CN114096409A - Composite glass pane with holographic element - Google Patents

Composite glass pane with holographic element Download PDF

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Publication number
CN114096409A
CN114096409A CN202180001824.9A CN202180001824A CN114096409A CN 114096409 A CN114096409 A CN 114096409A CN 202180001824 A CN202180001824 A CN 202180001824A CN 114096409 A CN114096409 A CN 114096409A
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CN
China
Prior art keywords
glass pane
layer
interlayer
intermediate layer
composite glass
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
CN202180001824.9A
Other languages
Chinese (zh)
Inventor
A·戈梅尔
R·卡南吉泽
A·策里帕
D·克雷克尔
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.)
Saint Gobain Glass France SAS
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Saint Gobain Glass France SAS
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Filing date
Publication date
Application filed by Saint Gobain Glass France SAS filed Critical Saint Gobain Glass France SAS
Publication of CN114096409A publication Critical patent/CN114096409A/en
Pending legal-status Critical Current

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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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    • G—PHYSICS
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    • G—PHYSICS
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Optics & Photonics (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a composite glass pane (100) comprising at least a stacked sequence formed by-an outer glass pane (1), -a first intermediate layer (3), -a holographic element (4) comprising at least one hologram or at least one set of holograms, said holograms being made in one or more layers of holographic material (16), -a second intermediate layer (5), and-an inner glass pane (2), wherein the holographic element (4) -is composed of at least one layer of holographic material (16) or-is composed of at least one layer of holographic material (16) and a substrate layer (15), and wherein the holographic material (16) and the first intermediate layer (3) and/or the holographic material (16) and the second intermediate layer (5) are directly joined to one another.

Description

Composite glass pane with holographic element
The invention relates to a composite glass pane having a holographic element, in particular for a holographic head-up display, to a method for producing such a composite glass pane and to the use of such a composite glass pane.
Composite glass sheets are currently used in many places, particularly in vehicle manufacturing. Here, the term "vehicle" includes in particular road vehicles, aircraft, ships, agricultural machines or work implements.
Composite glass sheets are also used in other fields. Including for example architectural glass or information displays, for example in museums or as advertising displays.
Composite glass panels are also commonly used to display information as head-up displays (HUDs). In this case, an image is projected onto the composite glass pane by means of a projection device in order to visualize the information into the field of view to the observer. In the field of vehicles, the projection unit is arranged, for example, on the dashboard so that the projected image is reflected in the direction of the observer on the closest glass face of the composite glass pane inclined towards the observer (see, for example, patent EP 0420228B 1 or DE 102012211729 a 1).
For head-up displays, functional holograms and, for example, reflection holograms can be used, which are laminated between the glass panes of the composite glass pane. The functional hologram may contain information recorded therein. In reflection holograms, it is possible to activate by means of the light radiated by the projector and thus the information recorded in the hologram can be reproduced to the observer.
Head-up displays comprising holographic optical elements are known, for example, from WO 2012/156124 a1, DE 102017212451 a1, WO 2018/206314 a1 and US 2019/0056596 a 1.
The object of the present invention is to provide an improved composite glass pane having a holographic element, which can be produced simply and inexpensively.
According to the invention, the object of the invention is achieved by a composite glass sheet according to claim 1. Preferred embodiments follow from the dependent claims.
The invention relates to a composite glass pane comprising at least an outer glass pane having an outer surface and an inner surface, a first intermediate layer, a holographic element, a second intermediate layer and an inner glass pane having an outer surface and an inner surface.
The holographic element according to the invention comprises at least one layer of holographic material. Furthermore, the holographic element according to the invention comprises at least one hologram or at least one set of holograms, which are made in said one or more layers of holographic material.
In an advantageous embodiment of the holographic element according to the present invention, the hologram set comprises a blue hologram, a green hologram and a red hologram. The blue hologram may be activated by blue light having a wavelength in a first range and not react to light of other wavelengths. The green hologram may be activated by green light having a wavelength in the second range and not react to light of other wavelengths. The red hologram may be activated by red light having a wavelength in a third range and not react to light of other wavelengths.
In the composite glass pane according to the invention, the holographic element is arranged between the first and the second intermediate layer, which in turn is arranged between the outer glass pane and the inner glass pane.
As mentioned above, the outer and inner glass panes each have an outer side surface (i.e. outer surface) and an inner space side surface (i.e. inner surface) and a circumferential side surface extending therebetween, which side surfaces are also referred to as side edges on account of their relatively small width. In the sense of the present invention, an outer surface denotes a main surface which is provided for facing the outside environment in the mounted position. In the sense of the present invention, an inner surface denotes a main surface which is provided for facing the inner space in the mounted position. The inner surface of the outer glass sheet and the outer surface of the inner glass sheet face each other in the composite glass sheet according to the invention.
In the sense of the present invention, an inner glass pane denotes a glass pane facing an interior space (vehicle interior space) if the composite glass pane is provided for separating the interior space from the outside environment in a window opening of a vehicle or a building. The outer glass sheet represents a glass sheet facing the outside environment.
The holographic element according to the invention is composed of at least one layer of holographic material or of at least one layer of holographic material and a substrate layer.
Preferably, the holographic element comprises a photopolymer as the holographic material. The photopolymer according to the invention is advantageously resistant to plasticizers or chemicals from the intermediate layer, in particular from each intermediate layer directly adjacent to the photopolymer layer.
In one advantageous embodiment of the holographic element according to the invention, the thickness of the photopolymer layer is from 5 μm to 300 μm, preferably from 10 μm to 50 μm, for example 16 μm.
In one advantageous embodiment of the composite glass pane according to the invention, the holographic material extends over the entire surface of the composite glass pane, or over substantially the entire surface, i.e. the entire surface minus a circumferential edge region of, for example, 20 mm, which is usually covered by a frame-like dark-colored cover print. In an alternative embodiment, the holographic material may also extend over only a part of the composite glass pane.
The composite glass pane according to the invention comprises two intermediate layers arranged between the outer glass pane and the inner glass pane, wherein the holographic element is arranged between the first intermediate layer and the second intermediate layer.
In an advantageous embodiment of the composite glass pane according to the invention, the holographic element consists exclusively of holographic material. The holographic material is preferably composed of one or more layers of photopolymer, preferably exactly one layer of photopolymer. The thickness of the holographic material is then preferably from 5 μm to 300 μm, particularly preferably from 10 μm to 50 μm, for example 16 μm. Such a layer thickness has the advantage that the layer of holographic material is self-supporting and can be transferred as a film-like layer.
If the holographic element consists only of one or more layers of holographic material, the holographic material and the first intermediate layer and the holographic material and the second intermediate layer are all directly superposed on one another, or in other words directly bonded to one another.
In a further advantageous embodiment of the composite glass pane according to the invention, the holographic element is composed exclusively of at least one layer of holographic material and a substrate layer on which the holographic material is arranged. The holographic material is preferably composed of one or more layers of photopolymer, preferably exactly one layer of photopolymer. The thickness of the holographic material is then preferably from 5 μm to 300 μm, particularly preferably from 10 μm to 50 μm, for example 16 μm. This structure has the advantage that the layer of holographic material can be designed to be thinner, which improves the optical performance of the holographic element.
In such embodiments, the at least one layer of holographic material is directly bonded to the first intermediate layer or the second intermediate layer. The side of the substrate layer facing away from the holographic material is then joined directly to the respective other intermediate layer.
The substrate layer according to the invention advantageously comprises or consists of a layer made of Polyamide (PA), cellulose Triacetate (TAC) and/or polyethylene terephthalate (PET). The layer thickness of the base layer is preferably from 20 μm to 300 μm, particularly preferably from 30 μm to 150 μm, in particular from 35 μm to 60 μm.
In another embodiment, a holographic element according to the present invention comprises a second set of holograms in addition to the first set of holograms made in one or more layers of holographic material. The second set of holograms comprises, for example, blue holograms (which can be activated by blue light having a wavelength in the first range and do not react to light of other wavelengths), green holograms (which can be activated by green light having a wavelength in the second range and do not react to light of other wavelengths), and red holograms (which can be activated by red light having a wavelength in the third range and do not react to light of other wavelengths).
The first intermediate layer and the second intermediate layer are preferably thermoplastic intermediate layers. In an advantageous embodiment, the first thermoplastic interlayer and the second thermoplastic interlayer independently of one another comprise at least polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), Polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably polyvinyl butyral (PVB), particularly preferably polyvinyl butyral (PVB) and additives known to the person skilled in the art, for example plasticizers. Preferably, each intermediate layer is composed of one of the materials just mentioned, independently of the others.
The thickness of each thermoplastic intermediate layer is advantageously from 0.030 mm to 1 mm, preferably from 30 μm to 300 μm, particularly preferably from 50 μm to 100 μm or from 300 μm to 800 μm, for example 380 μm or 760 μm. It is to be understood that the first intermediate layer and the second intermediate layer may be designed to be of the same or different thicknesses.
Alternatively, one or both intermediate layers may comprise or consist of an optically clear adhesive (OCA, English: optically clear adhesive). The thickness of each intermediate layer formed from an optically transparent plastic is advantageously from 0.030 mm to 1 mm, preferably from 30 μm to 300 μm, particularly preferably from 50 μm to 100 μm. Such optically clear adhesives are generally composed of or comprise adhesives based on acrylic or acrylate.
The first intermediate layer and the second intermediate layer may be formed by a single film or layer or may also be formed by more than one film or layer independently of each other.
The first intermediate layer and/or the second intermediate layer can also be functional intermediate layers, in particular intermediate layers having acoustic damping properties, infrared radiation-reflecting intermediate layers, infrared radiation-absorbing intermediate layers, ultraviolet radiation-absorbing intermediate layers, at least partially colored intermediate layers and/or at least partially colored intermediate layers, independently of one another. Thus, the first intermediate layer or the second intermediate layer may also be a bandpass filter film, for example. This applies in particular to the thermoplastic intermediate layer.
To improve adhesion, the surfaces of the glass plate, the intermediate layer, the base layer and/or the photopolymer layer can be chemically pretreated or plasma treated, or a primer can be applied.
The outer and inner glass panes are preferably made of glass, particularly preferably soda lime glass, as is customary for window panes. But these glass plates can also be made of other glass types, such as quartz glass, borosilicate glass or aluminosilicate glass, or of rigid clear plastics, such as polycarbonate or polymethyl methacrylate. These glass sheets may be clear or colored or tinted. If the composite glass pane is used as a windscreen pane, it should have sufficient light transmission in the central viewing zone, preferably at least 70% in the main see-through area a according to ECE-R43.
The outer glass pane, the inner glass pane, the first intermediate layer and/or the second intermediate layer may have suitable coatings known per se, such as, for example, anti-reflection coatings, anti-adhesion coatings, anti-scratch coatings, photocatalytic coatings or sun protection coatings or low-emissivity coatings. Such a coating is advantageously arranged directly on the outer glass pane and/or the inner glass pane. In the case of sun protection coatings, coatings which are as spectrally neutral as possible are preferred, and/or they are preferably applied to the first intermediate layer or to the outer glass pane, in particular to the inner surface of the outer glass pane.
In an advantageous embodiment, no further coating is present between the intermediate layer and the holographic element.
The thickness of the outer and inner glass plates can vary widely and is therefore adapted to the requirements in each case. The outer and inner glass panes preferably have a thickness of 0.5 mm to 5 mm, particularly preferably 1 mm to 3 mm, very particularly preferably 1.6 mm to 2.1 mm. For example, the outer glass sheet has a thickness of 2.1 mm and the inner glass sheet has a thickness of 1.6 mm. However, the outer glass plate or especially the inner glass plate may also be a thin glass having a thickness of, for example, 0.55 mm.
Another aspect of the invention comprises a projection device for displaying information to an observer, comprising at least a composite glass pane according to the invention and a projector which is directed from the inside towards the hologram in the holographic element. The composite glass pane according to the invention can be designed as described above in the various embodiments.
It will be appreciated that if the composite glass sheet according to the invention has a second set of holograms in addition to the first set of holograms, the projector is directed internally to both the first set of holograms and the second set of holograms. Alternatively, the projection device may also comprise two projectors, one of which is directed from the inside towards the first set of holograms and one of which is directed from the inside towards the second set of holograms.
The projector emits light having a wavelength responsive to the holograms of the first set of holograms.
When two sets of holograms are present, the projector, or when two projectors are present, the projectors emit light having a wavelength responsive to both the holograms of the first set of holograms and the holograms of the second set of holograms.
Laser projectors are preferred because of the very discrete wavelengths that can be achieved simply by them.
The invention also relates to a method of manufacturing a composite glass sheet, wherein at least:
a) -providing an outer glass sheet having an outer surface and an inner surface, a first interlayer, a second interlayer and an inner glass sheet having an outer surface and an inner surface,
and
-providing one or more layers of holographic material,
b) forming a layer stack from the outer glass sheet, the first interlayer, the one or more layers of holographic material, the second interlayer and the inner glass sheet (in that order),
c) bonding the layer stacks to each other.
In an advantageous embodiment of the method according to the invention, the intermediate layer is designed as a thermoplastic intermediate layer and the stack of layers is joined by lamination, for example in an autoclave, by a calender process or by other lamination processes.
When using at least one intermediate layer formed from an optically clear adhesive, the joining can also be effected by means of uv light or a temperature increase.
In an advantageous embodiment of the method according to the invention, the holographic element is produced before, during or after steps a), b) or c), by introducing a hologram or a set of holograms into the layer or layers of holographic material, in particular by exposure.
The invention furthermore comprises the use of the composite glass pane according to the invention as an inner or outer glass in a vehicle or building, in particular as a vehicle glass pane in a land, water and air vehicle, in particular in a motor vehicle. The composite glass pane according to the invention is used in particular as a windshield pane, side pane or roof pane, wherein it serves as a projection surface.
The invention is further illustrated by means of the figures and examples. The figures are schematic and not to scale. The drawings are not intended to limit the invention in any way. Wherein:
figure 1 shows a cross section through an embodiment of a projection device 101 according to the invention,
figure 2 shows a cross-section of one embodiment of a composite glass sheet 100 according to the present invention,
FIG. 3 shows a cross-section through another embodiment of a composite glass sheet 100 according to the present invention, an
Fig. 4 shows an embodiment of the method according to the invention by means of a flow chart.
Fig. 1 shows a cross section through an embodiment of a projection device 101 according to the invention. The projection device 101 comprises a composite glass sheet 100, for example according to the embodiment shown in fig. 2 or 3 below, and a projector 18. The projector 18 is arranged, for example, internally, i.e. on the side facing the interior space of the vehicle or building. The optical path of the light emitted from the projector 18 is shown in fig. 1. Light emitted from the projector 18 impinges on the hologram element 4 and activates the hologram. The light emitted by the projector 18 is reflected by the hologram so that, when the observer's eye is located within the so-called eye-movement range E, the hologram is perceived by the observer 10 as a virtual or real image on the side of the composite glass pane 100 facing away from him. The beam path of the light emitted from the projector is illustrated in fig. 1 by the arrows which pass from the projector 18 to the hologram element 4 and from the hologram element 4 to the eye movement range E.
FIG. 2 shows a cross-section of one embodiment of a composite glass sheet 100 according to the present invention. In the embodiment shown in fig. 2, the composite glass sheet 100 comprises an outer glass sheet 1 having an inner surface I and an outer surface II, a first thermoplastic interlayer 3, a holographic element 4, a second thermoplastic interlayer 5, and an inner glass sheet 1 having an outer surface III and an inner surface IV.
In the embodiment shown in fig. 2, the holographic element 4 is arranged between the outer glass plate 1 and the inner glass plate 2. The first thermoplastic layer 3 is arranged between the outer glass plate 1 and the hologram element 4 and is for example directly bonded to the hologram element 4. Furthermore, a second thermoplastic layer 5 is arranged between the hologram element 4 and the inner glass plate 2 and is for example directly joined to the hologram element 4. It should be understood that further transparent or opaque layers, for example infrared-reflecting layers or screen-printed layers, can be arranged on the outer glass pane 1 and/or the inner glass pane 2 and in particular between the outer glass pane 1 and the first intermediate layer 3 and/or between the second intermediate layer 5 and the inner glass pane 2. Furthermore, one or more further transparent layers, for example one or more low-emissivity layers, may be arranged on the inner side IV of the inner glass pane 2.
The outer glass plate 1 is made of soda lime glass, for example, and is 2.1 mm thick. The inner glass plate 2 consists for example of soda lime glass and is 1.6 mm thick.
The first interlayer 3 and the second interlayer 5 are designed as thermoplastic interlayers, for example, and consist of polyvinyl butyral (PVB), for example, in the embodiment shown in fig. 2. They are for example each 0.76 mm thick. It should be understood that one or both of the intermediate layers may also be formed from other materials, such as thermoplastic EVA, thermoplastic PU, or optically clear adhesive. It should also be understood that one or both of the intermediate layers may have other thicknesses, such as 0.38 mm.
In the embodiment shown in fig. 2, the holographic element 4 is composed of a photopolymer as the holographic material.
FIG. 3 shows a cross-section of another embodiment of a composite glass sheet 100 according to the present invention. In the embodiment shown in fig. 3, composite glass sheet 100 comprises an outer glass sheet 1 having an inner surface I and an outer surface II, a first thermoplastic interlayer 3, a holographic element 4, and a second thermoplastic interlayer 5.
The embodiment shown in fig. 3 therefore differs from the embodiment shown in fig. 2 in particular in that the holographic element 4 is composed of a layer of holographic material 16 and a substrate layer 15. The substrate layer 15 is made of, for example, polyethylene terephthalate (PET) and has a thickness of 35 μm.
The holographic material 16 may for example be a photopolymer having a thickness of for example 16 μm. The photopolymer is particularly resistant to plasticizers and other chemicals that are contained in the second intermediate layer 5 and that can diffuse into the layer of holographic material 16.
In the embodiment shown in fig. 3, the outer glass pane 1 is joined to the first thermoplastic interlayer 3 via the inner surface II. The second thermoplastic intermediate layer 5 is joined to the holographic element 4 here, for example, by a substrate layer 15. The holographic element 4 is in turn directly joined to the first thermoplastic intermediate layer 3 by means of that layer of holographic material 16.
The outer glass plate consists for example of soda-lime glass and is 2.1 mm thick. The inner glass plate 2 consists for example of soda lime glass and is 1.6 mm thick.
The first thermoplastic interlayer 3 and the second thermoplastic interlayer 5 consist, in the embodiment shown in fig. 1, for example of polyvinyl butyral (PVB) and are each 0.38 mm thick. It should be understood that the materials mentioned in fig. 2 and combinations of materials and layer thicknesses are also possible here.
Fig. 4 shows, by means of a flow chart, one exemplary embodiment of a method according to the invention for producing a composite glass pane 100 according to the invention, comprising the following steps:
p1 provides an outer glass sheet 1 having an outer surface I and an inner surface II, a first thermoplastic interlayer 3, a second thermoplastic interlayer 5, and an inner glass sheet 2 having an outer surface III and an inner surface IV;
p2 provides a holographic element 4 by making a hologram or set of holograms in one or more layers of holographic material 16;
p3 is formed into a layer stack from an outer glass sheet 1, a first thermoplastic interlayer 3, a holographic element 4, a second thermoplastic interlayer 5 and an inner glass sheet 2; and
p4 the stack of layers was joined by lamination.
It should be understood that without limiting the method according to the invention, steps P1 and P2 may be interchanged.
An alternative embodiment of making a composite glass sheet according to the present invention comprises the steps of:
p1 provides an outer glass sheet 1 having an outer surface I and an inner surface II, a first thermoplastic interlayer 3, a second thermoplastic interlayer 5, and an inner glass sheet 2 having an outer surface III and an inner surface IV;
p2 providing one or more layers of holographic material;
p3 is formed into a layer stack from an outer glass sheet 1, a first thermoplastic interlayer 3, one or more layers of holographic material 16, a second thermoplastic interlayer 5 and an inner glass sheet 2;
p4 joining the stack of layers by lamination; and
p5 creates the holographic element 4 in the laminated layer stack by introducing a hologram or set of holograms into the layer or layers of holographic material 16, preferably by exposure to light.
List of reference numerals
1 outer glass plate
2 inner glass plate
3 first intermediate layer
4 holographic element
5 second intermediate layer
10 vehicle driver/observer
15 base layer
16 holographic material
18 projector
100 composite glass plate
101 projection device
I outer surface of outer glass pane 1
II inner surface of outer glass pane 1
III outer surface of the inner glass pane 2
IV inner surface of the inner glass pane 2
E eye movement range.

Claims (15)

1. Composite glass pane (100) comprising at least a stacking sequence formed by
-an outer glass plate (1),
-a first intermediate layer (3),
-a holographic element (4) comprising at least one hologram or at least one set of holograms, said holograms being made in one or more layers of holographic material (16),
-a second intermediate layer (5), and
-an inner glass pane (2),
wherein
Holographic element (4)
-is composed of at least one layer of holographic material (16) or
-is composed of at least one layer of holographic material (16) and a substrate layer (15), and
wherein the holographic material (16) and the first intermediate layer (3) and/or the holographic material (16) and the second intermediate layer (5) are directly bonded to each other.
2. The composite glass pane (100) according to claim 1, wherein the first interlayer (3) and/or the second interlayer (5) comprises or consists of at least one thermoplastic interlayer, preferably formed from polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA), Polyurethane (PU) or mixtures or copolymers or derivatives thereof, preferably polyvinyl butyral (PVB) and additives known to the person skilled in the art, in particular plasticizers.
3. The composite glass pane (100) according to claim 1 or 2, wherein the first interlayer (3) and/or the second interlayer (5) comprises or consists of an optically clear adhesive.
4. The composite glass pane (100) according to any of claims 1 to 3, wherein the thickness of the intermediate layer (3, 5) is 0.30 mm to 1 mm, preferably 30 μm to 300 μm, particularly preferably 50 μm to 100 μm.
5. The composite glass pane (100) according to any of claims 1 to 4, wherein the holographic material (16) comprises or consists of at least one layer of photopolymer.
6. The composite glass pane (100) according to claim 5, wherein the thickness of each layer of photopolymer is from 10 μm to 300 μm, preferably from 10 μm to 50 μm.
7. The composite glass pane (100) according to any of claims 1 to 6, wherein the holographic material (16) and the first interlayer (3) and/or the holographic material (16) and the second interlayer (5) are directly bonded to each other.
8. The composite glass pane (100) according to any one of claims 1 to 7, wherein the photopolymer is resistant to plasticizers or chemicals from the directly adjoining interlayer (3, 5).
9. The composite glass pane (100) according to any of claims 1 to 8, wherein the substrate layer (15) comprises or consists of a layer formed of Polyamide (PA), cellulose Triacetate (TAC) or polyethylene terephthalate (PET).
10. The composite glass pane (100) according to any one of claims 1 to 9, wherein the thickness of the substrate layer (15) is 20 μ ι η to 300 μ ι η, preferably 30 μ ι η to 150 μ ι η, particularly preferably 35 μ ι η to 60 μ ι η.
11. Composite glass pane (100) according to any one of claims 1 to 10, wherein the interlayer (3, 5) is a functional interlayer, in particular an interlayer having acoustic damping properties, in particular acoustic PVB, an infrared radiation reflecting interlayer, an infrared radiation absorbing interlayer, an ultraviolet radiation absorbing interlayer, an at least partially coloured interlayer and/or an at least partially coloured interlayer.
12. Method for manufacturing a composite glass pane (100), at least
a) Providing an outer glass pane (1), a first intermediate layer (3), a second intermediate layer (5) and an inner glass pane (2),
and
providing one or more layers of holographic material (16),
b) forming a layer stack from the outer glass sheet (1), the first intermediate layer (3), the one or more layers of holographic material (16), the second intermediate layer (5) and the inner glass sheet (2),
c) bonding the layer stack.
13. Method according to claim 12, wherein the first intermediate layer (3) and the second intermediate layer (5) are provided as thermoplastic intermediate layers and the stack of layers is joined by lamination.
14. The method according to claim 12 or 13, wherein a holographic element (4) is produced before, during or after steps a), b) or c), by introducing a hologram or a set of holograms into the layer or layers of holographic material (16), in particular by exposure to light.
15. Use of a composite glass pane (100) according to any one of claims 1 to 11 as an inner or outer glass in a vehicle or building, in particular as a vehicle glass pane in a land, water and air vehicle, in particular in a motor vehicle, in particular as a windscreen pane, side glass pane or roof glass pane serving as a projection surface.
CN202180001824.9A 2020-06-03 2021-05-31 Composite glass pane with holographic element Pending CN114096409A (en)

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