Glass element for transmitting infrared light rays and method for producing the glass element

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a glazed element, for example a windshield or a side window of a vehicle. In particular, the present invention relates to a glazed element suitable for transmitting infrared light rays. STATE OF THE ART

[0002] In a vehicle, it is known to use a thermal camera, adapted to image infrared radiation. The image thus obtained can be used by a driver assistance system. Indeed, the thermal camera can allow a vehicle driver to distinguish obstacles to the driving of the vehicle in foggy conditions, or for example low light. The thermal camera can be connected to a driver assistance system, so as to automatically detect obstacles that are not visible to the driver of the vehicle.

[0003] However, the integration of a thermal camera inside the vehicle may be prevented by the absorption of infrared light rays by the vehicle's glazing. Indeed, the transmission rate of a light ray through a windshield is typically less than 50% for a wavelength of the light ray greater than 800 nanometers.

[0004] To this end, document WO 2021 / 043838 describes a glazed element in which a windshield glazing comprises an opening. An insert formed by a material transparent to infrared light rays is arranged in the opening. Thus, the infrared light rays can pass through the windshield through the insert, so as to be detected by a thermal camera arranged inside the vehicle. In order to ensure a seal of the windshield through the opening, a ring of flexible material is arranged between the insert and the windshield glazing so as to form a seal. The ring is bonded to a wall formed by the opening.

[0005] However, the flush fit of the insert and the glazing is not ensured by such a glazed element. Indeed, during the manufacture of the glazed element, precise alignment of the insert and the glazing along the same external surface is difficult to implement. In addition, an adhesive used when fixing the ring to the windshield glazing may overflow onto an external face of the glazing, and thus deteriorate the flush fit of the glazed element.

[0006] US 2007 / 216768 A1 discloses a system comprising a windshield provided with a first glazing extending along a first surface, said glazing comprising a notch, which defines an inner wall extending along a thickness of the first glazing. A system for transmitting infrared light rays fixedly mounted to the first glazing is constituted by a second glazing, which is transparent to infrared light rays and embedded in direct contact with the first glazing, and an insert which comprises a side wall covering the inner wall and extending from the second face of the glazing towards its first face. STATEMENT OF THE INVENTION

[0007] An aim of the invention is to propose a solution to facilitate and improve alignment between a vehicle glazing and an insert suitable for transmitting infrared light rays in such glazing, while improving the flushness of the glazing and the insert with respect to the state of the art. This aim is at least partially achieved within the framework of the present invention thanks to a glazed element, comprising: a first glazing extending along a first surface, the first glazing having a first main face and a second main face, opposite the first face with respect to the first glazing, the first glazing comprising an opening, the opening defining an inner wall of the first glazing, extending along a thickness of the first glazing and defining a passage between the first face and the second face, the first glazing having a first coefficient a1 light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm, an infrared light ray transmission system mounted fixed to the first glazing, the infrared ray transmission system comprising a support and a second glazing, the second glazing having a second coefficient a 2 of light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm, the second coefficient a 2 being strictly less than the first coefficient a 1 , the support comprising a side wall at least partially covering the inner wall and extending from the second face towards the first face, preferably in a first direction perpendicular to the first surface, the support comprising a collar mounted fixed to the side wall and extending on the second face, preferably in a plane parallel to the first surface, the second glazing extending along the first surface and being embedded in the support, and surrounded by the side wall so that the support and the second glazing are directly in contact, the side wall being inserted into the opening so that the opening entirely surrounds the side wall, the collar being mounted fixed on the second face so as to seal the first face from the second face.

[0008] The present invention is advantageously supplemented by the following characteristics, taken individually or in any of their technically possible combinations: the glazed element comprises an adhesive layer, the adhesive layer being in contact with the second face and with a face of the collar arranged opposite the second face, the adhesive layer entirely surrounding the side wall, the side wall extends in the first direction, from the collar to, at most, a top of the support, a distance between the second face and the top of the support in the first direction being less than or equal to the thickness e of the first glazing, and preferably strictly less than the thickness e of the first glazing, the second glazing is overmolded by the support, the support and the second glazing have elements with complementary shapes configured to block a movement of the second glazing relative to the support in a direction normal to the first surface, the support has an inner face, preferably formed by the side wall and / or by the collar,the inner face being arranged opposite the second glazing, the inner face comprising a notch forming a housing, the second glazing being mounted in the housing formed by the notch, the second glazing has a base and a face opposite the base relative to the second glazing, an area of ​​the base being strictly greater than an area of ​​the face, the second glazing preferably having a truncated cone shape defined between the base and the face, the support has an inner face, preferably formed by the side wall and / or by the collar, the inner face being arranged opposite the second glazing, the inner face comprising a notch forming a housing, the second glazing being mounted in the housing formed by the notch, and the base of the second glazing being mounted in the housing, the second glazing has a coefficient, a 2 absorption of a light ray less than 0.5 cm -1< , the light ray having at least one wavelength chosen between 800 nm and 15 µm, the second glazing comprises zinc sulfide and / or zinc selenide, the side wall and the collar form a monolithic element, the glazed element comprises at least one element chosen from an infrared camera, preferably thermal, and a light source configured to emit infrared light rays, the element(s) being arranged opposite the second glazing on the side of the second face relative to the first glazing, the glazed element comprises a housing, the housing being fixedly mounted to the first glazing, at least one element chosen from an infrared camera, preferably thermal, and a light source configured to emit infrared light rays, the element being mounted to the housing opposite the second glazing,the second glazing has a shape chosen from an elongated shape and a bent shape, preferably a “” shape, L ".

[0009] Another aspect of the invention is a method of manufacturing a glazed element according to an embodiment of the invention, the method comprising the steps of: (a) arranging the second glazing in an injection mold, the second glazing being arranged between a plurality of centering elements, the centering elements being arranged in the injection mold and being configured to position the second glazing at a predetermined position in the injection mold, (b) injecting a polymer material into the injection mold so as to form the support, preferably by overmolding the second glazing, (c) inserting the infrared light ray transmission system formed by the second glazing and by the support during step (b) into the opening of the first glazing.

[0010] Advantageously, the method comprises a step prior to step (c) of inserting the system, during which a plate is mounted on the first face so as to cover the opening.

[0011] Another aspect of the invention is a second glazing having a coefficient a 2 absorption of a light ray less than 0.5 cm -1< , the light ray having at least one wavelength chosen between 800 nm and 15 µm, the second glazing having a shape chosen from an elongated shape and a bent shape, preferably a shape in " L ". DESCRIPTION OF FIGURES

[0012] Other characteristics, aims and advantages of the invention will emerge from the following description, which is purely illustrative and non-limiting, and which must be read in conjunction with the appended drawings in which: [ Fig. 1 ] - there Figure 1illustrates a section of a glazed element according to an embodiment of the invention, [ Fig. 2 ] - there Figure 2 illustrates a section of a glazed element according to an embodiment of the invention, [ Fig. 3 ] - there Figure 3 illustrates a section of a glazed element according to an embodiment of the invention, [ Fig. 4 ] - there Figure 4 illustrates a detail of a section of a glazed element according to an embodiment of the invention, [ Fig. 5 ] - there Figure 5 illustrates an overall view of a glazed element according to an embodiment of the invention, [ Fig. 6 ] - there Figure 6 illustrates an overall view of a glazed element according to an embodiment of the invention, [ Fig. 7 ] - there Figure 7 illustrates a system for transmitting infrared light rays according to an embodiment of the invention having a shape of revolution, [ Fig. 8 ] - there figure 8illustrates a system for transmitting infrared light rays according to an embodiment of the invention having a star shape, [ Fig. 9 ] - there Figure 9 illustrates a system for transmitting infrared light rays according to an embodiment of the invention having an angled shape, [ Fig. 10 ] - there Figure 10 illustrates a method of manufacturing a glazed element according to an embodiment of the invention, [ Fig. 11 ] - there Figure 11 illustrates a detail of a section of a glazed element according to an embodiment of the invention, [ Fig. 12 ] - there Figure 12 illustrates a detail of a section of a glazed element according to an embodiment of the invention, in which the support has a flare, [ Fig. 13 ] - there figure 13 illustrates a detail of a section of a glazed element according to an embodiment of the invention, in which elements with complementary shape are formed by a series of grooves, [ Fig. 14] - there Figure 14 illustrates a detail of a support of a glazed element according to an embodiment of the invention, [ Fig. 15 ] - there Figure 15 illustrates a detail of a section of a glazed element according to an embodiment of the invention, [ Fig. 16 ] - there figure 16 illustrates a shape of the second glazing reported in a plane parallel to a thickness of the first glazing, [ Fig. 17 ] - there Figure 17 illustrates a glazed element comprising a wiper device and an arrangement of the second glazing allowing one face of the second glazing to be wiped by the wiper device.

[0013] Throughout the figures, similar elements have identical references. DEFINITIONS

[0014] By "we mean glazing » a structure comprising at least one sheet of organic or mineral glass, preferably adapted to be mounted in a vehicle, for example a motor or railway vehicle.

[0015] The glazing may comprise a single sheet of glass or a multi-layered glass assembly of which at least one layer is a sheet of glass.

[0016] A glazing unit may comprise a sheet of organic glass. Preferably, the organic glass is formed by a compound comprising acrylates, preferably polymethyl methacrylate (PMMA). It may also be formed from polycarbonate.

[0017] A glazing unit may comprise a glass unit. The glass unit comprises at least one sheet of glass. The glass may be organic or mineral glass. The glass may be tempered. The glass unit is preferably a laminated glazing unit. The term " laminated glazing» a glazed assembly comprising at least two sheets of glass and an interlayer film formed of plastic, preferably viscoelastic, separating the two sheets of glass. The plastic interlayer film may comprise one or more layers of a viscoelastic polymer such as poly(vinyl butyral) (PVB) or an ethylene-vinyl acetate copolymer (EVA). The interlayer film is preferably made of standard PVB or acoustic PVB (such as single-layer or three-layer acoustic PVB). The acoustic PVB may comprise three layers: two outer layers of standard PVB and an inner layer of PVB with added plasticizer so as to make it less rigid than the outer layers. DETAILED DESCRIPTION OF THE INVENTION General architecture of the glazed element 1

[0018] In reference to the Figure 1 , to the Figure 2 and to the Figure 3, a glazed element 1 according to an embodiment of the invention comprises a first glazing 2 extending along a first surface 3. The first glazing 2 may be a vehicle windshield, a vehicle side glazing, a skylight, a vehicle rear window, for example a heated rear window.

[0019] The first glazing 2 has a first face F1, intended to be exposed to the exterior of the vehicle. The first glazing 2 has a second face F4, opposite the first face F1 relative to the first glazing 2, and preferably parallel to the first face F1. The second face F4 is intended to be exposed in the passenger compartment of the vehicle, i.e. inside the vehicle.

[0020] The first glazing 2 has a first coefficient a 1 of light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm, in the infrared radiation range. Preferably, the first coefficient a 1 is strictly greater than 0.5 cm -1< , in particular strictly greater than 1 cm -1< . Indeed, the first glazing 2 typically has high absorption of infrared rays so as to prevent the sun's radiation from heating the passenger compartment of the vehicle to temperatures that hinder the user's comfort.

[0021] The first glazing 2 comprises an opening 5. The opening 5 defines an inner wall 11 of the first glazing 2, the inner wall 11 extending along a thickness e of the first glazing 2. The opening 5 is preferably a through opening, connecting the first face F1 to the second face F4.

[0022] The glazed element 1 comprises a system 4 for transmitting infrared light rays. The system 4 is fixedly mounted on the first glazing 2. The system 4 for transmitting infrared rays comprises a support 6 and a second glazing 7.

[0023] The second glazing 7 has a second coefficient a 2 of light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm. The second coefficient a 2 is strictly less than the first coefficient a 1 . Thus, the transmission of an infrared light ray is higher through the second glazing 7 compared to a transmission of the same light ray through the first glazing 2.

[0024] The support 6 comprises a side wall 8. The side wall 8 at least partially covers the inner wall 11, and preferably completely covers the inner wall 11. The side wall 8 extends mainly from the second face F4 towards the first face F1, in particular up to the first face F1, and preferably in a first direction 9, perpendicular to the first surface 3.

[0025] The support 6 comprises a collar 10 mounted fixed to the side wall 8. The collar 10 extends over the second face F4 and preferably along a plane parallel to the first surface 3.

[0026] The second glazing 7 may extend along the first surface 3. The second glazing 7 is embedded in the support 6, while being surrounded by the side wall 8. Thus, the second glazing 7 is mechanically fixedly mounted to the support 6. The support 6 and the second glazing 7 are in direct contact. The mounting between the support 6 and the second glazing 7 may be without an adhesive layer.

[0027] The side wall 8 is inserted into the opening 5 so that the inner wall 11 surrounds the side wall 8, and preferably completely surrounds the side wall 8.

[0028] The collar 10 is fixedly mounted on the second face F4 so as to seal the first face F1 from the second face F4. Due to the presence of the collar 10 and the mounting of the support 6 to the first glazing 2 by the collar 10, it is possible both to not use adhesive between the first glazing 2 and the side wall 8, and between the side wall 8 and the second glazing 7, so as to avoid any overflow of an adhesive onto the first surface F1 and thus keep an outer face of the glazed element 1 flush, while sealing the first face F1 from the second face F4 with regard to water or dust. Fixed mounting of collar 10 to the second face F4

[0029] The glazed element 1 may comprise an adhesive layer 13. The adhesive layer 13 is in contact with the second face F4 and with a face of the collar arranged opposite the second face F4. The adhesive layer 13 is arranged between the second face F4 and between the face of the collar 10 which is opposite the second face F4. The adhesive layer 13 may entirely surround the side wall 8, so as to form a sealed seal between the second face F4 and the collar 10.

[0030] The adhesive layer 13 may be formed by an adhesive. The adhesive may be a polyurethane (PU) adhesive. Preferably, the adhesive forming the adhesive layer 13 has a Shore A hardness. The adhesive layer 13 may also be formed by a double-sided adhesive tape. Thus, the connection between the first face F1 and the collar 10 may be a removable connection, allowing the system 4 to be replaced during use of the glazed element 1, for example when the second glazing 7 is damaged. Support 6

[0031] The support 6 comprises the side wall 8 and the collar 10. The side wall 8 extends in the first direction 9, from the collar 10 to, at most, a vertex 14 of the support 6. A distance between the second face F4 and the vertex 14 of the support 6 in the first direction 9 is less than or equal to the thickness e of the first glazing 2. With reference to the Figure 2, the distance between the second face F4 and the top 14 of the support 6 in the first direction is strictly less than the thickness e of the first glazing 2. Thus, it is possible to control the flushness of the glazed assembly 1 so that it is impossible for the support 6 to protrude from the first face F1. Preferably, the distance between the first face F1 and the top 14 of the support 6 in the first direction is between 0 mm and 0.05 mm excluded. The second glazing 7 may have a base 18 and a face 19 opposite the base relative to the second glazing 7, preferably locally parallel to the base 18. Preferably, the face 19 opposite the base is arranged, relative to the first direction 9, between the second face F4 included and between the first face F1.

[0032] The side wall 8 and the collar 10 can form a monolithic element, preferably formed by injecting a material of the support 6 into a mold.

[0033] The support 6 may be formed from a thermoplastic material or a metallic material. The material of the support 6 may be, for example, polyurethane or aluminum. Preferably, the support material 6 has a coefficient of thermal expansion of between 0.8 times the coefficient of thermal expansion of the glass and between 1.2 times the coefficient of thermal expansion of the glass. Thus, it is possible to avoid using a piece of elastic material between the first glazing 2 and the support 6, and / or between the support 6 and the second glazing 7 to compensate for the differences in thermal expansion of the different elements of the glazed element 1. The material of the support 6 preferably comprises glass fibers. Thus, it is possible to minimize the difference between the coefficient of thermal expansion of the material of the support 6 and between the coefficient of thermal expansion of the material of the first glazing 2 and / or of the second glazing 7.The material of the support 6 may also comprise glass beads. The glass beads also make it possible to minimize the difference between the coefficient of thermal expansion of the material of the support 6 and between the coefficient of thermal expansion of the material of the first glazing and / or the second glazing 7. Second glazing 7

[0034] The second glazing 7 may have a coefficient a 2 light absorption less than 0.5 cm -1< for a light ray having at least one wavelength chosen between 800 nm and 15 µm, and preferably less than 0.1 cm -1< . The wavelength may in particular be chosen between 8 µm and 12 µm and preferably chosen between 9.5 µm and 10.5 µm. Thus, the second glazing 7 specifically allows the transmission of light rays from a thermal camera. The second glazing 7 may be formed by a material comprising zinc sulfide (ZnS), zinc selenide (ZnSe) and / or barium fluoride. Thus, it is possible to maximize the transmission of infrared light rays through the second glazing 7 so as to thermally image elements external to the vehicle.

[0035] Preferably, the second glazing 7 is an insert. The insert may be formed by a monolithic material having a coefficient a 2 light absorption less than 0.5 cm -1< for a light ray having at least one wavelength chosen between 800 nm and 15 µm, and preferably less than 0.1 cm -1<.

[0036] The material of the second glazing 7 may comprise: a compound comprising a multispectral zinc sulfide, in particular obtained after hot isostatic pressing, in particular comprising selenium, such as ZnS x Se 1-x where x is greater than or equal to 0.97 inclusive and less than 1 inclusive, in particular multispectral ZnS, and / or a compound comprising a zinc selenide, in particular ZnSe, in particular including sulfur, such as ZnSe y S 1-y where y is preferably greater than or equal to 0.97 inclusive and less than 1 inclusive, and / or a compound comprising a barium fluoride, in particular comprising calcium and / or strontium, in particular Ba 1-ij Ca i Sr j F 2 where i+j are strictly less than 1, and i and j are preferably each greater than 0.25 inclusive, or Ba 1-i Ca i F 2 where i is strictly less than 1 and preferably greater than 0.25 inclusive, in particular BaF 2 .

[0037] The second glazing 7 may be transparent to a light ray having a wavelength between 800 nm and 15 µm, i.e. in the spectrum of infrared light rays. In particular, the second glazing 7 may have a light transmission of at least 50%, and in particular at least 70%, for a light ray having a wavelength between 800 nm and 15 µm.

[0038] The second glazing 7 may be transparent to a light ray having a wavelength between 400 nm and 800 µm, i.e. in the visible spectrum. In particular, the second glazing 7 may have a light transmission of at least 50%, and in particular at least 70%, for a light ray having a wavelength between 400 nm and 800 µm.

[0039] Preferably, the second glazing 7 is formed by a material having a modulus of rupture greater than 20 MPa. The material forming the second glazing 7 may be polycrystalline, and may be obtained by chemical vapor deposition and / or by hot isostatic pressing.

[0040] Alternatively, the material forming the second glazing 7 may be an organic material and comprise a crosslinked organosulfur hybrid polymer, comprising linear sulfur chains crosslinked by organic comonomers. Preferably, the organic comonomers may be chosen from the group consisting of 1,3-diisopropenylbenzene (DIB), 1,3,5-triisopropenylbenzene (TIB), di-iodobenzene, norbornadiene (NBD), norbornadiene dimer (NBD2), and tetravinyltin (TVSn). The organosulfur hybrid polymer may have from 0.5 to 5% by mass of another element belonging to the group of chalcogens, preferably selenium (Se). A glass transition temperature of the organic material may be greater than 50°C inclusive, and preferably in a range between 60°C and 180°C inclusive, and preferably between 80°C and 160°C inclusive.

[0041] The second glazing 7 preferably has a shape chosen from an elongated shape and a bent shape, preferably a “ L ", the shape of the second glazing being preferentially related to the first surface 3. Thus, it is possible to arrange several optical elements opposite the second glazing 7 while minimizing its size. System 4 for transmitting infrared light rays

[0042] In reference to the Figure 1 , to the Figure 2 , and to the Figure 3 , the second glazing 7 can be embedded in the support by overmolding the second glazing 7 by the support 6. The second glazing 7 is thus overmolded by the support 6. Thus, it is possible to avoid using an adhesive to mount the second glazing 7 to the support 6.

[0043] In reference to the Figure 3 and to the Figure 4, the support 6 and the second glazing 7 may have form-fitting elements configured to block movement of the second glazing 6 relative to the support in a direction normal to the first surface 3. The form-fitting elements may be a pair of elements formed by a notch and a boss. The notch may be formed in the support 6 and the boss may be formed on the second glazing 7, or the notch may be formed in the second glazing 7 and the boss may be formed on the support 6. The support 6 may have an inner face 16. The inner face 16 may be formed by the side wall 8 and / or by the collar 10. The inner face 16 of the support 6 is arranged opposite the second glazing 7, and may comprise a notch 15 forming a housing. The second glazing 7 may be mounted in the housing formed by the notch 15.Thus, it is possible to prevent the movement of the second glazing 7 in a direction which follows the first direction 9, without using adhesive between the second glazing 7 and the support 6. Preferably, the notch 15 is arranged on the side of the second face F4 relative to the first glazing 2.

[0044] In reference to the Figure 3 and to the Figure 4, the second glazing 7 may have a base 18 and a face 19 opposite the base relative to the second glazing 7, preferably locally parallel to the base 18, an area of ​​the base 18 being strictly greater than an area of ​​the face 19. Thus, due to an asymmetry of the second glazing 7 relative to the first surface 3, the movement of the second glazing 7 is not permitted in a direction normal to the first surface 3. Preferably, the second glazing 7 has a frustoconical shape defined between a base of the second glazing 7 and a face of the second glazing 7 parallel to the base of the second glazing 7. Thus, due to the contact between the side wall 8 and a frustoconical wall of the second glazing 7, it is possible to prevent movement of the second glazing 7 in a direction which follows the first direction 9, oriented from the base of the second glazing 7 towards the face of the second glazing 7 parallel to the base. figure 16, the second glazing 7 may have a shape which, reported in a plane parallel to the first direction 9, does not have an angle strictly less than 90°. Thus, the edges of the second glazing 7 are mechanically reinforced. In particular, the shape may comprise a cylindrical end, i.e. one whose generatrices are parallel, so that the shape reported in a plane parallel to the first direction 9 has a base forming angles α equal to 90°. The remainder of the shape, i.e. the part extending from the cylindrical end towards the face 19, may be frustoconical. The thickness d 4 of the cylindrical end relative to the first direction 9 may be greater than 0.2 mm, in particular 0.6 mm, and preferably 1 mm.

[0045] Preferably, the base of the second glazing 7 is mounted in the housing. Thus, it is possible to prevent movement of the second glazing 7 in the first direction 9, without using adhesive between the second glazing 7 and the support 6.

[0046] In reference to the Figure 5 and to the Figure 6 , the system 4 is preferably arranged on the periphery of the first glazing 2. The system 4 can be arranged near the location of the first glazing 2 on which a rearview mirror of the vehicle is mounted. Driving assistance system

[0047] The glazed element 1 may comprise at least one infrared camera, preferably thermal. The camera is arranged opposite the second glazing 7 on the side of the second face F4 relative to the first glazing 2. The glazed element 1 may also comprise a LIDAR (English acronym for " laser imaging detection and ranging"). The LIDAR may comprise an infrared camera and a light source configured to emit an infrared light ray, detectable by the infrared camera. The infrared camera is then arranged opposite the second glazing 7 on the side of the second face F4 relative to the first glazing 2, and the light source is also arranged opposite the second glazing 7 on the side of the second face F4 relative to the first glazing 2. Thus, it is possible to use the same system 4 for the transmission of infrared light rays from and / or to several optical elements arranged opposite the second glazing 7, which makes it possible to simplify the manufacture of a driving assistance system.

[0048] The glazed element 1 may comprise a housing. The housing may be fixedly mounted to the first glazing 2. At least one infrared camera, preferably thermal, may be mounted to the housing opposite the second glazing 7. A LIDAR may also be mounted to the housing. The glazed element 1 may comprise a part comprising the support 6 and the housing, the support 6 being fixedly mounted to the housing. Thus, the housing may be fixedly mounted to the first glazing 2 via the collar 10 of the support 6. The part may be monolithic and form both the support 6 and the housing.

[0049] In reference to the Figure 7 , to the figure 8 , and to the Figure 9 , the shape of the support 6 and the shape of the second glazing 7 can be chosen so as to allow an arrangement of different elements emitting or receiving infrared light rays opposite the second glazing 7. In particular, with reference to the Figure 9, the system 4 and / or the second glazing 7 may have an elongated shape or a bent or “L” shape for these purposes.

[0050] The collar 10 comprises an external face 21, opposite the face of the collar arranged opposite the second face F4 relative to the collar. With reference to the Figure 12 , the support 6 may have a flare 20 forming a wall between the inner face 16 and the outer face 21. The Figure 11 illustrates a glazing 2 without flare 20 and the Figure 12 illustrates a glazing 2 comprising a flare 20. The term “ flare» that an area of ​​a surface defined by the inner face 16 relative to the first surface 3 is strictly less than an area of ​​a surface defined by the flare 20 relative to the first surface 3. Thus, light rays passing through the second glazing 7 in the vicinity of the inner face 16 can be imaged by a camera arranged inside a passenger compartment without encountering an edge formed between the inner face 16 and the outer face 21. The camera can thus image an object with a higher field of view FOV than in the absence of the flare 20, thereby avoiding vignetting when imaging the object.

[0051] The flare 20 may also have an asymmetry of rotation around the first direction 9. Thus, it is not necessary to orient the support 6 during the manufacture of the glazed element 1, in particular when it is mounted fixed to the first glazing 2.

[0052] The flare 20 may be a bevel implemented on an edge formed by the inner face 16 of the side wall and / or by the outer face 21. The flare 20 may be a chamfer formed between the inner face 16 and the outer face 21.

[0053] In reference to the figure 13, the shape-matching elements may be formed by a series of grooves 22 formed on the inner face 16 and by a series of grooves 22 formed on the second glazing 7, the grooves formed on the inner face 16 having a shape match with the grooves 22 formed on the second glazing 7. Each groove 22 may form a closed line along the inner face 16. The grooves 22 may be parallel to each other. Preferably, the shape-matching elements comprise at least two grooves 22, preferably at least three grooves 22, preferably at least four grooves 22. Thus, at least a portion of the inner face 16 makes it possible to avoid parasitic reflection of light rays. With reference to the Figure 14, a section of the grooves 22 in a plane perpendicular to the first surface 3 forms saw teeth. Thus, it is possible to avoid reflection of light rays on the inner face 16 within a predetermined range of angles.

[0054] The second glazing 7 of the glazed element 1 has an apparent diameter φ. The apparent diameter φ is determined by the geometry of the second glazing 7. The apparent diameter φ can also be determined by the geometry of the elements with complementary shape. With reference to the Figure 14 , the elements with complementary shape can have a thickness d 2 along an axis defined by a diameter of the second glazing 7. This thickness d 2 may be less than one tenth of the diameter of the second glazing 7, and preferably less than one twentieth of the diameter of the second glazing 7. The thickness d 2 may be less than 1 mm. Thus, it is possible to mechanically hold the second glazing 7 in the support 6 in the absence of adhesive while maximizing the apparent diameter φ of the second glazing 7.

[0055] In reference to the Figure 15 , the second glazing 7 can extend in the first direction 9 from the side wall 8 towards the collar 10, extending beyond the external face 21 of the collar 10 by an extension distance d 3 . A portion of the second glazing 7 is then arranged on a side opposite the side wall 8 relative to the collar 10. Thus, it is possible to reduce and / or eliminate the vignetting effect when imaging the object, by widening the field of view with regard to a glazed element in which the second glazing 7 would not exceed the external face 21 of the collar 10. In addition, with reference to the Figure 15, the protrusion of the second glazing 7 from the external face 21 makes it possible to avoid steric problems when arranging the camera 23 opposite the second glazing 7. Manufacture of glazed element 1 and system 4

[0056] In reference to the Figure 10 , another aspect of the invention is a method of manufacturing a glazed element 1.

[0057] The method comprises a step 101 of arranging the second glazing 7 in an injection mold, the second glazing 7 being arranged between a plurality of centering elements, the centering elements being arranged in the injection mold and being configured to position the second glazing 7 at a predetermined position in the injection mold. Thus, it is possible to precisely center the second glazing 7 in the support 6. Preferably, the second glazing 7 is also fixedly mounted between two pins which make it possible to maintain the second glazing 7 at a predetermined height in the injection mold.

[0058] The method comprises a step 102 of injecting a polymer material into the injection mold so as to form the support 6, preferably by overmolding the second glazing 2.

[0059] Preferably, the method comprises a step 103 during which a plate is mounted on the first face F1 so as to cover the opening. Thus, during the subsequent insertion of the support 6 into the opening 5, the top of the support 6 and the first face F1 of the first glazing 2 are flush. Indeed, it is not possible, thanks to the plate, for the top of the support 6 to exceed the first face F1. Preferably, the plate comprises a seal, preferably two seals. The seal(s) are each arranged in contact with the first glazing 2 and in contact with the second glazing 7 so as to close any passage between the second face F4 and the first face F1. The overmolding implemented on its joints makes it possible to form a depression formed by the support 6 arranged between the first glazing 2 and the second glazing 7.

[0060] The method comprises a step 104 of inserting the system 4 formed by the second glazing 7 and by the support 6 during step 102 into the opening 5 of the first glazing 2. 24 wiper device

[0061] In reference to the Figure 17, the glazed element 1 may comprise a windshield wiper device 24. The windshield wiper device 24 comprises at least one wiping blade 25 arranged in contact with the first face F1 of the first glazing. The windshield wiper device 24 is configured to control a movement of the wiping blade 25 so that the contact between the wiping blade 25 and the first face F1 defines a surface capable of being wiped 26 in the first face F1. The second glazing 7 may have a base 18 and a face 19 opposite the base relative to the second glazing 7, preferably locally parallel to the base 18. The second glazing 7 may be arranged so that the face 19 is included in the surface capable of being wiped 26. Thus, it is possible to clean both the first glazing 2 and the second glazing 7 when using the windshield wiper device 24.

Claims

1. A glazed element (1), comprising: - a first glazing (2) extending along a first surface (3), the first glazing having a first main face (F1) and a second main face (F4), opposite the first face (F1) with respect to the first glazing (2), the first glazing (2) comprising an opening (5), the opening defining an inner wall (11) of the first glazing (2), extending along a thickness of the first glazing (2) and defining a passage between the first face (F1) and the second face (F4), the first glazing (2) having a first coefficient a1 of light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm, - an infrared light transmission system (4) mounted fixedly to the first glazing (2), the glazed element (1) being characterized in that: - the infrared light transmission system (4) comprises a support (6) and a second glazing (7), the second glazing (7) having a second coefficient a2 of light absorption for a light ray having at least one wavelength chosen between 800 nm and 15 µm, the second coefficient a2 being strictly lower than the first coefficient a1, the support (6) comprising a side wall (8) at least partially covering the inner wall (11) and extending from the second face (F4) towards the first face (F1), the support (6) comprising a flange (10) mounted fixedly to the side wall (8) and extending over the second face (F4), the second glazing (7) extending along the first surface (3) and being embedded in the support (6), and surrounded by the side wall (8) so that the support (6) and the second glazing (7) are in direct contact, the side wall (8) being inserted into the opening (5) so that the opening (5) completely surrounds the side wall (8), the flange (10) being fixedly mounted on the second face (F4) so as to seal off the first face (F1) from the second face (F4).

2. A glazed element (1) according to claim 1, comprising an adhesive layer (13), the adhesive layer (13) being in contact with the second face (F4) and with a face of the flange (10) arranged opposite the second face (F4), the adhesive layer (13) completely surrounding the side wall (8).

3. The glazed element (1) according to claim 1 or 2, wherein the side wall (8) extends in the first direction (9) from the flange (10) to, at the furthest, one vertex (14) of the support (6), a distance between the second face (F4) and the vertex (14) of the support (6) in the first direction being strictly less than the thickness e of the first glazing (2).

4. The glazed element (1) according to one of claims 1 to 3, wherein the second glazing (7) is overmolded by the support (6).

5. The glazed element (1) according to one of claims 1 to 4, wherein the support (6) and the second glazing (7) have form-fitting elements configured to block movement of the second glazing (6) relative to the support in a direction normal to the first surface (3).

6. The glazed element (1) according to one of claims 1 to 5, wherein the support (6) has an internal face, the internal face being arranged opposite the second glazing (7), the internal face comprising a notch (15) forming a recess, the second glazing (7) being mounted in the recess formed by the notch (15).

7. The glazed element (1) according to one of claims 1 to 6, wherein the second glazing (7) has a base (18) and a face (19) opposite the base (18) with respect to the second glazing (7), an area of the base (8) being strictly greater than an area of the face (19), the second glazing (7) preferentially having a frustoconical shape defined between the base (18) and the face (19).

8. The glazed element (1) according to claim 7, wherein the support (6) has an internal face, the internal face being arranged opposite the second glazing (7), the internal face comprising a notch (15) forming a recess, the second glazing (7) being mounted in the recess formed by the notch (15), and wherein the base of the second glazing (7) is mounted in the recess.

9. The glazed element (1) according to one of claims 1 to 8, wherein the second glazing (2) has a coefficient a2 of absorption of a light ray of less than 0.5 cm -1, the light ray having at least one wavelength selected between 800 nm and 15 µm, the second glazing (2) preferentially comprising a member selected from zinc sulfide, zinc selenide and a cross-linked hybrid organo-sulfur polymer, comprising linear sulfur chains cross-linked by organic comonomers.

10. The glazed element (1) according to one of claims 1 to 9, wherein the side wall (8) and the flange (10) form a monolithic element.

11. The glazed element (1) according to one of claims 1 to 10, comprising at least one infrared camera, preferentially thermal, the infrared camera being arranged opposite the second glazing (7) on the side of the second face (F4) with respect to the first glazing (2).

12. The glazed element (1) according to claim 11, comprising a housing, the housing being fixedly mounted to the first glazing (2), and at least one infrared camera, preferentially thermal, the infrared camera being mounted to the housing facing the second glazing (7).

13. The glazed element (1) according to one of claims 1 to 12, wherein the second glazing (7) has a shape, added to the first surface (3), selected from an elongated shape and an elbow shape, preferentially an "L" shape.

14. A method for manufacturing a glazed element (1) according to one of claims 1 to 13, the method comprising the steps of: (a) arranging the second glazing (7) in an injection mold, the second glazing (7) being arranged between a plurality of centering elements, the centering elements being arranged in the injection mold and being configured to position the second glazing (7) at a predetermined position in the injection mold, (b) injection of a polymeric material into the injection mold so as to form the support (6), by overmolding the second glazing (2), (c) inserting the infrared light transmission system (4) formed by the second glazing (7) and the support (6) in step (b) into the opening (5) in the first glazing (2).

15. The method for manufacturing a glazed element (1) according to claim 14, comprising a step prior to step (c) of inserting the system (4), during which a plate is mounted on the first face (F1) so as to cover the opening.