• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a laser unit (2) for a vehicle headlight with a laser diode (11) and an adjustable optical system with optical elements associated with the laser diode (11), at least one of the optical elements is selected from the group consisting of a collimator (13, 22) and a deflecting mirror (20) pivotably supported around at least one spatial axis.
    公开号:AT515375A1
    申请号:T50032/2014
    申请日:2014-01-20
    公开日:2015-08-15
    发明作者:Matthias Mayer
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    Laser unit for a vehicle headlight
    The invention relates to a laser unit for a vehicle headlight and a corresponding laser module.
    Various types of vehicle headlamps are known in the prior art, with headlamps having discharge lamps and halogen light sources being used predominantly in recent years. For energy saving reasons and to further reduce the space requirement of vehicle headlamps, the use of laser light sources such as semiconductor lasers is increasingly being tested, since they are advantageous in this regard. In order to make the laser light usable for a vehicle headlight, a light conversion means, a so-called phosphor converter, is irradiated with a laser light source, which is thereby excited to emit visible light.
    In so-called static systems, the laser beam is directed immovably to the phosphorus converter. In contrast, in the so-called dynamic system, the laser beam or the laser beams, which are used to excite the phosphorus converter, moved by means of oscillating mirrors on the phosphorus converter, so that the eye creates a light image, which is the outer shape of the phosphor Converter corresponds. By suitable shaping of the phosphor converter certain light functions or precise light-dark limits of the light functions such as high beam, low beam and the like can be achieved.
    For example, US 2011/0194302 A1 shows a laser unit in which a laser diode radiates from behind via a light-guiding element onto a fluorescent substance, which in turn emits visible light which is directed in the direction of travel via a reflector screen. The laser light sources used here emit energies up to 3 W in the main emission direction of the headlamp. In the event of a malfunction or damage to the headlamp, high-intensity, eye-damaging laser light radiation can result in injuries, or at least endanger other road users.
    Essential for a flawless and safe operation of such a laser system in a vehicle headlamp is therefore the precise alignment of the laser beam or laser beams on the one or more light conversion means or the mirror or mirrors and in the sequence on the phosphorus converter, this being by adjustable optics , which directs the light emitted by the laser Dio de light on a deflection mirror, is accomplished. For example, the diameter of an oscillating mirror is only a few millimeters, so it is of utmost importance, especially when using multiple laser beams to excite the light conversion means, to align the lasers exactly to the mirror. The adjustment of the adjustable optics usually has to be made individually for each laser, because due to production tolerances of the laser and the optical elements of the adjustable optics and their fixing to a corresponding mounting element, a default that meets the requirements for accuracy of alignment, not is possible.
    In the prior art solutions have been proposed for this purpose, in which a collimator lens of a laser unit was glued by means of a lens holder in a corresponding bearing plate, but this method requires a lot of effort and in particular a certain skill in the assembly in mass production. Moreover, when using several laser units to excite a phosphorus converter, it is difficult to achieve optimum matching of the individual laser beams to one another when the adhesive used has once hardened, since readjustment is not readily possible.
    The invention is therefore based on the object of specifying a laser unit in which the setting of the laser diode associated adjustable optics or their optical ele- ments can be done easily and precisely and a final fixation of the position of the lens only in a setting of downstream assembly or process step can take place.
    To achieve this object, a laser unit of the type mentioned above has a laser diode and a laser diode associated with the adjustable optics with optical elements and is inventively characterized in that at least one of the optical elements selected from the group consisting of a collimator and a deflection mirror to at least a spatial axis is pivotally mounted. The laser unit with the laser diode and the adjustable optical system can be fixed in or on a headlight, wherein the pivotable fixing of the optical elements defined according to the invention allows, after assembly of the laser unit, to precisely adjust the laser beam of the laser unit so that the laser beam illuminates the phosphor. Converter exactly as previously calculated applies and thus suitable for fluorescence brings. Characterized in that at least one of the optical elements defined according to the invention is mounted pivotably about at least one spatial axis, the adjustment of the adjustable optics can be conveniently done after assembly of the essential parts of the vehicle headlight, whereby the craftsmanship, which is necessary for adjusting the lens, relatively low is.
    Preferably, the collimator is designed as an optical collimator lens mounted in a holding element, wherein the holding element is pivotably mounted about at least one spatial axis. In this preferred case, the adjustment of the adjustable optics via the adjustment of a laser diode associated collimator lens, wherein the laser beam can take place in the sequence directly or with the interposition of one or more optical elements and optionally an oscillating mirror on the phosphorus converter. In the context of the present invention, a collimator lens can also be understood as meaning a system comprising a plurality of lenses, wherein a plurality of lenses in a collimator are used to correct aberrations or chromatic aberrations.
    According to another preferred embodiment, the collimator is designed as a parabolic mirror mounted in a holding element, wherein the holding element is mounted pivotably about at least one spatial axis. In this preferred case, the adjustment of the adjustable optics via the adjustment of one of the laser diode associated parabolic mirror, which acts as a collimator, wherein the laser beam in the sequence meet directly or with the interposition of one or more optical elements and optionally an oscillating mirror on the phosphorus converter can.
    As already defined, one of the abovementioned optionally interposed optical elements can be a deflecting mirror of the adjustable optical system, it being possible according to a preferred embodiment of the present invention for the deflecting mirror to be fixed to a holding element pivotally mounted about at least one spatial axis.
    According to a particularly preferred embodiment of the present invention, the collimator is directed to the deflection mirror and the holding element for the collimator is pivotally mounted about at least one spatial axis.
    In order to ensure a particularly flexible adjustment of the optics, the invention is further developed to the effect that the retaining element is pivotally mounted about two spatial axes. In this preferred embodiment, the light emitted by the laser diode can be directed both in the height and the side, so that all inaccuracies can be compensated.
    In the context of the present invention, it is provided that the collimator lens in the range of +/- 3 ° starting from a neutral position about the respective spatial axis is pivotable, which should be sufficient for the compensation of manufacturing tolerances of the individual elements of a laser unit.
    For easy adjustability of the lens holder and thus the lens, the invention is preferably further developed such that the holding element has a receiving part for the collimator or for the deflecting mirror and in each case acting on the receiving part lever for pivoting the support member to each have a spatial axis. The direction in which the lever protrudes, and the pivot point of the pivotal fixing of the holding element define a pivot axis which is perpendicular to the lever. By actuating the lever, the pivoting of the holding element and thus of the collimator or of the deflection mirror takes place around the spatial axis thus defined.
    Preferably, the invention is further developed such that the holding element has two acting on the receiving part lever for pivoting the support member about two mutually at a right angle spatial axes, whereby the adjustment of the laser beam in the height direction and in the lateral direction are easily and quickly accomplished by operating the lever can.
    Regardless of whether only one lever or two levers engage the receiving part for the lens, the laser unit according to a preferred embodiment can be further developed such that the receiving part and the lever (s) are integrally formed with each other. In the simplest case, the said elements are in this case designed as injection-molded parts.
    A particularly favorable embodiment of the present invention is when each an elastically deformable spring element between a lever and a mounting element for the holding part is arranged and that the / each lever is pressed by a set screw against the mounting member / are. By arranging a deformable spring element between a lever and the mounting element, the lever assumes a defined position against the respective adjusting screw and can be pressed by actuating the adjusting screw against the deformable, in particular elastic, support or spring element. With an appropriate choice of the thickness of the spring element, the required pivoting of the collimator or the holding member can be ensured to the respective spatial axis, which is ensured by the spring action of the spring element at any time a provision of the lever, if this should be necessary for subsequent readjustment.
    According to a preferred embodiment of the present invention, the lever (s) or the respective adjusting screw (s) cooperate with one another by mediating a spherical shape. Such a spherical shape ensures good force transmission regardless of the degree of pivoting of the receiving part and can be formed with the same effect on the screw or on the lever.
    A particularly favorable configuration of the laser unit according to the invention is achieved when the set screw / the set screws are rotatably mounted in a set on the mounting element bearing plate is / are, as this corresponds to a preferred embodiment of the present invention. In addition to the storage of the screws allows the provision of such a bearing plate and the pivotal fixing of the retaining element with the levers when it is inserted into a corresponding recess in the mounting element and then covered by means of the bearing plate. After fixing the bearing plate, for example by screwing or gluing, all movable parts of the laser unit according to the invention are combined and can be mounted on the headlight.
    In order to ensure a permanent fixation of the set position of the holding element or the optical elements defined according to the invention, the invention is preferably further developed such that the screw / the screws rotatably fixed / are, whereby the permanent fixation without a final gluing the lens holder possible becomes. In a preferred manner, the invention is further developed to the effect that the set screw / screws are rotatably fixed in each case by means of a lock nut / are.
    In addition, it is of course still conceivable that the holding element is fixed with a bond, as corresponds to a preferred embodiment of the present invention.
    The laser diodes are high-performance components that produce large amounts of heat when operating in vehicle headlights. For this reason, cooling devices must normally be associated with the laser diodes used in order to distribute and dissipate the large and occasionally occurring heat quantities. The invention is therefore preferably developed to the effect that a heat sink is fixed on the bearing plate having recesses for the screw / screws, which allows a large-area contact of the heat sink with the prone to heat components, however, the adjustability of the lens holder or the Collimator lens is not affected by the screws. While the invention has been described with reference to a laser unit comprising a laser diode associated with the laser diode, adjustable optics with optical elements, it will be apparent to those skilled in the art that such laser units are usually combined to form a laser module comprising a plurality of such laser units.
    According to a preferred embodiment of the present invention, such a laser module comprises three laser units according to the invention, wherein the mounting units of the laser units are combined to form a common beam path in which deflecting mirrors are fixed.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. In this show
    FIG. 1 shows a perspective overall view of essential parts of a vehicle headlight with a plurality of laser units according to the invention,
    FIG. 2 shows a plan view of the laser module according to the invention of FIG. 1 with three laser units,
    3 is a sectional view of the laser module according to the invention of FIG. 2 along the line A - A, FIG.
    FIG. 4 is a sectional view of a laser unit according to the invention according to a preferred embodiment,
    FIG. 5 a sectional view of a laser unit according to the invention according to a further preferred embodiment,
    FIG. 6 is a sectional view of a laser unit according to the invention in accordance with a further preferred embodiment,
    7 is a perspective view of a holding element according to the prior invention,
    Figures 8a and 8b are further sectional views of a preferred embodiment of the present invention and
    Figure 9 shows a detail of an alternative embodiment of the present invention.
    In Fig. 1, 1, a laser module of the sake of clarity, not shown vehicle headlamp referred to. In the present preferred case, the laser module 1 has three laser units 2 whose assembly units 3 are combined and form a common beam path 4. In the case of the laser module 1 according to the invention, each laser unit 2 emits laser light which emerges from the beam path 4. The laser light can be conducted via a possibly oscillatingly mounted mirror 5 to a phosphor converter or a light conversion means 6, which is thereby excited to emit visible light. This visible light can be projected by means of a lens 7 on a road, not shown. In this case, a light image recorded by the laser on the light conversion medium is projected. In addition to such a dynamic system, static systems are common, which will be discussed below in connection with other figures.
    The laser units 2 have, in addition to the mounting units 3, a respective bearing plate 8 and in each case a heat sink 9 fixed thereon, which can dissipate the heat which originates from the laser diodes 11 to the environment. The determination of the heat sink 9 is effected by means of screws 10 which are received in corresponding recesses on the heat sink 9.
    In the plan view of Fig. 2, the heatsink 9 and the screws 10 are recognizable again. In this illustration, the laser diodes 11 can be seen, which are mounted in this example by means of the adjusting screws 12 pivotable about two mutually at a right angle spatial axes.
    3, it can be seen that each laser diode 11 is assigned a collimator, in the present case in the form of a collimator lens 13, as part of an adjustable optical system. The collimator lens 13 is mounted in a holding element 14, which by means of the lever 15 which is integrally formed with a receiving part 16 and which can be pivoted by tightening and loosening the screw 12 against the spring action of the elastic spring member 17 in the direction of the double arrow 18. Typically, a pivoting of +/- 3 ° can be brought about, wherein the degree of pivoting can be adjusted by the skilled person by simple technical measures according to the needs. Not shown in this section, but in combination with the preceding figures recognizable to those skilled in the art, a further lever 15 '(Fig. 7) is arranged at right angles to the lever 15 on the holding element 14, and in the same way as the lever 15 to The holding element 14 and holding elements 14 are pivotally mounted between a mounting member 3 and a bearing plate 8, wherein the adjusting screws 12 are rotatably received in the bearing plate 8 and can be fixed in a rotationally fixed manner, not shown. After the collimator 13, which is adjustable according to the invention, the light can be deflected by means of a fixed deflecting mirror 20 in order to emerge from the beam path 4 in the sequence. In the present example, three laser beams are used which are modeled after the so-called "Knife Edge Combining Method". must be aligned as close to each other and exactly parallel to each other in order to image at the light conversion means a homo Nes photo. This clearly requires a high precision of adjustment of the optical system.
    According to the preferred variant of the present invention shown in Fig. 4, instead of the collimator 13 and the deflecting mirror 20 may be pivotally mounted about two spatial axes, in this figure equivalent parts have been given the same reference numerals. The deflecting mirror 20 may in this case also be formed in one piece with the receiving part 16 or be cast in this.
    5, neither beam path nor deflecting mirrors are provided and the light of the laser diode 11 is directed directly onto the phosphor converter 6, which partially converts the laser light and thus provides a white light source for the subsequent optical system , The optical system may, as shown in Fig. 5, be a reflector but also a lens or a combination of these elements. Again, like-acting parts are provided with the same reference numerals.
    FIG. 6 shows an inventive and preferred variant in which the adjustable optics is formed by a parabolic mirror 22, which is mounted pivotably in the described manner. Here, the collimating of the divergent laser light thus occurs via a parabolic mirror 22, whereby this parabolic mirror 22 can interact with a collimator lens or another optical element or system in order to bring about focusing of the laser light after collimation. For example, a combination with a hyperbolic mirror and a correspondingly designed lens would be conceivable in order to reduce the space requirement.
    Fig. 7 shows the holding member 14 with the collimator 13, the laser diode 11 and the two levers 15 and 15 'and two deformable spring element 17 and 17'. It can be seen that the two levers 15 and 15 'are at right angles to each other and engage the receiving part 16 and in the present case are formed integrally therewith. The screws 12 are able to press the levers in the direction of the double arrows 23 and 23 ', this against the resistance of the deformable spring elements 17 and 17', so that a reversible pivoting of the holding element 14 and thus of the collimator 13 takes place.
    In Figures 8a and 8b, the pivoting of the receiving part 16 is once again illustrated. When the adjusting screw is screwed in in the direction of the arrow 23 '(FIG. 8a), the lever 15 is moved under compression of the spring element 17, which results in a pivoting of the receiving part 16 and thus of the collimator 13 in the direction of the arrow 18'. On the other hand, by the spring action of the spring element 17 is a pivoting of the receiving part 16 and the collimator 13 in the opposite sense, i. in the sense of the arrow 18 ", when the set screw 12 in the direction of the arrow 23 " is unscrewed. In the detail view of FIG. 8 b, it can be clearly seen that the lever 15 has a spherical shape 24 in order to ensure optimum power transmission from the adjusting screw 12 to the lever 15. Clearly, a spherical formation 24 'may also be provided on the adjusting screw 12, as shown in Fig. 9, to achieve the same effect of good power transmission from the adjusting screw 12 to the lever 15.
    权利要求:
    Claims (19)
    [1]
    1. Laser unit for a vehicle headlight with a laser diode and a laser diode associated, adjustable optics with optical elements, characterized in that at least one of the optical elements selected from the group consisting of a collimator (13, 22) and a deflection mirror (20) is mounted pivotably about at least one spatial axis.
    [2]
    2. Laser unit according to claim 1, characterized in that the collimator as a in a holding element (14) mounted, optical collimator lens (13) is formed, wherein the holding element (14) is pivotally mounted about at least one spatial axis.
    [3]
    3. Laser unit according to claim 1, characterized in that the collimator as a in a holding element (14) mounted parabolic mirror (22) is formed, wherein the holding element (14) is mounted pivotably about at least one spatial axis.
    [4]
    4. Laser unit according to one of claims 1 to 3, characterized in that the deflecting mirror (20) is fixed to a at least one spatial axis pivotally mounted holding element (4).
    [5]
    5. Laser unit according to claim 2 to 4, characterized in that the collimator (13, 22) is directed to the deflection mirror (20) and the holding element (14) for the collimator (13, 22) is mounted pivotably about at least one spatial axis.
    [6]
    6. Laser unit according to one of claims 2 to 5, characterized in that the holding element (14) is pivotally mounted about two spatial axes.
    [7]
    7. Laser unit according to one of claims 2 to 6, characterized in that the holding element (14) is pivotally mounted about two mutually at a right angle spatial axes.
    [8]
    8. Laser unit according to one of claims 2 to 7, characterized in that the holding element (14) has a receiving part (16) for the collimator (13, 22) or for the deflecting mirror (20) and in each case one on the receiving part (16). engaging lever (15, 15 ') for pivoting the retaining element (14) by a respective spatial axis.
    [9]
    9. Laser unit according to one of claims 2 to 8, characterized in that the holding element (14) has two engaging on the receiving part lever (15, 15 ') for pivoting the holding element (14) about two mutually at right angles to spatial axes.
    [10]
    10. Laser unit according to claim 8 or 9, characterized in that the receiving part (16) and the / the lever (15,15 ') are integrally formed with each other.
    [11]
    11. Laser unit according to one of claims 8 to 10, characterized in that in each case an elastically deformable spring element (17) between a lever (15, 15 ') and a mounting element (3) for the holding part (14) is arranged and that the / the levers (15, 15 ') can each be pressed by an adjusting screw (12) against the mounting element (3).
    [12]
    12. A laser unit according to claim 11, characterized in that the / the lever (15,15 ') and the respective / n screw / n mediate a mediated spherical formation (24, 24') cooperate.
    [13]
    13. Laser unit according to claim 11 or 12, characterized in that the adjusting screw / the adjusting screws (12) is rotatably received in a mounted on the mounting element (3) bearing plate (19) is / are.
    [14]
    14. Laser unit according to one of claims 11 to 13, characterized in that the adjusting screw / the adjusting screws (12) rotatably fixed is / are.
    [15]
    15. Laser unit according to one of claims 1 to 14, characterized in that the adjusting screw / the adjusting screws (12,12 ') each rotatably fixed by means of a lock nut.
    [16]
    16. Laser unit according to one of claims 1 to 15, characterized in that the holding element (14) is fixed with a bond.
    [17]
    17. Laser unit according to one of claims 13 to 16, characterized in that a cooling body (9) on the bearing plate (19) is fixed, which has recesses for the adjusting screw / screws (12).
    [18]
    18. Laser module (1) comprising a plurality of laser units (2) according to one of claims 1 to 15.
    [19]
    19. Laser module (1) according to claim 18 comprising three laser units (2) according to one of claims 1 to 16, wherein the mounting units of the laser units are combined to form a common beam path, are defined in the deflection mirror.
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    同族专利:
    公开号 | 公开日
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    CN106103189B|2018-05-11|
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    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50032/2014A|AT515375B1|2014-01-20|2014-01-20|Laser unit for a vehicle headlight and laser module|ATA50032/2014A| AT515375B1|2014-01-20|2014-01-20|Laser unit for a vehicle headlight and laser module|
    PCT/AT2015/050016| WO2015106303A1|2014-01-20|2015-01-20|Laser unit for a vehicle headlight|
    EP15709400.4A| EP3096980B1|2014-01-20|2015-01-20|Laser unit for a vehicle headlight|
    CN201580015144.7A| CN106103189B|2014-01-20|2015-01-20|Laser cell for vehicle head lamp|
    US15/112,289| US10131268B2|2014-01-20|2015-01-20|Laser unit for a vehicle headlight|
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