WO2023144085A1 - Vitre composite dotée d'un élément hologramme et d'un revêtement antireflet - Google Patents

Vitre composite dotée d'un élément hologramme et d'un revêtement antireflet Download PDF

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Publication number
WO2023144085A1
WO2023144085A1 PCT/EP2023/051552 EP2023051552W WO2023144085A1 WO 2023144085 A1 WO2023144085 A1 WO 2023144085A1 EP 2023051552 W EP2023051552 W EP 2023051552W WO 2023144085 A1 WO2023144085 A1 WO 2023144085A1
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WO
WIPO (PCT)
Prior art keywords
pane
layer
intermediate layer
hologram element
laminated
Prior art date
Application number
PCT/EP2023/051552
Other languages
German (de)
English (en)
Inventor
Andreas GOMER
Jan Hagen
Pauline GIRARD
Oliver GIER
Original Assignee
Saint-Gobain Glass France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Glass France filed Critical Saint-Gobain Glass France
Priority to CN202380008191.3A priority Critical patent/CN116829351A/zh
Publication of WO2023144085A1 publication Critical patent/WO2023144085A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/73—Anti-reflective coatings with specific characteristics
    • C03C2217/734—Anti-reflective coatings with specific characteristics comprising an alternation of high and low refractive indexes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G02B2027/0105—Holograms with particular structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
    • G02B2207/107—Porous materials, e.g. for reducing the refractive index
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/32—Antireflective layer

Definitions

  • the invention relates to a laminated pane with a hologram element and an anti-reflection coating, a method for producing such a laminated pane, and the use of such a laminated pane.
  • Composite glazing is used in many places today, particularly in vehicle construction.
  • vehicle includes, among other things, road vehicles, aircraft, ships, agricultural machines or also work equipment.
  • Composite panes are also used in other areas. These include, for example, building glazing or information displays, e.g. in museums or as advertising displays.
  • Laminated windows are also often used as a head-up display (HUD) to display information.
  • An image is projected onto the laminated glass panes by means of an imaging unit in order to display information in the viewer's field of vision.
  • the imaging unit is arranged, for example, on the dashboard so that the projected image is reflected on the nearest glass surface of the laminated glass pane tilted towards the viewer (cf. e.g. European Patent EP 0 420 228 B1 or German Offenlegungsschrift DE 10 2012 211 729 A1).
  • Head-up displays in which the projected image is reflected in the direction of the viewer on the nearest glass surface of the laminated glass pane inclined towards the viewer, are subject to the law of reflection, according to which the angle of incidence and the angle of emission are equal.
  • the angle of inclination of the laminated glass pane can therefore not be chosen freely.
  • Hologram elements that are laminated between the panes of a composite pane can also be used for head-up displays.
  • the hologram element includes at least one hologram, and the hologram may include information recorded thereon.
  • the hologram can be activated by means of light emitted from a projector and thus the information recorded in the hologram for the viewer be played back.
  • Head-up displays based on the principle of holography so-called holographic head-up displays are, for example, in the publications WO 2012/156124 A1, US 2019/0056596 A1, US 10,394,032 B2, US 10,061, 069 B2 and US 2015/ 205138 A1.
  • WO 2021/180471 A1, WO 2021/233713 A1, WO 2021/245031 A1, WO 2021/254872 A1 and WO 2021/254873 A1 disclose composite panes with a hologram element, it being possible for the first and/or the second pane of the composite pane to have anti-reflection coatings.
  • WO 2019/179682 A1 discloses a composite pane for a head-up display with an electrically conductive coating and an anti-reflection coating.
  • EP 3 998 501 A2 discloses a system having anti-reflection coatings to prevent the formation of Fresnel reflections during reflection hologram formation.
  • DE 10 2020 112 447 A1 discloses a method for integrating a hologram in a rigid component with a predetermined target surface geometry using a hologram recording layer made of a liquid photopolymer.
  • a hologram can be created in a holographic material, ie a photosensitive material, which is laminated between the panes of a laminated pane.
  • a holographic material ie a photosensitive material, which is laminated between the panes of a laminated pane.
  • the so-called reference beam which can also be referred to as a reference wave
  • the so-called object beam which can also be referred to as an object wave
  • the resulting interference pattern of the superimposed wavefronts is written into the holographic material as an alternating refractive index modulation. If the reference wave and the object wave have parallel wave fronts, the interference pattern corresponds to a parallel grating whose lamellae are angled at the bisector of the reference wave and the object wave.
  • the holographic material After recording, the holographic material is cured, losing the ability to record additional holograms. If the holographic material in which the hologram was recorded is again irradiated with the reference wave, the light is diffracted at the recorded grating of the hologram in such a way that the diffracted Wave corresponds to the object wave. Thus, by illuminating the interference pattern written in the holographic material with the reference wave, the object wave can be reconstructed.
  • Head-up displays in which the projected image is reproduced in the direction of the viewer by means of a hologram, thus enable the production of composite panes with laminated holograms, in which the angle of incidence on the composite pane is not as large as the angle of emission. Consequently, the angle of inclination of the laminated pane can be chosen more freely in holographic head-up displays.
  • the object of the present invention is to provide an improved laminated pane with a hologram element, in particular for a head-up display, in which the occurrence of undesirable ghost images and/or the degree of reflection of the laminated pane is minimized.
  • the object of the present invention is solved by a laminated pane according to independent claim 1 .
  • Preferred embodiments emerge from the dependent claims.
  • a method for producing a composite pane according to the invention and its use emerge from further independent claims.
  • the invention relates to a laminated pane at least comprising an outer pane with an outside surface and an inside surface, an inner pane with an outside surface and an inside surface, a first intermediate layer and a hologram element with at least one hologram.
  • the first intermediate layer is arranged between the outer pane and the inner pane and the hologram element is arranged between the outer pane and the first intermediate layer or between the inner pane and the first intermediate layer.
  • an antireflection coating is arranged on the interior-side surface of the inner pane.
  • the outer pane and the inner pane each have an outside surface, i.e. an outer surface, and an interior surface, i.e. an inner surface, and a peripheral side edge extending therebetween.
  • the outside surface designates that main surface which is intended to face the external environment in the installed position.
  • the interior-side surface designates that main surface which is intended to face the interior in the installed position.
  • the surfaces of the glass panes are typically designated as follows:
  • the outside surface of the outer pane is referred to as side I.
  • the surface of the outer pane on the interior side is referred to as side II.
  • the outside surface of the inner pane is referred to as Side III.
  • the interior side surface of the inner pane is referred to as side IV.
  • the inner pane in the context of the invention refers to the pane facing the interior (vehicle interior).
  • the outer pane refers to the pane facing the outside environment.
  • the hologram element refers to the holographic medium in which the hologram is contained.
  • the hologram element comprises a photosensitive material, ie a holographic material.
  • a hologram can be recorded in this by exposure to a suitable light source.
  • the material of the hologram element is no longer sensitive to light, since the holographic material is changed so much during the process that it is no longer possible to record a hologram.
  • the hologram element comprises a holographic material and can additionally optionally comprise a first substrate layer and/or a second substrate layer. Suitable holographic materials are known to those skilled in the art. Suitable first and second substrate layers are also known to those skilled in the art.
  • the hologram element preferably comprises a photopolymer, dichromated gelatin or silver halide gelatin as holographic material, particularly preferably a photopolymer.
  • Silver halides or dichromates are generally used in a gelatine matrix, which is usually initially dried at room temperature before a hologram can be recorded by exposure.
  • the holographic material is formed as a coating on the interior-side surface of the outer pane or as a coating on the outside surface of the inner pane.
  • the laminated pane can additionally comprise a second intermediate layer.
  • the hologram element is arranged between the first intermediate layer and the inner pane and the additional second intermediate layer is arranged between the inner pane and the hologram element.
  • the hologram element comprises a holographic material, a first substrate layer and a second substrate layer, the holographic material being arranged between the first intermediate layer and the inner pane, a second intermediate layer being arranged between the holographic material and the inner pane, between the holographic material and the first intermediate layer is arranged the first substrate layer and between the holographic material and the second intermediate layer the second substrate layer is arranged.
  • the holographic material is consequently arranged between a first substrate layer and a second substrate layer.
  • the hologram element comprises a first substrate layer and a holographic material.
  • the laminated pane can optionally comprise a second intermediate layer. If a second intermediate layer is present, this is arranged between the inner pane and the hologram element and the first intermediate layer is arranged between the outer pane and the hologram element.
  • the hologram element comprises a second substrate layer and a holographic material.
  • the first intermediate layer is preferably a thermoplastic intermediate layer, an adhesive layer or an optically clear adhesive (OCA).
  • OCA optically clear adhesive
  • the second intermediate layer is preferably a thermoplastic intermediate layer, an adhesive layer or an optically clear adhesive (OCA).
  • OCA optically clear adhesive
  • An optically clear adhesive is characterized by high light transmission, low turbidity, no double refraction, high UV resistance and good aging resistance. Uncontrolled and therefore undesirable impairments in light transmission or unaesthetic distortions can be avoided in this way.
  • the adhesive layer preferably has an absorption in the visible spectral range of less than 5%, in particular less than 2% or even 1% and preferably a turbidity of less than 5%, in particular less than 2% or even less than 1%.
  • the adhesive layer is preferably designed as a homogeneous layer.
  • the adhesive layer preferably has a thickness of from 20 ⁇ m to 200 ⁇ m, particularly preferably from 50 ⁇ m to 150 ⁇ m, very particularly preferably from 60 ⁇ m to 100 ⁇ m. This achieves good optical properties.
  • adhesive layers with these thicknesses are commercially available as adhesive films.
  • the adhesive of the adhesive layer can also be used as a liquid adhesive.
  • the adhesive of the adhesive layer is preferably a chemically active, in particular chemically curing adhesive or UV-curing, particularly preferably an acrylate adhesive or a silicone-based adhesive.
  • the first substrate layer contains, for example, polyamide (PA), cellulose triacetate (TAC) and/or polyethylene terephthalate (PET).
  • PA polyamide
  • TAC cellulose triacetate
  • PET polyethylene terephthalate
  • the first substrate layer is, for example, 35 pm (microns) to 60 pm thick.
  • the second substrate layer contains, for example, polyamide (PA), cellulose triacetate (TAC) and/or polyethylene terephthalate (PET).
  • PA polyamide
  • TAC cellulose triacetate
  • PET polyethylene terephthalate
  • the second substrate layer is, for example, 35 ⁇ m (microns) to 60 ⁇ m thick.
  • the holographic material comprises a photopolymer.
  • the photopolymer is for example 10 ⁇ m to 100 ⁇ m thick, for example 16 ⁇ m. Suitable photopolymers are known to those skilled in the art.
  • the photopolymer preferably comprises crosslinked polyurethane (PU). Alternatively, a liquid photopolymer can also be used.
  • the antireflection coating can be designed in different ways.
  • antireflection coatings made of porous silicon dioxide layers are known.
  • the antireflection coating is formed from alternating layers with different refractive indices, which lead to a reduction in reflection at the coated surface due to interference effects.
  • Such coatings are very effective and can be easily optimized to meet individual requirements by selecting the materials and layer thicknesses of the individual layers.
  • the antireflection coating is formed on the basis of nanoporous silicon oxide.
  • Such an antireflection coating can be configured, for example, as described in WO 2021/156023 A1.
  • the anti-reflection coating is formed from alternatingly arranged layers with different refractive indices.
  • the antireflection coating preferably comprises at least two optically high refractive layers, in particular with a refractive index greater than 1.8, and two optically low refractive layers, in particular with a refractive index less than 1.8.
  • the high-index layers can be based on silicon nitride, zinc tin oxide, silicon zirconium nitride or titanium oxide, for example, and the low-index layers can be based on silicon dioxide or magnesium fluoride, for example.
  • refractive indices are generally given in relation to a wavelength of 550 nm. Methods for determining refractive indices are known to those skilled in the art. The refractive indices specified within the scope of the invention can be determined, for example, by means of ellipsometry, with commercially available ellipsometers being able to be used.
  • the anti-reflection coating starting from the interior surface of the inner pane, consists of a 19 nm thick silicon nitride layer, a 23 nm thick silicon dioxide layer arranged thereon, a 114 nm thick zinc-tin oxide layer arranged thereon and a 97 nm layer arranged thereon thick silicon dioxide layer formed.
  • the anti-reflection coating is formed, starting from the interior surface of the inner pane, from a 13 nm thick silicon nitride layer, a 29 nm thick silicon dioxide layer arranged thereon, a 94 nm thick silicon nitride layer arranged thereon and an 89 nm thick silicon dioxide layer arranged thereon.
  • the anti-reflection coating starting from the interior-side surface of the inner pane, comprises exactly one high-index layer and exactly one low-index layer, the high-index layer having a refractive index greater than 1.9 and a thickness of at most 40 nm, preferably at most 30 nm. particularly preferably not more than 20 nm, very particularly preferably not more than 15 nm, and the low-index layer has a refractive index of less than 1.6 and a thickness of not more than 60 nm, preferably not more than 50 nm, particularly preferably not more than 40 nm, very particularly preferably of at most 30 nm.
  • the high-index layer is preferably formed on the basis of silicon nitride, tin-zinc oxide, silicon-zirconium nitride, silicon-titanium nitride, silicon-hafnium nitride or titanium oxide, particularly preferably Based on silicon zirconium nitride or titanium oxide, and the low-index layer is preferably formed based on silicon dioxide or doped silicon oxide.
  • a protective layer can be applied to the anti-reflection coating.
  • the protective layer is preferably applied transparently and areally, in particular congruently, to the antireflection coating.
  • the protective layer is preferably a polymer based on polyacrylates, polyoximes, alkyd resins, polyurethanes or mixtures thereof.
  • the protective layer preferably has a thickness of 50 nm to 10 ⁇ m and particularly preferably 100 nm to 5 ⁇ m.
  • the protective layer protects the anti-reflective coating from mechanical damage such as scratches. It can also serve to increase the durability of the anti-reflective coating.
  • a UV protection layer is arranged in the laminated pane according to the invention between the outer pane and the holographic material. Such a UV protection layer prevents aging processes of the holograms recorded in the holographic material caused by UV radiation from the outside.
  • the outer pane and the inner pane are made of glass, particularly preferably of soda-lime glass, as is customary for window panes.
  • the outer pane and the inner pane can also be made from other types of glass, for example quartz glass, borosilicate glass or alumino-silicate glass, or from rigid, clear plastics, for example polycarbonate or polymethyl methacrylate.
  • the outer pane and the inner pane can be clear, independently of one another, or else tinted or tinted.
  • Composite panes designed as windshields must have sufficient light transmission in the central viewing area, preferably at least 70% in the main viewing area A in accordance with ECE-R43.
  • the outer pane and the inner pane are preferably curved, ie they have a curvature.
  • a first intermediate layer or second intermediate layer designed as a thermoplastic intermediate layer preferably contains at least polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) or copolymers or derivatives thereof or consists of them, particularly preferably polyvinyl butyral (PVB), very particularly preferably polyvinyl butyral (PVB ) and additives known to those skilled in the art, such as plasticizers.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PVB polyurethane
  • additives known to those skilled in the art, such as plasticizers.
  • a first intermediate layer or second intermediate layer designed as a thermoplastic intermediate layer preferably contains at least 60% by weight, particularly preferably at least 70% by weight, in particular at least 90% by weight and for example at least 97% by weight, of polyvinyl butyral.
  • a first intermediate layer designed as a thermoplastic intermediate layer can be formed by a single film or by more than one film.
  • a second intermediate layer designed as a thermoplastic intermediate layer can also be formed by a single film or by more than one film.
  • the first intermediate layer and, if present, the second intermediate layer can, independently of one another, also be a functional intermediate layer, in particular an intermediate layer with acoustically dampening properties, an intermediate layer which reflects infrared radiation, an intermediate layer which absorbs infrared radiation, an intermediate layer which absorbs UV radiation, an intermediate layer which is colored at least in sections and/or or an intermediate layer that is tinted at least in sections.
  • the first intermediate layer and, if present, the second intermediate layer can also be, for example, a band filter film independently of one another.
  • the thickness of a first intermediate layer or second intermediate layer designed as a thermoplastic intermediate layer is between 30 ⁇ m and 1500 ⁇ m, preferably between 50 ⁇ m and 780 ⁇ m, preferably between 380 ⁇ m and 760 ⁇ m.
  • the hologram element preferably has a thickness of 5 ⁇ m to 500 ⁇ m, preferably 10 ⁇ m to 200 ⁇ m and particularly preferably 15 ⁇ m to 150 ⁇ m.
  • the thickness of the outer pane and the inner pane can vary widely and can thus be adapted to the requirements of the individual case.
  • the outer pane and the inner pane are preferably 0.5 mm to 5 mm thick, particularly preferably 1 mm to 3 mm thick.
  • the laminated pane according to the invention can comprise one or more additional intermediate layers, in particular functional intermediate layers.
  • An additional intermediate layer can in particular be an intermediate layer with acoustically dampening properties, an intermediate layer reflecting infrared radiation, an intermediate layer absorbing infrared radiation, an intermediate layer colored at least in sections and/or an intermediate layer tinted at least in sections. If several additional intermediate layers are present, these can also have different functions.
  • a laminated pane according to the invention can additionally include a cover print, in particular made of a dark, preferably black, enamel.
  • the masking print is in particular a peripheral, i.e. frame-like, masking print.
  • the peripheral masking print primarily serves as UV protection for the assembly adhesive of the laminated pane.
  • the cover print can be opaque and full-surface.
  • the cover print can also be semi-transparent, at least in sections, for example as a dot grid, stripe grid or checkered grid.
  • the covering print can also have a gradient, for example from an opaque covering to a semi-transparent covering.
  • the hologram element preferably does not reach the edge of the pane, while the first intermediate layer extends to the edge of the pane.
  • the hologram element in the laminated pane is sealed at its peripheral edge by the first intermediate layer or other layers arranged there and is thus protected from external influences such as moisture and cleaning agents.
  • a blocking film with a cutout is preferably arranged in the form of a frame around the hologram element.
  • the section corresponds to the area in which the hologram element is arranged.
  • the hologram element is arranged within this section and completely fills it out.
  • the barrier film has the shape of a surrounding frame and stands in direct contact with the peripheral edge of the hologram element. The hologram element and the barrier film are thus in the same plane and touch each other along their edges, with their contact surface being essentially orthogonal to the pane surfaces of the laminated pane.
  • the blocking film in the form of a peripheral frame compensates for a local difference in thickness between the area with the hologram element and the surrounding area.
  • the blocking film does not overlap the hologram element, but rather is only attached in its immediate vicinity adjacent to the peripheral edge of the hologram element, which makes it possible to compensate for differences in thickness. Accordingly, the laminated pane with a hologram element not only has improved resistance to aging, but also improved durability by minimizing stresses and glass breakage.
  • the barrier film is preferably a polymer layer and preferably contains or consists of polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyamide (PA), polyethylene (PE), polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), cellulose triacetate (TAC). essentially from it.
  • PVB polyvinyl butyral
  • PET polyethylene terephthalate
  • PA polyamide
  • PE polyethylene
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • PVC polyvinyl chloride
  • TAC cellulose triacetate
  • the laminated pane according to the invention is preferably curved in one or more spatial directions, as is customary for motor vehicle panes, with typical radii of curvature being in the range from about 10 cm to about 40 m.
  • the laminated glass can also be flat, for example if it is intended as a pane for buses, trains or tractors.
  • a laminated pane according to the invention has an upper edge and a lower edge as well as two side edges running between the upper edge and the lower edge.
  • the top edge designates that edge which is intended to point upwards in the installation position.
  • the lower edge designates that edge which is intended to point downwards in the installation position.
  • the upper edge is often referred to as the roof edge and the lower edge as the engine edge.
  • Composite panes designed as windshields have a central field of vision, the optical quality of which is subject to high requirements.
  • the central field of view must have high light transmission (typically greater than 70%).
  • Said central field of view is in particular that field of view which the person skilled in the art calls field of view B, Field of View B or Zone B is called.
  • Field of view B and its technical requirements are specified in United Nations Economic Commission for Europe (LIN/ECE) Control No. 43 (ECE-R43, "Uniform Conditions for the Approval of Safety Glazing Materials and Their Installation in Vehicles").
  • EAE-R43 European Economic Commission for Europe
  • the hologram element is advantageously arranged within the central field of view (field of view B) in a composite pane designed as a windshield.
  • the hologram element can, but does not have to, cover the entire area and can also protrude beyond it.
  • the hologram element preferably extends over at least 30%, particularly preferably over at least 50%, further particularly preferably over at least 80% of the pane. In this way, visible transitions between the hologram element and a section without a hologram element in the visible area of the pane can be avoided.
  • the hologram element is particularly preferably arranged in such a way that the peripheral edge of the hologram element is arranged in the area of an opaque cover print.
  • the opaque cover print covers the transition from the hologram element to the surrounding layer.
  • the masking print is usually in the edge area of the pane and hides the view of attachments or bonding.
  • Windshields typically have an all-round peripheral masking print made of an opaque enamel, which serves in particular to protect the adhesive used to install the windshield from UV radiation and to conceal it from view.
  • This peripheral masking print is preferably used to also mask the peripheral edge of the hologram element.
  • Both the outer pane and the inner pane of the laminated pane preferably have a masking print, so that the view through the edge area is prevented from both sides.
  • the hologram element can also have recesses or holes, for example in the area of so-called sensor windows or camera windows. These areas are intended to be equipped with sensors or cameras whose function could be affected by a hologram element in the beam path.
  • the hologram element is preferably arranged over the entire width and the entire height of the laminated pane, particularly preferably minus a peripheral edge area with a width of, for example, 5 mm to 50 mm.
  • the hologram element is thus protected from contact with the surrounding atmosphere and corrosion.
  • the width of the surrounding edge area can be constant or vary.
  • the laminated pane can be, for example, the windshield or the roof pane of a vehicle or other vehicle glazing, for example a partition pane in a vehicle, preferably in a rail vehicle or a bus.
  • the laminated pane can be architectural glazing, for example in an exterior facade of a building, or a separating pane inside a building.
  • the invention also includes a projection arrangement for displaying information for an observer, at least comprising a laminated pane according to the invention and a projector which is directed onto the hologram element from the inside.
  • a projection arrangement for displaying information for an observer at least comprising a laminated pane according to the invention and a projector which is directed onto the hologram element from the inside.
  • the composite pane according to the invention can be designed as described above in the various embodiments.
  • the projector of the projection arrangement emits light with wavelengths to which the hologram or, if more than one hologram is present, the holograms of the hologram element respond.
  • an undesired reflection of the light emitted by the projector on the interior-side surface of the inner pane of the laminated pane is minimized by the anti-reflection coating.
  • the invention also relates to a method for producing a composite pane, wherein at least: a) an outer pane with an outside surface and an inside surface, a first intermediate layer, a hologram element with at least one hologram and an inner pane with an outside surface and an inside surface and a antireflection coating applied to the interior surface, b) a layer stack is formed in which the first intermediate layer is arranged between the outer pane and the inner pane and the hologram element is arranged between the outer pane and the first intermediate layer or between the inner pane and the first intermediate layer, c) the layer stack is connected by lamination.
  • the hologram element can contain, for example, dichromated gelatin or silver halide gelatin or a photopolymer as the holographic material as described above.
  • the anti-reflection coating is applied to the interior-side surface of the inner pane before lamination.
  • step a it is also possible to apply the antireflection coating to the interior-side surface of the inner pane only after the lamination, so that an uncoated inner pane is initially provided in step a).
  • a laminated pane wherein at least: a) an outer pane with an outside surface and an inside surface, a first intermediate layer, a hologram element with at least one hologram and an inner pane with an outside surface and an inside surface are provided , b) a layer stack is formed in which the first intermediate layer is arranged between the outer pane and the inner pane and the hologram element is arranged between the outer pane and the first intermediate layer or between the inner pane and the first intermediate layer, c) the layer stack is connected by lamination d) an anti-reflection coating is applied to the interior-side surface of the inner pane.
  • step a) instead of a hologram element in which at least one hologram is recorded, an unexposed hologram element precursor made of light-sensitive material can also be provided as an alternative.
  • step b) the layer stack can also be formed and in step c) the lamination with the unexposed hologram element precursor or with the final hologram element with a recorded hologram element can take place.
  • a method according to the invention when providing the unexposed hologram element precursor in step a) as an additional step after the lamination of Layer stack comprises recording at least one hologram in the hologram element precursor.
  • the layer stack is preferably laminated under the action of heat, vacuum and/or pressure.
  • Methods known per se can be used for lamination, for example autoclave methods, vacuum bag methods, vacuum ring methods, calendering methods, vacuum laminators or combinations thereof.
  • the outer pane and the inner pane are preferably subjected to a bending process before lamination.
  • the outer pane and the inner pane are preferably bent congruently together (i.e. at the same time and using the same tool), because the shape of the panes is then optimally matched to one another for the lamination that takes place later.
  • Typical temperatures for glass bending processes are 500°C to 700°C, for example.
  • Any opaque cover prints that may be present i.e. in particular black prints running around the edges of the pane, are preferably applied using the screen printing process.
  • the invention also includes the use of a composite pane according to the invention with at least one hologram as interior glazing or exterior glazing in a vehicle or a building, in particular as a vehicle pane in means of transport for traffic on land, in the air or on water, in particular in motor vehicles and in particular as a windshield , which serves as a projection surface for a head-up display.
  • FIG. 1 shows a plan view of an embodiment of a laminated pane 100 according to the invention
  • Fig. 2 shows a cross section through the embodiment of a laminated pane 100 according to the invention shown in Fig. 1,
  • FIG. 3 shows a cross section through a further embodiment of a laminated pane 100 according to the invention
  • FIG. 4 shows a cross section through a further embodiment of a laminated pane 100 according to the invention
  • FIG. 5 shows a cross section of an embodiment of a hologram element
  • FIG. 6 shows a cross section of a further embodiment of a hologram element
  • FIG. 7 shows a cross section of a further embodiment of a hologram element
  • FIG. 8 shows a cross section of an embodiment of a laminated pane according to the invention
  • FIG. 10 shows a cross section of a further embodiment of a composite pane according to the invention.
  • FIG. 11 shows an exemplary embodiment of a method according to the invention using a flowchart.
  • FIG. 1 shows a plan view of an embodiment of a composite pane 100 according to the invention
  • FIG. 2 shows the cross section through the embodiment of a composite pane 100 according to the invention shown in FIG. 1 along the section line X-X'.
  • the laminated pane 100 has an upper edge O, a lower edge U and two side edges S.
  • the laminated pane 100 comprises an outer pane 1 with an outside surface I and an inside surface II, a first intermediate layer 3, a hologram element 4, an inner pane 2 with an outside surface III and an inside surface IV and a Anti-reflection coating 6.
  • the hologram element 4 is arranged over the entire surface between the outer pane 1 and the inner pane 2
  • the first intermediate layer 3 is arranged over the entire surface between the outer pane 1 and the hologram element 4
  • the anti-reflection coating 6 is arranged over the entire surface arranged on the interior-side surface IV of the inner pane 2 .
  • the outer pane 1 consists, for example, of soda-lime glass and is 2.1 mm thick.
  • the inner pane 2 consists, for example, of soda-lime glass and is 1.6 mm thick.
  • the first intermediate layer 3 is, for example, a thermoplastic intermediate layer and consists, for example, of polyvinyl butyral (PVB) and is 0.76 mm thick.
  • the hologram element 4 is designed, for example, as shown in FIG. 5 or 7.
  • FIG. 7 If the hologram element 4 is configured as shown in FIG. 7 , the hologram element 4 is preferably arranged in such a way that the first substrate layer 8 is arranged directly adjacent to the first intermediate layer 3 .
  • FIG. 3 shows a cross section of a further embodiment of a laminated pane 100 according to the invention.
  • the composite pane 100 shown in cross section in FIG. 3 differs from that shown in FIG. 2 only in that the first intermediate layer 3 is arranged between the inner pane 2 and the hologram element 4 .
  • the hologram element 4 is designed, for example, as shown in FIG. 5 or 7 . If the hologram element 4 is configured as shown in FIG. 7 , the hologram element 4 is preferably arranged in such a way that the first substrate layer 8 is arranged directly adjacent to the first intermediate layer 3 .
  • FIG. 4 shows a cross section of a further embodiment of a laminated pane 100 according to the invention.
  • the composite pane 100 shown in cross section in FIG. 4 differs from that shown in FIG. 2 in that a second intermediate layer 7 is arranged between the hologram element 4 and the inner pane 2 .
  • the second intermediate layer 7 is, for example, a thermoplastic intermediate layer and consists, for example, of polyvinyl butyral (PVB) and is 0.76 mm thick.
  • PVB polyvinyl butyral
  • the hologram element 4 is designed, for example, as shown in FIG. 5, 6 or 7.
  • FIG. 5 the hologram element 4 is designed, for example, as shown in FIG. 5, 6 or 7.
  • FIG. 5 shows a cross-section of an embodiment of a hologram element 4.
  • the holographic material 5 is, for example, a photopolymer, dichromated gelatin or silver halide gelatin.
  • Fig. 6 shows a cross section of another embodiment of a hologram element 4.
  • the hologram element 4 comprises a first substrate layer 8, a second substrate layer 9 and a holographic material 5 arranged therebetween.
  • the holographic material 5 is for example a photopolymer, dichromated gelatin or silver halide gelatin.
  • the hologram element 4 comprises a first substrate layer 8 and a holographic material 5.
  • the holographic material 5 is, for example, a photopolymer, dichromated gelatin or silver halide gelatin.
  • FIG. 8 shows a cross section of a further embodiment of a laminated pane 100 according to the invention.
  • the laminated pane 100 shown in cross section in FIG. 8 differs from that shown in FIG. 2 only in that a protective layer 10 is arranged on the antireflection coating 6 .
  • the protective layer 10 is arranged on the surface of the anti-reflection coating 6 facing away from the inner pane 2 .
  • FIG. 9 shows a cross section of a further embodiment of a laminated pane 100 according to the invention.
  • the laminated pane 100 shown in cross section in FIG. 9 differs from that shown in FIG. 3 only in that a protective layer 10 is arranged on the antireflection coating 6 .
  • the protective layer 10 is arranged on the surface of the anti-reflection coating 6 facing away from the inner pane 2 .
  • FIG. 10 shows a cross section of a further embodiment of a laminated pane 100 according to the invention.
  • the laminated pane 100 shown in cross section in FIG. 10 differs from that shown in FIG. 4 only in that a protective layer 10 is arranged on the antireflection coating 6 .
  • the protective layer 10 is arranged on the surface of the anti-reflection coating 6 facing away from the inner pane 2 .
  • 11 shows an exemplary embodiment of the method according to the invention for producing a laminated pane 100 according to the invention using a flowchart, comprising the steps:

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

L'invention concerne une vitre composite (100), comprenant au moins une vitre extérieure (1) avec une surface côté extérieur (I) et une surface côté intérieur (II), une vitre intérieure (2) avec une surface côté extérieur (III) et une surface côté intérieur (IV), une première couche intermédiaire (3) et un élément hologramme (4) avec au moins un hologramme, la première couche intermédiaire (3) étant disposée entre la vitre extérieure (1) et la vitre intérieure (2), l'élément hologramme (4) étant disposé entre la vitre extérieure (1) et la première couche intermédiaire (3) ou entre la vitre intérieure (2) et la première couche intermédiaire, et un revêtement antireflet (6) étant disposé sur la surface côté intérieur (IV) de la vitre intérieure (2).
PCT/EP2023/051552 2022-01-26 2023-01-23 Vitre composite dotée d'un élément hologramme et d'un revêtement antireflet WO2023144085A1 (fr)

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Cited By (1)

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WO2023247264A1 (fr) * 2022-06-21 2023-12-28 Saint-Gobain Glass France Vitre composite dotée d'un élément hologramme et d'une couche à forte réfraction optique

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CN117423715B (zh) * 2023-12-19 2024-04-12 华天科技（昆山）电子有限公司 一种晶圆级光学芯片封装结构的制备方法及封装结构

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WO2021254873A1 (fr) 2020-06-15 2021-12-23 Saint-Gobain Glass France Panneau composite avec un élément holographique et procédé pour sa production
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JP2000233665A (ja) * 1999-02-17 2000-08-29 Asahi Glass Co Ltd 車両用投影型ホログラフィック情報表示装置
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WO2021254873A1 (fr) 2020-06-15 2021-12-23 Saint-Gobain Glass France Panneau composite avec un élément holographique et procédé pour sa production
WO2021254872A1 (fr) 2020-06-15 2021-12-23 Saint-Gobain Glass France Verre feuilleté doté d'un élément holographique et procédé de fabrication
EP3998501A2 (fr) 2020-10-27 2022-05-18 Luminit Llc Élimination de reflet dans des affichages tête-haute

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WO2023247264A1 (fr) * 2022-06-21 2023-12-28 Saint-Gobain Glass France Vitre composite dotée d'un élément hologramme et d'une couche à forte réfraction optique

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