CN117287658A - Lens optics for flexible positioning of light sources - Google Patents

Lens optics for flexible positioning of light sources Download PDF

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Publication number
CN117287658A
CN117287658A CN202210819551.5A CN202210819551A CN117287658A CN 117287658 A CN117287658 A CN 117287658A CN 202210819551 A CN202210819551 A CN 202210819551A CN 117287658 A CN117287658 A CN 117287658A
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CN
China
Prior art keywords
collimator
light source
optics
cylinder
light
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
CN202210819551.5A
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Chinese (zh)
Inventor
C·迈尔
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.)
ZKW Group GmbH
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ZKW Group GmbH
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Filing date
Publication date
Application filed by ZKW Group GmbH filed Critical ZKW Group GmbH
Publication of CN117287658A publication Critical patent/CN117287658A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/56—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for illuminating registrations or the like, e.g. for licence plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
    • B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/60—Projection of signs from lighting devices, e.g. symbols or information being projected onto the road
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An illumination device for a motor vehicle, comprising a light source mounted on a light source carrier, a projection optical device associated with the light source, the projection optical device being provided for deflecting light emitted by the light source into a predetermined region or into a plurality of predetermined regions, wherein the projection optical device has a first focal point, a so-called inner focal point, which is on a side facing the light source, and a second focal point, a so-called outer focal point, which is on a side of the projection device facing away from the light source, wherein the light source is arranged on a side of the inner focal point of the projection optical device in a distance D1 from the inner focal point and in a distance D2 from the projection optical device, wherein the light source is in a larger distance from the inner focal point than the projection optical device, and wherein a transmission optical device is arranged between the light source and the inner focal point of the projection device, wherein the transmission optical device images the light source such that the inner focal point of the projection optical device is in a transmission image of the light source.

Description

Lens optics for flexible positioning of light sources
Technical Field
The invention relates to a lighting device for a motor vehicle, comprising a light source mounted on a light source carrier (Lichtquellentraeger), a projection optical device associated with the light source, which is provided for deflecting light emitted by the light source into a predefined region or into predefined regions, wherein the projection optical device has a first focal point (so-called inner focal point) on a side facing the light source and a second focal point (so-called outer focal point) on a side of the projection device facing away from the light source.
The invention further relates to a lighting system for a motor vehicle, comprising at least one such lighting device.
The invention further relates to a license plate arrangement for a motor vehicle, comprising a vehicle license plate and the above-mentioned lighting device.
Finally, the invention also relates to a motor vehicle having at least one such license plate device.
Background
In general, in projection systems for lighting devices of motor vehicles, the light source is arranged in a first focal point of the projection optics, and the light beam emitted by the light source is focused in a further second focal point on the other side of the projection device or in a further region around the second focal point on the other side of the projection device, and in this way the light distribution is projected in a region in front of or behind the motor vehicle or beside the vehicle in which the lighting device is mounted.
However, it is often desirable not to be so limited in developing lighting devices for motor vehicles.
Disclosure of Invention
The object of the present invention is to illustrate a solution for this problem.
This object is achieved by means of an illumination device as mentioned at the outset in that the light source is arranged according to the invention on one side of the inner focal point of the projection optics in a distance D1 from the inner focal point and in a distance D2 from the projection optics, wherein the light source is located in a larger distance from the inner focal point than the projection optics, and wherein a Transfer optics (Transfer-Optikvorrichtung) is arranged between the light source and the inner focal point of the projection optics, wherein the Transfer optics images the light source as a Transfer image such that the inner focal point of the projection optics is located in the Transfer image of the light source.
With the invention it is possible to position the light source outside the inner focus of the projection optics, in particular in a larger distance from the projection optics than those in the inner focus, and still image the light source clearly or as clearly as desired via the projection optics, as it is when in the inner focus of the projection optics.
Here, the light source is positioned in a focal point of the delivery optics and an image of the light source is imaged into a second focal point of the delivery optics. The image of the light source may thus be produced in the inner focus of the projection optics, which image is then imaged by the projection optics (as if the light source were in the inner focus).
For example, the light source and thus the position of the light source is defined by the light emission center of the light source, such that the expression "the light source is (substantially) in focus" may be equivalent to "the light emission center of the light source is in focus".
The mentioned distances are measured here along the optical axis or main emission axis of the light source (the inner focal point is also on this axis) with respect to the intersection of this axis with the projection optics.
For example, it is provided that the transmission optics comprise two collimator optics and a cylinder arranged between the two collimator optics, the cylinder comprising at least one cylinder-shaped body, wherein the cylinder comprises two bottom surfaces (first bottom surface and second bottom surface) and at least one outer circumferential surface connecting the two bottom surfaces, wherein the collimator optics each comprise a transparent collimator body having a first end section (so-called light-collecting section) and a second end section, wherein the light-collecting section has a collimator focal point lying outside the collimator body, and wherein the collimator body is configured such that, when light beams originating from a light source arranged in the collimator focal point impinge on the light-collecting section, the light beams enter the collimator body, are oriented in parallel in the collimator body and travel to the second end section, wherein the second end section comprises a flat surface (end section surface) oriented such that the parallel light beams are perpendicularly incident on the end section, wherein one of the two collimator optics (first collimator optics) is arranged such that the light source is located directly opposite the first end section, the cylinder-shaped collimator body is arranged opposite the second end section, wherein the light source is arranged opposite the first end section and the cylinder-shaped, and the cylinder-shaped body is arranged opposite the first end section, and the cylinder-shaped so that the light source is parallel to the first end section is arranged opposite the first end section, and the inner focus of the projection optics substantially coincides with the collimator focus of the light collection section of the second collimator body.
The light beam emitted by the light source in the first collimator focus of the delivery optics is focused into or around the second collimator focus in such a way that an image of the light source is formed, wherein the second collimator focus is in the image of the light source. After the second collimator focal point coincides with the inner focal point of the projection device, the projection device may image the image of the light source as if the light source were actually in the focal point of the projection device.
For example, it is provided that the column comprises exactly one column-shaped body, wherein the column-shaped body is configured in the form of a right column and the two bottom surfaces extend parallel to each other.
Here, it is a technical solution that is simple in structure and easy to calculate.
In a further embodiment, it is provided that the cylinder comprises two cylinder bodies, wherein the cylinder bodies, that is to say the cylinder axes of the two cylinder bodies, are inclined to one another by an angle β which is not equal to 0 °, in particular greater than 90 °.
This more complex solution allows a more flexible positioning of the light source; in particular, the light source need not be positioned in line opposite its projection optics.
In this embodiment, it is preferably provided that the angle β between the cylinder axes is greater than twice the critical angle for total reflection.
The critical angle for total reflection is derived from the refractive index of the transparent material.
It is ensured that the conditions for total reflection are fulfilled in the transition region of the two cylindrical bodies, so that as little as possible light loss as a result of the light beam exiting from the cylinder occurs.
For example, beta >2arcsin (1/n), where n is the refractive index of the material of the cylinder, is applicable. N=1.49 is applicable in the case of PMMA, beta is equal to or greater than 85 degrees, and n=1.585 is applicable in the case of PC, beta is equal to or greater than 80 degrees.
For example, the two cylindrical bodies 40a,40b form a planar total reflection surface in their transition region, which has the shape of an ellipse whose center is located in the intersection of two cylinder axes that are inclined to one another. The minor axis length b of the ellipse corresponds to the cylinder radius r, while the length a of the major axis is given by a=r/(cos (beta/2)). The cylinder radii r of the two cylindrical bodies 40a,40b (that is to say in the feed region and in the image region) are equal.
Advantageously, the end section of the first collimator optics and the first base of the cylinder adjoin one another, in particular lie against one another overall, and the first collimator body and the cylinder are preferably constructed in one piece.
In principle, the distance between the limiting collimator optics and the cylinder surface can be >0, however, it is preferred that the first collimator optics and the cylinder lie against one another and are particularly preferably constructed in one piece from the same material (or a material with the same refractive index), since then no undesired deflection occurs when the light beam leaves and/or enters the interface.
However, it is also possible that the first collimator optics and the cylinder are made of materials with different refractive indices. In this embodiment, the parallelism tolerance of the plane of the end section face of the first collimator optics and the bottom face of the cylinder is better than 0.0125mm, for example. The second collimator optic is constructed of the same material as the first collimator optic; the associated planes preferably meet the same tolerances.
It is likewise advantageous if the end section of the second collimator optics and the second base of the cylinder adjoin one another, in particular lie against one another overall, and preferably the second collimator body and the cylinder are of one-piece construction.
As already mentioned, it may in principle be expedient for the transparent collimator body and the cylinder to be composed of the same material.
In the previously described one-piece embodiment of the transfer optics consisting of one material, the base surface of the cylinder or the end section surface of the collimator body is only a virtual, i.e. purely imaginary surface, and not an actual material-structured surface.
It may be provided that each collimator body has an optical axis, wherein the optical axis of the collimator body is situated perpendicularly on its end section plane and preferably extends through the collimator focus of the collimator body.
The optical axis coincides with the main radiation direction in the center of the light source (e.g. LED light source). This is achieved, for example, in the case of a planar light source carrier, in that the surface normal to the light source carrier runs parallel to this axis. This optical axis then preferably coincides with the optical axis of the projection optics if the cylinder comprises exactly one cylindrical, in particular straight, body. In this case, the optical axis of the second collimator body also preferably coincides with the optical axis of the first collimator body.
However, it may also be provided that the main radiation direction of the light source is inclined with respect to the optical axis, such that the main radiation direction extends at an angle of not equal to 0 ° with respect to the optical axis. In this case, the image of the light source is also imaged obliquely. This embodiment is particularly interesting in the case of small angles of inclination (e.g. <10 °).
It is advantageously provided that at least one, preferably each collimator body is rotationally symmetrical about its optical axis.
The cylinder has an "optical" axis or height if the cylinder comprises exactly one cylindrical body and preferably the axis of the collimator body coincides with this axis.
Preferably, it is provided that at least one, preferably each collimator body has an end section plane which coincides with the bottom surface of the cylinder facing it.
It is particularly preferred that the two collimator bodies are identically constructed.
In this connection it is furthermore preferably also provided that the two collimator bodies are arranged such that they are arranged mirror-image to one another with respect to the mirror plane, or if the mirror plane is an orthogonal plane to the optical axis of one of the two collimator bodies and the optical axis of the other collimator body coincides with the optical axis of the other collimator body or if they coincide, such that the two collimator bodies are arranged mirror-image to one another with respect to the mirror plane.
In this way, the image 1:1 of the light source corresponds to the light source.
As mentioned at the outset, the invention further relates to a lighting system for a motor vehicle, comprising at least one lighting device, wherein the lighting system further comprises a lighting unit which is configured to generate one or more light distributions, wherein the lighting unit comprises at least one lighting unit light source and lighting unit optics, wherein the lighting unit is arranged approximately between a light source carrier and a cover plate of the lighting system, wherein the at least one lighting unit light source is arranged on the light source carrier, and wherein the lighting unit, starting from the light source carrier, has a stretch in the direction of the cover plate, which is dimensioned such that the at least one light source is not arranged in the focal point of its projection device, but is arranged in a distance which is greater than the distance of the inner focal point of the projection device from the projection device.
In this case, for example, the planar light source carrier preferably supports not only the at least one lighting unit light source but also the light source(s) of the lighting device, in particular all light sources being arranged on one side of the light source carrier.
For example, there is provided use of such a lighting device in a tail lamp.
It may be provided that the at least one projection optics is arranged in a cover disc of the illumination system, for example made in one piece with the cover disc.
In general, the projection optics may be a projection lens. The lens effect of the projection optics is achieved, for example, by the design of the cover disc, such as by, for example, corresponding partial curvature(s) on the inner and/or outer side of the cover disc.
For example, it may be provided that the lighting unit is a floor projection device and that the one or more light distributions comprise one or more floor projections.
The invention further relates to a license plate lighting device for a motor vehicle, comprising a vehicle license plate and the lighting device described above, wherein the lighting device is arranged with respect to the license plate in such a way that one or more areas, into which light emitted by the projection means of at least one light source is radiated, are on the license plate, such that the license plate is at least partially, preferably completely, illuminated by the light of the at least one light source when the at least one light source is switched on.
Drawings
The invention is explained in more detail below with reference to the drawings. Wherein:
figure 1 shows the license plate arrangement in a view from above,
figure 2 shows the license plate device of figure 1 in a perspective cross-sectional view,
figure 3 shows an embodiment of the lighting device according to the invention with a transmission optics,
figure 4 shows another embodiment of the delivery optics,
figure 5 shows another embodiment of a delivery optical device for small tilt angles,
fig. 6 shows a schematic ground projection produced with the license plate device of fig. 1 or fig. 2.
Detailed Description
Examples of lighting arrangements according to the invention are discussed in more detail below with the aid of license plate arrangement 200. However, this is only a particularly preferred application, and in principle the lighting device according to the invention can also be used in other vehicle lamps, for example in tail lamps, or in vehicle headlamps.
Fig. 1 and 2 show a license plate arrangement 200 for a motor vehicle, comprising a vehicle license plate 300 and two lighting arrangements 100. The lighting device 100 is arranged in this case with respect to the license plate 300 in such a way that light is radiated into one or more regions on the license plate 300, so that the license plate 300 is at least partially, preferably completely, illuminated by light when the lighting device 100 (or at least one of them) is switched on.
In particular, the license plate device 200 comprises a lighting system 400, which in the present example has two lighting devices 100. In addition, the lighting system 400 comprises a lighting unit 10, which is set up for generating one or more light distributions LV, wherein the lighting unit 10 comprises at least one lighting unit light source 11 and lighting unit optics 12a,12b,12c, wherein the lighting unit 10 is arranged substantially between the cover disc 5 and the light source carrier 2 of the lighting system 400.
In the specific example three lighting units 10 are provided, each with a light source 11 (e.g. an LED or comprising one or more LEDs) and lighting unit optics 12, which in turn comprise a lighting unit collimator 12a, an MLA12b ("Micro Lens Array") and a deflection mirror 12c, respectively.
The deflection mirror 12c interacts with its MLA12b in such a way that, for example, the generated light distribution or the generated light distributions LV are ground projections BP, i.e. light distributions or light patterns which are imaged onto the ground, in particular onto the traffic lane, as is schematically shown in fig. 6 (which shows a motor vehicle 500 with a license plate arrangement 200).
The lighting unit light sources 11 are arranged on a preferably flat light source carrier 1.
As already mentioned above, the illumination system 400 or the license plate device 200 comprises two illumination devices 100 with which the license plate 300 is illuminated. The preferably planar light source carrier 1 carries not only the light source 11 but also the light source 1.
Such a lighting device 100 for a motor vehicle, which is shown in detail in fig. 3, comprises a light source 2 (for example one LED or one or more LEDs), which is mounted on a light source carrier 1, in particular on the light source carrier 1 for a lighting unit light source 11, in particular on the same side. The light source 2 is associated with projection optics 3 which are provided to divert the light emitted by the light source 2 into a predefined region or into a plurality of predefined regions.
In the example shown, the projection optics 3 of the illumination device 100 are arranged in the cover disk 5 of the illumination system 400, for example made in one piece with the cover disk 5 or constructed in the cover disk 5.
In general, the projection optics may be a projection lens. The lens effect of the projection optics is for example achieved by the design of the cover disc, such as by corresponding local curvature(s) e.g. of the inner and/or outer side of the cover disc, in order to preferably achieve as uniform a surface illumination of the license plate 300 as possible.
The projection optics 3 have a first focus PF1 (so-called inner focus) on the side facing the at least one light source 2 and a second focus PF2 (so-called outer focus) on the side of the projection means 3 facing away from the at least one light source 2.
Typically, the light source 2 will be arranged at the inner focus PF1 of the projection device 3. It is desirable in this case to arrange all the light sources 11,2 on a common carrier 1, however, this results in the problem that, due to the extension of the individual illumination units 10, the light sources 2 of the illumination device 100 can no longer be arranged at the inner focus PF1, but rather at a greater distance from the projection device 3.
After the light source 2 is arranged on one side of the inner focus PF1 of the projection optics 3 in the distance D1 from the inner focus PF1 and in the distance D2 from the projection optics 3, the light source 2 is therefore arranged in a larger distance (D2 > (D2-D1)) than the projection optics 3 in the inner focus PF1, and the transfer optics 4 is arranged between the light source 2 and the inner focus PF1 of the projection optics 3, wherein the transfer optics 4 images the light source 2 as a transfer image 2a in such a way that the inner focus PF1 of the projection optics 3 is in the transfer image 2a of the light source 2.
The mentioned distances are measured here along the optical axis or main radiation axis of the light source (the inner focal point also lying on this axis) with respect to the intersection of this axis with the projection optics.
In the specific embodiment according to fig. 3, it is provided that the transmission optics 4 comprise two collimator optics 50,60 and a cylinder 40 arranged between the two collimator optics 50,60, which is formed by a cylinder body 40a, wherein the cylinder 40 or the cylinder body 40a comprises two bottom surfaces (first and second bottom surfaces 41, 42) and at least one outer circumferential surface 43a connecting the two bottom surfaces 41, 42.
Thus, the cylindrical body 40a is configured in the form of a right cylinder, with the two bottom surfaces 41,42 extending parallel to each other.
The collimator optics 50,60 each comprise a transparent collimator body 510,610 having a first end section (so-called light-collecting section 511,611) and a second end section 512,612, wherein the light-collecting section 511,611 has collimator foci F1, F2 outside the collimator bodies 510,610, and wherein the collimator bodies 510,610 are configured such that, when light beams emitted from light sources arranged in the collimator foci F1, F2 impinge on the light-collecting section 511,611, they enter the collimator bodies 510,610, are oriented in parallel in the collimator bodies 510,610 and propagate as parallel light beams PS to the second end section 512,612, wherein the second end section 512,612 comprises flat faces (end section faces 512a,612 a) which are oriented such that the parallel light beams impinge perpendicularly on the end section faces 512a,612 a.
One of the two collimator optics (first collimator optic 50) is arranged such that its collimator focus F1 of the collimator body 510 is at the light source 2.
The post 40 is arranged next to the end section 512a of the first collimator optics 50, wherein the first bottom face 41 of the post 40 is opposite to and extends parallel to the end section 512a of the first collimator body 51, and wherein the second collimator optics 60 is arranged next to the post 40 such that the second bottom face 42 of the post 40 is opposite to and extends parallel to the end section 612a of the second collimator body 61 and the inner focus PF1 of the projection optics 3 substantially coincides with the collimator focus F2 of the light collecting section 611 of the second collimator body 610.
"substantially coincident" here generally (without limitation to the present example) means that the two foci actually coincide or are at most so far apart from each other that they are in the image 2a produced by the light source 2.
The light beam emitted by the light source 2 in the first collimator focal point F1 of the delivery optics 4 is focused in or around the second collimator focal point F2 in such a way that an image 2a of the light source 2 is formed, wherein the second collimator focal point F2 is located within this image 2a of the light source 2. After the second collimator focal point F2 substantially coincides with the inner focal point PF1 of the projection device 3, the projection device 3 may image the image 2a of the light source 2 as if the light source 2 were actually in the inner focal point PF1 of the projection device 3.
As shown in the example according to fig. 3, the end section 512a of the first collimator optics 50 and the first bottom face 41 of the cylinder 40 rest against one another in an overall manner, and the first collimator body 510 and the cylinder 40 are preferably constructed from the same material in one piece.
Similarly, it is advantageously applicable that the end section 612a of the second collimator optics 60 and the second base 42 of the cylinder 40 adjoin one another, in particular lie against one another in an overall manner, and that the second collimator body 610 and the cylinder 40 are preferably constructed in one piece and from the same material.
The end sections 512a,612a of the collimator bodies 510,610 coincide with the bottom surfaces 41,42 of the cylinder 40 facing them.
Thus, the two collimators 50,60 and the cylindrical body 40a are members of one material, in particular a transparent material. In the described and illustrated embodiment of the transmission optics made of one material, the base surface of the cylinder or the end section surface of the collimator body is only a virtual (i.e. purely imaginary) surface, not an actual, material-made surface.
Each collimator body 510,610 has an optical axis O1, O2, wherein the optical axis O1, O2 of the collimator body 510,610 lies perpendicularly on its end section face 512a,612a and preferably extends through the collimator focus F1, F2 of the collimator body 510, 610.
Typically, the optical axis O1 coincides with the main radiation direction of the center of the light source 2. The optical axis O2 preferably coincides with the optical axis OP of the projection optics 3.
The column 40a has an "optical" axis O3 or height, and the direction of propagation of the parallel beam PS corresponds to the direction of the axis O3. In the present case, the axis O1, O2 of the collimator body preferably coincides with this axis O3.
It is advantageously provided that the collimator bodies 510,610 are rotationally symmetrical about their respective optical axes O1, O2, and that the two collimator bodies 510,610 are identically configured.
It is generally preferred to arrange the two collimator bodies 510,610 such that they are arranged mirror-image to each other with respect to the mirror plane, or such that the two collimator bodies are arranged mirror-image to each other with respect to the mirror plane if the mirror plane is an orthogonal plane to the optical axis O1 of one of the two collimator bodies 510 and the optical axis O2 of the other collimator body 610 coincides with the optical axis O1 of the other collimator body 510 or if they coincide.
In this way, the image 2a1:1 of the light source corresponds to the shape of the light source 2 or the light source.
Fig. 4 shows an alternative embodiment of the transmission optics 4, which as shown in fig. 3 comprises two collimators 50,60 and a cylinder 40. The statements made above in connection with fig. 3 also apply in their entirety to the embodiment shown in fig. 4, with the difference that the cylindrical bodies 40a,40b (outer circumferential surfaces 43a,43 b), that is to say the cylinder axes or heights O3a, O3b of the two cylindrical bodies 40a,40b, are inclined to one another by an angle β which is not equal to 0 °, in particular greater than 90 °.
The axes O1, O3a preferably coincide, as do the axes O2, O3b and OP (the optical axes of the projection optics).
This more complex solution allows a more flexible positioning of the light source; in particular, the light source need not be positioned in line opposite its projection optics.
Preferably, the angle β between the cylinder axes O3a, O3b is set to be greater than twice the critical angle for total reflection. It is ensured that the conditions for total reflection are fulfilled in the transition region of the two cylindrical bodies, so that as little as possible light loss as a result of the light beam leaving the cylinder occurs.
For example, beta >2arcsin (1/n), where n is the refractive index of the material of the cylinder 40, is suitable. N=1.49 applies in the case of PMMA, thus β being no less than 85 °, n=1.585 in the case of PC, thus β being no less than 80 °.
For example, the two cylindrical bodies 40a,40b form a planar total reflection surface E in their transition region, which has the shape of an ellipse whose center is at the intersection of two mutually inclined cylinder axes. The total reflection surface E passes through the surface normalTo determine that the surface normal is the same as the angular symmetry line of the cylinder axes O3a and O3 b. The minor axis length b of the ellipse corresponds to the cylinder radius r, while the length a of the major axis is given by a=r/(cos/. Beta./2.) the cylinder radii r of the two cylindrical bodies 40a,40b (that is to say in the feed region and in the image region) are equal
Similar to fig. 3, the main radiation directions of the light sources may also coincide with the optical axis O1 of the collimator 50 in this embodiment or be inclined to each other at an angle of more than 0 °.
In this connection, fig. 5 shows an embodiment in which the main radiation direction HR of the light source is inclined with respect to the optical axis O1 of the collimator 50, so that the main radiation direction extends to the optical axis O1 at an angle different from 0 °. In this case, the image of the light source is also imaged obliquely. Furthermore, the optical axis O2 of the second collimator 60 is inclined with respect to the optical axis OP of the projection device 3 (typically at the same angle as between the axis O1 and the main radiation direction HR of the light source).
The preferred (tilt) angle γ between the main radiation direction HR and the optical axis O1 is greater than 165 °. This tilt allows for a more free choice of the location and condition of the light source circuit board; this then leads to a shortening of the (axial) mounting depth/length, but to an increase of the transverse mounting width.

Claims (18)

1. A lighting device (100) for a motor vehicle, comprising a light source (2) mounted on a light source carrier (1), projection optics (3) associated with the light source (2), which are provided for deflecting light emitted by the light source (2) into a predetermined region or regions, wherein the projection optics (3) have a first focal point (PF 1), a so-called inner focal point (PF 1), which is on the side facing the light source (2), and a second focal point (PF 2), a so-called outer focal point (PF 2), which is on the side of the projection means (3) facing away from the light source (2),
it is characterized in that the method comprises the steps of,
the light source (2) is arranged in a distance D1 from the inner focus (PF 1) and in a distance D2 from the projection optics (3) on one side of the inner focus (PF 1) of the projection optics (3), wherein the light source (2) is located in a larger distance from the inner focus (PF 1) than from the projection optics (3),
and wherein a transmission optical device (4) is arranged between the light source (2) and an inner focus (PF 1) of the projection device (3), wherein the transmission optical device (4) images the light source (2) as a transmission image (2 a) in such a way that the inner focus (PF 1) of the projection optical device (3) is located in the transmission image (2 a) of the light source (2).
2. The lighting device according to claim 1, wherein the delivery optics (4) has two collimator optics (50, 60) and a cylinder (40) arranged between the two collimator optics (50, 60), the cylinder comprising at least one cylindrical body (40 a,40 b), wherein the cylinder (40) comprises two bottom surfaces, a first and a second bottom surface (41, 42) and at least one outer circumferential surface (43 a,43 b) connecting the two bottom surfaces (41, 42),
wherein the collimator optics (50, 60) each comprise a transparent collimator body (510, 610) having a first end section, a so-called light collecting section (511,611) and a second end section (512,612),
wherein the light collecting section (511,611) has a collimator focus (F1, F2) outside the collimator body (510, 610), and wherein the collimator body (510, 610) is configured such that, when light beams emitted from light sources arranged in the collimator focus (F1, F2) impinge on the light collecting section (511,611), these light beams enter the collimator body (510, 610), are oriented in parallel in the collimator body (510, 610) and propagate to the second end section (512,612), wherein the second end section (512,612) comprises a planar face, end section face (512 a,612 a), which is oriented such that the parallel light beams impinge perpendicularly on the end section face (512 a,612 a),
wherein one of the two collimator optics, the first collimator optic (50), is arranged such that the light source (2) is approximately in a collimator focus (F1) of a light collecting section (511) of the collimator body (510),
and wherein the post (40) is arranged next to a second end section (512 a) of the first collimator optics (50), wherein a first bottom surface (41) of the post (40) is opposite to and extends parallel to the end section (512 a) of the first collimator body (51),
and wherein the second collimator optics (60) are arranged next to the at least one cylinder (40) in such a way that a second bottom face (42) of the cylinder (40) is opposite and extends parallel to an end section face (612 a) of the second collimator body (61), and
the inner focus (PF 1) of the projection optics (3) and the collimator focus (F2) of the light collection section (611) of the second collimator body (610) substantially coincide.
3. The lighting device according to claim 2, wherein the pillar (40) comprises exactly one pillar-shaped body (40 a), wherein the pillar-shaped body (40 a) is configured in the form of a right pillar, and the two bottom surfaces (41, 42) extend parallel to each other.
4. The lighting device according to claim 2, wherein the cylinder (40) comprises two cylindrical bodies (40 a,40 b), wherein the cylinder axes (O3 a, O3 b) of the cylindrical bodies (40 a,40 b), that is to say the two cylindrical bodies (40 a,40 b), are inclined to each other by an angle β not equal to 0 °, in particular greater than 90 °.
5. The lighting device according to claim 4, wherein the angle β between the cylinder axes (O3 a, O3 b) is greater than twice the critical angle for total reflection.
6. The lighting device according to any one of claims 2 to 5, wherein the end section surface (512 a) of the first collimator optics (50) and the first bottom surface (41) of the cylinder (40) adjoin each other, in particular lie against each other in an overall manner, and preferably the first collimator body (510) and the cylinder (40) are constructed in one piece.
7. The lighting device according to any one of claims 2 to 6, wherein the end section surface (612 a) of the second collimator optics (60) and the second bottom surface (42) of the cylinder (40) adjoin each other, in particular lie against each other in an overall manner, and preferably the second collimator body (610) and the cylinder (40) are constructed in one piece.
8. The lighting device according to any one of claims 2 to 7, wherein the transparent collimator body (510, 610) and the cylinder are composed of the same material.
9. The lighting device according to any one of claims 2 to 8, wherein each collimator body (510, 610) has an optical axis (O1, O2), wherein the optical axis (O1, O2) of the collimator body (510, 610) is perpendicular to its end section plane (512 a,612 a) and preferably extends through a collimator focus (F1, F2) of the collimator body (510, 610).
10. The lighting device according to claim 9, wherein at least one, preferably each collimator body (510, 610) is rotationally symmetrical about its optical axis (O1, O2).
11. The lighting device according to any one of claims 2 to 10, wherein the end section face (512 a,612 a) of at least one, preferably each collimator body (510, 610) coincides with the bottom face (41, 42) of the cylinder (40) facing it.
12. The lighting device according to any one of claims 2 to 11, wherein the two collimator bodies (510, 610) are identically configured.
13. The lighting device according to claim 12, wherein the two collimator bodies (510, 610) are arranged such that they are arranged mirror-image to each other with respect to a mirror plane, or if the mirror plane is an orthogonal plane with respect to the optical axis (O1) of one of the two collimator bodies (510) and the optical axis (O2) of the other collimator body (610) coincides with the optical axis (O1) of the other collimator body (510) or if they coincide, such that the two collimator bodies are arranged mirror-image to each other with respect to the mirror plane.
14. Lighting system (400) for a motor vehicle, comprising at least one lighting device (100) according to any one of claims 1 to 13, wherein the lighting system (400) additionally comprises a lighting unit (10) which is configured to generate one or more light distributions (LV), wherein the lighting unit (10) comprises at least one lighting unit light source (11) and lighting unit optics (12 a,12b,12 c), wherein the lighting unit (10) is arranged approximately between a cover plate (5) of the lighting system (400) and a light source carrier (1), wherein the at least one lighting unit light source (11) is arranged on the light source carrier (1), and wherein the lighting unit (10) has an extension from the light source carrier (2) in the direction of the cover plate (5) which is dimensioned such that the at least one light source (2) is not arranged in the focal point of its projection device (3) but rather is arranged at a larger distance from the projection device (PF) than in the focal point of the projection device (1) of the projection device (3).
15. The illumination system according to claim 14, wherein the at least one projection optics (3) is arranged in a cover disc (5) of the illumination system (400), e.g. made in one piece with the cover disc (5).
16. The lighting system according to claim 14 or 15, wherein the lighting unit (10) is a floor projection device and the one or more light distribution patterns (LV) comprise one or more floor projections (BP).
17. License plate arrangement for a motor vehicle, comprising a vehicle license plate (300) and an illumination system (400) according to any of claims 14 to 16, wherein the illumination device (100) is arranged in relation to the license plate (300) such that one or more areas into which light emitted by the projection device (3) of the at least one light source (2) is emitted are on the license plate (300) such that the license plate (300) is at least partially, preferably completely illuminated by the light of the at least one light source (2) when the at least one light source (2) is switched on.
18. A motor vehicle with at least one lighting device according to any one of claims 1 to 13 or with at least one lighting system according to any one of claims 14 to 16 or with at least one license plate device according to claim 17.
CN202210819551.5A 2022-06-20 2022-07-13 Lens optics for flexible positioning of light sources Pending CN117287658A (en)

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Application Number Priority Date Filing Date Title
DE102022115250.2 2022-06-20
DE102022115250.2A DE102022115250A1 (en) 2022-06-20 2022-06-20 LENS OPTICS FOR FLEXIBLE POSITIONING OF LIGHT SOURCES

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3039630A1 (en) 2015-07-28 2017-02-03 Valeo Vision LIGHTING SYSTEM FOR MOTOR VEHICLE PROJECTOR
EP3848626B1 (en) 2020-01-08 2023-03-08 Lumileds LLC Front-lighting system for vehicle headlamp
EP3839324A1 (en) 2019-12-16 2021-06-23 ZKW Group GmbH Lighting device for a motor vehicle headlight

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