WO2020043579A1

WO2020043579A1 - Optical lens for a laser scanner for a driving assistance system

Info

Publication number: WO2020043579A1
Application number: PCT/EP2019/072426
Authority: WO
Inventors: Ho-Hoai-Duc Nguyen
Original assignee: Valeo Schalter Und Sensoren Gmbh
Priority date: 2018-08-28
Filing date: 2019-08-22
Publication date: 2020-03-05
Also published as: DE102018120925A1

Abstract

The invention relates to an optical lens for a laser scanner (10), wherein the optical lens (22) is embodied as a biconical lens, wherein the biconical lens is embodied as a biconical hybrid lens (24), wherein the biconical hybrid lens (24) also comprises a glass body (26) which is provided with a polymer coating (28). The invention further relates to a laser scanner (10) comprising such a biconical hybrid lens (24).

Description

Optical lens for a laser scanner for a driving support system

The present invention relates to an optical lens for a laser scanner. The present invention relates in particular to a biconical lens with a

improved construction. Furthermore, the present invention relates to a laser scanner for a driving support system of a motor vehicle and a

Driving support system comprising such a laser scanner. The present invention relates in particular to a laser scanner which has reduced scattered radiation and thereby reduces the risk to persons or animals who are in the detection range of the laser scanner.

Laser scanners are widely used for motor vehicle driving support systems. In particular, laser scanners are used to detect the surroundings of a vehicle and, for example, to detect objects, such as objects, animals or people, in order to determine their spatial position and their distance from the vehicle.

It can be problematic, especially with laser scanners, that they should often be operated with a high intensity in order to detect the reflections of the objects in a suitable manner. It can basically happen that

People or animals that are in the detection area of the laser scanner, through which strong emitted laser radiation can be blinded. Thus, a compromise to be observed with laser scanners is often to adjust the intensity of the emitted laser beams in such a way that they enable sufficient detection of objects, but at the same time keep or rule out the danger to animals or people.

Since eye safety is therefore of great importance for laser scanners, laser scanners currently have to be certified with laser class 1 in order to enable operation in road traffic.

US 2017/0108582 A1 describes a photoelectric sensor. In the case of such a sensor, a lens is provided which is positioned on a light-emitting element and is designed as a biconical lens. In particular, it is provided that the

Bending radii can be set according to a specific pattern. US 2017/059838 A1 also describes a light-emitting device, in particular for a camera. It is provided that such a device is equipped with a biconical lens. The biconical lens is made of a polymer.

Such solutions known from the prior art can, however, offer further potential for improvement, in particular with regard to a balanced one

Property profile of the laser scanner.

It is the object of the present invention to at least partially overcome the disadvantages known from the prior art. It is in particular the object of the present invention to provide a solution by means of which a laser scanner can be provided which, with an advantageous property profile, has a low risk of glare for animals and / or people.

According to the invention, the object is achieved by a lens with the features of claim 1 and by a laser scanner with the features of claim 5

Driving support system with the features of claim 9 and by a vehicle with the features of claim 10. Preferred embodiments of the invention are described in the subclaims, in the description or in the figures, further in the subclaims or in the description or in the figures

Features described or shown individually or in any combination can represent an object of the invention if the context does not clearly indicate the opposite.

An optical lens for a laser scanner is proposed, the optical lens being designed as a biconical lens, the biconical lens being designed as a biconical hybrid lens, the biconical hybrid lens having a glass body which is provided with a polymer coating.

Such a lens allows in particular the generation of a laser scanner that has a low risk of glare with a lens that has a balanced property profile. A lens for a laser scanner is thus described. Such a lens can fundamentally be arranged at different points in a beam path in a laser scanner and in particular serve to influence laser radiation. Thus, the can be positioned between a radiation source and an exit of the laser radiation from the laser scanner, as will be described in greater detail below.

The lens described here is designed as a biconical lens. A biconical lens is to be understood in particular as a lens of this type which has a curvature in two planes which are different from one another and in particular are arranged at right angles to one another. For example, a curvature can be formed in the horizontal and vertical planes, so that radiation passing through the lens, in particular laser radiation from a laser scanner, can focus both in the vertical and in the horizontal plane. The biconical lens is thus a conical lens with radii in two planes. It can be provided that the first curvature defines the focus length of the hybrid lens and that the second curvature defines aspherical parameters.

It is particularly provided that the biconical lens is designed as a biconical hybrid lens. A biconical hybrid lens is to be understood in particular as a lens of this type which is formed from at least two materials. The lens is in particular designed such that a first material forms a first curvature and that a second material different from the first material forms a second curvature of the biconical lens.

The first material is glass and the second material is a plastic or a polymer, it being provided in particular that the biconical hybrid lens has a glass body which is provided with a polymer coating.

This configuration in particular can have significant advantages over the solutions from the prior art.

Firstly, such a biconical lens can focus the laser radiation in the beam path of a laser scanner particularly effectively. This means that When passing or hitting a large number of components of the laser scanner, there is an exact optical influencing of the laser radiation, which in turn can enable particularly defined radiation properties.

In addition, the use of highly focused laser radiation, particularly when used in a laser scanner, can significantly reduce the occurrence of scattered radiation and thus the danger to animals and humans.

Particularly with regard to using a biconical hybrid lens, the property profile of the lens can be very balanced.

With regard to the configuration of the hybrid lens, it can be advantageous that the glass body defines the focus length of the hybrid lens and that the polymer coating defines aspherical parameters. Thus, it is provided in particular that the polymer coating is not a mere coating and thus roughly follows the curvature of the glass lens, but that the glass body and the polymer coating define different optical properties of the biconical lens. This can be advantageous with regard to the optical properties and in particular with regard to an effective focusing of a focusing of laser radiation when using the biconical lens when used in a laser scanner.

In addition, it can be made possible in this embodiment that, for example, a conventional conical glass lens is assumed and then a corresponding plastic coating is applied so as to form the biconical lens.

The provision of a glass body of the hybrid lens can enable particularly high stability and, in particular, long-term stability, since glass forms a very stable body and in particular has high thermal stability. In particular, a hybrid lens with a vitreous body and a polymer coating can be significantly more stable and in particular has improved thermal properties than a biconical lens which is only made of a polymer. In addition, the provision of the polymer coating makes it possible for the hybrid lens to have optical properties which are comparable to those of a pure glass lens, but can be produced more cost-effectively than a pure glass lens.

Thus, in particular, a biconical hybrid lens can combine effective focusing of laser radiation with good stability, good thermal properties and cost-effective manufacture.

It can furthermore be preferred for the polymer coating to have a material which is selected from the group consisting of polyimide, polycarbonate, cyclic olefin polymers, cyclic olefin copolymers and polymethyl methacrylate. In particular, these polymers can enable a preferred property profile of the biconical lens, which comprises good stability and good optical properties. In addition, these polymers have a refractive index similar to that of glass, so that the laser radiation does not experience any significant deflection during the glass / polymer transition.

With regard to polycarbonates, in particular a high thermal resistance in a range from -137 ° C. to + 124 ° C. can be allowed and, in addition, good mechanical properties can also be made possible.

Cyclic olefin copolymers (COP) as well as cyclic olefin polymers (COP) are a basically known class of polymers. By changing the polymer structure, such as the installation ratios of cyclic and linear olefins in the COCs, these allow their properties to be changed over a wide range. Essentially, the heat resistance is set in a range from 65 to 190 ° C. Furthermore, all COPs and COCs share a number of properties such as good thermoplastic flowability, high rigidity, strength and hardness, as well as low density and high transparency with good acid and alkali resistance.

However, the other polymers mentioned, polymethyl methacrylate and polyimide, are also distinguished by high transparency and other optical properties and advantageous mechanical properties. It may further be preferred that the biconical lens is designed as a Zernike lens. It has surprisingly been found that, in particular, a biconical lens, which is designed as a Zernike lens, can enable a particularly effective focusing of the laser radiation and can thus particularly effectively reduce scattered radiation and thus the risk of glare in a laser scanner.

A Zernike lens can be understood to mean a lens with a surface that has a Zernike surface or a surface that corresponds to a Zernike polynomial. Such a conical surface is not, like a conventional conical lens, defined only by the radius and the conical constant, but in addition to the radius and the conical constant also by additional aspherical parameters. Such lenses are generally known to the person skilled in the art and are described below purely by way of example.

The standard Zernike surface is defined by polynomials corresponding to flat aspherical surfaces and additionally by aspherical parameters, which are defined by the Zernike standard coefficients. The surface or the surface curvature can have the following shape:

where the parameters are defined as follows: z: is the standard Zernike surface (Zernike Standard Sag surface); c: is the reciprocal radius (c = 1 / R); r is the radial radiation coordinate (ray coordinate) in the lens unit; k is the conic constant; N is the number of Zernike coefficients in the series; Ar. is the coefficient of the it Zernike Standard Polynomial (coefficient on the ith Zernike Standard polynomial); Z is the Zernike Koeffi cient; p is the normalized radial ray coordinate and f is the angular ray coordinate; and ai (a1 - a8) are the aspheric coefficients.

With regard to further technical features and advantages of the biconical lens, reference is made to the description of the laser scanner, the driving support system, the vehicle, the figures and the description of the figures, and vice versa. The present invention further relates to a laser scanner, in particular for a driving support system of a motor vehicle, comprising a laser source for emitting laser radiation along a beam path, wherein at least one lens for influencing the cross section of the laser radiation is arranged in the beam path of the laser radiation, it further being it is provided that at least one biconical lens, which is designed as a biconical hybrid lens, is arranged in the beam path of the laser radiation as a lens for influencing the cross section of the laser radiation, the biconical hybrid lens having a glass body which is provided with a polymer coating.

Such a laser scanner enables the scattered radiation of the laser radiation to be reduced in a simple manner and can thus be advantageous

Property profile reduce glare security for people and animals in the detection area of the laser scanner.

The laser scanner described here is used in particular in a

Driving assistance system of a motor vehicle. As such, the laser scanner can, for example, in the front area of the vehicle or in the rear area of the

Be arranged vehicle and be positioned or aligned such that an environment observation in the direction of travel in front of the vehicle, that is in particular in front of the vehicle, or also in front of the rear of the vehicle, is possible by the laser scanner. For example, the laser scanner can be arranged in the front or rear bumper or in a headlight housing.

The driving support system, which is equipped with such a laser scanner, can thus serve in particular to monitor the surroundings and, for example, warn of collisions, give driving instructions or support autonomous driving. Such driving support systems are known in principle and are always being used.

Coming back to the laser scanner, which is part of such

Driving support system can be provided that it has a laser source for emitting laser radiation along a beam path. A laser source is therefore to be understood in the sense of the present invention in particular a unit that can emit laser radiation. The specific configuration of the laser source is not restricted, but the laser source can preferably be a laser diode, for example. For example, the laser source can be configured as an arrangement of a large number of laser diodes. From the laser source is accordingly

Laser radiation guided along a beam path. The beam path runs in particular from the laser source into a detection area of the laser scanner. Objects located in the detection area can reflect the laser radiation and can thus be detected by a detector, which can also be part of the driving support system. For example, the laser scanner can be configured as a LIDAR.

In order to modulate the laser radiation accordingly and to define the beam path, optical components are provided in the beam path of the laser scanner in a manner known per se.

At least one optical deflection element for deflecting the laser radiation is preferably provided in the beam path of the laser radiation, that is to say the laser radiation emitted by the laser source. A deflection element is to be understood in particular to mean an element of this type which can deflect the laser radiation in the desired manner and, as such, can reflect it, for example. As such

Deflection element, for example, at least one microscanner can be provided. A microscanner in particular includes a MEMS scanner

or to understand the object referred to as MEMS mirror, which serves to reflect the laser radiation and can thereby scan the detection area of the laser scanner by means of mobility. Microscanners or MEMS mirrors are thus, in particular, microassemblies comprising an actuator motor and a mirror element. This makes it possible to set discrete angles between the negative and the positive maximum of an actuator chip

to be controlled repeatedly.

Furthermore, the microscanner can be used to modulate the laser radiation, as is immediately apparent to the person skilled in the art. A reflector can also be provided in front of the MEMS mirror in order to

To direct laser radiation from the laser source onto the MEMS mirror or the microscanner.

Furthermore, a device for influencing the cross section of the laser radiation is preferably, but not limited to, arranged in the beam path of the laser radiation in front of the deflection element. As a result, the cross section of the laser radiation can be set in the desired manner and thus in accordance with the desired one

Application can be modulated.

The laser scanner described here is also designed such that in the

Beam path of the laser radiation as a lens for influencing the cross section of the laser radiation is arranged at least one biconical lens which is designed as a biconical hybrid lens, the biconical hybrid lens having a glass body which is provided with a polymer coating.

It was found that the above-described design and, in principle, the provision of a previously described biconical lens can counteract this, in particular in the case of microscanners as

Deflection element can occur that, on the one hand, due to the divergence of the laser beam and, on the other hand, due to the effective area of the microscanner, depending on the deflection angle of the mirror, part of the laser beam is not reflected by the mirror itself, but rather by a mirror support.

If, for example, the light reflected on the mirror carrier now emerges from the laser scanner, in particular from a housing of the laser scanner, eye safety can be limited. This is particularly so because the light reflected by the mirror carrier exits undefined and is therefore not focused in the desired manner. About this undefined emerging part of the laser radiation can be called scattered radiation. The occurrence of this scattered radiation can thus in particular reduce eye safety with regard to any that may occur

Risk of glare for people and animals. Because the above-described biconical lens is provided, the above-described problems with regard to eye safety, in particular of a laser scanner equipped with a microscanner, can be significantly improved.

In this regard, the above-described adaptation is particularly advantageous because the distances and the spatial geometry of the optical components are fixed in the configuration of the laser scanner, in order to reduce the diameter of the optical component

Beam or a small spot. The scattered radiation can then be determined by measurements or computer simulation and thus counteracted by the biconical lens. An adaptation of the

Laser scanner in its arrangement of the optical components to each other, for example to work with existing collimator elements or other components and thereby block the scattered radiation via the relative arrangement of the optical elements to one another, is not or only with difficulty and precisely with influencing the diameter of the beam of the laser radiation or focusing possible.

It can also be advantageous for the biconical hybrid lens to be arranged in the beam path of the laser radiation immediately after the radiation source. In this embodiment, the tendency towards glare of the laser scanner can be reduced particularly effectively. Because in this embodiment, the lens is in particular in front of the

Deflection element and thus arranged in front of the MEMS mirror or microscanner. This makes it possible to reduce a divergent portion of the laser radiation in front of the deflecting element, so that only focused and in particular parallel laser radiation is directed onto the laser beam

Deflection element meets. As a result, even before the laser radiation hits the deflection element, it is possible for the laser radiation to be arranged in such a way that it only hits the desired optical region of the deflection element and is thus reflected in a defined manner by the deflection element, such as the microscanner. This can, for example, effectively prevent laser radiation from hitting the mirror carrier of a microscanner as a deflection element and from there

Can be reflected undefined. In this embodiment, scatter radiation can thus be effectively blocked before the deflecting element, which can reduce eye safety with regard to a possible risk of glare for people and animals. The divergent portion of the laser radiation in front of the deflection element can still be comparatively small, so that the dimensions are comparatively small

Components can be worked as lenses. This configuration can thus, for example, in the case of small-sized laser scanners or in

limited space can be an advantage.

In this embodiment in particular, an already provided component can also be replaced by the above-described biconical lens, such as a FAC lens, which can enable simple implementation in existing systems.

Finally, it can be made possible in a particularly effective manner that glare tendency is effectively reduced, since a FAC lens is usually arranged directly behind the radiation source, which can have significant advantages, as is described in detail below.

Furthermore, it may be possible to dispense with an SAC collimator element, which can save costs and installation space.

It can be preferred that the radiation source has a laser diode.

In this embodiment in particular, a high long-term stability can be combined with a low tendency of the laser scanner to glare. In particular, a beam can be emitted by a laser diode, which is very narrow

Has beam path, so that laser radiation emanating from a laser diode already has a very low glare potential. In addition, laser diodes are characterized by a long, damage-free working time, so that the

In this regard, laser scanners have a high long-term stability.

In addition, using a laser diode, it can be made possible to provide a compact laser source. This allows such a laser scanner to be arranged well even with a small space requirement, as is often the case in particular in motor vehicles. This can also be further favored by the fact that laser diodes can be manufactured in so-called SMT technology (Surface Mount Technology). In this embodiment, the diode can be arranged directly on the circuit board, which favors a simple structure. Finally, a laser diode offers high performance, which is particularly advantageous for effective environment detection over a large area of the laser scanner.

The provision of the biconical lens as described above can also make it possible to enable effective focusing of the laser radiation with a balanced property profile, in particular of the biconical lens.

With regard to further technical features and advantages of the laser scanner, reference is made to the description of the biconical lens, the driving support system, the vehicle, the figures and the description of the figures, and vice versa.

The present invention furthermore relates to a driving support system for monitoring the surroundings, in particular for a vehicle, comprising a laser scanner for emitting laser radiation and a detector for detecting laser radiation reflected from an object to be detected, the driving support system also providing a control unit for evaluating the detector Has data, the laser scanner being designed as described in detail above.

Such a driving support system thus serves to monitor the surroundings of a vehicle in a manner known per se. In particular, objects such as people, animals or objects are to be detected thereby, for example to prevent collisions. For this purpose, a laser scanner is provided which emits laser radiation and thus directs the objects located in the detection area of the laser scanner. The laser radiation is reflected by the objects and can be detected by a detector. As a result, a spatial arrangement of the objects to the vehicle and a distance measurement are possible. Accordingly, the data, in particular of the detector, can be evaluated by a control unit. This makes it possible, for example, to issue driving instructions, initiate driving interventions, such as emergency braking, or even enable fully autonomous driving.

It can be problematic when emitting laser radiation that there is an increased risk of glare for people or animals located in the detection area, in particular due to scattered rays. Because the laser scanner is configured as described above, such a risk of glare can be significantly reduced. Accordingly, the eye security of the laser scanner can be improved. Furthermore, the laser scanner can have a very balanced property profile.

With regard to further technical features and advantages of the driving support system, reference is made to the description of the lens, the laser scanner, the vehicle, the figures and the description of the figures, and vice versa.

The present invention also relates to a vehicle, in particular a motor vehicle, comprising a driving support system for monitoring the surroundings of the vehicle, the driving support system being designed as described above.

The vehicle described here can in principle be any vehicle, such as a motor vehicle, which is to be equipped with environmental monitoring. For this purpose, the vehicle has a driving support system with a laser scanner, in particular LIDAR, as described above in detail.

As described above, it can be problematic when emitting laser radiation from a laser scanner that, particularly as a result of scattered rays, there can be a greater risk of glare for persons or animals located in the detection area.

Because the vehicle has a driving support system with a laser scanner as described above, such a risk of glare can be significantly reduced. The eye safety of the laser scanner can be improved accordingly. Furthermore, the laser scanner can have a very balanced property profile.

With regard to further technical features and advantages of the vehicle, reference is made to the description of the biconical lens, the laser scanner, the

Driving assistance system, the figures and the description of the figures referenced, and vice versa. Further advantages and advantageous refinements of the objects according to the invention are illustrated by the drawings and explained in the following description, the features described individually or in any one

Combination can be an object of the present invention, insofar as the context does not clearly indicate the opposite. It should be noted that the drawings are only descriptive and are not intended to limit the invention in any way. Show it

Fig. 1 shows schematically the beam path of a laser scanner at a

Design of a laser scanner according to the invention;

FIG. 2 shows, in a schematic manner, an embodiment of a biconical lens according to the invention; and

Fig. 3 shows schematically another view of the embodiment of Fig. 2 as a sectional view from the side.

FIG. 1 shows a laser scanner 10 in a schematic manner. The laser scanner 10 is used, in particular, for use in a driving support system of a motor vehicle, such as a passenger car, and in particular for one

Perform environmental monitoring. In particular, the laser scanner 10 serves to detect objects, such as people, animals or even objects, in the detection area of the laser scanner 10 and thereby to obtain information about the distance and the spatial position of the objects from the laser scanner 10 and thus from the vehicle. Accordingly, the laser scanner 10 can serve to issue warnings when there is a risk of a collision, or also to issue driving instructions,

Carrying out driver interventions or also supporting partially or completely autonomous driving.

For this purpose, the laser scanner 10 comprises a laser source 12, such as a laser diode or a plurality of laser diodes, which is designed to emit laser radiation 14. The laser radiation 14 runs in a beam path which is defined or influenced by optical elements arranged in it. As an optical element, the laser scanner has, for example, a microscanner 16 as a deflection element, to which the laser radiation is directed, for example by a reflector 15. The microscanner 16 comprises an in particular movable mirror 18 around which To direct laser radiation 14 in the desired manner into the detection range of laser scanner 10 or to modulate laser radiation 14. The mirror 18 is arranged on a mirror carrier 20.

Furthermore, an optical lens 22 is provided in the beam path of the laser radiation 14 as a device for influencing the cross section of the laser radiation 14. Following the beam path of the laser radiation 14, the lens 22 is arranged immediately after the laser source 12. The lens 22 is designed as a biconical hybrid lens 24, the biconical hybrid lens 24 having a glass body 26 which is provided with a polymer coating 28.

Due to the fact that the lens 22 is designed as a biconical hybrid lens 24, a more complicated configuration comprising a FAC collimator element and an SAC collimator element can be dispensed with, which significantly simplifies the construction. Because the biconical hybrid lens can already focus the laser radiation in a horizontal plane as well as in a vertical plane.

In principle, it can be problematic in the case of a laser scanner 10 that, for example, laser radiation 14, which is reflected undefinedly on the mirror support 20, or by other scatter radiation, can cause a risk of dazzling in the

Detection area of the laser scanner 10 located people and animals. This negative effect can be countered effectively by designing the lens 22 as a biconical hybrid lens 24, the biconical hybrid lens 24 having a glass body 26 which is provided with a polymer coating 28, as described above.

A prism 30 is provided in the radiation direction behind the microscanner 16, from which the laser radiation 14 can radiate into the detection area of the laser scanner 10. If the laser radiation 14 is reflected by an object to be detected, it arrives at a detector, not shown

Driving support system, from which data arrive at a control unit and can be evaluated for environmental monitoring as described above. Figure 2 shows the biconical hybrid lens 24 in a larger view. It can be seen here that the biconical hybrid lens 24 has a first curvature 32 in a first plane and furthermore has a second curvature 34 in a second plane arranged at right angles to the first plane.

It is also indicated that the biconical hybrid lens 24 influences the laser radiation 14 in such a way that it is focused and in particular has no or only a very limited diverging component.

FIG. 3 also shows a cross section through the biconical hybrid lens 24. It is shown that the biconical hybrid lens 24 has a glass body 26 which is provided with a polymer coating 28. In particular, in combination with FIG. 2, it is indicated that the glass body 26 defines the focal length of the biconical hybrid lens 24 and that the polymer coating 28 defines aspherical parameters of the biconical hybrid lens 24. In particular, the biconical lens is designed as a Zernike lens.

With regard to the polymer coating 28, it is further provided that it is formed from a material that is selected from the group consisting of polyimide, polycarbonate, cyclic olefin polymers, cyclic olefin copolymers and polymethyl methacrylate. As a result, the optical properties of the biconical hybrid lens 24 can be set in a very defined manner and excellent mechanical properties can also be made possible.

This makes it possible to solve the problem that laser radiation 14 is effectively focused with a high force onto a very small mirror, such as in particular the microscanner 16, with a size of, for example, 4x2 mm, in order to reduce risks to eyes from stray light. Reference numerals

Laser scanner

Laser source

Laser radiation

reflector

Microscanner

mirror

Mirror support

lens

biconical hybrid lens

Vitreous

Polymer coating

prism

first curvature

second curve

Claims

claims

1. Optical lens for a laser scanner (10), characterized in that the optical lens (22) is designed as a biconical lens, the biconical lens being designed as a biconical hybrid lens (24), the biconical hybrid lens (24) also being a vitreous body (26) having a

Polymer coating (28) is provided.

2. Lens according to claim 1, characterized in that the vitreous body (26) defines the focal length of the biconical hybrid lens (24) and that

Polymer coating (28) defines aspherical parameters of the biconical hybrid lens (24).

3. Lens according to claim 1 or 2, characterized in that the

Polymer coating (28) has a material selected from the group consisting of polyimide, polycarbonate, cyclic olefin polymers, cyclic olefin copolymers and polymethyl methacrylate.

4. Lens according to one of claims 1 to 3, characterized in that the

biconical hybrid lens (24) is designed as a Zernike lens.

5. Laser scanner, in particular for a driving support system

Motor vehicle, comprising a laser source (12) for emitting

Laser radiation (14) along a beam path, at least one lens (22) in the beam path of the laser radiation (14) for influencing the

Cross section of the laser radiation (14) is arranged, characterized in that in the beam path of the laser radiation (14) as a lens (22) for

Influencing the cross section of the laser radiation (14) at least one biconical hybrid lens (24) is arranged, the biconical hybrid lens (24) having a glass body (26) which is provided with a polymer coating (28).

6. Laser scanner according to claim 5, characterized in that the biconical hybrid lens (24) is arranged in the beam path of the laser radiation (14) immediately after the radiation source (12).

7. Laser scanner according to claim 5 or 6, characterized in that the

Laser scanner (10) in the beam path of the laser radiation (14)

Has microscanner (16), the biconical hybrid lens (24) in the

The beam path of the laser radiation (14) is arranged in front of the microscanner (16).

8. Laser scanner according to one of claims 5 to 7, characterized in that the radiation source (12) has a laser diode.

9. driving support system for monitoring the surroundings of a vehicle,

comprising a laser scanner (10) for emitting laser radiation (14) and a detector for detecting laser radiation (14) reflected from an object to be detected, the driving support system further comprising a

Control unit for evaluating data supplied by the detector, characterized in that the laser scanner (10) is designed according to one of claims 1 to 8.

10. Vehicle, in particular motor vehicle, comprising a driving support system for monitoring the surroundings of the vehicle, characterized in that the driving support system is designed according to claim 9.