reference point; in the latter case, the illumination light spot is not actually offset on the radiating surface, but due to the tilted beam guidance results in a kind virtual offset (seen from the illumination optics, the illumination light spot moves closer to the reference point). In both cases, the offset is compensated and, for example, despite mechanical tolerances / fluctuations during assembly, the illumination light can essentially be guided on the desired path through the illumination optics.

A respective "center of gravity" direction results at the respectively considered point in each case as the mean value of all direction vectors of the radiation beam with the respectively considered radiation / the respectively considered light, wherein in this averaging each directional vector is weighted with its associated beam strength. The illumination light is emitted at the emission surface essentially Lambertsch, the emission-direction of gravity is then perpendicular to the emission surface.

The tilting of the pump radiation / of the illumination light introduced with the transmissive plate is preferably rather small, that is, for example, not greater than in the order of the designation increasingly preferably not more than 20 °, 18 °, 16 °, 14 °, 12 ° or 10 °; Possible lower limits may, for example, be at least 1 °, preferably at least 2 ° and more preferably at least 3 °, wherein in general lower and upper limits may also be of independent interest and should be disclosed.

The illumination light preferably has a predominant part of its spectral intensity distribution in the visible spectral range (380 nm to 780 nm), particularly preferably it lies completely in the visible. The conversion is preferably a down conversion, so the conversion light is longer wavelength compared to the pump radiation. In general, the pump radiation may, for example, also be UV radiation; blue pump light is preferred; the illumination light is preferably white light, which may result, for example, as a mixture of blue pump light and yellow conversion light. It is also expressly referred to the introductory notes.

The pump radiation is preferably laser radiation; the pump radiation source is preferably a laser, which may be constructed from one or even a plurality of individual laser sources, for example in the form of an array. As a laser source, a semiconductor laser is preferred, a single laser source is thus preferably a laser diode with, for example, an emission wavelength in the range of about 405 nm to about 470 nm. In general, in the case of multiple individual laser sources, for example. In Distinguish their dominant wavelength, preferably they have the same dominant wavelength, particularly preferably they are identical. The pump radiation source can be set up for an alternating or at least temporally not completely overlapping (simultaneous) operation of the individual laser sources or preferably for a simultaneous operation.

In any case, the "transmissive" plate is transmissive to the radiation in question / the respective light, for example with a transmittance of at least 85%, 90%, 95% or 98%, averaged over the spectrum of the radiation / light (in the US Pat Order of naming increasingly preferred); Although complete transmission is preferred, technically related upper limits may be, for example, 99.99%, 99.9% and 99%, respectively. Preferably, the plate material from which the transmissive plate is provided, for example glass or a plastic material (eg polycarbonate), has a constant refractive index across the transmissive plate. In general, however, a refractive index which varies at least in regions across the plate would also be conceivable, ie the plate could thus be provided in the manner of a gradient lens and the refractive index gradient assist the tilting.

The transmissive plate can, for example, be "plate-shaped" insofar as, in a direction perpendicular to the light entry surface / radiation entrance surface, it can have an average thickness extent averaged over the plate which is smaller than the mean extent (average of the smallest and largest extent) of the light entry surface. Is at most 1/3, 1/4 or 1/5 thereof, with possible lower limits, for example, at 1/1000 or 1/100 may lie (each in the order of naming increasingly preferred) and Upper and lower limits are generally also of independent interest.

In a preferred embodiment, the illumination device has an illumination optical system, which may generally also be provided non-imaging (for example as so-called Compound Parabolic Concentrator, CPC), but is preferably imaging. The illumination optics is arranged relative to the emission surface in such a way that illumination light emitted at different points of the emission surface is guided in different spatial directions; an embodiment can be preferred in that a respective illuminating light beam beam, which emanates from a respective point of the emission surface and passes through the illumination optics, is collimated one after the other in each case. In principle, the illumination optics can also be constructed from a single lens; Preferably, it is composed of several with respect to the illumination light propagation successive individual lenses. As an alternative or in addition to a lens, the illumination optics can also be a reflection surface or reflection surfaces for Have beam guide, so be configured (also) as a reflector.

In a preferred embodiment, the passage surfaces of the transmissive plate are each plan for themselves. In general, "passage area" refers in each case to the area of a generally generally larger side area of the transmissive plate which is irradiated with the pump radiation / illumination light, whereby only the pump radiation / illuminating light is taken into account on the respective path, ie, for example, backscatter effects are disregarded. The pump radiation enters through the radiation entrance surface into the transmissive plate and through its radiation exit surface; The illumination light enters the transmissive plate through the light entry surface and out through the light exit surface, and each of these surfaces is also referred to as a "passage surface".

In a preferred embodiment, the transmissive plate is a wedge plate, so are their two, each one of the passage surfaces-containing side surfaces in each case a plan for themselves and they are tilted to each other.

In a preferred embodiment, the two passage surfaces of the transmissive plate by a tilt angle of at most 20 °, in the order of naming increasingly preferred at most 18 °, 16 °, 14 °, 12 ° or 10 °, tilted towards each other. Preferred lower limits may, for example, be at least 1 °, 2 ° or 3 ° (increasingly preferred in the order in which they are mentioned) and in general also be independent of an upper limit of interest. The tilt angle corresponds to the intersection angle of two planes, each of which includes one of the passage surfaces. In the preferred case of the wedge plate it corresponds to the wedge angle.

In a preferred embodiment, the phosphor element and the transmissive plate are arranged relative to one another such that one of the passage surfaces of the transmissive plate is parallel to the irradiation surface and / or the emission surface of the phosphor element. "Einstrahlfläche" and "radiating surface" refers to the entire respective side surface of the phosphor element; In general, the Einstrahl- and / or the radiating surface are each preferably flat, particularly preferably both are flat and parallel.

The phosphor element may, for example, have the shape of a flat cuboid whose extent in a thickness direction is considerably smaller than in any of the perpendicular surface directions (eg at most 1/5 or 1/10 thereof, with possible lower limits of 1/1000 or 1/100). The Einstrahl- and the radiating surface then extend in each case in the surface directions, so are, for example, when operating in transmission (see below) opposite each other with respect to the thickness direction.

In the thickness direction, a phosphor element operated in partial conversion may, for example, have a thickness of at least 10 .mu.m, preferably at least 30 .mu.m, more preferably at least 60 .mu.m, possible upper limits being, for example, not more than 200 .mu.m, 150 .mu.m or 100 .mu.m (in FIG the order of naming increasingly preferred) and generally upper and lower limits are also independently of interest. On the other hand, a phosphor element operated in full conversion can be thicker, for example having a thickness (taken in the thickness direction) of at least 0.5 mm, 0.8 mm or 1 mm, possible upper limits being, for example, not more than 3 mm, 2.5 mm or 2 mm (each in the order of naming increasingly preferred) and upper and lower limits in turn, in turn, are also independently of interest.

In a preferred embodiment, the transmissive plate is movably mounted relative to the phosphor element, for example displaceable in a direction parallel to its irradiation and / or emission surface (a surface direction). Such displaceability can be exactly along an axis or along two axes, which are then preferably perpendicular to each other (and parallel to each of the irradiation and / or radiating surface). With such a construction can then be made, for example, during operation or over the lifetime of an adjustment, which is approximately at a dependent on the operating temperature offset (different thermal expansion coefficients) or at a over a long period due to, for example. Vibrations / vibrations may be of interest. With regard to a further field of application, reference is made to the following comments on the motor vehicle headlight.

In a preferred embodiment, the phosphor element and the transmissive plate are provided in direct optical contact. "In direct optical contact" means that the pump radiation / the illumination light between them should not enforce an optically effective air volume; At best, an intermediate material with a refractive index ≥ 1.2, preferably ≥ 1.3, should be provided between the transmissive plate and the phosphor element. Preferably, the two directly adjoin one another (refractive index information generally refers to the refractive index in the context of this disclosure λ = 589 nm). The intermediate material can, for example, form a joint connection layer, that is to say produce an adhesive bond between the transmissive plate and the phosphor element.

Generally, the transmissive plate and the phosphor element may be provided in direct optical contact with each other even when the transmissive plate is movably supported as described above. It can then, for example, an immersion liquid produce the direct optical contact. Preferably, however, this is given in the case of a static arrangement, that is, if the phosphor element and the transmissive plate are fixed in their relative position to each other, which in general (even independent of the direct optical contact) may be preferred.

In a preferred embodiment, a transmissive plate arranged over a gas volume, preferably air, at a distance from the phosphor element is provided. In the case of the upstream arrangement, therefore, the pumping radiation between the transmissive plate and the phosphor element should penetrate the gas volume; in the downstream arrangement, the illumination light passes through the gas volume between the phosphor element and the transmissive plate. The distance between the phosphor element and the transmissive plate may, for example, be at least 0.5 mm, preferably at least 1 mm, particularly preferably at least 1.5 mm; possible upper limits may be, for example, at most 20 mm, 15 mm, 12 mm or 10 mm (in the order of naming increasingly preferred), upper and lower limits in general may also be independently of interest. Concerning. a definition of "spacing" is referred to the following discussion in the context of a predefined distance between the phosphor element and the transmissive plate during manufacture. For example, in the case of the arrangement in the illumination light, the transmissive plate can then, for example, also form the end window of a housing which encloses the phosphor element, thus concealing the housing, for example, together with a further housing part at least to a half space (not optically).

In general, it is generally also possible to operate in reflection for the phosphor element, so that the irradiation and the emission surface can also coincide. With the transmissive plate then both the pump radiation and the illumination light could be guided tilted. However, an operation in transmission is preferred, so the Einstrahl- and the radiating surface are opposite to each other. In general, two transmissive plates could then also be provided in this case, one in the beam path of the pump radiation and the other in that with the illumination light; however, preferably only one transmissive plate is provided.

The invention also relates to a set with a plurality of lighting devices that do not differ from each other except for their respective transmissive plate; However, the transmissive plates of the set each have different strong mutually tilted passage surfaces, ie a different tilt angle (or wedge angle in the case of the preferred wedge plates). Thus, the pump radiation / illumination light is tilted differently from lighting device to illumination device and thus, for example, a different sized offset compensated (see also the explanations at the beginning).

The invention also relates to a method for producing a lighting device disclosed herein. For this purpose, the pump radiation source and the phosphor element, for example, are brought into that relative position, which they then also have in the finished product; Preferably, the two are fixed in position in this relative arrangement, and indeed with the then they also in the finished product in the relative position holding mounting means. The pump radiation source is then put into operation, so that therefore pump radiation in the form of a pump radiation spot falls on the irradiation surface and illumination light is emitted at the emission surface from an illumination light spot. "Spot" in the context of this disclosure refers generally to the respective area of the irradiation or radiating surface which is irradiated with the pumping radiation or from which the illuminating light is emitted; By definition, the edge of a spot should be located where the irradiance has fallen to half, so the spot is determined by the half-width (alternatively, for example, a reference to a drop to 1 / e ^{2 is} possible).

In the production, the offset of the illumination light spot will now be determined. For example, this offset may be taken between a centroid of the illumination light spot that is formed purely geometrically without weighting the irradiance, and the reference point. The reference point preferably results as an intersection of the emission surface with the optical axis of an illumination optics then associated with the emission surface. However, at the time the offset is detected, the illumination optics need not necessarily be mounted; Their mounting position is known and thus also the position of the reference point.

Thus, for example, at the point at which the illumination optics are later mounted, a camera which captures the illumination light spot can be temporarily arranged in the production. Since the position of the camera is known relative to the then later mounted illumination optics, the offset can be determined from the recording.

Depending on the offset then a suitable transmissive plate is selected, the Tilt angle is greater, the greater the offset. Thus, a transmissive plate suitable for compensating for the offset is selected from a plurality of stored transmissive plates with different tilt angles for the respectively produced illumination device. The stored, for a possible insertion depending on the determined offset stockpiled transmissive plates can cover a tilt angle interval, for example, with equidistant support points, such as in 1 ° increments.

The tilt angle interval is preferably assigned an offset interval such that each available tilt angle is assigned a subinterval of the offset interval. The subintervals are disjoint to each other and together complete the offset interval. The determined offset is then assigned to one of the subintervals, which results in the tilt angle that is suitable for compensation and thus determines which transmissive plate is to be used.

Irrespective of this, finally, depending on the type of construction, the transmissive plate is assigned either to the irradiation surface in such a way that it lies in the beam path with the pump radiation or to the emission surface in the beam path with the illumination light (these alternatives relate to the preferred operation in transmission).

In a preferred embodiment, the transmissive plate is predetermined independently of the offset a predefined distance to the phosphor element, so it can vary from lighting device to lighting device of the tilt angle, but the distance is always the same. The distance is taken in each case as the shortest connecting line between the phosphor element and the transmissive plate. In the preferred case of the plane irradiation and radiating surface, it is taken along a straight line perpendicular thereto. In the arrangement in the illumination light, the preferably plane light entry surface of the transmissive plate is preferably arranged parallel to the emission surface; In the arrangement in the beam path of the pump radiation, the preferably plane radiation exit surface of the transmissive plate is preferably arranged parallel to the irradiation surface.

Thus, although a compensation of the offset over the tilt angle is preferred and a compensation over only the tilt angle is particularly preferred, a different offset could generally also be compensated by a distance adjustment, in general even exclusively by a distance adjustment.

In a preferred embodiment, the transmissive plate is oriented such that an angle taken in a sectional plane including a connecting line from the reference point to the illuminating light spot between the passage surfaces of the transmissive plate is equal to the tilt angle. Said sectional plane is perpendicular to the Einstrahl- and / or radiating surface; the connecting line is preferably determined by the area centroid of the illumination light spot and the reference point. Figuratively speaking, the transmissive plate is thus arranged such that a predetermined by the wedge shape direction along the connecting line from the illumination light spot points to the reference point.

The invention also relates to the use of a presently disclosed lighting device for lighting, in particular for motor vehicle (automotive) lighting, such as in an automobile. An advantageous field of application may be in the field of motor vehicle headlights, in which case further preferably also an adaptive illumination may be possible. For example, "adaptive" may mean automatically depending on the traffic ahead / oncoming traffic, so that, for example, specific areas are specifically excluded from a maximum accessible illumination light cone. However, the "adaptive" lighting can also be made, for example, as a function of the steering position of the vehicle itself, that is to say that it relates to an adaptive (deflecting) cornering light. This can be an interesting field of application, in particular in the case of the above-described transmissive plate movably mounted relative to the phosphor element, so that the steering, ie the tilting of the illuminating light cone, can be realized, for example, by displacing the transmissive plate.

Brief description of the drawings

In the following, the invention will be explained in more detail with reference to embodiments, wherein the individual features in the context of the independent claims in another combination may be essential to the invention and continue to distinguish not always in detail between the different categories of claims.

In detail shows

1 a lighting device with pump radiation source, phosphor element and illumination optics in a schematic representation to illustrate an occurring offset;

2 two possibilities according to the invention for the compensation of a basis of 1 illustrated offset, each with a transmissive plate;

3a -C different transmissive plates for compensating for an offset which differ in their respective tilt angle;

4 as an intermediate step of producing a lighting device according to the invention, the determination of a basis of 1 illustrated offset.

Preferred embodiment of the invention

1 shows a lighting device 1 with a pumping radiation source 2 , namely a laser diode, which is a pump radiation 3 emitted in the form of blue laser light. The pump radiation 3 meets a fluorescent element 4 (in this case made of cerium-doped yttrium-aluminum garnet, Ce: YAG), on a Einstrahlfläche 5 of the phosphor element 4 , On excitation with the pump radiation 3 towards emits the phosphor element 4 a conversion light, which together with an unconverted part of the pump radiation 3 an illumination light 6 forms.

The illumination light 6 is in this structure in transmission at one of the Einstrahlfläche 5 opposite radiating surface 7 emitted. In reality, the emission Lambertsch (although there may be some differences in the radiation characteristics of the conversion light and the unconverted pump radiation) takes place; For the sake of simplicity, only one beam is shown, which represents the main propagation direction of the illumination light composed of unconverted pump radiation and conversion light 6 in decoupling direction. The emission of the conversion light takes place in real omnidirectional, so it would also at the Einstrahlfläche 5 Delivered conversion light. To this nevertheless as illumination light 6 To make usable, there is a wavelength-dependent reflective (dichroic) coating provided, which is not shown for clarity (the coating is for the pump radiation 3 transmissive, but reflective here for the yellow conversion light).

The radiating surface 7 is a lighting look 8th assigned, with which at different points of the radiating surface 7 emitted illumination light 6 is guided in different spatial directions (not shown in detail). The illumination optics 8th has an optical axis 9 whose intersection with the radiating surface 7 a reference point 10 sets. Although an illumination light spot (see also 4 for illustration purposes) is not punctiform, but has a certain extent and may have some ellipticity, should the centroid of the illumination light spot in the reference point 10 lie, so the light guide through the illumination optics 8th maximally efficient.

For example due to mechanical tolerances are the pump radiation source 2 and the phosphor element 4 but now a bit far apart, with the relative position of phosphor element 4 and illumination optics 8th predefined, so the reference point 10 is fixed. As the phosphor element 4 and the pump radiation source 2 There is also an offset 11 between the illumination light spot (specifically its area centroid) and the reference point 10 , The illumination optics 8th In the present case, it is extremely simplified, in reality it can be a complex lens system whose efficiency is due to the offset 11 is impaired.

2 shows the inventive compensation of the offset 11 with a transmissive plate 20 , wherein in the figure, two arrangements are shown combined, so ultimately two lighting devices are summarized. The transmissive plate 20 Namely, either in the beam path of the pump radiation 3 the Einstrahlfläche 5 upstream or in the beam path of the illumination light 6 the radiating surface 7 be arranged downstream. In the former case, the pump radiation hits 3 on a radiation entrance surface 21 the transmissive plate 20 and occurs at the opposite radiation exit surface 22 to the phosphor element 4 out. In the second case, the illumination light strikes 6 on a light entrance surface 23 the transmissive plate 20 and occurs at the opposite light exit surface 24 to (in 2 not shown) illumination optics 8th out.

When the Einstrahlfläche 5 of the phosphor element 4 upstream arrangement are due to the mutually tilted passage surfaces 21 . 22 the transmissive plate 20 an impact gravity direction 25 and a single-beam direction of gravity 26 with which the pump radiation 3 then on the Einstrahlfläche 5 meets, tilted to each other. Accordingly, the pump radiation hits 3 offset on the Einstrahlfläche 5 and becomes the offset 11 already compensated on the single-beam side.

With the radiating surface 7 the phosphor element downstream transmissive plate 20 will be the offset 11 virtually balanced. Opposite a radiation-direction 27 is a propagation center of gravity 28 of the illumination light 6 the transmissive plate 20 downstream due to their mutually tilted passage surfaces 23 . 24 tilted. Seen from the (not shown) illumination optics from so the illumination light spot appears on the radiating surface 7 offset, namely to the reference point 10 postponed.

The 3a C illustrate by way of example the phosphor element 4 downstream arrangement, what influence the tilt angle of the transmissive plate 20 , which in the case of the wedge plate is equal to their wedge angle, on the thus possible compensation. From 3a to 3c As a result, the wedge angle / tilt angle increases and thus becomes an increasing offset, beginning with a small offset 11a in 3a up to a large offset 11c in 3c to be compensated. The distance 30 between radiating surface 7 and transmissive plate 20 is kept constant, which is also preferred in the actual production, so that therefore the tilt angle / wedge angle is the only correcting variable. Analogous to the 3a -C would be at one of the Einstrahlfläche 5 upstream arrangement also compensated with increasing tilt angle / wedge angle an increasingly large offset.

4 illustrated for a time of manufacture, such as the offset 11 is determined. Shown is the radiating surface 7 looking at it in the opposite direction of the beam. The offset 11 exists between the illumination light spot 40 , specifically a centroid 41 of it, and the reference point 10 , The offset 40 is detected and assigned to one of the dashed indicated, annular nested offset intervals. Each offset interval is assigned a specific tilt angle / wedge angle (cf. 3a -C for comparison), the larger the offset 11 , the greater the tilt angle / wedge angle.

The reference point 10 puts together with the centroid 41 of the illumination light spot 40 a straight 42 firmly. The depending on the offset 11 selected transmissive plate 20 then becomes so relative to the radiating surface 7 arranged that in a sectional plane, which this straight line 42 includes (and perpendicular to the radiating surface 7 / the plane is) between the passage surfaces 23 . 24 taken angle is equal to the wedge angle. The wedge direction thus points along the straight line 42 ,

LIST OF REFERENCE NUMBERS

1

 lighting device

2

 Pump radiation source

3

 pump radiation

4

 Fluorescent element

5

 irradiation surface

6

 illumination light

7

 radiating

8th

 illumination optics

9

 Optical axis of the illumination optics

10

 reference point

11

 offset

20, 20a, b, c

Transmissive plate

21

 Radiation entrance area

22

 Radiation exit area

23

 Light entry surface

24

 Light-emitting surface

21, 22, 23, 24

 Passage areas

25

 Impingement centroid direction

26

 Single-focus direction

27

 Radiating centroid direction

28

 Propagation of gravity direction

30

 distance

40

 Illumination light spot

41

 Center of gravity of the illumination light spot

42

 Just

Claims (15)

Lighting device ( 1 ) for the emission of illumination light ( 6 ), with a pump radiation source ( 2 ) for emitting a pump radiation ( 3 ), a phosphor element ( 4 ) for the conversion of the pump radiation ( 3 ) in a conversion light, which at least partially the illumination light ( 6 ) and a transmissive plate ( 20 ), the pump radiation source ( 2 ), the phosphor element ( 4 ) and the transmissive plate ( 20 ) are arranged relative to one another such that during operation the pump radiation ( 3 ) on a Einstrahlfläche ( 5 ) of the phosphor element ( 4 ) and then at a radiating surface ( 7 ) of the phosphor element ( 4 ) with a radiation-direction ( 27 ) emitted illumination light ( 6 ) the transmissive plate ( 20 ) over two passage surfaces ( 23 . 24 ), namely a light entry surface ( 23 ) and an opposite light exit surface ( 24 ), whereby the passage areas ( 23 . 24 ) of the transmissive plate ( 20 ) are tilted to each other such that the illumination light ( 6 ) of the transmissive plate ( 20 ) immediately downstream of the one to the radiation-direction ( 27 ) tilted propagation center of gravity ( 28 ) Has. Lighting device ( 1 ) for the emission of illumination light ( 6 ), with a pump radiation source ( 2 ) for emitting a pump radiation ( 3 ), a phosphor element ( 4 ) for the conversion of the pump radiation ( 3 ) in a conversion light, which at least partially the illumination light ( 6 ) and a transmissive plate ( 20 ), the pump radiation source ( 2 ), the phosphor element ( 4 ) and the transmissive plate ( 20 ) are arranged relative to one another such that during operation the pump radiation ( 3 ) the transmissive plate ( 20 ) over two passage surfaces ( 21 . 22 interspersed, namely a radiation entrance surface ( 21 ) and an opposite radiation exit surface ( 22 ), and the transmissive plate ( 20 ) downstream on a Einstrahlfläche ( 5 ) of the phosphor element ( 4 ), whereupon the illumination light ( 6 ) on a radiating surface ( 7 ) of the phosphor element ( 4 ), the pump radiation ( 3 ) with an impact direction ( 25 ) on the radiation entrance surface ( 21 ) of the transmissive plate ( 20 ), and wherein the passage surfaces ( 21 . 22 ) of the transmissive plate ( 20 ) are tilted relative to one another such that the pump radiation ( 3 ) with a direction of impact ( 25 ) tilted single-beam direction of gravity ( 26 ) on the Einstrahlfläche ( 5 ) meets. Lighting device ( 1 ) according to claim 1 or 2 with an illumination optics ( 8th ), which at different points of the radiating surface ( 7 ) emitted illumination light ( 6 ) leads in different spatial directions. Lighting device ( 1 ) according to one of the preceding claims, in which the passage surfaces ( 21 - 24 ) of the transmissive plate ( 20 ) are each for themselves plan. Lighting device ( 1 ) according to claim 4, in which the transmissive plate ( 20 ) is a wedge plate. Lighting device ( 1 ) according to claim 4 or 5, wherein the passage surfaces ( 21 - 24 ) are tilted by a tilt angle of at most 20 ° to each other. Lighting device ( 1 ) according to one of the preceding claims, in which one of the passage surfaces ( 21 - 24 ) of the transmissive plate ( 20 ) to the Einstrahlfläche ( 5 ) and / or the radiating surface ( 7 ) of the phosphor element ( 4 ) is parallel. Lighting device ( 1 ) according to one of the preceding claims, in which the transmissive plate ( 20 ) relative to the phosphor element ( 4 ) is movably mounted. Lighting device ( 1 ) according to one of the preceding claims, in which the phosphor element ( 4 ) and the transmissive plate ( 20 ) are provided in direct optical contact with each other. Lighting device ( 1 ) according to one of claims 1 to 8, in which the phosphor element ( 4 ) and the transmissive plate ( 20 ) are arranged spaced apart over a gas volume. Set with a plurality of lighting devices ( 1 ) according to one of the preceding claims, mutually connected with respect to the pump radiation sources ( 2 ), the phosphor elements ( 4 ) and their respective relative arrangement are identical, but in their respective transmissive plate ( 20 ), in each case in a tilt angle of the transmissive plate ( 20 ) around which their passage surfaces ( 21 - 24 ) are each tilted to each other. Method for producing a lighting device ( 1 ) according to any one of claims 1 to 10, comprising the following steps: - relative to each other arranging pump radiation source ( 2 ) and phosphor element ( 4 ); Determining the offset ( 11 ) of an illumination light spot ( 40 ) on the radiating surface ( 7 ) out of which the illumination light ( 6 ) is emitted to a reference point ( 10 ) on the radiating surface ( 7 ); - holding several transmissive plates ( 20a , b, c), which differ in their respective tilt angle, around which the passage surfaces ( 21 - 24 ) are each tilted to each other; - selecting one of the transmissive plates ( 20a , b, c) depending on the offset such that the larger the offset ( 11 ), the greater the tilt angle of the selected transmissive plate ( 20 ); - installation of the selected transmissive plate ( 20 ) for at least partial compensation of the offset ( 11 ). Method according to Claim 12, in which for the installation of the transmissive plate ( 20 ) regardless of the offset ( 11 ) a predefined distance ( 30 ) between the transmissive plate ( 20 ) and the phosphor element ( 4 ) is given. Method according to Claim 12 or 13, in which the transmissive plate ( 20 ) is oriented in such a way that one between the passage surfaces ( 21 - 24 ) taken in a sectional plane angle, which cutting plane to the radiating surface ( 7 ) and / or the Einstrahlfläche ( 5 ) is perpendicular and a connecting line ( 42 ) from the reference point to the illumination light spot ( 40 ), is equal to a tilt angle, around which the passage surfaces ( 21 - 24 ) of the transmissive plate ( 20 ) are tilted to each other. Use of a lighting device ( 1 ) according to one of claims 1 to 10 for illumination, in particular for vehicle lighting, in particular in a motor vehicle headlight, in particular for adaptive illumination in a motor vehicle headlight.

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