EP3194839A1 - Laser headlight with a movable light-deflecting element - Google Patents

Laser headlight with a movable light-deflecting element

Info

Publication number
EP3194839A1
EP3194839A1 EP20150771872 EP15771872A EP3194839A1 EP 3194839 A1 EP3194839 A1 EP 3194839A1 EP 20150771872 EP20150771872 EP 20150771872 EP 15771872 A EP15771872 A EP 15771872A EP 3194839 A1 EP3194839 A1 EP 3194839A1
Authority
EP
Grant status
Application
Patent type
Prior art keywords
light
direction
laser
phosphor
characterized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20150771872
Other languages
German (de)
French (fr)
Inventor
Joachim Knittel
Christian Buchberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automotive Lighting Reutlingen GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16Laser light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/30Semiconductor lasers

Abstract

The invention relates to a laser headlight with a laser light source, a luminescent material, and a light-deflecting device which illuminates different sub-regions of the luminescent material with laser light at different times, said light-deflecting device having a movable first light-deflecting element which directs incident laser light in different spatial directions at different times. The light-deflecting device deflects light oriented in a first spatial direction towards a first sub-region of the luminescent material in a first beam path and light oriented in a second spatial direction towards a second sub-region of the luminescent material in a second beam path. The headlight is characterized in that the headlight is designed to allow the light deflected towards the first sub-region and the light deflected towards the second sub-region to be incident as parallel as possible to each other.

Description

    Laser light with a mobile light deflection
  • The present invention relates to a laser headlight according to the preamble of claim 1.
  • Such a laser headlight has a laser light source, a phosphor and a light directing device that is configured to illuminate mutually different portions of said phosphor separated in time from each other with laser light, wherein the light directing device comprises at least one movable first light deflection element, which is adapted to be incident to direct laser light at various times in different spatial directions, and wherein the light directing device is adapted to directed in a first direction in space light in a first beam path to direct a first portion of the phosphor, and in a second spatial direction directional light in a second beam path to a directing the second portion of the phosphor.
  • Such a light deflection is also referred to as a scanner. With such a scanner, for example, spotlights can be built that can virtually create any distribution of light. This allows a dynamic adjustment of light distribution produced by the headlamp to changing traffic conditions.
  • To take as an installed in the motor vehicle camera on the traffic situation ahead of the vehicle. Software analyzes the images and controls the light deflection and thus the light distribution so that the road is always optimally illuminated and a dazzling oncoming traffic is avoided. This increases safety when driving at night especially.
  • A equipped with such a scanner spotlight is known for example from DE 10 2007 055 480 B3. In the known object, a focused laser beam of a laser which emits blue light using a scanner with a phosphor (for example, a phosphor) is moved, which converts the blue light of the laser by mixing with yellow or yellow-red fluorescence light in white mixed light. The white light is directed through a lens onto the roadway. By moving the light spot of the focused laser beam on the luminous means and simultaneously modulating the laser power arbitrary light distribution can be produced.
  • From EP 0291475 A2 a headlamp is known, comprising an angularly movable reflector which deflects a narrow beam in different directions in space very quickly. As a result, small areas in step with the changes in direction of the beam are sequentially illuminated and scanned with light and scanned it. The total area that is the union of the sequentially scanned lit small areas, presents to the human sense of sight at a sufficiently rapid scanning and periodically sufficiently quickly repeated sample sequence as a cohesive, bright surface and thus as a continuous light distribution. A sufficiently rapid sampling results for example, if the scan sequence is repeated with a frequency greater than 100 Hz.
  • In known laser headlights that work with these scanners, it has been shown that the light color emitted by the phosphor in different directions light changes depending on the direction. For example, the light of the headlight in a direction appears rather somewhat whiter than in a second direction and in the second direction a little more yellow than in the first direction to be. This is an undesirable effect.
  • The object of the invention is to provide a laser headlamp of the initially-mentioned type in which this undesirable effect does not occur or at least occur only in a greatly reduced extent.
  • This object is achieved with the features of claim 1.
  • From the known laser headlights, the laser headlight according to the invention is distinguished by the characterizing features of claim 1. The headlight according to the invention thus has the above-mentioned features of the preamble of claim 1 and is further characterized in that it is adapted to the steered to the first portion to allow light there incident from a first direction of incidence and to the steered to the second portion of light there incident from a second incidence direction, wherein an angle between the first direction of incidence and the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction ,
  • The concept of spatial direction refers to the emitted light, while the term of the direction of incidence is related to the incident light. , The direction of incidence refers as is customary in the optics when the solder of the illuminated surface at the impact point of the light beam. In the prior art, the difference of the directions of incidence varies as strong as the spatial directions of the outgoing from the movable first light deflection light upon movement of the movable first Lichtumlenkelements.
  • Characterized in that the laser headlight according to the invention is adapted to come up with the steered to the first part-region light there from a first direction of incidence and to the steered to the second portion of light there incident from a second incidence direction, wherein an angle between the first direction of incidence and the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction, the difference of the directions of incidence varies less than the spatial directions of the outgoing from the movable first light deflection light upon movement of the movable first Lichtumlenkelements in the invention.
  • The invention is based on the realization that the directionality of the light color also depends on with which preferential direction scattered in the phosphor laser light (primary light) emerging from the phosphor and that this preferred direction depending on the direction of incidence on the phosphor and thus the point of incidence on the phosphor while proceeding from the phosphor fluorescent light has an independent incidence of this emission characteristic. so that undesirable color variation depends on the angle variation of the incident on the phosphor laser light. The larger this angle variation, the greater the unwanted color variation. The angle variation according to the invention is smaller than the angular variation in the spatial directions, in which the laser light from the first movable emanating light deflection in each case. As a result arises also the desired reduction in the color variation in the invention.
  • A preferred embodiment is characterized in that especially the light directing of the laser beam can be adapted to come up with the steered to the first part-region light there from a first direction of incidence and to the steered to the second portion of light there incident from a second direction of incidence, wherein an angle of incidence between the first direction and the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction.
  • Characterized that especially the light directing device is appropriately configured, to further changes of the laser headlight unnecessary. The invention can be realized in this way as a constructive complement existing systems, reducing development costs and facilitate adaptation to the type of vehicle to vehicle type, if necessary, different headlight designs.
  • It is also preferred that the angle of incidence between the first direction and the second direction of incidence is less than half, in particular less than a quarter, in particular less than 10% of the angle between the first spatial direction and the second spatial direction. This configuration provides a further approximation to the ideal case in which the undesirable directionality of the light color disappears represents.
  • It is further preferred that the first direction of incidence is parallel to the second direction of incidence. This configuration realizes the ideal case in which the undesirable directionality of the light color disappears.
  • A preferred embodiment is characterized in that the light directing device comprises a second light deflection element, which is located in the beam path between the movable first light deflection element and the phosphor.
  • It is also preferable that the light directing device comprises a light deflection element arranged between the movable and phosphor collimating optics, in particular converging lens.
  • It is further preferred that the collecting lens is a convex-planar lens, facing with its planar side of the phosphor.
  • A preferred embodiment is characterized in that the collecting lens is disposed in the beam path directly in front of the phosphor.
  • It is also preferred that the phosphor is disposed adhesively on the planar side of the lens.
  • It is also preferable that the phosphor has a curved shape so that the sections give a curved surface in their sum. This configuration has the particular advantage that it requires a second light deflection only a particular form of the phosphor, but no additional parts such as lenses or mirrors. The surface is preferably straight curved so that related to the solder a surface element the point of incidence of a light beam incident direction from the point of impact is independent.
  • A preferred embodiment is characterized in that the second light deflection element having a curved mirror surface.
  • It is also preferred that the second light deflection element is a movable light deflection element, which is at the same time with the first movable deflection element movable.
  • It is further preferred that the second light deflection element is a Fresnel lens or a flat diffractive structure.
  • Further advantages result from the following description, the drawings and the dependent claims. It is understood that the features mentioned above and useful features to be explained not only in the respectively specified combination but also in other combinations or even alone, without departing from the scope of the present invention.
  • Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description.
  • These show, each in schematic form:
  • 1 shows the schematic construction of a laser light module of a known laser scanner with the headlamp;
  • 2 shows the subject of Figure 1 in a situation with perpendicular incidence of light on the phosphor;
  • Figure 3 shows the object of Figure 1 in a situation with a sloping incidence;
  • 4 shows a first embodiment of a laser headlight 10 according to the invention;
  • 5 shows elements from the Figure 4, together with angular relationships for different beam paths;
  • 6 shows an embodiment in which the phosphor has a curved shape;
  • 7 shows a configuration in which the light directing device comprises a movable second light deflection;
  • 8 shows a configuration in which the light directing device comprises a stationary second light deflection; and
  • 9 shows a configuration in which the light directing device comprises as a second light deflection element, a Fresnel lens or a flat diffractive structure, for example a diffraction grating.
  • 1 shows the schematic structure of a laser light module of a known laser headlight with scanner. 7, the light of a blue laser 1 is focused by a lens 2 and a scanner 3 to a phosphor. 5 The scanner is controlled as a fast moving mirrors. A blue laser is a laser that emits blue light from the visible spectral range.
  • The phosphor, which is realized for example as a phosphor layer that scatters blue light and converts a portion of it into yellow light. The blue and yellow light components together produce white mixed light 11. The scanner makes it possible to direct the laser beam to different areas 5a, 5b of the phosphor. In different areas of the laser beam from different directions of incidence falls, so at different angles to the vertical one at the impact point. The change of the incident angle from area to area is particularly large, when the distance between the scanner and the phosphor is small. but small distances are necessary to the overall size of the spotlight to keep small.
  • changes the angle of incidence of the laser beam on the phosphor, this may lead to the emission characteristic of the blue color component changes relative to the yellow color component. Thus, the ratio of light intensities and thus the color of the mixed light produced changes. The color of the mixed light is thus a function of location and varies between different yellow and white colors. The mixing light generated in the phosphor 5 4 is directed via a projection lens 6 in the headlight advance, where it is used in an intended use of the headlamp in a motor vehicle for lighting the carriageway.
  • By a modulation of the laser intensity as a function of the position of the laser beam, various light distributions can be generated on the road surface.
  • Figures 2 and 3 illustrate a change in the emission characteristics of the scattered laser light in the phosphor with a change in the incident direction of the laser light. The figure 2 shows a situation with normal incidence, and Figure 3 shows a situation with oblique incidence.
  • In FIG. 2, the blue laser light 7 falls vertically on the phosphor 5. A part 9 of the blue laser light 7 is scattered, preferably in the forward direction, ie, in the imaginary extension of the direction of incidence of the laser light 7 onto the phosphor 5. This blue color portion 9 has a maximum intensity in the direction of the incident laser beam 7. Another portion of the blue laser light is absorbed by the light source and emitted as fluorescent light in the yellow spectral 8 with a certain emission. In the case illustrated this is a Lambert emission characteristic.
  • In Fig. 3, the laser beam 7 is obliquely incident on the luminous means 5 a. Another part of the blue laser light is preferably scattered in the forward direction, and thus in the direction of the obliquely incident laser beam. Due to the longer distance in the bulbs, however, the effective scattering is stronger than at normal incidence. Thus, the scattering in the preferred forward direction is less pronounced than at normal incidence.
  • As with normal incidence, a certain proportion of the laser light is absorbed by the phosphor and emitted as fluorescent light 8 in the yellow or yellow-red spectral range again. The emission of fluorescent light 8 does not depend on the direction of incidence of the laser light.
  • In comparing Figures 2 and 3, different distributions of the yellow color components give thus 9 and blue color components 8 at oblique incidence and with normal incidence of laser light. This means that also set different tones of the mixed light in the two beam directions.
  • The invention is, however, achieved in the ideal case, that the laser beam across the scan area impinges from the same incident direction on the phosphor. The scattered laser light will then have the same radiation characteristics in each partial area of ​​the phosphor. This ensures that the light color in the entire scan area is not changed.
  • 4 shows a first embodiment of a laser according to the invention headlight 10. The headlight 10 includes a housing 12 with a light exit opening that is covered by a transparent cover plate fourteenth In the interior of the headlamp 10, a laser light module is 16. In particular, the laser light module includes a laser light source 18 that emits laser light 17 from a first wavelength range. The first wavelength region preferably comprises a narrow range from the blue part of the spectrum of visible light. The light emitted from the laser light is focused by the first focusing lens 20 and directed from the movable first light deflection element 22 to the condenser lens 24th The movable first light deflection element is moved oscillatingly about a pivot point 21 by an actuator 19th The actuator 19 is for example a piezoelectric actuator or a micromirror. The actuator 19 is controlled by a control unit 23, to the processes for forming a control signal for the actuator 19 signals from vehicle sensors such as a run-up camera, an ambient light sensor, a driver's request encoder, etc. receives signals from a central lighting control unit of a motor vehicle, without this listing is meant to be exhaustive.
  • The converging lens 24 forms together with the first movable light deflecting an embodiment of a light directing in the sense of claim 1. The condenser lens 24 is disposed between the movable light deflection element 22 and the phosphor 26th
  • The phosphor, which is realized for example as a phosphor layer that scatters blue light and convert a portion thereof into yellow or yellow-red light fluorescence light. The blue and yellow light components add up to the white mixed light. but the invention is not limited to this particular conversion and mixing. Generally, laser light of a shorter wavelength in the phosphor is converted partly into fluorescent light of a longer wavelength. The fluorescent light mixes with scattered, but did not convert laser light to a mixed light.
  • The converging lens (24) directs the incident laser light (17) ideally parallel and makes it incident on the lying in the light path downstream of the converging lens phosphor 26th The development by the first focusing lens 20 focusing effect in association with the already small diameter and aperture angle of the laser beam 17, that at any time only a portion 26a, 26b of the light entrance surface of the phosphor is illuminated 26th In the figure 1, this is just an upper portion 26a of the phosphor. Therefore, from this sub-area white mixed light 28 goes out, which is directed from the projection optics 30 in the apron of the light module 16 and thus of the headlamp 10th By a plane fully controlled movement of the movable first deflecting element 22 successively several portions 26a, 26b, ... of the phosphor 26 are illuminated with the laser beam 17th Of each portion of the projection optical system 30 is illuminated from a different direction with white mixed light 28th The projection optical system 30 generates a corresponding bright spot ahead of the headlamp 10 is then also at different points of the apron. By sufficiently rapidly moving the movable first Lichtumlenkelementes 22 a light distribution is generated as the sum of the bright light spots generated by the projection optical system 30 in this manner. The movement takes place particularly quickly enough when the sequence of the different positions of the movable first Lichtumlenkelements with a frequency of more than 100 Hz, is repeated because the human sense of sight then only perceives an average brightness of the light distribution generated in total.
  • 5 shows elements from the figure 1, together with angular relationships for different beam paths. In detail, Figure 5 shows a first optical path 32 in which the laser light between the movable first light deflection element 22 and the phosphor 26 propagates and a second optical path 34 in which the laser light also propagates between the movable first light deflection element and the phosphor.
  • The first optical path passes from the first light deflection movable in a first spatial direction, and the second optical path is based in a second spatial direction by the moving first light deflection.
  • The splitting in the different spatial directions is generated by angular displacements of the movable first Lichtumlenkelementes about an axis perpendicular to the plane of axis of rotation. Figure 5 illustrates this situation inasmuch simplified form, as it merely depicts an angular position of the movable first Lichtumlenkelementes.
  • The first of the two spatial directions is coupled to a first portion of the phosphor via the first beam path. The coupling is effected in that illuminates the first portion in this ray path propagating light. This applies anlog for the coupling of the second spatial direction with the second portion and for all other pairs of spatial directions and portions. The angle α is the angle between a first direction in space, which is coupled to the first portion 26a, and a second spatial direction, which is coupled to the second portion 26b. By the collimating effect of the converging lens, only the main plane of which is shown in the figure 5, the angle between the two beam paths is reduced in the lens. The laser light incident on the first optical path from a first direction of incidence on the first partial region and the laser light incident on the second beam path from a second direction of incidence on the second partial region, enclose an angle β. The angle β is smaller than the angle α, which is caused by the subject matter of Figures 1 and 2 by the converging or better parallelizing action of the converging lens.
  • The light deflection is the subject matter of Figures 4 and 5, a mirror which is pivotable about a perpendicularly oriented to the plane of axis 21st The focal length of the condenser lens 24 corresponds in the ideal case, the distance between the main plane of the axis of rotation 21, and the rotational axis 21 preferably intersects the outgoing of the focusing optics laser beam 17. With these features it is achieved that β for all beam paths is equal to zero, or at least very close is zero. As a result arises behind the light beam then no dependence of the light color of the mixed light from the location on the phosphor from which the mixed light emanating respectively. It is particularly preferred that the direction of incidence is parallel to the perpendicular to the light entry surface of the phosphor, that is, perpendicular to that surface.
  • The converging lens is preferably arranged in the beam path immediately in front of the phosphor, as shown in FIG. 4 In a particularly preferred embodiment the phosphor is arranged adhered to the planar side of the lens. By this arrangement, the lens immediately before the phosphor is a maximum angular range of variation for the angle α between a first spatial direction, which is coupled to the first portion, and a second spatial direction, which is coupled to the second portion, with the smallest possible overall length or installation depth of the headlight reached.
  • 6 shows an embodiment in which the phosphor 26 has a curved shape. The phosphor is preferably curved so that its associated with the movable first light deflection side is concavely curved. The radius of curvature is preferably locally in each case dimensioned so that the surface normal of each portion of the luminescent material passes through the portion of the movable first Lichtumlenkelementes to which the laser beam is focused 17th This embodiment has the advantage that no further light deflection between the phosphor 26 and the first movable light deflection element 22 is required.
  • 7 shows an embodiment in which the light directing device comprises a second light deflection element 36, which is located in the beam path between the movable first light deflection element and the phosphor 26th Specifically, Figure 6 shows this case a first optical path, a second beam and a third beam path. The three optical paths extending between the laser light source 18 and the movable first light deflection element 22 is still common, and they are split by the movable first light deflection element 22 in three different directions in space and thus three different beam paths. The splitting is generated by angular displacements of the movable first Lichtumlenkelementes about an axis perpendicular to the plane of axis of rotation. Figure 7 illustrates this situation in a simplified form so far as it depicts only one angular position of the movable first Lichtumlenkelementes 22nd However, the curved arrow next to the movable first Lichtumlenkelementes 22 represents the rotational mobility of the movable first Lichtumlenkelementes 22 about said axis of rotation.
  • By splitting up into the different spatial directions in the propagating these spatial directions light impinges after spatial directions isolated on at spatially different locations of the second Lichtumlenkelementes 36th The second light deflection is the same as the first light deflection rotatably controllable about an axis perpendicular to the plane of axis in its angular position here. therefore, it is a controlled movable second light deflection element 37. The angular position of the second Lichtumlenkelements is always just shifted in time with an adjustment of the angle of the movable first Lichtumlenkelementes so that the angle β (see Figure 5) between the beams of the second light deflection go out, is always smaller than the angle α between beams incident from the first light deflection based on the movable second light deflection.
  • Figure 7 illustrates this situation in a simplified form insofar as it merely depicts an angular position of the second Lichtumlenkelementes. The curved arrow in the second light deflection represented here too, the rotational mobility of the movable second Lichtumlenkelementes 37 about said axis of rotation.
  • The movable second light deflection element 37 is preferably at the same time moved with the moving first light deflection element 22 so that the angle β is zero, so that the impinging at various locations of the phosphor rays are parallel. Then the same light color is based on all areas of the phosphor light. The adjustment is preferably carried out in the manner described with reference to Figure 4 for the first movable light deflection element 22 manner.
  • 8 shows an embodiment in which the light directing device comprises as a second light deflection element 36 a stationary second light deflection element 38, in the beam path between the movable first light deflection element 22 and the phosphor is 26 and having a curved mirror surface. The curved mirror surface is in particular formed so that incident rays are reflected there so on different parts of the mirror surface such that the reflected beams form an angle β, the α compared to the angle formed by the incident rays less and ideally is equal to zero.
  • 9 shows an embodiment in which the light directing device comprises as a second light deflection element 36, a Fresnel lens or a flat diffractive structure, for example a diffraction grating. A diffractive structure is due to the monochromatic nature of the laser light Here, a suitable means for changing the direction of light propagation.

Claims (13)

  1. Laser projector (10) having a laser light source (18), a phosphor (26) and a light directing device, which is arranged to mutually different portions (26a, 26b) of the phosphor of one another separated in time with laser light (17) to light, wherein the light directing at least having a movable first light deflection element (22) which is adapted to straighten up incident laser light at various times in different spatial directions, wherein the light directing device is adapted to directed in a first direction in space light in a first beam path (32) first to a portion (26a) to direct the phosphor, and oriented in a second direction in space light in a second beam path (34) on a second portion (26b) to direct the phosphor, characterized in that the laser headlight is adapted to that on the first portion guided light there from a first einfal to come up lsrichtung and to the steered to the second portion of light there incident from a second incidence direction, wherein an angle (β) between the first incidence direction and the second direction of incidence is smaller than the angle (α) between the first spatial direction and the second spatial direction.
  2. Laser projector (10) according to claim 1, characterized in that the light directing of the laser beam can be adapted to the to the first portion (26a) guided light there from a first incident direction to come up and to the second portion (26b) guided light there to come up from a second incidence direction, wherein an angle (β) of incidence between the first direction and the second direction of incidence is smaller than the angle between the first spatial direction and the second spatial direction (α).
  3. Laser projector (10) according to claim 1 or 2, characterized in that the angle (β) between the first direction of incidence and the second incident direction is less than half, in particular less than a quarter, in particular less than 10% of the angle (α) between the is first spatial direction and the second spatial direction.
  4. Laser projector (10) according to claim 3, characterized in that the first incident direction is parallel to the second direction of incidence.
  5. Laser projector (10) according to one of claims 2 to 4, characterized in that the light directing device comprises a second light deflection element (36) in the beam path between the movable first light deflection element (22) and the phosphor (26).
  6. Laser projector (10) according to one of claims 2 to 4, characterized in that the light directing a light deflection element between the movable (22) and the phosphor (26) disposed collimating optics, for example, comprises a collecting lens.
  7. Laser projector (10) according to claim 6, characterized in that the collecting lens is a convex-planar lens, facing with its planar side of the phosphor.
  8. Laser projector (10) according to claim 7, characterized in that the collecting lens is disposed in the beam path directly in front of the phosphor.
  9. Laser projector (10) according to claim 8, characterized in that the phosphor is disposed adhesively on the flat side of the collecting lens.
  10. Laser projector (10) according to claim 1, characterized in that the luminescent material (26) has a curved shape so that the sections give a curved surface in their sum.
  11. Laser projector (10) according to claim 5, characterized in that the second light deflection element having a curved mirror surface.
  12. Laser projector (10) according to claim 5 or 11, characterized in that the second light deflection element (36) is a movable light deflection element (37) which is at the same time with the first movable deflection element movable.
  13. Laser projector (10) according to claim 1, characterized in that the second light deflection element is a Fresnel lens or a flat diffractive structure.
EP20150771872 2014-09-19 2015-09-17 Laser headlight with a movable light-deflecting element Pending EP3194839A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE201410218955 DE102014218955A1 (en) 2014-09-19 2014-09-19 Laser light with a mobile light deflection
PCT/EP2015/071272 WO2016042052A1 (en) 2014-09-19 2015-09-17 Laser headlight with a movable light-deflecting element

Publications (1)

Publication Number Publication Date
EP3194839A1 true true EP3194839A1 (en) 2017-07-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20150771872 Pending EP3194839A1 (en) 2014-09-19 2015-09-17 Laser headlight with a movable light-deflecting element

Country Status (3)

Country Link
EP (1) EP3194839A1 (en)
DE (1) DE102014218955A1 (en)
WO (1) WO2016042052A1 (en)

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DE102017204775A1 (en) * 2017-03-22 2018-09-27 Robert Bosch Gmbh Headlight for a vehicle, and manufacturing method for a headlamp

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US9534756B2 (en) * 2012-04-03 2017-01-03 Sharp Kabushiki Kaisha Light-emitting device, floodlight, and vehicle headlight

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