Illumination device for a motor vehicle headlamp

Abstract

A lighting device (1) for a motor vehicle headlamp, comprising a light emitting device, an optical element (2) for forming a light distribution, wherein the optical element (2) has a focal point, a holding device (3) holding the position of the optical element (2) relative to the light emitting device, wherein the holding device (3) has a compensation element (4) connecting the optical element (2) with the holding device (3), wherein the compensation element (4) has a first end section (4a) and a second end section (4b), wherein the first end section (4a) is connected with the optical element (2) and the second end section (4b) is connected with the holding device (3), wherein the compensation element (4) is constructed such that it has a temperature-dependent longitudinal extension in a direction (X), wherein the compensation element (4) is connected with the optical element (2) and arranged such that the optical element (2) is pivoted and / or moved relative to the light image plane depending on the temperature such that the focal point of the optical element (2) lies in the light image plane.

Description

Technical Field

[0001] This invention relates to a lighting device for a motor vehicle headlight, comprising:

[0002] - A light-emitting device for generating and radiating light, wherein the light-emitting device is configured to generate a light image located in a light image plane.

[0003] - An optical element for forming a light distribution from an optical image generated by a light-emitting device, wherein the optical element is arranged behind the optical image plane in the direction of light propagation and has a focal point and an optical axis, wherein the focal point is located between the optical element and the light-emitting device, and the optical axis extends between the optical element and the light-emitting device, wherein the optical element is configured to image the optical image in the form of a light distribution into a traffic space.

[0004] - A holding device configured to hold the position of the optical element relative to the light-emitting device, preferably held such that, in the cut-off state of the light-emitting device, the focal point of the optical element is located outside the light image plane.

[0005] The present invention also relates to a motor vehicle headlight including a lighting device. Background Technology

[0006] Illuminating devices for motor vehicle headlights are known in the prior art. These devices typically have a light-emitting element and an imaging system that images the light from the light-emitting element into the traffic space. Disadvantageously, the imaging system heats up due to temperature, particularly from the heat generated by the light-emitting element, resulting in undesirable thermal expansion of the imaging system. This can lead to imaging malfunctions that alter the light image generated by the imaging system.

[0007] To minimize temperature-induced stretching of components in lighting devices, existing technologies typically employ cooling or highly efficient thermal insulation of the light-emitting or imaging devices. However, this requires costly and complex cooling or insulation systems. Summary of the Invention

[0008] The object of this invention is to mitigate or eliminate the disadvantages of the prior art. Therefore, this invention particularly aims to provide a lighting device in which compensation for temperature-induced stretching of the lighting device is improved.

[0009] This objective is achieved by a lighting device having the following characteristics:

[0010] A lighting device for a motor vehicle headlight, comprising:

[0011] - A light-emitting device for generating and radiating light, wherein the light-emitting device is configured to generate a light image located in a light image plane.

[0012] - An optical element for forming a light distribution from the light image generated by the light-emitting device, wherein the optical element is arranged behind the light image plane in the light propagation direction and has a focal point and an optical axis, wherein the focal point is located between the optical element and the light-emitting device, and the optical axis extends between the optical element and the light-emitting device, wherein the optical element is configured to image the light image in the form of a light distribution into a traffic space.

[0013] - A holding device configured to hold the position of the optical element relative to the light-emitting device such that, in the off state of the light-emitting device, the focal point of the optical element is located outside the light image plane.

[0014] Its features are,

[0015] The holding device has at least one compensation element that connects the optical element to the holding device. The compensation element has a first end section and a second end section, wherein the first end section is connected to the optical element and the second end section is connected to the holding device. The compensation element is made of a material configured such that it has a temperature-dependent longitudinal extension in a direction parallel to the optical axis of the optical element. The compensation element is connected to the optical element and configured to allow the optical element to pivot and / or move relative to the light image plane according to temperature, such that in an on-state where the light-emitting device has a higher temperature than in a cut-off state, the focal point of the optical element is located within the light image plane.

[0016] According to the present invention, the holding device has at least one compensation element that connects an optical element to the holding device, wherein the compensation element has a first end section and a second end section, wherein the first end section is connected to the optical element and the second end section is connected to the holding device, wherein the compensation element is made of a material configured such that the compensation element has a temperature-dependent longitudinal extension in a direction (X), wherein the direction (X) extends parallel to the optical axis of the optical element, wherein the compensation element is connected to the optical element and configured such that the optical element pivots and / or moves relative to the optical image plane according to temperature such that the focal point of the optical element is located in the optical image plane.

[0017] This results in the following advantage: the shift of the focal point of an optical element caused by temperature-induced stretching can be compensated for or offset. The optical element has a focal point or focal line, wherein, when the focal point is located within the optical image plane, the optical element images the desired or required light distribution into the traffic space. When the light-emitting device is in the on state, temperature-induced stretching of the optical element can occur, thereby causing the focal point to shift out of the optical image plane. The compensating element has such a temperature-dependent (or temperature-induced) length variation or longitudinal stretching variation (the length of the compensating element is particularly variable and can increase in the direction (X) as the temperature increases and decrease in the direction (X) as the temperature decreases), making it possible, in particular, to compensate for the thermally induced shift of the focal point using the corresponding length variation. The pivoting or movement of the optical element thus resists the thermally induced shift of the focal point, such that the optical element pivots and / or moves relative to the light-emitting device or the optical image plane, and therefore, after the movement or pivoting, the focal point is located within the optical image plane. In the off state of the light-emitting device, the focal point may be located outside the optical image plane, and in the on state of the light-emitting device (where the temperature is higher than in the off state), the focal point may be located within the optical image plane due to the pivoting and / or movement of the optical element. The movement of the focal point can be achieved by temperature-induced stretching or temperature-induced compression of a compensating element. The compensating element can be configured to pivot and / or move the optical element such that the focal point is always located within the optical image plane, particularly at the current temperature, during temperature changes, or thereafter. In other words, the compensating element can be constructed and configured to pivot and / or move the optical element continuously or dynamically during continuous temperature changes (e.g., preferably continuous temperature increases or decreases). The material of the compensating element can be selected such that temperature-dependent length changes of the compensating element compensate for the movement of the focal point due to the heating of the optical element. A holding device can be arranged between the light-emitting device and the optical element. The light-emitting device may have a light source (e.g., an LED or laser light source) and may include devices configured to generate an optical image in the optical image plane. Optical elements can image an optical image into a traffic space in the form of a light distribution (e.g., low beam distribution). Compensation elements can be constructed such that temperature changes, preferably continuous temperature changes, cause a preferred continuous change in the length of the compensation element. The length of the compensation element is, in particular, a function of temperature. The length change due to temperature changes can be, for example, 0.1 mm to 1 mm, preferably 0.2 mm to 0.8 mm per 10°C. Compensation elements can include, for example, metals or plastics, preferably aluminum, die-cast zinc, polycyclohexyl dimethyl terephthalate, polyphenylene ether, polyamide, polyvinyl chloride, or polypropylene.

[0018] The optical element can be configured such that pivoting and / or movement due to temperature-dependent variations in the longitudinal extension of the compensating element includes pivoting and / or movement of the optical element about the y-axis and / or about the z-axis, and / or along the direction (X), wherein the y-axis is orthogonal to the z-axis, and the y-axis and z-axis are each orthogonal to the direction (X). The direction (X) may be oriented in the direction of light radiation and / or in the direction of travel of a motor vehicle with a lighting device. The y-axis and z-axis are preferably located within a plane of symmetry of the optical element, wherein the plane of symmetry is orthogonal to the direction (X). The optical element may, for example, include a lens, wherein the plane of symmetry forms the plane of symmetry of the lens.

[0019] The retaining device can be configured such that it has at least one engaging element, wherein the engaging element has at least two locking recesses arranged spaced apart from each other in a direction (X), wherein the compensating element has a locking element configured to engage with one of the locking recesses of the engaging element, wherein engagement of the locking element in the first locking recess defines a first position of the optical element relative to the light-emitting device, and engagement of the locking element in the second locking recess defines a second position of the optical element relative to the light-emitting device, wherein the optical element pivots and / or moves relative to the light-emitting device compared to the second position. In the first position, the optical element may have a first distance from the light-emitting device or the light image plane, and in the second position, a second distance. In the first position, the optical element may have a first angle with the light-emitting device or the light image plane, and in the second position, a second angle. During the transition of the locking element from the first locking recess to the second locking recess, preferably, movement of the optical element from the first distance to the second distance and / or from the first angle to the second angle occurs. The compensating element and the retaining device can also be connected to each other in a secure, rigid, or inseparable manner, wherein the connection between the compensating element and the retaining device can be established, for example, by means of laser welding.

[0020] The optical element can be configured such that, compared to a second position, it pivots and / or moves relative to the light-emitting device about the y-axis and / or about the z-axis, and / or moves along the direction (X), wherein the y-axis is orthogonal to the z-axis and both the y-axis and z-axis are orthogonal to the direction (X). The y-axis and z-axis are preferably located within a plane of symmetry of the optical element, wherein the plane of symmetry is orthogonal to the direction (X).

[0021] It can be configured such that the pivoting and / or movement of the optical element from the first position to the second position is greater than the pivoting and / or movement of the optical element caused by the temperature-dependent longitudinal extension of the compensation element. This results in the advantage that, by utilizing the pivoting and / or movement of the optical element from the first position to the second position, coarse or large compensation can be made for the shift of the focal point caused by temperature variations in the optical element, and fine or small compensation can be made for the shift of the focal point by utilizing the temperature-dependent longitudinal extension of the compensation element.

[0022] The optical element can be configured to have a first fixed region and a second fixed region, wherein the first fixed region and the second fixed region are arranged diametrically. A compensation element is connected to the optical element at the first fixed region, and another compensation element is connected to the optical element at the second fixed region. The compensation element is connected to and engaged with a holding device at a first engaging element, and the other compensation element is connected to and engaged with the holding device at a second engaging element. This provides the advantage that, for example, the compensation element allows for pivoting of the optical element about the y-axis, and the other compensation element allows for pivoting of the optical element about the z-axis.

[0023] The locking element can be configured as a locking nose that extends substantially along the y-axis or z-axis away from the surface of the compensation element.

[0024] The compensation element can be configured as a rod. In particular, the compensation element can be configured as an elongated shape. The compensation element preferably has a length that is at least 5 times, preferably 10 times, and particularly preferably more than 15 times the width and height of the compensation element.

[0025] The holding device can be configured as a hollow body, comprising a light guide channel and a sheath surrounding the light guide channel. The sheath has a first end section and a second end section opposite to the first end section. At least one end section has at least one engaging element. Preferably, a light-emitting device is disposed at the first end section, and an optical element is disposed at the second end section. The holding device can also be configured as a hollow light guide, with the light-emitting device disposed at the first end of the light guide and the optical element disposed at the second end of the light guide.

[0026] It can be configured such that light from the light-emitting device radiates from the light-emitting device through the light guide channel to the optical element, wherein preferably, the sheath is constructed to be opaque.

[0027] The engaging element can be configured to have three or more locking recesses. Therefore, coarse compensation for focus movement caused by temperature can be performed in three or more stages. Two, three, or more locking recesses are particularly arranged at a uniform spacing relative to each other.

[0028] The optical element can be configured as a lens. The lens can be, for example, a spherical, aspherical, convex, biconvex, concave, biconcave lens, or a freeform lens.

[0029] An aperture can be arranged between the light-emitting device and the optical element, wherein preferably, the aperture is located in the light image plane.

[0030] The compensating element can be configured to have a first thermal elongation coefficient, the optical element to have a second thermal elongation coefficient, and the holding device to have a third thermal elongation coefficient, wherein the first thermal elongation coefficient is different from both the second and third thermal elongation coefficients. The second and third thermal elongation coefficients can be the same or different, respectively. The first thermal elongation coefficient can be between 0.03K. -1 and 0.25K -1 Between, preferably between 0.06K -1 and 0.2K -1 between.

[0031] According to the present invention, a motor vehicle headlight including a lighting device is provided.

[0032] In the context of this specification, the terms “above,” “below,” “horizontal,” and “vertical” should be understood as descriptions of the orientation of the lighting device when it is positioned in its normal use position, for example, after it has been installed in a motor vehicle. Attached Figure Description

[0033] The present invention will now be explained in more detail with reference to preferred embodiments, but the present invention should not be limited to the embodiments described. Wherein:

[0034] Figure 1 A detailed view of the lighting device according to the present invention is shown;

[0035] Figure 2 Further detailed views of the lighting fixture are shown;

[0036] Figure 3 A detailed view of the compensation element is shown;

[0037] Figures 4a-4c A horizontal sectional view showing three states of the lighting device; and

[0038] Figures 5a-5c Vertical sectional views of the lighting device in three different states are shown. Detailed Implementation

[0039] Figure 1A detailed view of an illumination device 1 for a motor vehicle headlight is shown. For simplicity, unimportant elements are not shown. The illumination device 1 includes a light-emitting device (not shown) for generating and radiating light. The light-emitting device is configured to generate a light image located in a light image plane. Furthermore, the illumination device 1 includes an optical element 2 for forming a light distribution from the light image generated by the light-emitting device. The optical element 2 is arranged behind the light image plane in the light propagation direction and has a focal point and an optical axis. In the illustrated embodiment, the optical element 2 is constructed as a lens. The focal point of the optical element 2 is located between the optical element 2 and the light-emitting device, and the optical axis extends between the optical element 2 and the light-emitting device. The optical element 2 is configured to image the light image into the traffic space in the form of a light distribution (e.g., in the form of a low beam or high beam).

[0040] The illumination device 1 includes a holding device 3, which is specifically configured to hold the optical element 2 in position relative to the light-emitting device such that, in the off state of the light-emitting device, the focal point of the optical element 2 is preferably located outside the light image plane. In an alternative embodiment, the holding device 3 may be configured to hold the optical element 2 in position relative to the light-emitting device such that, in the off state of the light-emitting device, the focal point of the optical element 2 is located within the light image plane.

[0041] The holding device 3 has at least one compensation element 4 that connects the optical element 2 to the holding device 3. The compensation element 4 has a first end section and a second end section, wherein the first end section is connected to the optical element 2 and the second end section is connected to the holding device 3. The compensation element is particularly rod-shaped.

[0042] The compensation element 4 is made of a material constructed such that it has a temperature-dependent longitudinal extension in the direction X, which extends parallel to the optical axis of the optical element 2. The compensation element 4 is connected to the optical element 2 and configured such that the optical element 2 pivots and / or moves relative to the optical image plane according to temperature, such that the focal point of the optical element 2 is preferably always located within the optical image plane.

[0043] The pivoting and / or movement of optical element 2 due to temperature-dependent variations in the longitudinal extension of compensation element 4 may include pivoting of optical element 2 about the y-axis and / or about the z-axis and / or movement along the direction X. The y-axis may be orthogonal to the z-axis, and the y-axis and z-axis may be orthogonal to the direction X, respectively.

[0044] As in Figure 2 and Figure 3As can be seen in detail, the retaining device 3 has at least one engaging element 6, wherein the engaging element 6 has at least two locking recesses arranged spaced apart from each other in the X direction. The compensating element 4 has a locking element 5 configured to engage with one of the locking recesses of the engaging element 6. The locking element 5 may be configured as a locking nose that extends substantially orthogonally away from the surface of the compensating element 4. The engaging element 6 may have three or more locking recesses; in the illustrated embodiment, the engaging element 6 has five locking recesses.

[0045] The engagement of the locking element 5 in the first locking recess defines a first position of the optical element 2 relative to the light-emitting device, and the engagement of the locking element 5 in the second locking recess defines a second position of the optical element 2 relative to the light-emitting device. The optical element 2 can pivot and / or move relative to the light-emitting device compared to the first and second positions. The optical element 2 can pivot and / or move relative to the light-emitting device about the y-axis and / or about the z-axis relative to the light-emitting device compared to the first and second positions, wherein the y-axis is orthogonal to the z-axis, and the y-axis and z-axis are respectively orthogonal to the X-axis.

[0046] The pivoting and / or movement of optical element 2 from the first position to the second position is greater than the pivoting and / or movement of optical element 2 caused by the temperature-dependent longitudinal extension of compensation element 4.

[0047] The optical element 2 has a first fixed region and a second fixed region, wherein the first fixed region and the second fixed region are arranged in diameter. A compensation element 4 may be connected to the optical element 2 at the first fixed region, and another compensation element 4 may be connected to the optical element 2 at the second fixed region, wherein the compensation element 4 is connected to and engaged with the holding device 3 at the first engaging element 6, and the other compensation element 4 is connected to and engaged with the holding device at the second engaging element 6.

[0048] like Figures 4a-4c and Figures 5a-5c As shown, the holding device 3 is preferably constructed as a hollow body, which includes a light guide channel and a sheath surrounding the light guide channel, wherein the sheath has a first end section and a second end section opposite to the first end section. At least one end section has at least one engaging element 6, wherein preferably, a light-emitting device is arranged at the first end section and an optical element is arranged at the second end section.

[0049] Light from the light-emitting device radiates from the light-emitting device through the light guide channel to the optical element 2, wherein preferably, the sheath is constructed to be opaque.

[0050] An aperture can be arranged between the light-emitting device and the optical element 2, wherein the aperture is preferably located in the light image plane.

[0051] Lighting device 1 in Figures 4a-4c and Figures 5a-5c The embodiment shown has four compensation elements 4, wherein the optical element 2 has four corners, and at each corner or corner region of the optical element 2, the compensation element 4 is connected to the optical element 2. Figures 4a-4c and Figures 5a-5c The illustrations are greatly simplified and are purely schematic. The retaining device 3 has four engaging elements 6 that interact with or correspond to the compensating element 4, wherein each engaging element 6 interacts with the compensating element 4.

[0052] Figures 4a-4c A top view showing the horizontal cross-section of the lighting device 1 in three states is shown.

[0053] Figure 4a A first state is shown, in which the optical element 2 is not pivoted relative to the light image plane or the light source 7. In this state, the light source 7 is preferably cut off and does not emit light. The compensation element 4, which connects the optical element 2 to the holding device 3, has a first length in the first state.

[0054] Figure 4b The second state is shown, in which the optical element 2 is pivoted relative to the light image plane or the light source 7. In this state, the light source 7 is preferably turned on and emits light. Due to the heat emitted by the light source 7, the length of the compensation element 4 changes, particularly its longitudinal extension. The compensation element 4 has a second length in the second state.

[0055] The materials of the four compensation elements 4 are chosen such that the thermally induced longitudinal elongation of each compensation element 4 is such that the optical element 2 (in the direction of light propagation) pivots to the left. Therefore, the optical element 2 is positioned on the right side in the direction of light propagation (…). Figure 4b The compensation element 4 (located at the upper left of the optical element 2) is positioned on the left side of the optical element 2 in the direction of light propagation. Figure 4b The compensation element 4 (located in the lower left corner) has a larger thermally induced length change compared to the other element.

[0056] exist Figure 4c In the middle, it is arranged on the right side of optical element 2 in the direction of light propagation ( Figure 4c The compensation element 4 (located in the upper left corner) is positioned on the left side of the optical element in the direction of light propagation. Figure 4c The compensation element 4 (located in the lower left corner) has a smaller thermally induced length change compared to the other element. This causes the optical element to pivot to the right.

[0057] Figures 4a-4c The dashed line shown in the figure indicates the direction of light propagation radiated by the lighting device 1.

[0058] Using optical element 2 Figure 4b and Figure 4c The pivot shown in the diagram allows light, especially that radiated into the traffic space by the lighting device 1, to pivot in the horizontal plane, thereby enabling, for example, turn signals.

[0059] Figures 5a-5c A side view of a vertical cross section is shown for three states of the lighting device 1.

[0060] Figure 5a The following state is shown, in which the optical element 2 is not pivoted relative to the light image plane or the light source 7. Similar to... Figure 4a In this state, the light source 7 is cut off and does not emit light. In this embodiment, two light sources 7 are provided. Any number of light sources 7 can also be provided. The compensation element 4, which connects the optical element 2 to the holding device 3, has a first length in this state.

[0061] exist Figure 5b and Figure 5c The pivoting state is described in detail. Figure 5b In the process, the thermally induced length change of the compensation element 4 causes the optical element 2 to pivot upwards (viewed in the direction of light propagation). Figure 5c In the process, the thermally induced length change of the compensation element 4 causes the optical element 2 to pivot downwards. The optical element 2 in... Figure 5b and Figure 5c The pivot shown can change or adjust the vertical height of the light radiated from the lighting device into the traffic space.

[0062] Figures 5a-5c The dashed line shown in the figure indicates the direction of light propagation radiated by the lighting device 1.

Claims

1. A lighting device (1) for a motor vehicle headlight, comprising: - A light-emitting device for generating and radiating light, wherein the light-emitting device is configured to generate a light image located in a light image plane. - An optical element (2) for forming a light distribution from the light image generated by the light-emitting device, wherein the optical element (2) is arranged behind the light image plane in the light propagation direction and has a focal point and an optical axis, wherein the focal point is located between the optical element (2) and the light-emitting device, and the optical axis extends between the optical element (2) and the light-emitting device, wherein the optical element (2) is configured to image the light image in the form of a light distribution into the traffic space. - A holding device (3) is configured to hold the position of the optical element (2) relative to the light-emitting device such that, in the cut-off state of the light-emitting device, the focal point of the optical element (2) is located outside the light image plane. Its features are, The holding device (3) has at least one compensation element (4) that connects the optical element (2) to the holding device (3). The compensation element (4) has a first end section and a second end section, wherein the first end section is connected to the optical element (2) and the second end section is connected to the holding device (3). The compensation element (4) is made of a material configured such that the compensation element (4) has a temperature-dependent longitudinal extension in the direction (X), wherein the direction (X) extends parallel to the optical axis of the optical element (2). The compensation element (4) is connected to the optical element (2) and configured to pivot and / or move the optical element (2) relative to the light image plane according to temperature, such that in the on state of the light-emitting device, the focal point of the optical element (2) is located in the light image plane, and in the on state there is a higher temperature compared to the off state.

2. The lighting device (1) according to claim 1, wherein, The pivoting and / or movement of the optical element (2) due to temperature-dependent changes in the longitudinal extension of the compensation element (4) includes the pivoting and / or movement of the optical element (2) about the y-axis and about the z-axis, wherein the y-axis is orthogonal to the z-axis and the y-axis and the z-axis are orthogonal to the direction (X).

3. The lighting device (1) according to claim 1 or 2, wherein, The holding device (3) has at least one engaging element (6), wherein the engaging element (6) has at least two locking recesses arranged spaced apart from each other in the direction (X), wherein the compensation element (4) has a locking element (5) configured to engage with one of the locking recesses of the engaging element (6), wherein engagement of the locking element (5) in the first locking recess defines a first position of the optical element (2) relative to the light-emitting device, and engagement of the locking element (5) in the second locking recess defines a second position of the optical element (2) relative to the light-emitting device, wherein the optical element (2) pivots and / or moves relative to the light-emitting device in the first position compared to the second position.

4. The lighting device (1) according to claim 3, wherein, The optical element (2) pivots and / or moves relative to the light-emitting device about the y-axis and about the z-axis and along the direction (X) at the first position compared to the second position, wherein the y-axis is orthogonal to the z-axis and the y-axis and the z-axis are orthogonal to the direction (X).

5. The lighting device (1) according to claim 4, wherein, The pivoting and / or movement of the optical element (2) from the first position to the second position is greater than the pivoting and / or movement of the optical element (2) due to the temperature-dependent longitudinal extension of the compensation element (4).

6. The lighting device (1) according to claim 3, wherein, The optical element (2) has a first fixed region and a second fixed region, wherein the first fixed region and the second fixed region are arranged in diameter, wherein the compensation element (4) is connected to the optical element (2) at the first fixed region, and an additional compensation element is connected to the optical element (2) at the second fixed region, wherein the bonding element (6) includes a first bonding element and a second bonding element, wherein the compensation element (4) is connected to the holding device (3) and bonded at the first bonding element, and the additional compensation element is connected to the holding device and bonded at the second bonding element.

7. The lighting device (1) according to claim 4, wherein, The locking element (5) is configured as a locking nose, which extends substantially along the y-axis or the z-axis away from the surface of the compensation element (4).

8. The lighting device (1) according to claim 1 or 2, wherein, The compensation element is constructed in the shape of a rod.

9. The lighting device (1) according to claim 1 or 2, wherein, The holding device (3) is constructed as a hollow body, the hollow body including a light guide channel and a sheath surrounding the light guide channel, wherein the sheath has a first end section and a second end section opposite to the first end section, wherein at least one of the first end section and the second end section of the sheath has the at least one engaging element (6).

10. The lighting device (1) according to claim 9, wherein, The light from the light-emitting device radiates from the light-emitting device through the light guide channel onto the optical element.

11. The lighting device (1) according to claim 3, wherein, The engagement element (6) has three or more locking recesses.

12. The lighting device (1) according to claim 1 or 2, wherein, The optical element (2) is constructed as a lens.

13. The lighting device (1) according to claim 1 or 2, wherein, An aperture is arranged between the light-emitting device and the optical element (2).

14. The lighting device (1) according to claim 1 or 2, wherein, The compensation element (4) has a first thermal elongation coefficient, the optical element (2) has a second thermal elongation coefficient, and the holding device (3) has a third thermal elongation coefficient, wherein the first thermal elongation coefficient is different from the second thermal elongation coefficient and the third thermal elongation coefficient.

15. The lighting device (1) according to claim 9, wherein, The light-emitting device is arranged at the first end section of the sheath, and the optical element is arranged at the second end section of the sheath.

16. The lighting device (1) according to claim 10, wherein, The sheath is constructed to be opaque.

17. The lighting device (1) according to claim 13, wherein, The aperture is located in the optical image plane.

18. A motor vehicle headlight comprising a lighting device (1) according to any one of the preceding claims.

Images