Vehicle window, information acquisition system, and vehicle

Abstract

The application provides a vehicle window glass, an information collection system and a vehicle. The vehicle window glass has an information collection area, the information collection area is provided with a nano anti-reflection layer, and incident light passes through the information collection area and the nano anti-reflection layer to form first refracted light and second refracted light; the nano anti-reflection layer comprises a plurality of nano cones, and the plurality of nano cones are periodically arranged; when the incident angle θ of the incident light is 45°-75°, the ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is a main-sub image transmittance ratio Cr12, and Cr12 is greater than or equal to 1000. The application can enable an information collection device to obtain a more accurate and clear image.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle accessories, in particular to a vehicle window glass, an information collection system and a vehicle. BACKGROUND

[0002] The intelligentization and networking of automobiles are the main direction of future development, and automatic driving has also become the main direction of automobile development. In general, information collection devices such as visible light cameras, millimeter wave radars, laser radars and ultrasonic radars are carried on the position close to the top of the front windshield glass in the automobile, which will shoot and process the driving environment outside the automobile into image data to assist in realizing automatic driving. For the visible light camera, the light outside the automobile must pass through the front windshield glass to be received by it. Since the front windshield glass is a laminated glass composed of an outer glass plate, an intermediate layer and an inner glass plate, and the front windshield glass is installed on the automobile in an inclined state, the light from outside will be reflected and refracted multiple times when entering and exiting the front windshield glass, thereby forming one or several secondary images with a certain distance from the main image near the main image. The secondary image that can be recognized by the information collection device is defined as a sub-image. The sub-image deviation refers to the angular deviation between the sub-image and the main image, and the sub-image deviation will affect the accurate recognition of the image and is not conducive to obtaining accurate driving information.

[0003] Patent CN109414911B discloses a vehicle window assembly with variable thickness distribution associated with a forward looking camera, which utilizes a wedge-shaped thickness distribution formed within a first portion of the interlayer in a direction toward the upper edge to attenuate the interference of the sub-image deviation on the camera. This special specification of the interlayer (such as PVB) is sensitive to the optical design of the vehicle model, and the front windshield glass of different vehicle models needs to be redesigned.

[0004] Patent WO2016143582A1 discloses a windshield, which utilizes a correction member added to the shooting window of the camera to attenuate the interference of the sub-image deviation on the camera. The correction member is fixed on the inner surface of the windshield by an adhesive or embedded in the through hole of the windshield. SUMMARY

[0005] The purpose of the present application is to provide a vehicle window glass, an information collection system and a vehicle, which can enable the information collection device to obtain more accurate and clear images.

[0006] The first aspect of the present application provides a vehicle window glass applied to a vehicle, the vehicle window glass having an information collection area, the information collection area being provided with a nano anti-reflection layer, incident light passing through the information collection area and the nano anti-reflection layer to form first refracted light and second refracted light;

[0007] The nano anti-reflection layer comprises a plurality of nano cones, and the plurality of nano cones are periodically arranged.

[0008] The ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is a main and auxiliary image transmittance Cr12, and Cr12≥1000 when the incident angle θ of the incident light is 45°-75°.

[0009] It can be understood that, by adding the nano-anti-reflection layer, the transmittance of the first refracted light can be improved, the transmittance of the second refracted light can be reduced, and the main and auxiliary image transmittance Cr12 can be improved, so that the Cr12≥1000 when the incident angle θ of the incident light is 45°-75°, and the main image formed by the first refracted light is enhanced, and the auxiliary image formed by the second refracted light is weakened or even eliminated, so that the main image captured by the information acquisition device is not disturbed by the auxiliary image, and the final image data is clear enough.

[0010] In a possible implementation, the period distance P of the plurality of nano-cones is less than or equal to 380 nm.

[0011] In a possible implementation, the ratio D / P of the diameter D of the plurality of nano-cones to the period distance P of the plurality of nano-cones is in a range of 0.8≤D / P≤1.2.

[0012] In a possible implementation, the height H of the plurality of nano-cones is in a range of 200 nm≤H≤500 nm.

[0013] In a possible implementation, the ratio H / D of the height H of the plurality of nano-cones to the diameter D of the plurality of nano-cones is less than or equal to 0.5.

[0014] In a possible implementation, the Cr12 is greater than or equal to 2000, or greater than or equal to 3000, or greater than or equal to 5000, or greater than or equal to 8000, or greater than or equal to 10000, or greater than or equal to 20000, or greater than or equal to 50000.

[0015] In a possible implementation, the vehicle window glass is a single glass, and the single glass has an outer surface and an inner surface, and the nano-anti-reflection layer is arranged on the outer surface and / or the inner surface.

[0016] In a possible implementation, the vehicle window glass is a laminated glass, and the laminated glass includes an outer glass sheet, an intermediate layer, and an inner glass sheet, the outer glass sheet has opposite first and second surfaces, the inner glass sheet has opposite third and fourth surfaces, and the intermediate layer connects the second surface and the third surface.

[0017] At least one of the first surface, the second surface, the third surface, and the fourth surface is provided with the nano-anti-reflection layer.

[0018] In one possible implementation, the window glass further includes a substrate covering the information acquisition area, the nano-antireflective layer being disposed on one side surface of the substrate, and the other side surface of the substrate being connected to the surface of the laminated glass.

[0019] In one possible implementation, the window glass further includes a transition layer that covers the information acquisition area, the nano-antireflective layer is disposed on one side surface of the transition layer, and the other side surface of the transition layer is connected to the surface of the laminated glass.

[0020] In one possible implementation, the intermediate layer is provided with a first through groove that penetrates the intermediate layer along the thickness direction. Along the thickness direction of the window glass, the orthographic projection of the first through groove on the second surface completely covers the information collection area.

[0021] In one possible implementation, the inner glass panel is provided with a second through groove, which penetrates the third surface and the fourth surface along the thickness direction of the window glass, and the orthographic projection of the second through groove on the second surface completely covers the information collection area.

[0022] The first surface is provided with the nano-antireflection layer; and / or, the second surface is provided with the nano-antireflection layer, and the nano-antireflection layer is located in the second through groove.

[0023] In one possible implementation, the information acquisition area has a transmittance TL for visible light with wavelengths of 380nm to 780nm incident at a 65° incident angle. (380-780) TL (380-780) ≥60%, or TL (380-780) ≥65%, or TL (380-780) ≥70%, or TL (380-780) ≥75%, or TL (380-780) ≥80%, or TL (380-780) ≥85%.

[0024] In one possible implementation, the information acquisition area has a transmittance TL for near-infrared light with wavelengths of 900nm to 1700nm incident at an incident angle of 65°. (900-1700) TL (900-1700) ≥80%, or TL (900-1700) ≥85%, or TL (900-1700) ≥90%.

[0025] In one possible implementation, the window glass further includes an optical compensation block, which is connected to the surface of the window glass facing the interior of the vehicle and covers the information acquisition area along the thickness direction of the window glass.

[0026] The nano-anti-reflection layer is arranged on a side surface of the optical compensation block facing the vehicle interior.

[0027] In a possible implementation, the central axes of the plurality of nano-cones are parallel to the normal line of the vehicle window glass.

[0028] The second aspect of the present application provides an information collection system, comprising an information collection device and a vehicle window glass as described above, the information collection device comprising a housing and a lens assembly, the lens assembly being accommodated in the housing;

[0029] The information collection device is located in the vehicle interior, the housing is connected with the vehicle window glass, the lens assembly faces the vehicle window glass, and the first refracted light and the second refracted light enter the lens assembly.

[0030] In a possible implementation, the angle between the principal ray in the field of view of the information collection device and the normal line of the vehicle window glass is α;

[0031] The central axes of the plurality of nano-cones are arranged obliquely relative to the normal line of the vehicle window glass, the plurality of nano-cones are obliquely arranged towards the lens assembly, the angle between the central axes of the plurality of nano-cones and the normal line of the vehicle window glass is β, and the β and the α satisfy the following relationship: β = α / 2, or β = α / 2 ± 30°, or β = α / 2 ± 20°, or β = α / 2 ± 10°.

[0032] In a possible implementation, the nano-anti-reflection layer is formed on the surface of the vehicle window glass facing the vehicle interior.

[0033] The information collection system further comprises a cover, the cover comprising a first opening and a second opening, the first opening and the second opening being opposite and communicating;

[0034] The cover is arranged on the laminated glass, the periphery of the first opening is connected with the surface of the vehicle window glass facing the vehicle interior, the periphery of the second opening is connected with the housing, the cover, the housing and the vehicle window glass form an accommodation cavity, and the lens assembly and the nano-anti-reflection layer are located in the accommodation cavity.

[0035] The third aspect of the present application provides a vehicle, comprising a vehicle body and an information collection system as described above, the information collection system being arranged on the vehicle body.

[0036] The beneficial effects of the present application are that, compared with the prior art scheme of designing part of the laminated glass as a wedge shape, the nano-anti-reflection layer in the present application has wideband low reflectivity and high transmittance for incident light in a wide angle range, and the nano-anti-reflection layer has stronger compatibility and better versatility for various installation angles of the vehicle window glass and different models of information collection devices; that is, the same specification of nano-anti-reflection layer can be applied to various application scenarios. Compared with the prior art scheme of setting a correction member, the nano-anti-reflection layer in the present application can be set on multiple surfaces of the vehicle window glass, and the setting position of the nano-anti-reflection layer is more flexible; and the nano-anti-reflection layer does not need to specially drill holes in the vehicle window glass, thereby ensuring the structural strength of the vehicle window glass. Compared with the prior art scheme of setting a polarizer, the nano-anti-reflection layer in the present application can reduce the brightness of the second refracted light while increasing the brightness of the first refracted light, so that the imaging effect of the main image does not need to be optimized by measures such as optimizing the exposure value and improving the sensitivity of the image sensor. Compared with the prior art scheme of forming an anti-reflection film on the vehicle window glass, the nano-anti-reflection layer in the present embodiment has a simple structure. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used by the embodiments of the present application will be described below.

[0038] Figure 1 A schematic diagram of the light path of light from outside the vehicle passing through the vehicle window glass into the information collection device in the prior art;

[0039] Figure 2 A schematic diagram of the structure of a vehicle provided by the embodiments of the present application;

[0040] Figure 3 A schematic diagram of the information collection system of the vehicle window glass shown in the prior art; Figure 2

[0041] Figure 4 A schematic diagram of the first embodiment of the vehicle window glass of the information collection system shown in the prior art, which shows a first embodiment of the laminated glass; Figure 3

[0042] Figure 5 A schematic diagram of the first embodiment of the vehicle window glass of the information collection system shown in the prior art, which shows a schematic diagram of the light path of light passing through the vehicle window glass into the information collection device; Figure 3

[0043] Figure 6 A schematic diagram of the structure of the vehicle window glass along the thickness direction shown in the prior art; Figure 4

[0044] Figure 7 Figure 4 ​​​​​Microstructure diagram of the first angle of one embodiment of the nano-anti-reflection layer shown;

[0045] Figure 8 For Figure 7 Microstructure diagram of the second angle of the nano-anti-reflection layer shown;

[0046] Figure 9 For Figure 4 Cross-sectional structure diagram of one embodiment of the nano-anti-reflection layer shown;

[0047] Figure 10 For Figure 3 Structure diagram of the first embodiment of the vehicle window glass of the information acquisition system shown, in which a second embodiment of the laminated glass is illustrated;

[0048] Figure 11 For Figure 3 Structure diagram of the first embodiment of the vehicle window glass of the information acquisition system shown, in which a third embodiment of the laminated glass is illustrated;

[0049] Figure 12 For Figure 4 Cross-sectional structure diagram of another embodiment of the nano-anti-reflection layer shown;

[0050] Figure 13 For Figure 3 Structure diagram of the first embodiment of the vehicle window glass of the information acquisition system shown, in which one embodiment of the nano-anti-reflection layer is provided on the outer surface of the vehicle window glass;

[0051] Figure 14 For Figure 3 Structure diagram of the second embodiment of the vehicle window glass of the information acquisition system shown;

[0052] Figure 15 For Figure 3 Structure diagram of the third embodiment of the vehicle window glass of the information acquisition system shown;

[0053] Figure 16 For Figure 3 Structure diagram of the fourth embodiment of the vehicle window glass of the information acquisition system shown;

[0054] Figure 17 For Figure 3 Structure diagram of the fifth embodiment of the vehicle window glass of the information acquisition system shown, in which a first embodiment of the laminated glass is illustrated;

[0055] Figure 18 For Figure 3 Structure diagram of the fifth embodiment of the vehicle window glass of the information acquisition system shown, in which a second embodiment of the laminated glass is illustrated;

[0056] Figure 19 For Figure 3 the fifth embodiment of the vehicle window glass of the information acquisition system shown in FIG. 5, in which a third implementation of the laminated glass is shown;

[0057] Figure 20 For Figure 3 the sixth embodiment of the vehicle window glass of the information acquisition system shown in FIG. 6, in which a first implementation of the laminated glass is shown;

[0058] Figure 21 For Figure 3 the sixth embodiment of the vehicle window glass of the information acquisition system shown in FIG. 6, in which a second implementation of the laminated glass is shown;

[0059] Figure 22 For Figure 3 the sixth embodiment of the vehicle window glass of the information acquisition system shown in FIG. 6, in which a third implementation of the laminated glass is shown. DETAILED DESCRIPTION

[0060] For the convenience of understanding, the terms involved in the embodiments of the present application are first explained.

[0061] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0062] Please refer to Figure 1 , the vehicle in the prior art generally comprises a vehicle window glass 10c and an information acquisition device 200c. The vehicle window glass 10c comprises an outer glass plate 11c, an intermediate layer 12c and an inner glass plate 13c, and the intermediate layer 12c is arranged between the outer glass plate 11c and the inner glass plate 13c. The outer glass plate 11c comprises a first surface 111c and a second surface 112c arranged oppositely. The first surface 111c serves as an outer surface of the vehicle window glass 10c, the first surface 111c faces the outside of the vehicle, and the second surface 112c faces the intermediate layer 12c. The inner glass plate 13c comprises a third surface 131c and a fourth surface 132c arranged oppositely. The third surface 131c faces the intermediate layer 12c, and the fourth surface 132c serves as an inner surface of the vehicle window glass 10c, the fourth surface 132c faces the inside of the vehicle. The intermediate layer 12c connects the second surface 112c and the third surface 131c. The information acquisition device 200c is located inside the vehicle. The information acquisition device 200c faces the vehicle window glass 10c and can process the driving environment outside the vehicle into image data by shooting.

[0063] The light rays outside the vehicle, i.e. incident light T0, are incident to the first surface 111c of the vehicle window glass 10c, part of the incident light T0 is reflected at the first surface 111c and does not enter the vehicle window glass 10c, and another part of the incident light T0 is refracted at the first surface 111c and enters the vehicle window glass 10c, and the light rays refracted into the vehicle window glass 10c propagate to the fourth surface 132c; part of the light rays refracted into the vehicle window glass 10c is refracted at the fourth surface 132c for the first time to form the first refracted light T1 inside the vehicle, and the first refracted light T1 continues to transmit and is received by the information acquisition device 200c, and the information acquisition device 200c processes the received first refracted light T1 to form image data as a main image. Another part of the light rays refracted into the vehicle window glass 10c is reflected at the fourth surface 132c for the first time, and then transmits in the vehicle window glass 10c to the first surface 111c for the second time, and then transmits to the fourth surface 132c for the second time, and the light rays refracted into the vehicle for the second time are the second refracted light T2, and the second refracted light T2 continues to transmit and is received by the information acquisition device 200c, and the information acquisition device 200c processes the received second refracted light T2 to form image data as a secondary image. Among them, the light rays forming the main image are the first refracted light T1, and the light rays forming the secondary image are the second refracted light T2. There is an angular deviation between the secondary image and the main image, i.e. the secondary image deviates, and the secondary image deviation will affect the accurate recognition of the image and is not conducive to obtaining accurate driving information. The detection of the secondary image deviation can be carried out according to the standard “GB / T 5137.2-2020 Test Methods for Automotive Safety Glass Part 2: Test for Optical Properties”.

[0064] It should be noted that the incident light T0 is natural light or light from artificial light sources, and the natural light and almost all light from artificial light sources (LED, incandescent lamp, fluorescent lamp, etc.) are non-polarized or weakly polarized. There can be third refracted light, fourth refracted light or even more refracted light in the vehicle window glass 10c: the third refracted light is refracted at the fourth surface 132c for the third time, the fourth refracted light is refracted at the first surface 111c for the fourth time, and the fourth refracted light is refracted at the fourth surface 132c for the fourth time, and the light rays refracted into the vehicle for the third time are the third refracted light; the fifth refracted light is refracted at the fourth surface 132c for the fifth time, the sixth refracted light is refracted at the first surface 111c for the sixth time, and the fourth refracted light is refracted at the fourth surface 132c for the fourth time, and the light rays refracted into the vehicle for the fourth time are the fourth refracted light. The brightness of the images formed by the third refracted light, the fourth refracted light or even more refracted light is extremely low, and almost invisible in real and conventional scenes, so this application does not make specific description and illustration.

[0065] Please refer to Figure 2 and Figure 3The application provides a vehicle 1000. The vehicle 1000 comprises a vehicle body 400 and an information collection system 300. The information collection system 300 is installed on the vehicle body 400. The information collection system 300 comprises an information collection device 200 and a vehicle window glass 100. The information collection device 200 is located inside the vehicle 1000, and the information collection device 200 faces the vehicle window glass 100. The vehicle window glass 100 is installed in an opening of the vehicle body 400. The vehicle window glass 100 has an information collection area S1, and the information collection area S1 is provided with a nano anti-reflection layer 20. Light outside the vehicle 1000, i.e., incident light T0, passes through the information collection area S1 and the nano anti-reflection layer 20 of the vehicle window glass 100 to form first refracted light T1 and second refracted light T2, and the first refracted light T1 and the second refracted light T2 are received by the information collection device 200. The information collection device 200 can process the driving environment outside the vehicle 1000 into image data. The nano anti-reflection layer 20 is used to increase the transmittance of the first refracted light T1 and reduce the transmittance of the second refracted light T2, so as to greatly reduce the brightness of a secondary image, and then weaken or even make the secondary image not obvious or even almost invisible, so that the image data processed by the information collection device 200 is clear enough.

[0066] It should be noted that the vehicle 1000 described in the application can be, but is not limited to, a vehicle such as a car, a train, and a rail transit. The vehicle window glass 100 can be, but is not limited to, a front windshield, a side window glass, a rear windshield, a sunroof glass, and the like of the vehicle 1000. The information collection device 200 can be, but is not limited to, a visible light camera, a near-infrared camera, a thermal imager, a laser radar, and the like. The embodiments of the application are described by taking the vehicle 1000 as a car, the vehicle window glass 100 as a front windshield, and the information collection device 200 as a visible light camera.

[0067] In the application, the transmittance of the first refracted light T1 received by the information collection device 200 is defined as TL1, the transmittance of the second refracted light T2 received by the information collection device 200 is defined as TL2, and the ratio of TL1 and TL2 is defined as a main-secondary image transmittance Cr12, Cr12 = TL1 / TL2. By arranging the nano anti-reflection layer 20, the transmittance of the first refracted light T1 is enhanced, and the transmittance of the second refracted light T2 is weakened, that is, TL1 is increased, and TL2 is decreased, so that the main-secondary image transmittance Cr12 is obviously increased.

[0068] It is understandable that the larger the transmittance ratio Cr12 of the primary and secondary images, the smaller the transmittance TL2, and the less second refracted light T2 received by the information acquisition device 200, making the secondary image less obvious or even almost invisible; conversely, the smaller the transmittance ratio Cr12 of the primary and secondary images, the larger the transmittance TL2, and the more second refracted light T2 received by the information acquisition device 200, making the secondary image more obvious. This application, by adding a nano antireflection layer 20, can improve the transmittance ratio Cr12 of the primary and secondary images, thereby achieving Cr12 ≥ 1000 when the incident angle θ of the incident light T0 is 45° to 75°, thus weakening or even eliminating the secondary image, so that the primary image captured and processed by the information acquisition device 200 is not interfered with by the secondary image, and the final image data obtained is clear enough. Preferably, Cr12 ≥ 2000, or Cr12 ≥ 3000, or Cr12 ≥ 5000, or Cr12 ≥ 8000, or Cr12 ≥ 10000, or Cr12 ≥ 20000, or Cr12 ≥ 50000, etc., are beneficial to make the secondary image almost disappear and become invisible.

[0069] To meet the requirements of high-resolution cameras, the preferred information acquisition area S1 has a transmittance TL of at least 60% for visible light with wavelengths of 380nm to 780nm incident at a 65° angle of incidence. (380-780) More preferably, it has a transmittance of at least 65%, even more preferably, it has a transmittance of at least 70%, even more preferably, it has a transmittance of at least 75%, even more preferably, it has a transmittance of at least 80%, and even more preferably, it has a transmittance of at least 85%. TL (380-780) The transmittance of the information acquisition area S1 for visible light with wavelengths of 380nm to 780nm incident at an incident angle of 65°.

[0070] To meet the requirements of high-pixel cameras, the transmittance TL of the information acquisition area S1 for red light with a wavelength of 600nm to 700nm incident at a 65° angle is also preferred. (600-700) The transmittance TL of the information acquisition area S1 for visible light with wavelengths of 380nm to 780nm incident at an incident angle of 65°. (380-780) The ratio between them is greater than or equal to 0.8, i.e., TL (600-700) / TL (380-780) ≥0.8, specifically examples include 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, etc., with TL being more preferred. (600-700) / TL (380-780) ≥0.83, further optimization of TL (600-700) / TL (380-780) ≥0.85. TL (600-700) The transmittance of information acquisition area S1 for red light with wavelengths of 600nm to 700nm incident at an incident angle of 65°.

[0071] In the present application, the information collection device 200 can be a visible light camera, which is selected from at least one of a standard camera, a narrow-angle camera and a wide-angle camera. The field of view FOV of the visible light camera is the maximum field of view range when image data is collected, which can be divided into a horizontal field of view (HFOV) and a vertical field of view (VFOV). Among them, the horizontal field of view HFOV of the standard camera ranges from 40°≤HFOV≤90°, and the maximum detection distance is less than or equal to 200 meters. The standard camera can be used as the main information collection device 200 in the advanced driving assistance system (ADAS, Advanced Driving Assistance System) or autonomous driving system (ADS, Autonomous Driving System) above L2 level. The horizontal field of view HFOV of the narrow-angle camera ranges from HFOV<40°, and the maximum detection distance is less than or equal to 300 meters. The narrow-angle camera is mainly used for identifying long-distance objects, and can be used for identifying targets such as traffic lights and pedestrians. The horizontal field of view HFOV of the wide-angle camera ranges from 90°<HFOV≤180°, and the maximum detection distance is less than or equal to 80 meters. The wide-angle camera is mainly used for identifying close-range objects, and can be used in urban road working conditions, low-speed driving and other scenes.

[0072] The visible light camera can be a low-pixel camera with less than 2 million pixels, for example, an 800,000-pixel camera, a 1 million-pixel camera. The visible light camera can also be a high-pixel camera with more than or equal to 2 million pixels, and more preferably a high-pixel camera with more than or equal to 5 million pixels, for example, a 2 million-pixel camera, a 5 million-pixel camera, an 8 million-pixel camera, a 12 million-pixel camera, a 20 million-pixel camera, a 50 million-pixel camera, a 100 million-pixel camera, a 200 million-pixel camera. The high-pixel camera has a longer detection distance and a larger horizontal field of view HFOV. The high-pixel camera also has a higher dynamic range (HDR, High Dynamic Range Imaging) and a better LED frequency flash elimination function (LFM, Linear Frequency Modulation).

[0073] The number of information collection devices 200 can be one, two, three, four or more, but is not limited thereto. For example, the information collection device 200 is a visible light camera, which is used to realize functions such as forward collision warning (FCW), lane departure warning (LDW), traffic sign recognition (TSR), and pedestrian collision warning (PCW).

[0074] Please refer to Figure 3 In this application, the information collection device 200 includes a housing 210, a lens assembly 220, an image sensor 230, an image signal processor, a serializer, and a connector. The lens assembly 220, the image sensor 230, the image signal processor, and the serializer are located in the housing 210. The connector is connected to the housing 210.

[0075] The lens assembly 220 can include optical lenses, optical filters, and protective films. Specifically, the optical lenses are used to focus light and project objects in the field of view to the light-sensitive surface of the image sensor 230. Depending on the requirements of the imaging effect, there can be multiple layers of optical lenses. The optical filters are used to filter out light wave bands that cannot be seen by the human eye, leaving only the visible light wave bands of the actual scenery within the field of view of the human eye. The protective films are used to protect the optical lenses and / or optical filters from being severely worn, which affects the clarity of the image data obtained by the information collection device 200.

[0076] The image sensor 230 can convert the light image on the light-sensitive surface into an electrical signal in a corresponding proportional relationship with the light image using the photoelectric conversion function of the photoelectric device. The image sensor 230 is mainly divided into CCD and CMOS. The image signal processor mainly uses a hardware structure to complete the preprocessing of the RAW format data of the image video source input by the image sensor 230, which can be converted into formats such as YCbCr. The image signal processor can also complete various operations such as image scaling, automatic exposure, automatic white balance, and automatic focusing. The serializer is used to transmit the processed image data, which can be used to transmit various types of image data such as RGB and YUV. The connector is used to connect and fix the information collection device 200.

[0077] For ease of description, the vertical direction of the vehicle window glass 100 is defined as the direction extending from the bottom edge of the vehicle window glass 100 to the top edge of the vehicle window glass 100 after the vehicle window glass 100 is installed on the vehicle 1000.

[0078] Please refer to Figure 4 and Figure 5 ​The first embodiment of the vehicle window glass 100 is provided. In this embodiment, the vehicle window glass 100 is a laminated glass. The nano-anti-reflection layer 20 is directly formed on the surface of the laminated glass. The laminated glass includes an outer glass sheet 11, an interlayer 12, and an inner glass sheet 13, and the interlayer 12 is interposed between the outer glass sheet 11 and the inner glass sheet 13. The outer glass sheet 11 includes a first surface 111 and a second surface 112 which are disposed back to back. The first surface 111 serves as an outer surface of the vehicle window glass 100, and the first surface 111 faces the outside of the vehicle 1000, and the second surface 112 faces the interlayer 12. The inner glass sheet 13 includes a third surface 131 and a fourth surface 132 which are disposed back to back. The third surface 131 faces the interlayer 12, and the fourth surface 132 serves as an inner surface of the vehicle window glass 100, and the fourth surface 132 faces the inside of the vehicle 1000. The interlayer 12 connects the second surface 112 and the third surface 131.

[0079] The outer glass sheet 11 is transparent glass or colored glass, the thickness of the outer glass sheet 11 is 1.8 mm to 3.5 mm, and the visible light transmittance of the outer glass sheet 11 is greater than or equal to 70%. The cross section of the outer glass sheet 11 in the thickness direction (the cross section extends in the thickness direction of the outer glass sheet 11) is rectangular or wedge-shaped. The inner glass sheet 13 is transparent glass or colored glass, the thickness of the inner glass sheet 13 is 0.7 mm to 2.5 mm, and the visible light transmittance of the inner glass sheet 13 is greater than or equal to 70%. The cross section of the inner glass sheet 13 in the thickness direction (the cross section extends in the thickness direction of the inner glass sheet 13) is rectangular or wedge-shaped. The total iron content (calculated as Fe2O3) of the transparent glass is less than or equal to 0.1%, even less than or equal to 0.05%, further less than or equal to 0.01%, and the visible light transmittance of the transparent glass is 80% to 95%; the total iron content (calculated as Fe2O3) of the colored glass is 0.1% to 0.8%, preferably 0.1% to 0.5%, and the visible light transmittance of the colored glass is 70% to 90%. For example, the outer glass sheet 11 can be transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, and the inner glass sheet 13 can be green glass with a thickness of 1.6 mm and a visible light transmittance of 83%, or green glass with a thickness of 2.1 mm and a visible light transmittance of 80%.

[0080] The intermediate layer 12 is a transparent thermoplastic polymer film or a colored thermoplastic polymer film, and the thickness of the intermediate layer 12 is 0.38mm to 2.28mm. For example, the thickness of the intermediate layer 12 can be, but is not limited to, 0.38mm, or 0.76mm, or 1.14mm, or 1.52mm, or 1.9mm, or 2.28mm, or other values between 0.38mm and 2.28mm. The cross section of the intermediate layer 12 in the thickness direction (the cross section extends along the thickness direction of the intermediate layer 12) is rectangular or wedge-shaped. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), and ionomer (SentryGlas Plus, SGP). When the intermediate layer 12 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 80%. For example, the visible light transmittance of the intermediate layer 12 can be, but is not limited to, 80%, or 85%, or 90%, or 95%, etc. When the intermediate layer 12 is a colored thermoplastic polymer film, the visible light transmittance of the colored thermoplastic polymer film is greater than or equal to 80%. For example, the visible light transmittance of the intermediate layer 12 can be, but is not limited to, 80%, or 85%, or 90%, etc. The colored thermoplastic polymer film can be a gray thermoplastic polymer film, a green thermoplastic polymer film, or a blue thermoplastic polymer film. The intermediate layer 12 can be a single-layer structure or a multi-layer structure, for example, a double-layer structure, a triple-layer structure, a four-layer structure, a five-layer structure, etc. The intermediate layer 12 can also have other functions, for example, at least one colored area is provided as a shading band to reduce the interference of sunlight on the human eye, or an infrared absorber is added to have a sunscreen or heat insulation function, or an ultraviolet absorber is added to have an ultraviolet shielding function, or the plasticizer content of at least one layer of the multi-layer structure is higher to have a sound insulation function.

[0081] Please refer to Figure 6The vehicle window glass 100 has an information collection area S1 and a non-information collection area S2. The information collection device 200 transmits the driving environment outside the vehicle 1000 through the information collection area S1 to process the image data, and the light outside the vehicle 1000 passes through the information collection area S1 and is received by the information collection device 200. The non-information collection area S2 includes a transparent area S21 and a shielding area S22. The visible light transmittance of the transparent area S21 is greater than or equal to 70%, so as to facilitate the driver to observe the outside environment through the transparent area S21. The visible light transmittance of the shielding area S22 is less than or equal to 5%, so as to play a shielding, protection and overall aesthetic effect. Preferably, the visible light transmittance of the shielding area S22 is less than or equal to 3%, more preferably less than or equal to 1%, further less than or equal to 0.5%, and even almost equal to 0, that is, no light transmittance. Optionally, the shielding area S22 is arranged around the periphery of the transparent area S21. Further optionally, the shielding area S22 is also arranged around the periphery of the information collection area S1.

[0082] Specifically, the shielding area S22 can be formed by a shielding layer arranged on at least one of the second surface 112, the third surface 131 and the fourth surface 132. The material of the shielding layer can be ceramic ink or ultraviolet ink. The ceramic ink or ultraviolet ink is printed on the second surface 112, the third surface 131 and / or the fourth surface 132 by screen printing, inkjet printing or other processes, and the shielding layer is formed after curing or high-temperature sintering. The thickness of the shielding layer is 5 μm to 40 μm.

[0083] It should be noted that the information collection device 200 can be directly fixed on the inner surface of the laminated glass through a connector (such as a camera bracket, etc.), that is, fixed on the fourth surface 132, so as to facilitate the integration of the information collection system 300. In other embodiments, the information collection device 200 can also be fixed on the vehicle body 400 through the connector.

[0084] A first laminated glass is prepared, which is composed of an outer glass sheet 11, an interlayer 12 and an inner glass sheet 13. The outer glass sheet 11 and the inner glass sheet 13 are both transparent glass with a thickness of 2.1 mm and a refractive index of 1.52, and the interlayer 12 is transparent PVB with a thickness of 0.76 mm and a refractive index of 1.49. A second laminated glass is prepared, which is composed of an outer glass sheet 11, an interlayer 12 and an inner glass sheet 13. The outer glass sheet 11 and the inner glass sheet 13 are both green glass with a thickness of 2.1 mm and a refractive index of 1.52, and the interlayer 12 is transparent PVB with a thickness of 0.76 mm and a refractive index of 1.49. The transmittance of the first laminated glass for visible light at normal incidence (0 incident angle) is 88.8% and the transmittance of the second laminated glass for visible light at normal incidence (0 incident angle) is 74.6% as measured by a spectrophotometer (Company: PERKINELMER, Model: LAMBDA950) according to the standard GB9656. The light rays, i.e. incident light T0, from outside the vehicle 1000 undergo multiple refractions and reflections when passing through the laminated glass to enter the inside of the vehicle 1000. The refractive angle, reflection ratio, transmittance and light intensity of the light rays at each interface of the laminated glass can be calculated by Snell's Law, Fresnel Formula and Beer-Lambert Law. It is assumed that the nano-antireflection layer 20 is provided on the inner surface of the first laminated glass to form a first vehicle window glass. It is assumed that the nano-antireflection layer 20 is provided on the inner surface of the second laminated glass to form a second vehicle window glass.

[0085] For convenience of description, the reflectivity of the inner surface provided with the nano-antireflection layer 20 is referred to as the reflectivity of the nano-antireflection layer 20. According to the above three laws, the Cr12 values of the first vehicle window glass and the second vehicle window glass in the ideal state are calculated. It is known that, under specific glass combinations and incident angles, the main and auxiliary image transmittance Cr12 presents a monotonous increasing trend with the decrease of the visible light reflectivity of the nano-antireflection layer 20, because the transmittance of the first refracted light T1 increases and the transmittance of the second refracted light T2 decreases. Taking the first vehicle window glass as an example, when the incident angle is 45° and the visible light reflectivity of the nano-antireflection layer 20 is 2.0%, the main and auxiliary image transmittance Cr12 = 1057; when the incident angle is 75°, the visible light reflectivity of the nano-antireflection layer 20 needs to be less than 0.48% to make the main and auxiliary image transmittance Cr12 greater than 1000:1. Taking the second vehicle window glass as an example, when the incident angle is 45° and the visible light reflectivity of the nano-antireflection layer 20 is 2.0%, the main and auxiliary image transmittance Cr12 = 1565; when the incident angle is 75°, the visible light reflectivity of the nano-antireflection layer 20 needs to be less than 0.75% to make the main and auxiliary image transmittance Cr12 greater than 1000:1.

[0086] For a specific glass combination, as the incident angle θ increases, the main and secondary image transmittance Cr12 of the second vehicle window glass decreases, which is due to the increase of the reflectivity of light at the interface of the laminated glass, the decrease of the transmittance of the first refracted light T1, and the increase of the transmittance of the second refracted light T2.

[0087] For a specific visible light reflectivity of the nano-antireflection layer 20 and incident angle, compared with the first vehicle window glass, the second vehicle window glass has smaller visible light transmittance and larger main and secondary image transmittance Cr12. This is because the outer glass plate 11 and the inner glass plate 13 of the second vehicle window glass are both colored glass, and the outer glass plate 11 and the inner glass plate 13 have absorption to visible light, the transmittance of the second refracted light T2 decreases relatively more, and the main and secondary image transmittance Cr12 increases more. Therefore, reducing the visible light transmittance of the laminated glass is beneficial to make the vehicle window glass 100 have larger main and secondary image transmittance Cr12.

[0088] In summary, for different glass combinations and different incident angles, the visible light reflectivity of the nano-antireflection layer 20 corresponding to the given main and secondary image transmittance Cr12 is different. Through the cooperation of glass combination, incident angle and visible light reflectivity of the nano-antireflection layer 20, the main and secondary image transmittance Cr12 can be greater than 1000:1, and the secondary image will become dark enough, and the image taken by the information acquisition device 200 will be significantly clear.

[0089] Please refer to Figure 7 , Figure 8 and Figure 9 In this embodiment, the nano-antireflection layer 20 includes a plurality of nano-cones 21. The nano-cones 21 are all conical. The plurality of nano-cones 21 are periodically arranged.

[0090] Please refer to Figure 9The heights of the plurality of nanocones 21 are the same, and the heights of the plurality of nanocones 21 are H. The height of the nanocone 21 refers to the distance between the top and the bottom of the nanocone 21. The refractive index of the nano-anti-reflection layer 20 is equivalent to a refractive index gradient multilayer film. The greater the value of H, the more gradual the change in the gradient refractive index, and the smaller the Fresnel reflection caused by the refractive index of the polarized light. This is beneficial to make the nano-anti-reflection layer 20 have superior low reflectivity under wide-angle incident light. However, the greater the value of H, the poorer the mechanical strength of the nanocone 21, for example, the nanocone 21 is prone to brittle fracture, resulting in a decrease in the wear resistance of the nano-anti-reflection layer 20; the production difficulty of the nanocone 21 will also increase. In addition, the greater the value of H, the nanocone 21 will also scatter short-wavelength light, resulting in an increase in the reflection of short-wavelength light. In combination, in order to achieve high-efficiency anti-reflection in the visible light band (380nm-780nm) and the near-infrared band (900nm-1700nm), the height H of the nanocone 21 ranges from 200nm to 500nm. Preferably, the range of H is 350nm≤H≤450nm.

[0091] The periodical distance of the plurality of nanocones 21 is P, that is, the distance between the center axes Q of two adjacent nanocones 21. The periodical distance P of the nanocone 21 needs to be matched with the wavelength range to be achieved anti-reflection, otherwise, the periodical distance P of the nanocone 21 greater than the wavelength of the incident light T0 will result in a decrease in the transmittance, that is, a decrease in the anti-reflection effect. In this embodiment, in order to achieve high-efficiency anti-reflection in the visible light band (380nm-780nm) and the near-infrared band (900nm-1700nm), the periodical distance P≤380nm. In combination with the influence of the production and manufacturing process on the periodical distance P, the periodical distance P of the plurality of nanocones 21 is ≤350nm.

[0092] The anti-reflection principle of the plurality of nanocones 21 is that when the periodical distance of the plurality of nanocones 21 is less than the wavelength of the incident light, all diffractions except zero-order diffraction can be suppressed, that is, only zero-order reflected light is generated in optics, and the optical properties can be regarded as a homogeneous film according to the equivalent medium theory, and the structure refractive index is equivalent to a refractive index gradient multilayer film; the refractive index of light in air is 1, then the refractive index gradually increases as it propagates from the tip of the plurality of nanocones 21 downward, and finally reaches the maximum at the bottom of the plurality of nanocones 21, which avoids the sharp change of the refractive index, thereby reducing the surface reflectivity.

[0093] The preparation method of the plurality of nanocones 21 includes inclined deposition, dry etching, wet etching and the like, and the basic principle is to realize the gradient change of the refractive index by changing the filling factor of a certain medium material and air.

[0094] Among them, the oblique angle deposition (OAD) refers to the deposition of thin films at a certain angle (such as 50° or 70°) oblique incidence, by controlling the deposition parameters (deposition angle, deposition rate, distance between the substrate and the evaporation source and other parameters), so as to obtain a deposition nanostructure with oblique or special morphology, and then obtain the film layer with the required refractive index. The deposition methods include thermal evaporation, magnetron sputtering, ion-assisted electron beam deposition, laser pulse deposition, plasma enhanced chemical vapor deposition and other deposition technologies.

[0095] Dry etching includes electron beam lithography, interference lithography and nanosphere lithography, etc. Among them, electron beam lithography is a technology that uses an electron beam to directly draw or project a pattern in a polymer mask electron resist layer. Interference lithography is based on the periodic pattern generated by laser beam interference in photoresist. This method can form a specific pattern on a large area, making it scalable to large-scale applications. Nanosphere lithography uses a single layer of nanometer colloidal particles arranged periodically or approximately periodically as an etching mask, and the uncoated substrate is etched to form a nanostructure. The size and specifications of the nanostructure are controlled by parameters such as the size of the colloidal particles, material, etching power, and etching time. For example, a single layer of polystyrene (PS) nanospheres is used as a mask, and reactive ion beam etching is used to etch a specific nanocone array structure. In general, PS nanospheres are closely adjacent, and since the mask has almost no defects, this self-assembly technology is more likely to produce large-size nanostructures with high yield.

[0096] Wet etching is a method of forming a specific pattern of microstructure by etching the surface of a material with a specific chemical reagent. It is usually matched with different shaped masks to prepare a specific morphology nano-microstructure. Wet etching includes chemical and electrochemical methods.

[0097] The plurality of nanocones 21 can have superior broadband low reflectivity and high transmittance under wide-angle incident light, and are less affected by polarization state, thus suitable for various applications from visible light to near-infrared waves. Preferably, the nano-anti-reflection layer 20 formed by the plurality of nanocones 21 has a reflectivity of less than or equal to 0.5% in the visible light wavelength range of 380 nm to 780 nm, further less than or equal to 0.1%, and more further less than or equal to 0.05%. In another embodiment, the nano-anti-reflection layer 20 formed by the plurality of nanocones 21 has a reflectivity of less than or equal to 1% in the infrared wavelength range of 905 nm, further less than or equal to 0.5%, and more further less than or equal to 0.1%. In still another embodiment, the nano-anti-reflection layer 20 formed by the plurality of nanocones 21 has a reflectivity of less than or equal to 1% in the infrared wavelength range of 1550 nm, further less than or equal to 0.8%, and more further less than or equal to 0.65%.

[0098] The plurality of nanocones 21 have the same diameter, and the diameter of the plurality of nanocones 21 is D. The diameter D of the nanocone 21 refers to the diameter of the bottom of the nanocone 21. The smaller the diameter D of the nanocone 21, the worse the anti-reflection effect. In the present embodiment, the diameter D of the nanocone 21 is substantially equal to the periodic pitch P of the plurality of nanocones 21. The ratio D / P of the diameter D of the plurality of nanocones 21 to the periodic pitch P of the plurality of nanocones 21 is in the range of 0.8≤D / P≤1.2.

[0099] The plurality of nanocones 21 can have a pointed cone shape or a round cone shape. When the periodic pitch P of the plurality of nanocones 21 is less than or equal to 380 nm, and the height H of the nanocone 21 is in the range of 200 nm≤H≤500 nm, the transmittance of the nano-anti-reflection layer 20 formed by the periodic arrangement of the nanocones 21 of the two shapes is substantially equivalent in the visible light wavelength range (380 nm to 780 nm) and the near-infrared wavelength range (900 nm to 1700 nm), and only slightly fluctuates in some wavelength ranges. The transmittance difference at long wavelengths (e.g., 1500 nm) increases. The two shapes of nanocones 21 can also be mixed in a certain ratio, and the two shapes of nanocones 21 are arranged periodically. For example, the number ratio of the pointed cone-shaped nanocones 21 to the round cone-shaped nanocones 21 is 1:1, and the pointed cone-shaped nanocones 21 and the round cone-shaped nanocones 21 are arranged alternately, which can make the nano-anti-reflection layer 20 have high transmittance in a wider wavelength range.

[0100] Please continue to see Figure 4In this embodiment, at least one of the first surface 111, the second surface 112, the third surface 131, or the fourth surface 132 of the laminated glass is provided with a nano-antireflective layer 20. The nano-antireflective layer 20 covers the information acquisition area S1. The nano-antireflective layer 20 is formed directly on the surface of the laminated glass. It can be formed by directly depositing multiple nanocones 21 on the surface of the laminated glass, or by etching multiple nanocones 21 onto the surface of the laminated glass.

[0101] When multiple nanocones 21 are directly disposed on the surface of laminated glass, considering the reflection that occurs at the interface of different media, the materials of the nanocones 21 are preferably selected to have the same or similar refractive index as the glass plate on which they are located. More preferably, the refractive index of the nanocones 21 is less than or equal to the refractive index of the glass plate on which they are located. For example, the refractive index of the glass plate on which the multiple nanocones 21 are located is 1.52, and the material of the nanocones 21 can be ultraviolet fused silica. The main component of ultraviolet fused silica is SiO2, and the refractive index of ultraviolet fused silica is 1.46.

[0102] In this embodiment, the laminated glass can be a complete structure or a partial structure with through grooves in certain areas.

[0103] In the first possible implementation, such as Figure 4 The laminated glass has a complete structure. The nano-antireflective layer 20 can be directly formed on the first surface 111, the second surface 112, the third surface 131, or the fourth surface 132. Preferably, the nano-antireflective layer 20 is disposed on the first surface 111 or the fourth surface 132. More preferably, considering the wear resistance of the nano-antireflective layer 20, it is usually disposed on the fourth surface 132 of the laminated glass. The assembly process of the laminated glass is as follows: the outer glass plate 11 and the inner glass plate 13 are respectively bent into shape by a pressing process; the outer glass plate 11 and the inner glass plate 13 are connected by an intermediate layer 12 to form the laminated glass.

[0104] It can be understood that, compared with the prior art of designing part of the laminated glass as a wedge, the nano-anti-reflection layer 20 in the embodiment has wideband low reflectivity and high transmittance for a wide range of incident light, and has stronger compatibility and better versatility for various mounting angles of the vehicle window glass 100 and different models of the information collection device 200; that is, the same specification of the nano-anti-reflection layer 20 can be applied to various application scenarios. Compared with the prior art of setting a correction member, the nano-anti-reflection layer 20 in the embodiment can be arranged on multiple surfaces of the vehicle window glass 100, and the arrangement position of the nano-anti-reflection layer 20 is more flexible; and the nano-anti-reflection layer 20 does not need to be specially drilled on the vehicle window glass 100, thereby ensuring the structural strength of the vehicle window glass 100. Compared with the prior art of setting a polarizer, the nano-anti-reflection layer 20 in the embodiment can reduce the brightness of the second refracted light T2 while increasing the brightness of the first refracted light T1, so that the imaging effect of the main image does not need to be optimized by optimizing the exposure value, improving the sensitivity of the image sensor 230, and the like. Compared with the prior art of forming an anti-reflection film on the vehicle window glass 100, the nano-anti-reflection layer 20 in the embodiment has better anti-reflection effect and simple structure.

[0105] In a second possible implementation, Figure 10 The intermediate layer 12 is provided with a first through groove 122. The first through groove 122 penetrates the two surfaces of the intermediate layer 12 arranged in opposite directions along the thickness direction of the laminated glass. The first through groove 122 completely covers the information collection area S1 in the orthographic projection of the second surface 112 of the outer glass sheet 11 along the thickness direction of the vehicle window glass 100.

[0106] The nano-anti-reflection layer 20 can be arranged on the first surface 111, the second surface 112, the third surface 131, or the fourth surface 132. Preferably, considering the wear resistance of the nano-anti-reflection layer 20, the nano-anti-reflection layer 20 is usually arranged on the surface other than the first surface 111 of the outer glass sheet 11. The number of nano-anti-reflection layers 20 can be one, two, or three. For example, the number of nano-anti-reflection layers 20 is one. The nano-anti-reflection layer 20 is arranged on the fourth surface 132 of the laminated glass. The number of nano-anti-reflection layers 20 is two. One nano-anti-reflection layer 20 is arranged on the fourth surface 132, and the other nano-anti-reflection layer 20 is arranged in the first through groove 122 and arranged on the second surface 112 or the third surface 131. Preferably, the number of nano-anti-reflection layers 20 is three. One nano-anti-reflection layer 20 is arranged on the fourth surface 132, and the other two nano-anti-reflection layers 20 are both arranged in the first through groove 122. One nano-anti-reflection layer 20 arranged in the first through groove 122 is arranged on the third surface 131, and the other nano-anti-reflection layer 20 arranged in the through groove 122 is arranged on the second surface 112.

[0107] It can be understood that, by arranging the first through groove 122 in the interlayer 12, and along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass sheet 11 completely covers the information collection area S1, the height difference existing in the interlayer 12 in a microcosmic sense has little effect on the parallelism between the part of the first surface 111 of the outer glass sheet 11 located in the information collection area S1 and the part of the fourth surface 132 of the inner glass sheet 13 located in the information collection area S1. Thus, compared with not arranging the first through groove 122, the parallelism between the part of the first surface 111 of the outer glass sheet 11 located in the information collection area S1 and the part of the fourth surface 132 of the inner glass sheet 13 located in the information collection area S1 is better. Thus, it is beneficial to reduce the optical distortion of the vehicle window glass 100.

[0108] Arranging the nano-antireflection layer 20 on the second surface 112, the third surface 131 and / or the fourth surface 132 of the vehicle window glass 100 can improve the broadband transmittance of the vehicle window glass 100. Since the thickness of the nano-antireflection layer 20 is extremely thin, the nano-antireflection layer 20 almost has no adverse effect on the degree of optical distortion of the vehicle window glass 100. In this way, both weakening of the secondary image and lower optical distortion can be achieved. When the number of the nano-antireflection layers 20 is multiple, the multiple nano-antireflection layers 20 jointly act to further improve the broadband transmittance of the vehicle window glass 100.

[0109] In a third possible implementation manner, as shown in FIG. 4, Figure 11 The laminated glass is provided with the first through groove 122 and the second through groove 133. The first through groove 122 is arranged in the interlayer 12. Along the thickness direction of the laminated glass, the first through groove 122 penetrates through the two surfaces of the interlayer 12 arranged oppositely. The second through groove 133 is arranged in the inner glass sheet 13. Along the thickness direction of the laminated glass, the second through groove 133 penetrates through the third surface 131 and the fourth surface 132 of the inner glass sheet 13. Along the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass sheet 11 completely covers the information collection area S1, the orthographic projection of the second through groove 133 on the second surface 112 of the outer glass sheet 11 completely covers the information collection area S1, and the first through groove 122 and the second through groove 133 are in communication.

[0110] The nano-antireflection layer 20 can be arranged on the first surface 111 or the second surface 112. Preferably, considering the wear resistance of the nano-antireflection layer 20, the nano-antireflection layer 20 is usually arranged in the first through groove 122, and the nano-antireflection layer 20 is arranged on the second surface 112 of the outer glass sheet 11.

[0111] It can be understood that, in the embodiment, the information collection area S1 of the vehicle window glass 100 is thinned by setting the first through groove 122 at the position corresponding to the information collection area S1 in the intermediate layer 12 and setting the second through groove 133 at the position corresponding to the information collection area S1 in the inner glass plate 13, while keeping the outer glass plate 11 intact. When the light passes through the information collection area S1 to enter the inside of the vehicle 1000, it only needs to pass through the first surface 111 and the second surface 112 of the outer glass plate 11. Compared with the consistency of the first surface 111 of the outer glass plate 11 and the fourth surface 132 of the inner glass plate 13, the consistency of the first surface 111 and the second surface 112 of the outer glass plate 11 is better, thus being conducive to reducing the light distortion of the vehicle window glass 100. Generally, the light distortion of the vehicle window glass 100 in the embodiment can reach 35 mdpt or even lower.

[0112] On the basis of thinning the information collection area S1 of the vehicle window glass 100, the nano-anti-reflection layer 20 is arranged on the second surface 112 of the outer glass plate 11. Since the thickness of the nano-anti-reflection layer 20 is extremely thin, the nano-anti-reflection layer 20 almost has no adverse effect on the degree of light distortion of the vehicle window glass 100. In this way, both weakening of the secondary image and lower light distortion can be achieved.

[0113] In a fourth possible embodiment, the cross section of the information collection area S1 of the vehicle window glass 100 along the vertical direction is in a wedge shape. The wedge angle of the information collection area S1 can make the secondary image deviation angle (the included angle of the first refracted light T1 and the second refracted light T2) of the information collection area S1 less than or equal to 3 arcmin. It can be understood that, from the top to the bottom of the information collection area S1, the thickness of the information collection area S1 along the vertical direction gradually decreases; that is, the first surface 111 of the outer glass plate 11 and the fourth surface 132 of the inner glass plate 13 are at least relatively inclined at the information collection area S1. One or more of the outer glass plate 11, the intermediate layer 12 and the inner glass plate 13 can be at least in a wedge shape along the vertical direction at the information collection area S1, so that the information collection area S1 as a whole is in a wedge shape. For example, the cross section of the outer glass plate 11 along the vertical direction at the information collection area S1 is in a wedge shape, and the wedge angle of the outer glass plate 11 ranges from 0.03 mrad to 0.40 mrad. For example, the wedge angle of the outer glass plate 11 can be 0.03 mrad, 0.13 mrad, 0.23 mrad, 0.33 mrad, 0.40 mrad, etc. The cross sections of the intermediate layer 12 and the inner glass plate 13 along the vertical direction are both in a rectangular shape.

[0114] The nano-anti-reflection layer 20 can be directly formed on the first surface 111, the second surface 112, the third surface 131 or the fourth surface 132. Preferably, the nano-anti-reflection layer 20 is arranged on the first surface 111 or the fourth surface 132. Further preferably, the nano-anti-reflection layer 20 is arranged on the fourth surface 132 of the laminated glass in consideration of the wear resistance of the nano-anti-reflection layer 20.

[0115] It can be understood that, by arranging the nano-anti-reflection layer 20 in the information collection area S1, the secondary image can be weakened. In the embodiment, by designing the cross section of the information collection area S1 of the vehicle window glass 100 along the vertical direction as a wedge shape, the wedge angle of the information collection area S1 can make the deviation angle of the secondary image of the information collection area S1 less than or equal to 3 arcmin, thereby improving the coincidence degree of the secondary image and the primary image, and further reducing the interference of the secondary image on the primary image, and improving the definition of the image obtained by the information collection device 200.

[0116] In other embodiments, the vehicle window glass 100 can also be a single piece of glass. Preferably, the vehicle window glass 100 is a single piece of strengthened glass. For example, the vehicle window glass 100 is a single piece of tempered glass. The single piece of glass has an outer surface and an inner surface. The outer surface of the single piece of glass is the outer surface of the vehicle window glass 100, and faces the outside of the vehicle 1000. The inner surface of the single piece of glass is the inner surface of the vehicle window glass 100, and faces the inside of the vehicle 1000. The nano-anti-reflection layer 20 can be arranged on the outer surface or the inner surface of the single piece of glass.

[0117] Please refer to Figure 9 and Figure 12 In the embodiment, the central axes Q of the plurality of nano-cones 21 and the normal line O of the vehicle window glass 100 can be parallel to each other, or can be arranged at an angle.

[0118] In one possible embodiment, as shown in Figure 9 , the central axes Q of the plurality of nano-cones 21 are parallel to the normal line O of the vehicle window glass 100 (allowing a certain process tolerance).

[0119] In another possible embodiment, as shown in Figure 12 , the central axes Q of the plurality of nano-cones 21 are all inclined relative to the normal line O of the vehicle window glass 100 and towards the lens assembly 220 of the information collection device 200. The angle between the central axes Q of the plurality of nano-cones 21 and the normal line O of the laminated glass is β. β should not be too large, otherwise it is easy to cause the gap at the bottom of the nano-cone 21 to be uneven and the manufacturing difficulty to increase, and thus the anti-reflection effect of the nano-anti-reflection layer 20 to decrease.

[0120] In order to simplify the calculation, the angle between the principal ray L in the field of view angle range of the information collection device 200 (i.e. the light ray located at the center of the field of view angle range of the information collection device 200) and the normal O of the laminated glass is set as the oblique incidence angle a. β = a / 2. In order to make the nano-anti-reflection layer 20 have low reflectivity in a wide-angle range, β = a / 2 ± 30°, or β = a / 2 ± 20°, or β = a / 2 ± 10° is considered on the basis of the compatibility of the nano-anti-reflection layer 20 with different types of information collection devices 200. For example, a = 70°, and β can be selected from 5° to 65°, or β can be selected from 15° to 55°, or β can be selected from 25° to 45°.

[0121] It can be understood that by tilting the central axis Q of the plurality of nano-cones 21 relative to the normal O of the laminated glass towards the lens assembly 220 of the information collection device 200, the angle between the light ray incident at a high incidence angle and the central axis Q of the plurality of nano-cones 21 can be reduced, thereby reducing the reflectivity of the information collection area S1 of the vehicle window glass 100 to light rays incident at a high angle (such as an incidence angle of 70°).

[0122] It should be noted that, Figure 9 and Figure 12 In the nano-anti-reflection layer 20 is only set on the fourth surface 132 as an example, the extension direction of the central axis Q of the plurality of nano-cones 21 is described, which does not form a limitation on the specific setting position of the nano-anti-reflection layer 20. It can be understood that when the nano-anti-reflection layer 20 is set on the first surface 111, the second surface 112, and the third surface 131, it can also be referred to.

[0123] In the present embodiment, as Figure 13 In order to improve the anti-reflection effect of the vehicle window glass 100, the nano-anti-reflection layer 20 is usually set on the outer surface of the vehicle window glass 100 and other surfaces of the vehicle window glass 100. Under the same test conditions, the anti-reflection effect of the nano-anti-reflection layer 20 set on the other surfaces of the vehicle window glass 100 is better than that of the nano-anti-reflection layer 20 set on the outer surface of the vehicle window glass 100.

[0124] When the nano-anti-reflection layer 20 is set on the outer surface of the vehicle window glass 100, the shape of the plurality of nano-cones 21 is preferably a circular cone shape. The periodic pitch of the plurality of nano-cones 21 is preferably 100 nm ≤ P ≤ 380 nm. Further preferably, 100 nm ≤ P ≤ 350 nm, or 100 nm ≤ P ≤ 300 nm, or 100 nm ≤ P ≤ 200 nm. The ratio of the diameter D of the plurality of nano-cones 21 to the periodic pitch P is preferably in the range of 0.9 ≤ D / P ≤ 1.1. The ratio H / D of the height H of the plurality of nano-cones 21 to the diameter D of the plurality of nano-cones is H / D ≤ 0.5. Preferably, H / D ≤ 0.4. It can be understood that the smaller H / D is, the better the mechanical properties of the nano-anti-reflection layer 20 formed by the plurality of nano-cones 21.

[0125] It can be understood that when the anti-reflective effect of the vehicle window glass 100 requires a higher level, only setting the nano anti-reflective layer 20 on a single surface of the vehicle window glass 100 can not meet the anti-reflective requirements of the vehicle window glass 100. By setting the nano anti-reflective layer 20 on the outer surface of the laminated glass, the anti-reflective effect of the vehicle window glass 100 can be further improved.

[0126] Please refer to Figure 14 The second embodiment of the vehicle window glass 100 is provided in the present application. The difference between the second embodiment and the first embodiment is that the vehicle window glass 100 further comprises a substrate 50. The nano anti-reflective layer 20 is indirectly connected with the laminated glass through the substrate 50.

[0127] It should be noted that in the present embodiment, only the case that the nano anti-reflective layer 20 is connected with the fourth surface 132 of the laminated glass through the substrate 50 is taken as an example for description, and the connection of the nano anti-reflective layer 20 with any other surface of the laminated glass through the substrate 50 can be referred to.

[0128] In the present embodiment, the substrate 50 can be optical glass or optical plastic. The refractive index of the substrate 50 is similar to the material of the glass sheet of the laminated glass to which the substrate 50 is connected. The transmittance of the substrate 50 in the visible light band (380nm-780nm) is greater than or equal to 70%, and the substrate 50 has flatness, that is, the thickness of the central region of the substrate 50 is the same as that of the peripheral region. The thickness of the substrate 50 is generally less than or equal to 5.0mm. The material of the substrate 50 includes but is not limited to cyclo-olefin copolymer (COC), cyclo-olefin polymer (COP), polymethyl methacrylate (PMMA), polycarbonate (PC), polyetherimide (PEI), polystyrene (PS), styrene and acrylate copolymer (SAC) and poly(4-methylpentene-1) (PMP). For example, the substrate 50 can be a 0.3mm transparent glass layer, or the substrate 50 can be a 0.5mm COC layer.

[0129] The substrate 50 comprises a first surface 51 and a second surface 52. The first surface 51 and the second surface 52 are oppositely arranged along the thickness direction of the substrate 50. The plurality of nanocones 21 are arranged on the first surface 51 of the substrate 50. The substrate 50 is laminated to the fourth surface 132 of the laminated glass, and the second surface 52 of the substrate 50 faces the laminated glass. The substrate 50 covers the information acquisition area S1. It can be understood that the plurality of nanocones 21 are arranged on one side surface of the substrate 50, and the other side surface of the substrate 50 is connected to the surface of the laminated glass. The substrate 50 can be attached to the surface of the laminated glass, and is usually attached by using optical glue.

[0130] The plurality of nanocones 21 are arranged on the first surface 51 of the substrate 50, as shown in FIG. 1, which includes both the case that the plurality of nanocones 21 are directly arranged on the first surface 51 of the substrate 50 and the case that the plurality of nanocones 21 are etched on the first surface 51 of the substrate 50. Figure 14

[0131] When the plurality of nanocones 21 are directly arranged on the surface of the substrate 50, for the material of the nanocones 21, considering that reflection will occur at the interface of different media, the material of the plurality of nanocones 21 is preferably selected to be the same or similar to the refractive index of the substrate 50. For example, the refractive index of the substrate 50 is 1.52, and the material of the nanocones 21 can be selected to be ultraviolet fused quartz. The main component of the ultraviolet fused quartz is SiO2, and the refractive index of the ultraviolet fused quartz is 1.46.

[0132] It can be understood that the bending state of the substrate 50 is set according to the curvature state of the surface of the laminated glass to which the substrate 50 is attached, so that the substrate 50 has a higher attachment degree with the surface of the laminated glass, and the optical performance of the vehicle window glass 100 is better. By forming the nano-anti-reflection layer 20 on the substrate 50, the nano-anti-reflection layer 20 can be formed on the surface of the substrate 50, and then the substrate 50 together with the nano-anti-reflection layer 20 can be attached to the laminated glass. Compared with directly forming the nano-anti-reflection layer 20 on the surface of the laminated glass, the operation is more convenient, the process is simple, and the processing cost is saved.

[0133] Please refer to Figure 15 , the present application provides a third embodiment of the vehicle window glass 100. The difference between this embodiment and the first embodiment described above is that the vehicle window glass 100 further comprises a transition layer 60. The nano-anti-reflection layer 20 is indirectly connected to the laminated glass through the transition layer 60.

[0134] It should be noted that in this embodiment, only the case that the nano-anti-reflection layer 20 is connected to the fourth surface 132 of the laminated glass through the transition layer 60 is described as an example, and the case that the nano-anti-reflection layer 20 is connected to any other surface of the laminated glass through the transition layer 60 can be referred to.

[0135] ​In the embodiment, the transition layer 60 comprises a third surface 61 and a fourth surface 62. The third surface 61 and the fourth surface 62 are oppositely arranged along the thickness direction of the transition layer 60. The plurality of nanocones 21 are directly arranged on the third surface 61 of the transition layer 60. The transition layer 60 is laminated on the fourth surface 132 of the laminated glass, and the fourth surface 62 of the transition layer 60 faces the laminated glass. The transition layer 60 covers the information acquisition area S1. It can be understood that the plurality of nanocones 21 are arranged on one side surface of the transition layer 60, and the other side surface of the transition layer 60 is connected with the surface of the laminated glass.

[0136] It should be noted that the transition layer 60 is described as a whole in the embodiment. The transition layer 60 can be a single-layer structure or a multi-layer structure. The material of the transition layer 60 includes but is not limited to non-metallic oxide, metal oxide or metal, etc. For example, the transition layer 60 can be a coating structure in which high-refractive layers and low-refractive layers are alternately arranged, and the transition layer 60 has an anti-reflection effect. The high-refractive layer can be a metal oxide or a non-metallic oxide, such as Al2O3, and the low-refractive layer can be a metal oxide or a non-metallic oxide, such as SiO2.

[0137] It can be understood that, in general, the material of the plurality of nanocones 21 is preferably selected to be the same as the refractive index of the glass sheet on which the plurality of nanocones 21 are arranged. From the perspectives of the preparation process, production equipment, mechanical properties or chemical properties of the nano-anti-reflection layer 20 and the anti-reflection effect that can be achieved by the nano-anti-reflection layer 20, the material of the plurality of nanocones 21 can also be different from the material of the glass sheet on which the plurality of nanocones 21 are arranged. When the material of the plurality of nanocones 21 is different from the material of the glass sheet on which the plurality of nanocones 21 are arranged, the transition layer 60 arranged between the surface of the laminated glass and the nano-anti-reflection layer 20 can play a transition role between the nano-anti-reflection layer 20 and the surface of the laminated glass, improve the anti-reflection effect of the nano-anti-reflection layer 20, and further reduce the broadband reflectivity of the vehicle window glass 100 by combining the optical design of the nano-anti-reflection layer 20 and the transition layer 60.

[0138] Please refer to Figure 16 The fourth embodiment of the vehicle window glass 100 is provided in the present application. The difference between the fourth embodiment and the first embodiment described above is that the vehicle window glass 100 further comprises a base material 50 and a transition layer 60. The nano-anti-reflection layer 20 is indirectly connected with the laminated glass through the base material 50 and the transition layer 60.

[0139] It should be noted that, in the embodiment, only the case that the nano-anti-reflection layer 20 is connected with the fourth surface 132 of the laminated glass through the transition layer 60 and the base material 50 is described as an example, and the connection of the nano-anti-reflection layer 20 with any other surface of the laminated glass through the transition layer 60 and the base material 50 can be referred to.

[0140] In this embodiment, the structure and material of the substrate 50 can refer to the second embodiment. The structure and material of the transition layer 60 can refer to the third embodiment.

[0141] The substrate 50 is laminated to the fourth surface 132 of the laminated glass, and the second surface 52 of the substrate 50 faces the laminated glass. The substrate 50 covers the information collection area S1. The transition layer 60 is laminated to the first surface 51 of the substrate 50, and the fourth surface 62 of the transition layer 60 faces the substrate 50. The plurality of nanocones 21 is directly arranged on the third surface 61 of the transition layer 60. It can be understood that the plurality of nanocones 21 is arranged on one side surface of the transition layer 60, and the other side surface of the transition layer 60 is connected to one side surface of the substrate 50, and the other side surface of the substrate 50 is connected to the surface of the laminated glass.

[0142] It can be understood that, in general, the material of the plurality of nanocones 21 is preferably selected to be the same as the refractive index of the substrate 50 in which it is located. From the preparation process, production equipment, mechanical properties or chemical properties of the nano-antireflection layer 20, and the antireflection effect that can be achieved by the nano-antireflection layer 20, etc. from multiple angles, the material of the plurality of nanocones 21 can also be different from the material of the substrate 50 in which it is located. When the material of the plurality of nanocones 21 is different from the substrate 50 in which it is located, by arranging the transition layer 60 between the surface of the laminated glass and the nano-antireflection layer 20, the transition effect of the nano-antireflection layer 20 and the surface of the laminated glass can be achieved, and the antireflection effect of the nano-antireflection layer 20 can be improved. In addition, the optical design of the nano-antireflection layer 20 and the transition layer 60 can be combined to further reduce the broadband reflectivity of the vehicle window glass 100.

[0143] By using the nano-antireflection layer 20, the transition layer 60 and the substrate 50, the inner surface of the vehicle window glass 100 can have a surface reflectivity of 0.65% in the wavelength range of 400nm-2000nm. When the incident angle increases to 65°, the surface reflectivity of the inner surface of the vehicle window glass 100 can be controlled to be less than 1%.

[0144] Please refer to Figure 17 , Figure 18 and Figure 19 , the present application provides a fifth embodiment of the vehicle window glass 100. The difference between this embodiment and the first embodiment is that the vehicle window glass 100 comprises an optical compensation block 70.

[0145] With the evolution of intelligent driving, information collection device 200 is increasingly applied to vehicles, and the accuracy of obtaining images is increasingly required. Under normal circumstances, modulation transfer function (MTF) is used to analyze the resolution capability of information collection device 200 through vehicle window glass 100. Since the information collection area S1 of vehicle window glass 100 is in a curved state, the resolution capability of information collection device 200 is reduced. By setting optical compensation block 70 in information collection area S1 of vehicle window glass 100, the quality of MTF can be optimized.

[0146] In this embodiment, the material of optical compensation block 70 can be optical glass or optical plastic. The material of optical compensation block 70 includes but is not limited to cyclo-olefin copolymer (COC), cyclo-olefin polymer (COP), polymethyl methacrylate (PMMA), polycarbonate (PC), polyetherimide (PEI), polystyrene (PS), styrene and acrylic copolymer (SAC), and poly(4-methylpentene-1) (PMP).

[0147] In this embodiment, the thickness of optical compensation block 70 is not uniform. The maximum thickness of optical compensation block 70 is less than or equal to 6.0 mm. Preferably, the maximum thickness of optical compensation block 70 is less than or equal to 4.0 mm, or the maximum thickness of optical compensation block 70 is less than or equal to 2.0 mm, or the maximum thickness of optical compensation block 70 is less than or equal to 1.0 mm.

[0148] In this embodiment, optical compensation block 70 is connected to the surface of vehicle window glass 100 facing the inside of vehicle 1000. Along the thickness direction of vehicle window glass 100, optical compensation block 70 covers information collection area S1. Nano-anti-reflection layer 20 is laminated on the side surface of optical compensation block 70 facing the inside of vehicle 1000.

[0149] In the first possible implementation, as shown in Figure 17 , the laminated glass is a complete structure. The inner surface of vehicle window glass 100 is the surface of vehicle window glass 100 facing the inside of vehicle 1000. Optical compensation block 70 is connected to the inner surface of vehicle window glass 100. Nano-anti-reflection layer 20 is laminated on the side surface of optical compensation block 70 facing away from the inner surface of vehicle window glass 100.

[0150] In the second possible implementation, as shown inFigure 18 The intermediate layer 12 is provided with a first through groove 122. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two opposing surfaces of the intermediate layer 12. Along the thickness direction of the window glass 100, the orthographic projection of the first through groove 122 onto the second surface 112 of the outer glass panel 11 completely covers the information acquisition area S1. At this time, the inner surface of the window glass 100 is the surface of the window glass 100 facing the interior of the vehicle 1000.

[0151] The optical compensation block 70 is connected to the inner surface of the window glass 100. The nano-antireflective layer 20 is stacked on the side of the optical compensation block 70 facing away from the inner surface of the window glass 100.

[0152] In the second possible implementation, such as Figure 19 The laminated glass has a first through groove 122 and a second through groove 133. The first through groove 122 is located in the intermediate layer 12. Along the thickness direction of the laminated glass, the first through groove 122 penetrates the two opposing surfaces of the intermediate layer 12. The second through groove 133 is located in the inner glass plate 13. Along the thickness direction of the laminated glass, the second through groove 133 penetrates the third surface 131 and the fourth surface 132 of the inner glass plate 13. Along the thickness direction of the window glass 100, the orthographic projection of the first through groove 122 onto the second surface 112 of the outer glass plate 11 completely covers the information acquisition area S1, and the orthographic projection of the second through groove 133 onto the second surface 112 of the outer glass plate 11 completely covers the information acquisition area S1. The second through groove 133 is connected to the first through groove 122. At this time, the portion of the second surface 112 of the window glass 100 located within the first through groove 122 is the surface of the window glass 100 facing the interior of the vehicle 1000.

[0153] The optical compensation block 70 is located within the second through slot 133 and is connected to the second surface 112 of the outer glass plate 11. The nano-antireflection layer 20 is stacked on the side of the optical compensation block 70 facing away from the outer glass plate 11.

[0154] In a fourth possible implementation, the information acquisition area S1 of the window glass 100 has a wedge-shaped cross-section in the vertical direction. The optical compensation block 70 is connected to the inner surface of the window glass 100. The nano-antireflective layer 20 is stacked on the side of the optical compensation block 70 facing away from the inner surface of the window glass 100.

[0155] It should be noted that, in other embodiments, the nano-antireflective layer 20 may also be indirectly connected to the optical compensation block 70 through the substrate 50 and / or the transition layer 60.

[0156] It can be understood that, in the embodiment, the nano-anti-reflection layer 20 is adopted to weaken the secondary image and reduce the interference of the secondary image on the primary image, thereby improving the definition of the image collected by the information collection device 200. By arranging the optical compensation block 70 on the surface of the vehicle window glass 100 facing the inside of the vehicle 1000, the resolving power of the information collection device 200 is improved, and the definition of the image collected by the information collection device 200 is further improved.

[0157] Please refer to Figure 20 , Figure 21 and Figure 22 , the sixth embodiment of the vehicle window glass 100 is provided. The distinguishing feature of the embodiment from any of the above embodiments is that the vehicle 1000 further comprises a cover 80.

[0158] In the embodiment, the cover 80 is an annular column. The cover 80 comprises a first opening 81 and a second opening 82, and the first opening 81 and the second opening 82 are opposite and communicate with each other. The cover 80 is arranged on the laminated glass, the periphery of the first opening 81 is connected with the surface of the vehicle window glass 100 facing the inside of the vehicle 1000, and the periphery of the second opening 82 is connected with the shell 210 of the information collection device 200. The cover 80, the shell 210 and the vehicle window glass 100 form a containing cavity M. The lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M.

[0159] In a first possible implementation, as Figure 20 , the laminated glass is a complete structure. The cover 80 is arranged on the laminated glass. The periphery of the first opening 81 is connected with the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected with the shell 210 of the information collection device 200. The nano-anti-reflection layer 20 is arranged on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M.

[0160] In a second possible implementation, as Figure 21 , the intermediate layer 12 is provided with a first through groove 122. The first through groove 122 penetrates the two surfaces of the intermediate layer 12 arranged in the opposite direction along the thickness direction of the laminated glass. The first through groove 122 completely covers the information collection area S1 in the orthographic projection of the second surface 112 of the outer glass sheet 11 along the thickness direction of the vehicle window glass 100.

[0161] The cover 80 is arranged on the laminated glass, the periphery of the first opening 81 is connected with the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected with the shell 210 of the information collection device 200. The nano-anti-reflection layer 20 is arranged on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M.

[0162] In a third possible implementation, as Figure 22The laminated glass is provided with a first through groove 122 and a second through groove 133. The first through groove 122 is arranged in the interlayer 12. In the thickness direction of the laminated glass, the first through groove 122 penetrates through the two surfaces of the interlayer 12 arranged oppositely. The second through groove 133 is arranged in the inner glass sheet 13. In the thickness direction of the laminated glass, the second through groove 133 penetrates through the third surface 131 and the fourth surface 132 of the inner glass sheet 13. In the thickness direction of the vehicle window glass 100, the orthographic projection of the first through groove 122 on the second surface 112 of the outer glass sheet 11 completely covers the information collection area S1, the orthographic projection of the second through groove 133 on the second surface 112 of the outer glass sheet 11 completely covers the information collection area S1, and the second through groove 133 is in communication with the first through groove 122.

[0163] The cover 80 covers the laminated glass, the periphery of the first opening 81 is connected with the inner surface of the vehicle window glass 100, the periphery of the second opening 82 is connected with the shell 210 of the information collection device 200, and the cover 80, the shell 210 and the vehicle window glass 100 form a containing cavity M. The lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M. The nano-anti-reflection layer 20 is located in the first through groove 122, and the nano-anti-reflection layer 20 is arranged on the second surface 112 of the outer glass sheet 11. It can be understood that the lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M.

[0164] It should be noted that in the embodiment, the periphery of the first opening 81 of the cover 80 can also be connected with the part of the second surface 112 of the outer glass sheet 11 located in the first through groove 122, as long as the nano-anti-reflection layer 20 is located in the containing cavity M formed by the cover 80, the shell 210 of the information collection device 200 and the vehicle window glass 100.

[0165] In a fourth possible embodiment, the information collection area S1 of the vehicle window glass 100 has a wedge-shaped cross section in the vertical direction. The cover 80 covers the laminated glass, the periphery of the first opening 81 is connected with the inner surface of the vehicle window glass 100, and the periphery of the second opening 82 is connected with the shell 210 of the information collection device 200. The nano-anti-reflection layer 20 is arranged on the inner surface of the vehicle window glass 100. It can be understood that the lens assembly 220 and the nano-anti-reflection layer 20 are both located in the containing cavity M.

[0166] It should be noted that in other embodiments, the nano-anti-reflection layer 20 can also be indirectly formed on the surface of the vehicle window glass 100 facing the inside of the vehicle 1000 through the base material 50 and / or the transition layer 60.

[0167] It is understandable that by setting a cover 80 between the laminated glass and the information acquisition device 200, and by covering the nano-antireflection layer 20 with the cover 80, the stability and wear resistance of the nano-antireflection layer 20 can be improved, and the nano-cone 21 can be prevented from being easily damaged. In addition, it can also protect the nano-antireflection layer 20 from being contaminated by dust, oil stains, etc., which would lead to a decrease in the imaging quality of the information acquisition device 200.

[0168] This application provides a seventh embodiment of a vehicle window glass 100. The distinguishing feature of this embodiment compared to any other embodiment is that the information acquisition system 300 includes a visible light camera and a lidar.

[0169] In this embodiment, both the visible light camera and the lidar serve as information acquisition devices 200. Both the visible light camera and the lidar are located inside the vehicle 1000, and both face the vehicle window 100. The visible light camera and the lidar are arranged adjacent to each other. Both the visible light camera and the lidar acquire image data of the exterior of the vehicle 1000 through the information acquisition area S1. The data information of the exterior of the vehicle 1000 acquired by the visible light camera and the lidar can be mutually calibrated and fused, which is beneficial to improving the intelligent driving level of the vehicle 1000, and can also mitigate the impact of the harsh external environment on the accuracy of the visible light camera or the lidar. Compared to placing the lidar on the sheet metal of the vehicle body 400 located at the top of the vehicle window 100, placing the lidar on the inside of the vehicle window 100 can also improve the aesthetics of the vehicle 1000's design.

[0170] In this embodiment, since the information acquisition area S1 of the vehicle window glass 100 needs to simultaneously meet the transmittance requirements of the visible light camera for visible light (380nm~780nm) and the transmittance requirements of the lidar for near-infrared light (900nm~1700nm), the information acquisition area S1 of the vehicle window glass 100 needs to have high transmittance in both the visible light band and the near-infrared band.

[0171] The information acquisition area S1 of the vehicle window glass 100 has a transmittance TL for the near-infrared band (900nm~1700nm) incident at an incident angle of 65°. (900-1700) TL (900-1700) ≥80%, or TL (900-1700) ≥85%, or TL (900-1700) ≥90%. Specifically, at an incident angle of 65°, the near-infrared reflectance of the nano-antireflection layer 20 is less than or equal to 4.7%. Preferably, the near-infrared reflectance of the nano-antireflection layer 20 is less than or equal to 3.0%, and more preferably, the near-infrared reflectance of the nano-antireflection layer 20 is less than or equal to 1.0%.

[0172] It can be understood that by making the nano-anti-reflection layer 20 have low reflectivity in both the visible light band and the near-infrared band, the visible light camera and the laser camera can both obtain clear image data through the information acquisition area S1.

[0173] The above has introduced the embodiments of the present application in detail, and the principles and implementation manners of the present application have been described by applying specific examples; the above embodiment descriptions are only for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the field, according to the idea of the present application, the specific implementation manners and application ranges will have changes; in conclusion, the content of the present description should not be understood as the limitation of the present application.

Claims

1. A vehicle window glass for use in a vehicle, characterized by comprising: The vehicle window glass has an information collection area, the information collection area is provided with a nano anti-reflection layer, incident light passes through the information collection area and the nano anti-reflection layer to form first refracted light and second refracted light; a part of the incident light is refracted into the vehicle window glass; Wherein, the first refracted light is the light that is refracted into the interior of the vehicle for the first time and forms a main image, and the second refracted light is the light that is refracted into the interior of the vehicle for the second time after at least two reflections and forms a sub-image; The nano anti-reflection layer comprises a plurality of nano cones, and the plurality of nano cones are periodically arranged; When the incident angle θ of the incident light is 45°-75°, the ratio of the transmittance of the first refracted light to the transmittance of the second refracted light is a main-sub-image transmittance ratio Cr12, and Cr12≥1000.

2. The vehicle glazing of claim 1, wherein, The periodical distance P of the plurality of nano cones is ≤380nm.

3. The glazing according to claim 2, wherein, The ratio D / P of the diameter D of the plurality of nano cones to the periodical distance P of the plurality of nano cones is in the range of 0.8≤D / P≤1.

2.

4. The glazing according to claim 3, wherein, The height H of the plurality of nano cones is in the range of 200nm≤H≤500nm.

5. The glazing according to claim 4, wherein, The ratio H / D of the height H of the plurality of nano cones to the diameter D of the plurality of nano cones is ≤0.

5.

6. The vehicle glazing of claim 1, wherein, Cr12≥2000。 7. The glazing of claim 1, wherein, The vehicle window glass is a single piece of glass, the single piece of glass has an outer surface and an inner surface, and the nano anti-reflection layer is arranged on the outer surface and / or the inner surface.

8. The glazing of claim 1, wherein, The vehicle window glass is a laminated glass, the laminated glass comprises an outer glass sheet, an intermediate layer and an inner glass sheet, the outer glass sheet has opposite first and second surfaces, the inner glass sheet has opposite third and fourth surfaces, and the intermediate layer connects the second surface and the third surface; At least one of the first surface, the second surface, the third surface and the fourth surface is provided with the nano anti-reflection layer.

9. The glazing according to claim 8, characterized in that, The vehicle window glass further comprises a substrate, the substrate covers the information collection area, the nano anti-reflection layer is arranged on one side surface of the substrate, and the other side surface of the substrate is connected with the surface of the laminated glass.

10. The glazing according to claim 8 or 9, characterized in that, The vehicle window glass further comprises a transition layer, the transition layer covers the information collection area, the nano anti-reflection layer is arranged on one side surface of the transition layer, and the other side surface of the transition layer is connected with the surface of the laminated glass.

11. The vehicle glazing of claim 8, wherein, The intermediate layer is provided with a first through groove, the first through groove penetrates the intermediate layer along the thickness direction, and the orthographic projection of the first through groove on the second surface completely covers the information collection area along the thickness direction of the vehicle window glass.

12. The glazing according to claim 8 or 11, characterized in that, The inner glass sheet is provided with a second through groove, the second through groove penetrates the third surface and the fourth surface, and the orthographic projection of the second through groove on the second surface completely covers the information collection area along the thickness direction of the vehicle window glass; The first surface is provided with the nano anti-reflection layer; and / or, the second surface is provided with the nano anti-reflection layer, and the nano anti-reflection layer is located in the second through groove.

13. The glazing of claim 1, wherein, The information collection area has a transmittance TL for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65° (380-780) , TL (380-780) ≥ 60%.

14. The vehicle glazing of claim 1, wherein, The information collection area has a transmittance TL for near-infrared light with a wavelength of 900 nm to 1700 nm incident at an incident angle of 65° (900-1700) , TL (900-1700) ≥ 80%.

15. The window pane of claim 1, wherein, The vehicle window glass further comprises an optical compensation block connected with a surface of the vehicle window glass facing the interior of the vehicle, the optical compensation block covering the information collection area along the thickness direction of the vehicle window glass; The nano anti-reflection layer is arranged on a side surface of the optical compensation block facing the interior of the vehicle.

16. The glazing of claim 1, wherein, The central axes of the plurality of nano cones are parallel to the normal line of the vehicle window glass.

17. The window pane of claim 1, wherein, Cr12≥3000 。 18. The glazing of claim 1 wherein, Cr12≥5000。 19. The glazing of claim 1 wherein, Cr12≥8000。 20. The glazing of claim 1 wherein, Cr12≥10000。 21. The window pane of claim 1, wherein, Cr12≥20000。 22. The window pane of claim 1, wherein, Cr12≥50000。 23. The window pane of claim 1, wherein, The information collection area has a transmittance TL of 65% for visible light having a wavelength of 380 nm to 780 nm at an incident angle of 65° (380-780) , TL (380-780) ≥ 65%.

24. The window pane of claim 1, wherein, The information collection area has a transmittance TL for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65° (380-780) , TL (380-780) ≥ 70%.

25. The window pane of claim 1, wherein, The information collection area has a transmittance TL for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65° (380-780) , TL (380-780) ≥ 75%.

26. The window pane of claim 1, wherein, The information collection area has a transmittance TL for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65° (380-780) , TL (380-780) ≥ 80%.

27. The window pane of claim 1, wherein, The information collection area has a transmittance TL for visible light with a wavelength of 380 nm to 780 nm incident at an incident angle of 65° (380-780) , TL (380-780) ≥ 85%.

28. The window pane of claim 1, wherein, The information collection area has a transmittance TL for near-infrared light with a wavelength of 900 nm to 1700 nm incident at an incident angle of 65° (900-1700) , TL (900-1700) ≥ 85%.

29. The window pane of claim 1, wherein, The information collection area has a transmittance TL for near-infrared light with a wavelength of 900 nm to 1700 nm incident at an incident angle of 65° (900-1700) , TL (900-1700) ≥ 90%.

30. An information gathering system, comprising: An information collection device and a vehicle window glass according to any one of claims 1-29 are provided, the information collection device comprising a housing and a lens assembly accommodated in the housing; The information collection device is located in the interior of the vehicle, the housing is connected with the vehicle window glass, the lens assembly faces the vehicle window glass, and the first refracted light and the second refracted light enter the lens assembly.

31. The information gathering system of claim 30, wherein, An angle between a principal ray in a field of view angle range of the information collection device and the normal line of the vehicle window glass is α; The central axes of the plurality of nano cones are arranged to be inclined relative to the normal line of the vehicle window glass, the plurality of nano cones are inclined toward the lens assembly, an angle between the central axes of the plurality of nano cones and the normal line of the vehicle window glass is β, and the β and the α satisfy the following relationship: β = α / 2.

32. The information gathering system of claim 30, wherein, An angle between a principal ray in a field of view angle range of the information collection device and the normal line of the vehicle window glass is α; The central axes of the plurality of nano cones are arranged to be inclined relative to the normal line of the vehicle window glass, the plurality of nano cones are inclined toward the lens assembly, an angle between the central axes of the plurality of nano cones and the normal line of the vehicle window glass is β, and the β and the α satisfy the following relationship: α / 2-30° ≤ β ≤ α / 2+30°.

33. The information gathering system of claim 30, wherein, An angle between a principal ray in a field of view angle range of the information collection device and the normal line of the vehicle window glass is α; The central axes of the plurality of nano cones are arranged to be inclined relative to the normal line of the vehicle window glass, the plurality of nano cones are inclined toward the lens assembly, an angle between the central axes of the plurality of nano cones and the normal line of the vehicle window glass is β, and the β and the α satisfy the following relationship: α / 2-20° ≤ β ≤ α / 2+20°.

34. The information gathering system of claim 30, wherein, An angle between a principal ray in a field of view angle range of the information collection device and the normal line of the vehicle window glass is α; The central axes of the plurality of nano cones are arranged to be inclined relative to the normal line of the vehicle window glass, the plurality of nano cones are inclined toward the lens assembly, an angle between the central axes of the plurality of nano cones and the normal line of the vehicle window glass is β, and the β and the α satisfy the following relationship: α / 2-10° ≤ β ≤ α / 2+10°.

35. The information gathering system of any of claims 30-34, wherein, The nano anti-reflection layer is formed on a surface of the vehicle window glass facing the interior of the vehicle; The information collection system further comprises a cover, the cover comprising a first opening and a second opening, the first opening and the second opening being opposite and communicating. The cover is arranged on the vehicle window glass, a periphery of the first opening is connected with a surface of the vehicle window glass facing the vehicle interior, a periphery of the second opening is connected with the shell, the cover, the shell and the vehicle window glass form a containing cavity, and the lens assembly and the nano-anti-reflection layer are located in the containing cavity.

36. A vehicle characterized by A vehicle body and an information collection system as claimed in any one of claims 30 to 35, the information collection system being mounted to the vehicle body.

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