Laminated glass pane for filtering electromagnetic radiation, method for operating a laminated glass pane, and motor vehicle with a laminated glass pane

Abstract

The invention relates to a laminated glass pane (1) for filtering electromagnetic radiation, comprising a first glass layer (4), a second glass layer (5), and an intermediate layer (6) arranged over a surface between the first glass layer (4) and the second glass layer (5). The intermediate layer (6) is provided to have an emitter layer (7) which, depending on the angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer (8) which reflects the electromagnetic radiation depending on its wavelength. The invention further relates to a method for operating a laminated glass pane (1) for filtering electromagnetic radiation and to a motor vehicle with a laminated glass pane (1).

Description

The invention relates to a laminated glass pane for filtering electromagnetic radiation, particularly for a motor vehicle, comprising a first glass layer, a second glass layer, and an intermediate layer arranged planarly between the first and second glass layers. The intermediate layer includes an emitter layer which, depending on the angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer which reflects the electromagnetic radiation depending on its wavelength. The invention further relates to a method for operating a laminated glass pane and a motor vehicle. For example, the prior art document WO 2014 / 029536 A1 describes a laminated glass pane with electrically switchable optical properties, comprising at least: an outer pane and an inner pane, which are connected to each other over an area via an intermediate layer; within the intermediate layer a switchable functional element with at least one active layer; and an infrared protective coating arranged over an area between the outer pane and the active layer, wherein the infrared protective coating contains at least three functional layers with reflective properties for the infrared range. Furthermore, the publication DE 602 08 002 T2 discloses a transparent roof structure for a vehicle, comprising: a glass roof with a reinforced mesh layer and a mesh-glass layer formed by a first glass layer above and a second glass layer below the reinforced mesh layer, a glass strut formed from the mesh-glass layer and extending obliquely downwards from a front corner of the glass roof, a windshield made of transparent glass and extending between a front end of the glass roof and an inner end of the glass strut, a support with a retaining part having a glass-retaining groove against which a lower part of the windshield engages, a fastening part extending from the retaining part and several support retaining holes arranged in the width direction of the fastening part, and an annular frame attached to each side of the glass roof, the glass strut, the windshield and the rear window. Furthermore, CN 116088201 A describes a modulation structure characterized by comprising a substrate and a modulation unit arranged on the substrate, wherein the modulation unit comprises an alternately laminated modulation layer and a phase-change material layer, wherein the modulation layer is used to generate an energy field under the influence of an external control signal, wherein the energy field is used to adjust the refractive index of the phase-change material layer in order to adjust the reflectivity of the control unit to an electromagnetic target wave. Patent application US 2018 / 0354848A1 discloses a device for passive cooling by selective radiative emission. The device uses an optically transparent chemical coating that can cool a transparent substrate, such as a window pane, even when exposed to sunlight, and without being connected to a liquid coolant or an electrical power source. The device may include a transparent substrate and an optically transparent chemical coating on the substrate for radiating heat away from the substrate. Further prior art documents include DE 10 2015 001 525 A1, JP 2013 - 2020 631 A, DE 10 2023 100 216 B3 and DE 197 28 449 C1. Non-patent literature includes the Wikipedia article "Passive daytime radiative cooling" (in: Wikipedia, The Free Encyclopedia. Revision as of 11.03.2025. URL: https: / / en.wikipedia.org / w / index.php?title=Passive_daytime_radiative_cooling&oldid=1279888643) and the publication CHEN, M [et al.]: "Passive daytime radiative cooling: Fundamentals, material designs, and applications". (In: EcoMat. 2022;4;e12153. - doi:10.1002 / eom2.12153 ). The object of the invention is to propose a laminated glass pane for filtering electromagnetic radiation, which has advantages over known laminated glass panes, in particular preventing the passage of heat radiation particularly effectively, but allowing light in the visible wavelength range to pass through. According to the invention, this is achieved with a laminated glass pane for filtering electromagnetic radiation with the features of claim 1. It is provided that the reflector layer has a honeycomb layer made of metal with a honeycomb structure and optionally a mirror layer forming a dielectric mirror. Basically, the intermediate layer is designed to have an emitter layer which, depending on the angle of incidence of the electromagnetic radiation, absorbs part of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer which reflects the electromagnetic radiation depending on its wavelength. Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are possible. The laminated glass pane serves to filter electromagnetic radiation, particularly ambient light such as sunlight. This electromagnetic radiation encompasses a wavelength range that includes at least visible light and thermal radiation. Visible light refers specifically to electromagnetic radiation with a wavelength range of 380 nm to 750 nm; therefore, the wavelength of visible light is at least 380 nm and at most 750 nm. Thermal radiation refers to electromagnetic radiation in the infrared range, i.e., electromagnetic radiation with a wavelength greater than 750 nm. Where this description refers to electromagnetic radiation and / or light, it preferably means electromagnetic radiation within the specified spectrum, i.e., the entirety of visible light and thermal radiation. However, the electromagnetic radiation or light may also contain ultraviolet light, i.e., UV radiation. This has a wavelength of less than 380 nm, but preferably at least 10 nm. This component is optional and depends on the ambient conditions, in particular the composition of the ambient light or sunlight. Infrared radiation can be subdivided into near-infrared, mid-infrared, and far-infrared radiation, thus encompassing a near-infrared (NIR) range, a mid-infrared (MIR) range, and a far-infrared (FIR) range. According to the common definition, the near-infrared range extends from wavelengths greater than 750 nm, particularly 760 nm, up to 1,500 nm. The mid-infrared range includes electromagnetic radiation with wavelengths greater than 1,500 nm up to a maximum of 3,000 nm, while the far-infrared range includes electromagnetic radiation with wavelengths greater than 3,000 nm, particularly up to a maximum of 1 mm, corresponding to 106 nm. The laminated glass pane is preferably an integral part of the motor vehicle; however, it can, of course, also exist separately, particularly until it is installed in or on the vehicle. For example, the laminated glass pane is used as a glass roof for the vehicle, but it can also be in the form of a windshield, rear window, or side window. Laminated glass panes can also be used effectively outside of motor vehicles, for example, as a component of a building window, such as a facade window or a skylight. In any case, laminated glass separates an exterior environment from an interior, such as that of a vehicle or building, at least temporarily. Laminated glass is transparent, allowing light, especially from the exterior, to pass through into the interior, so that ambient light, such as sunlight, is available to illuminate the interior. However, only visible light is needed for this purpose. With conventional laminated glass, heat radiation also passes through in addition to visible light, causing the interior to heat up. Therefore, laminated glass is sometimes combined with a shading device, such as a cover (e.g., a roller blind) or a dimmer switch, which darkens and / or covers the laminated glass, at least temporarily. In the case of the dimmer, the laminated glass pane is dimmable; its transparency is adjustable. In the first setting, light—both visible light and heat radiation—can pass through the laminated glass pane, at least partially. In the second setting, the laminated glass pane is partially opaque, particularly milky and / or cloudy, thus reducing the intensity of both visible light and heat radiation. The dimmer operates, for example, using a semiconductor; the laminated glass pane contains a semiconductor layer that implements the settings. While the measures described partially prevent heat radiation from the outside environment from entering the interior, this also applies to visible light. Regardless of whether a cover or a dimmer is used, the view from the interior to the outside is at least partially obstructed or restricted by the laminated glass, thus reducing the comfort of the vehicle's occupants. Furthermore, the cover is an additional mechanical component that may be visually distracting. In contrast, the dimmer is comparatively expensive. For this reason, a laminated glass pane is to be created in which, without additional components and / or dimmers, the heat radiation is at least partially removed from the electromagnetic radiation or its spectrum, so that a greater proportion of visible light passes through the laminated glass pane than a greater proportion of heat radiation. The laminated glass pane thus allows a greater proportion of visible light to pass through than heat radiation. This reliably reduces unwanted heating of the interior while simultaneously preserving visibility through the laminated glass pane. This is achieved using the interlayer. The interlayer is positioned between the two glass layers of the laminated glass pane, i.e., between the first and second glass layers. The first and second glass layers are understood to be glass layers that are transparent to electromagnetic radiation, meaning they allow both visible light and thermal radiation to pass through them to a significant degree. For example, each glass layer has a visible light transmittance of at least 75%, but preferably at least 80%, at least 85%, or at least 90%. For thermal radiation, the glass layers, for example, have a similar transmittance, i.e., a transmittance of at least 75%. However, at least one of the glass layers can also be designed as a thermal insulation layer and thus have different transmittances for visible light and thermal radiation. For example, in the case of the thermal insulation layer, the transmittance for visible light corresponds to one of the values ​​mentioned above, while the transmittance for thermal radiation is preferably lower, in particular at most 60%, at most 50%, or at most 40%. The glass layers can be identical, i.e., have identical or at least similar transmittances. However, it is also possible for the glass layers to be designed differently, for example, having different thicknesses and / or different transmittances for visible light and / or thermal radiation. The intermediate layer is arranged between the two glass layers. The intermediate layer preferably overlaps the glass layers in mutually perpendicular directions, i.e., in a Cartesian coordinate system, to a coverage of at least 80%, at least 90%, or at least 95%. Preferably, the intermediate layer completely overlaps the glass layers, meaning the space between them is entirely filled by the intermediate layer. The intermediate layer comprises at least an emitter layer and a reflector layer. The emitter layer is designed and configured to absorb and re-emit electromagnetic radiation depending on its angle of incidence onto the intermediate layer. This means that the emitter layer converts some of the electromagnetic radiation into energy and, based on this energy, emits more electromagnetic radiation. In other words, the emitter layer absorbs some of the electromagnetic radiation and consequently emits more electromagnetic radiation, which then becomes part of the electromagnetic radiation emitted beyond the emitter layer. The absorption of electromagnetic radiation occurs in the first wavelength range, and the emission in the second. These wavelength ranges, i.e., the first and second wavelength ranges, are distinct, encompassing different wavelengths. In particular, the second wavelength range includes longer wavelengths of electromagnetic radiation than the first. Specifically, the first wavelength range lies in the near-infrared region, and the second wavelength range in the mid-infrared or far-infrared region. While the two wavelength ranges may overlap, they are preferably spaced apart with respect to the wavelengths they encompass, so that no overlap occurs. Absorption occurs depending on the angle of incidence. If the angle of incidence lies within a defined range, the electromagnetic radiation is absorbed with a first absorptivity; outside this range, it is absorbed with a second absorptivity that differs from the first. The second absorptivity is preferably greater than the first, and in particular, the first absorptivity is significantly lower than the second. Preferably, the first absorptivity is at most 40%, at most 30%, or at most 20%, whereas the second absorptivity is at least 60%, at least 70%, or at least 80%. It is also possible for the first absorptivity to be at most 10%, at most 5%, or approximately or equal to 0%. Ideally, electromagnetic radiation striking the emitter layer at an angle of incidence within the angular range is only slightly absorbed in the first wavelength range; however, electromagnetic radiation of the same wavelength range striking it at an angle of incidence outside the angular range is absorbed to a greater extent. The absorbed electromagnetic radiation is then re-emitted at a different wavelength, specifically one in the second wavelength range. In other words, the emitter layer converts electromagnetic radiation striking it at an angle of incidence outside the angular range into electromagnetic radiation in the second wavelength range within the first wavelength range. The reflector layer serves to reflect at least some of the electromagnetic radiation, depending on the wavelength of the electromagnetic radiation. In particular, the reflector layer is designed and configured to allow visible light to pass through while reflecting thermal radiation. The reflector therefore has a higher transmittance and a lower reflectance for visible light than for thermal radiation. The thermal radiation reflected by the reflector layer is preferably absorbed by the emitter layer and re-emitted in a different wavelength range, especially towards the outside environment. For this purpose, when the laminated glass pane is arranged as intended, the emitter layer is located on a side of the reflector layer facing the outside environment and / or the reflector layer is located on a side of the emitter layer facing the interior. The intermediate layer is designed such that it allows electromagnetic radiation in the first wavelength range to pass through without absorption, provided the electromagnetic radiation strikes the intermediate layer within a specific angular range. However, if the electromagnetic radiation strikes the intermediate layer at an angle outside this range, the portion of the electromagnetic radiation in the first wavelength range is at least partially absorbed and re-emitted in the second wavelength range. The angular range includes, in particular, a perpendicular incidence of the electromagnetic radiation on the intermediate layer, i.e., an angle of 90°. Specifically, the angular range extends uniformly around this angle, for example, from a first angle to a second angle that lies midway between them. The first angle is, for example, at least 50°, at least 60°, or at least 70°, whereas the second angle is preferably at most 130°, at most 120°, or at most 110°. Thus, the angular range preferably extends from 50° to 130°, from 60° to 120°, or from 70° to 110°.If the electromagnetic radiation falls on the intermediate layer at an angle of incidence outside this angular range, i.e., at an angle smaller than the first angle or larger than the second angle, absorption occurs; otherwise, it does not occur or occurs only to a lesser extent, as already explained. At least that portion of the electromagnetic radiation from the external environment that strikes the laminated glass pane at an angle of incidence within the specified range initially passes through the first glass pane and the emitter layer, essentially unimpeded, until it reaches the reflector layer. The reflector layer allows the visible portion of the electromagnetic radiation to pass through, so that it passes through the reflector layer and the second glass layer and thus enters the interior. Thermal radiation, on the other hand, is reflected by the reflector layer. Since the angle at which the electromagnetic radiation is present changes during reflection, the thermal radiation, after being reflected by the reflector layer, strikes the emitter layer at a different angle than before. Accordingly, it is now at least partially absorbed and re-emitted in a different wavelength range. Preferably, the reflector layer is designed such that the thermal radiation is reflected at an angle of incidence that differs from its angle of incidence, in particular at an angle of incidence outside the specified range. This achieves the aforementioned advantages and reliably prevents the thermal radiation from passing through the laminated glass pane from the outside environment into the interior. A further development of the invention provides that the emitter layer comprises polydimethylsiloxane applied to the first glass layer. This material is particularly well-suited for the emitter layer because it possesses the aforementioned properties, namely, it absorbs and re-emits electromagnetic radiation depending on the angle of incidence, thus changing the wavelength range. The material is preferably applied to the first glass layer, and in particular, it is present as a coating of the first glass layer. In any case, however, the polydimethylsiloxane is positioned between the first glass layer and the reflector layer. This achieves the aforementioned advantages. A further development of the invention provides that the polydimethylsiloxane is doped, in particular with lead sulfide, mercury telluride, and / or indium antimonite. Polydimethylsiloxane itself is usually at least partially transparent, namely to both visible light and thermal radiation. To achieve the desired behavior of the polydimethylsiloxane, it is provided with a dopant, which preferably consists of or comprises one of the aforementioned materials. This achieves the aforementioned advantages. The invention provides that the reflector layer comprises a honeycomb layer made of metal with a honeycomb structure and optionally a mirror layer forming a dielectric mirror. The reflector layer thus includes either the honeycomb layer or the mirror layer and the honeycomb layer. In the latter case, the honeycomb layer is located between the mirror layer and the emitter layer. The mirror layer is formed by the dielectric mirror and therefore consists of dielectric materials. Specifically, the dielectric mirror comprises several layers with different refractive indices. Due to interference, a high reflectance can thus be achieved for specific wavelengths. In particular, layers with a low and a high refractive index alternate within the dielectric mirror.The mirror layer or dielectric mirror is designed in such a way that it reflects heat radiation but allows visible light to pass through. The honeycomb layer features a honeycomb-shaped structure made of metal. This metal is present, in particular, as a metal substrate, meaning it is applied to a support element. The honeycomb structure is uniform and periodic, with honeycomb openings and the ribs separating them. The honeycomb structure and / or the thickness of the honeycomb layer are chosen to be transparent to visible light, specifically exhibiting a transmittance of at least 60%, 70%, or 80%. The reflectance of the honeycomb layer for thermal radiation depends on the choice of metal. Gold, silver, aluminum, copper, and circuit boards are particularly well-suited for the honeycomb layer. Silver is especially preferred, as this provides the aforementioned advantages. A further development of the invention provides that the honeycomb layer is arranged between the reflective layer and the emitter layer. Such a configuration has already been mentioned. The electromagnetic radiation from the external environment striking the laminated glass pane passes through the emitter layer to the honeycomb layer and is directed by it, at varying intensities, onto the reflective layer. In addition, the honeycomb layer filters out electromagnetic radiation with long wavelengths and reflects electromagnetic radiation reflected by the reflective layer. The honeycomb layer is adjusted to a desired light transmission, in particular by modifying its honeycomb structure and / or its material thickness. This configuration also serves to achieve the advantages already mentioned. A further development of the invention provides that the dielectric mirror exhibits its highest reflectivity across the electromagnetic spectrum in a wavelength range from 760 nm to 1,500 nm. Accordingly, the dielectric mirror reflects electromagnetic radiation primarily in the near-infrared range. The electromagnetic radiation reflected in this way returns to the emitter layer, which absorbs it in the first wavelength range, particularly also in the near-infrared range, and re-emits it in the second wavelength range, preferably in the far-infrared range. This results in particularly effective reflection of thermal radiation, thus reducing or even preventing the heating of the interior. A further development of the invention provides that the dielectric mirror comprises a first layer made of a more electrically reactive first material and a second layer made of a less electrically reactive second material. The layers of the dielectric mirror are said to differ in their electrical reactivity. This means that the materials, i.e., the first material and the second material, react differently to an electric field, namely the first material reacting more strongly than the second material. The different electrical reactivities of the materials allow for manipulation of the dielectric mirror. This means that the reflectance can be adjusted by the electric field, particularly by applying an electrical voltage to the dielectric mirror. Such a design enables the targeted adjustment of the laminated glass pane's transmittance to thermal radiation, so that, for example, in winter the thermal radiation can be used to heat the interior, while in summer the transmission of thermal radiation into the interior is at least partially prevented. The first material used can be, for example, titanium dioxide (TiO2), indium tin oxide (ITO), graphene, or tin oxide (ZnO). The second material can be, for example, magnesium dioxide (MgO2), silicon dioxide (SiO2), or a polymer. The combination of titanium dioxide and magnesium dioxide as the first and second materials is particularly preferred. This also serves to achieve the advantages already mentioned. A further development of the invention provides that the honeycomb structure has honeycomb openings and struts located between the honeycomb openings, wherein the honeycomb opening width is greater than the strut width, in particular by a factor of at least 5, at least 10, or at least 15. The honeycomb openings and the struts are arranged periodically, i.e., uniformly distributed, within the honeycomb structure. The honeycomb openings have the honeycomb width, and the struts, particularly in the direction between the honeycomb openings, have the strut width. For example, the honeycomb openings are square. The honeycomb width is preferably greater than the strut width by one of the aforementioned factors to achieve sufficient light transmission of the honeycomb layer. For example, a honeycomb width of 50 µm to 250 µm, of 75 µm to 150 µm, or of approximately or exactly 100 µm is used. This also achieves the advantages described above. The invention further relates to a method for operating a laminated glass pane for filtering electromagnetic radiation, in particular a laminated glass pane as described in this description, wherein the laminated glass pane comprises a first glass layer, a second glass layer, and an intermediate layer arranged planarly between the first and second glass layers. The intermediate layer includes an emitter layer which, depending on the angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer which reflects the electromagnetic radiation depending on its wavelength, wherein the reflectance of the reflector layer is at least temporarily altered by applying an electric current. The advantages of this type of laminated glass design and this method have already been mentioned. Both the laminated glass and the operating procedure may be further developed as described, and reference is made to these details. The invention also relates to a motor vehicle with a laminated glass pane for filtering electromagnetic radiation, preferably a laminated glass pane as described in this description, wherein the laminated glass pane has a first glass layer, a second glass layer, and an intermediate layer arranged planarly between the first and second glass layers. The intermediate layer comprises an emitter layer, which, depending on the angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer, which reflects the electromagnetic radiation depending on its wavelength.The reflector layer is designed to have a honeycomb structure made of metal and, optionally, a mirror layer forming a dielectric mirror. For further information regarding the advantages and potential improvements, please refer to the explanations in this description. The features and combinations of features described in the description, in particular those described in the following figure description and / or shown in the figures, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention, in particular the scope of the claims. Thus, embodiments that are not explicitly shown or explained in the description and / or the figures, but which emerge from or can be derived from the explained embodiments, particularly within the scope of the claims, are also to be considered as encompassed by the invention. The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. Figure 1 shows a schematic representation of a laminated glass pane for a motor vehicle. Figure 1 shows a highly schematic representation of a laminated glass pane 1 for a motor vehicle. The laminated glass pane 1 separates an external environment 2 from an internal environment 3, and is thus located between the external environment 2 and the internal environment 3. It has at least a first glass layer 4 and a second glass layer 5, between which an intermediate layer 6 is arranged. The intermediate layer 6 in turn consists of several layers, namely an emitter layer 7 and a reflector layer 8. The reflector layer 8 has a honeycomb layer 9 and / or a mirror layer 10, preferably both the honeycomb layer 9 and the mirror layer 10. The laminated glass pane 1 is designed such that visible light from the external environment 2 is allowed to pass into the interior 3, while thermal radiation is reflected at least partially, particularly to a greater extent than visible light, and its wavelength is at least partially altered. Specifically, electromagnetic radiation from the external environment 2 passes through the first glass layer 4 and, after passing through the emitter layer 7, reaches the reflector layer 8. The reflector layer 8, in particular the honeycomb layer and the mirror layer 10, allows a substantial portion of the visible electromagnetic radiation to pass through, but reflects thermal radiation, especially in the near-infrared range. The reflected electromagnetic radiation is absorbed by the emitter layer 7. The energy released in this process is converted by the emitter layer 7 into the emission of electromagnetic radiation in a second wavelength range, which differs from the first wavelength range of the absorbed electromagnetic radiation. The emitted electromagnetic radiation is preferably directed towards the external environment 2, specifically preferably as electromagnetic radiation in the far-infrared range. Overall, this results in a particularly efficient filtering out of thermal radiation from the electromagnetic radiation. REFERENCE MARK LIST: 1 Laminated glass pane 2 External environment 3 Internal environment 4 First glass layer 5 Second glass layer 6 Intermediate layer 7 Emitter layer 8 Reflector layer 9 Honeycomb layer 10 Mirror layer

Claims

Laminated glass pane (1) for filtering electromagnetic radiation, comprising a first glass layer (4), a second glass layer (5) and an intermediate layer (6) arranged planarly between the first glass layer (4) and the second glass layer (5), wherein the intermediate layer (6) comprises an emitter layer (7) which, depending on an angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer (8) which reflects the electromagnetic radiation depending on its wavelength, characterized in that the reflector layer (8) has a honeycomb layer (9) made of metal with a honeycomb structure and optionally a mirror layer (10) forming a dielectric mirror. Laminated glass pane according to claim 1, characterized in that the emitter layer (7) comprises polydimethylsiloxane applied to the first glass layer (4). Laminated glass pane according to claim 2, characterized in that the polydimethylsiloxane is doped. Laminated glass pane according to one of the preceding claims, characterized in that the honeycomb layer (9) is arranged between the mirror layer (10) and the emitter layer (7). Laminated glass pane according to one of the preceding claims, characterized in that the dielectric mirror has its highest reflectance across the electromagnetic spectrum in a wavelength range from 760 nm to 1,500 nm. Laminated glass pane according to one of the preceding claims, characterized in that the dielectric mirror has a first layer made of an electrically more reactive first material and a second layer made of an electrically less reactive second material. Laminated glass pane according to one of the preceding claims, characterized in that the honeycomb structure has honeycomb openings and webs located between the honeycomb openings, wherein a honeycomb width of the honeycomb openings is greater than a web width of the webs. Method for operating a laminated glass pane (1) for filtering electromagnetic radiation, in particular a laminated glass pane (1) according to one or more of the preceding claims, wherein the laminated glass pane (1) has a first glass layer (4), a second glass layer (5) and an intermediate layer (6) arranged planarly between the first glass layer (4) and the second glass layer (5), characterized in that the intermediate layer (6) has an emitter layer (7) which, depending on an angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer (8) which reflects the electromagnetic radiation depending on its wavelength, wherein a reflectance of the reflector layer (8) is changed at least temporarily by applying an electric current. Motor vehicle with a laminated glass pane (1) for filtering electromagnetic radiation, in particular a laminated glass pane (1) according to one or more of claims 1 to 7, wherein the laminated glass pane (1) has a first glass layer (4), a second glass layer (5) and an intermediate layer (6) arranged planarly between the first glass layer (4) and the second glass layer (5), wherein the intermediate layer (6) has an emitter layer (7) which, depending on an angle of incidence of the electromagnetic radiation, absorbs a portion of the electromagnetic radiation in a first wavelength range and re-emits it in a second wavelength range, and a reflector layer (8) which reflects the electromagnetic radiation depending on its wavelength, characterized in thatthat the reflector layer (8) has a honeycomb layer (9) made of metal with a honeycomb structure and optionally a mirror layer (10) forming a dielectric mirror.

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