Vehicle glass and camera unit

Abstract

The present invention suppresses sound leakage while appropriately permitting transmission of far infrared rays. A vehicle glass (1) is provided with: a glass member (10) in which an opening (19) is formed that penetrates from a surface (10A) on the outside of the vehicle to a surface (10B) on the inside of the vehicle; a transmission member (20) that is disposed within the opening (19) and that allows the transmission of far infrared rays; and a cover section (30) that covers the surface (20b) of the transmission member (20) on the inside of the vehicle, the cover section (30) separating a first space (S1), which is located on the inside of the vehicle of the glass member (10) and which includes the surface (20b) of the transmission member (20) on the inside of the vehicle, from a space other than the first space (S1) of the glass member (10) on the inside of the vehicle.

Description

Technical Field

[0001] The present invention relates to vehicle glass and a camera unit. Background Art

[0002] In recent years, various sensors have been installed in cars to improve safety. Examples of sensors installed in cars include cameras, LiDAR (Light Detection and Ranging), millimeter-wave radars, and far-infrared cameras.

[0003] The window glass of a car usually does not allow far infrared rays with a wavelength of 8 μm to 13 μm to pass through. Therefore, for example, Patent Document 1 describes that an opening is formed in the glass for a vehicle, and a transmissive member that allows far infrared rays to pass through is provided in the opening. Thus, the far infrared rays that pass through the transmissive member can be detected by a far infrared camera.

[0004] Patent Document 1: International Publication No. 2021 / 182290 Summary of the invention

[0005] Problems to be solved by the invention

[0006] However, when an opening is formed in the glass and a transmissive member is provided, there is a possibility that sound leakage occurs from the portion where the transmissive member is provided. Therefore, it is required to suppress sound leakage while appropriately allowing far infrared rays to be transmitted.

[0007] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide vehicle glass and a camera unit that can suppress sound leakage while appropriately allowing far infrared rays to pass therethrough.

[0008] Means used to solve problems

[0009] In order to solve the above-mentioned problems and achieve the purpose, the vehicle glass disclosed in the present invention comprises: a glass component, the glass component being formed with an opening portion extending from a surface on the outside of the vehicle to a surface on the inside of the vehicle; a transmissive component, the transmissive component being arranged in the opening portion and allowing far-infrared rays to be transmitted; and a cover portion, the cover portion covering the surface on the inside of the vehicle of the transmissive component, the cover portion isolating a first space located on the inside of the vehicle of the glass component and including the surface on the inside of the vehicle of the transmissive component from a space other than the first space on the inside of the vehicle of the glass component.

[0010] In order to solve the above problems and achieve the purpose, the camera unit disclosed in the present invention comprises: the above-mentioned vehicle glass; and a far-infrared camera disposed in the first space.

[0011] Effects of the Invention

[0012] According to the present invention, sound leakage can be suppressed while appropriately allowing far infrared rays to be transmitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram which shows the state which mounted the vehicle glass of this embodiment on the vehicle.

[0014] Figure 2 It is a schematic plan view of the vehicle glass according to the present embodiment.

[0015] Figure 3A For along Figure 2 Cross-sectional view along line AA.

[0016] Figure 3B For along Figure 2 Cross-sectional view along line AA.

[0017] Figure 4 For along Figure 2 Cross-sectional view of the BB section.

[0018] Figure 5 It is a schematic cross-sectional view of the vehicle glass according to the present embodiment.

[0019] Figure 6 It is a schematic diagram of the first space when viewed from the Z direction.

[0020] Figure 7 This is a schematic diagram of the transmissive component when viewed from the outside of the vehicle in a vertical direction.

[0021] Figure 8 It is a figure which shows the evaluation result of each example. DETAILED DESCRIPTION

[0022] Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiment, and in addition, when there are multiple embodiments, it also includes a mode of combining the embodiments. In addition, regarding numerical values, the range of rounding is included.

[0023] (vehicle)

[0024] Figure 1 Schematic diagram showing a state where the vehicle glass of this embodiment is mounted on a vehicle. Figure 1 As shown, the vehicle glass 1 of the present embodiment is mounted on a vehicle V. The vehicle glass 1 is a window member applied to the front window glass of the vehicle V. That is, the vehicle glass 1 is used as the front window of the vehicle V, in other words, as a windshield. A far-infrared camera CA1 and a visible light camera CA2 are mounted inside (inside) the vehicle V. It should be noted that the inside (inside) of the vehicle V refers to, for example, the interior of the vehicle V where a driver's seat is provided. The vehicle glass 1 is not limited to being applied to the front window glass of the vehicle V, and can be mounted at any position of the vehicle V.

[0025] The vehicle glass 1, the far-infrared camera CA1 and the visible light camera CA2 constitute the camera unit 100 of the present embodiment. The far-infrared camera CA1 is a camera that detects far-infrared rays, and captures a thermal image of the outside of the vehicle V by detecting far-infrared rays from the outside of the vehicle V. The visible light camera CA2 is a camera that detects visible light, and captures an image of the outside of the vehicle V by detecting visible light from the outside of the vehicle V. It should be noted that the camera unit 100 may have at least the vehicle glass 1 and the far-infrared camera CA1. In addition, in addition to the far-infrared camera CA1 and the visible light camera CA2, the camera unit 100 may also have, for example, LiDAR and millimeter wave radar. Here, the far-infrared rays are, for example, electromagnetic waves in the wavelength band of 8μm to 13μm, and the visible light is, for example, electromagnetic waves in the wavelength band of 360nm to 830nm. It should be noted that the far-infrared rays can be defined as electromagnetic waves in the wavelength band of 8μm to 12μm. In addition, the numerical range represented by "~" refers to a range containing the numerical values ​​recorded before and after "~" as the lower limit and upper limit.

[0026] (Glass for vehicles)

[0027] Figure 2 It is a schematic plan view of the vehicle glass according to the present embodiment. Figure 3A and Figure 3B For along Figure 2 Cross-sectional view along line AA. Figure 3A This is a cross-sectional view of a case where the glass opening size on the vehicle exterior surface is larger than the opening size on the vehicle interior surface. Figure 3B This is a cross-sectional view of a case where the glass opening size on the inner surface of the vehicle is larger than the opening size on the outer surface of the vehicle. Figure 4 For along Figure 2 The sectional view of the BB section. Figure 2 As shown, hereinafter, the upper edge of the vehicle glass 1 is referred to as the upper edge 1a, the lower edge of the vehicle glass 1 is referred to as the lower edge 1b, one side edge of the vehicle glass 1 is referred to as the side edge 1c, and the other side edge of the vehicle glass 1 is referred to as the side edge 1d. The upper edge 1a is an edge portion located on the upper side in the vertical direction when the vehicle glass 1 is mounted on the vehicle V. The lower edge 1b is an edge portion located on the lower side in the vertical direction when the vehicle glass 1 is mounted on the vehicle V. The side edge 1c is an edge portion located on one side when the vehicle glass 1 is mounted on the vehicle V. The side edge 1d is an edge portion located on the other side when the vehicle glass 1 is mounted on the vehicle V.

[0028] Hereinafter, in the direction parallel to the surface of the vehicle glass 1, the direction from the upper edge 1a to the lower edge 1b is set as the Y direction, and the direction from the side edge 1c to the side edge 1d is set as the X direction. In the present embodiment, the X direction is orthogonal to the Y direction. The direction orthogonal to the surface of the vehicle glass 1, that is, the thickness direction of the vehicle glass 1 is set as the Z direction. The Z direction is, for example, the direction from the outer side of the vehicle V to the inner side of the vehicle V when the vehicle glass 1 is mounted on the vehicle V. The X direction and the Y direction are along the surface of the vehicle glass 1, but, for example, in the case where the surface of the vehicle glass 1 is a curved surface, the X direction and the Y direction may also be directions tangent to the surface of the vehicle glass 1 at the center point O of the vehicle glass 1. The center point O refers to the center position of the vehicle glass 1 when the vehicle glass 1 is observed from the Z direction.

[0029] A light-transmitting area A1 and a light-shielding area A2 are formed on the vehicle glass 1. The light-transmitting area A1 is an area occupying the central part of the vehicle glass 1 when viewed from the Z direction. The light-transmitting area A1 is an area for ensuring the driver's field of vision. The light-transmitting area A1 is an area that allows visible light to be transmitted. The light-shielding area A2 is an area formed around the light-transmitting area A1 when viewed from the Z direction. The light-shielding area A2 is an area that shields visible light. A far-infrared ray transmission area B and a visible light transmission area C are formed in the light-shielding area A2a that is a part of the upper edge 1a side of the light-shielding area A2.

[0030] The far infrared transmission area B is an area that allows far infrared transmission, and is an area where the far infrared camera CA1 is set. That is, the far infrared camera CA1 is set at a position that overlaps with the far infrared transmission area B when viewed from the optical axis direction of the far infrared camera CA1. The visible light transmission area C is an area that allows visible light transmission, and is an area where the visible light camera CA2 is set. That is, the visible light camera CA2 is set at a position that overlaps with the visible light transmission area C when viewed from the optical axis direction of the visible light camera CA2.

[0031] In this way, a far-infrared transmission area B and a visible light transmission area C are formed in the light-shielding area A2, so that the light-shielding area A2 shields far infrared rays in areas other than the areas where the far-infrared transmission area B is formed, and shields visible light in areas other than the areas where the visible light transmission area C is formed. The far-infrared transmission area B and the visible light transmission area C form a light-shielding area A2a around them. By providing the light-shielding area A2a around them, various sensors can be protected from sunlight, which is preferred. Since the wiring of various sensors cannot be seen from outside the vehicle, it is also preferred from the perspective of appearance design. However, the position where the far-infrared transmission area B is formed is not limited to within the light-shielding area A2, and can be any position.

[0032] like Figure 3A and Figure 3B As shown, the vehicle glass 1 includes a glass member 10. The glass member 10 includes a glass substrate 12 (first glass substrate), a glass substrate 14 (second glass substrate), an intermediate layer 16, and a light shielding layer 18. In the glass member 10, the glass substrate 12, the intermediate layer 16, the glass substrate 14, and the light shielding layer 18 are stacked in this order along the Z direction. The glass substrate 12 and the glass substrate 14 are fixed (bonded) to each other via the intermediate layer 16.

[0033] As the glass substrate 12 and the glass substrate 14, for example, soda-lime glass, borosilicate glass, aluminosilicate glass, etc. can be used. The intermediate layer 16 is a bonding layer that bonds the glass substrate 12 to the glass substrate 14. As the intermediate layer 16, for example, a polyvinyl butyral (hereinafter, also referred to as PVB) modified material, an ethylene-vinyl acetate copolymer (EVA)-based material, a urethane resin material, a vinyl chloride resin material, etc. can be used. In more detail, the glass substrate 12 includes a surface 12A and another surface 12B, and the other surface 12B is in contact with a surface 16A of the intermediate layer 16, thereby being fixed (bonded) to the intermediate layer 16. The glass substrate 14 includes a surface 14A and another surface 14B, and the one surface 14A is in contact with the other surface 16B of the intermediate layer 16, thereby being fixed (bonded) to the intermediate layer 16. In this way, the glass member 10 is a laminated glass in which the glass substrate 12 and the glass substrate 14 are stacked. However, the glass member 10 is not limited to laminated glass, and may be, for example, a structure including only one of the glass base body 12 and the glass base body 14. In this case, the intermediate layer 16 may not be provided.

[0034] The light-shielding layer 18 includes a surface 18A and another surface 18B, and the surface 18A is fixed to the other surface 14B of the glass substrate 14 by contacting. The light-shielding layer 18 is a layer that shields visible light, preferably a layer that shields visible light and ultraviolet light. As the light-shielding layer 18, for example, a ceramic light-shielding layer or a light-shielding film can be used. As the ceramic light-shielding layer, for example, a ceramic layer including a conventionally known material such as a black ceramic layer can be used. As the light-shielding film, for example, a light-shielding polyethylene terephthalate (PET) film, a light-shielding polyethylene naphthalate (PEN) film, a light-shielding polymethyl methacrylate (PMMA) film, etc. can be used.

[0035] In the present embodiment, the side of the glass member 10 where the light shielding layer 18 is provided is the inner side (inside the vehicle) of the vehicle V, and the side of the glass member 10 where the glass substrate 12 is provided is the outer side (outside the vehicle) of the vehicle V, but the present invention is not limited thereto, and the light shielding layer 18 may also be the outer side of the vehicle V. In the case of laminated glass composed of the glass substrate 12 and the glass substrate 14 , the light shielding layer 18 may also be formed between the glass substrate 12 and the glass substrate 14 .

[0036] (Light-shielded area)

[0037] The light-shielding region A2 is formed by providing the light-shielding layer 18 on the glass member 10. That is, the light-shielding region A2 is a region where the glass member 10 has the light-shielding layer 18. That is, the light-shielding region A2 is a region where the glass base 12, the intermediate layer 16, the glass base 14, and the light-shielding layer 18 are stacked. On the other hand, the light-transmitting region A1 is a region where the glass member 10 does not have the light-shielding layer 18. That is, the light-transmitting region A1 is a region where the glass base 12, the intermediate layer 16, and the glass base 14 are stacked but the light-shielding layer 18 is not stacked.

[0038] (Far infrared transmission area)

[0039] As shown in FIG. 3 , the glass member 10 is formed with an opening 19 that penetrates from one surface (here, the surface 12A) to the other surface (here, the surface 14B) in the Z direction. A transmissive member 20 that allows far infrared rays to be transmitted is provided in the opening 19. The region where the opening 19 is formed and the transmissive member 20 is provided is a far infrared ray transmissive region B. That is, the far infrared ray transmissive region B is a region where the opening 19 and the transmissive member 20 disposed in the opening 19 are provided. Since the light shielding layer 18 does not allow far infrared rays to be transmitted, the light shielding layer 18 is not provided in the far infrared ray transmissive region B. That is, in the far infrared ray transmissive region B, the glass substrate 12, the intermediate layer 16, the glass substrate 14, and the light shielding layer 18 are not provided, but the transmissive member 20 is provided in the formed opening 19. The transmissive member 20 will be described later. It should be noted that the vehicle glass 1 can be said to include the glass member 10 and the transmissive member 20 provided in the opening 19 of the glass member 10. The glass member 10 can also be referred to as a part constituting the window glass in the vehicle glass 1. For example, the structure including the glass substrate 12, the glass substrate 14, the intermediate layer 16, and the light shielding layer 18 can be referred to as the glass member 10. However, as described above, the glass member 10 may include at least only one of the glass substrate 12 and the glass substrate 14.

[0040] (Visible light region)

[0041] like Figure 4 As shown, like the light-transmitting region A1, the visible light-transmitting region C is a region where the glass member 10 does not have the light-shielding layer 18 in the Z direction. That is, the visible light-transmitting region C is a region where the glass base 12, the intermediate layer 16, and the glass base 14 are stacked but the light-shielding layer 18 is not stacked.

[0042] like Figure 2As shown, the visible light transmission area C is preferably arranged near the far infrared transmission area B. Specifically, the center of the far infrared transmission area B when observed from the Z direction is set as the center point OB, and the center of the visible light transmission area C when observed from the Z direction is set as the center point OC. When the shortest distance between the far infrared transmission area B (opening 19) and the visible light transmission area C when observed from the Z direction is set as the distance L, the distance L is preferably greater than 0 mm and less than or equal to 100 mm, and more preferably greater than 10 mm and less than 80 mm. Although not shown here, in the case where there are multiple visible light transmission areas C, the relationship with one of the visible light transmission areas C is indicated. By positioning the visible light transmission area C relative to the far infrared transmission area B in this range, it is possible to capture images of close positions using the far infrared camera CA1 and the visible light camera CA2, and at the same time, the perspective distortion amount in the visible light transmission area C can be suppressed, so that the image can be appropriately captured using the visible light camera CA2. By capturing images of nearby locations using the far-infrared camera CA1 and the visible light camera CA2 , it is possible to reduce the load on the calculation of data obtained from each camera, and to facilitate the wiring of power and signal cables.

[0043] like Figure 2 As shown, the visible light transmission area C and the far infrared transmission area B are preferably arranged in the X direction. That is, the visible light transmission area C is preferably arranged in the X direction with the far infrared transmission area B, and is not located on the Y direction side of the far infrared transmission area B. By arranging the visible light transmission area C in the X direction with the far infrared transmission area B, the parallax between the far infrared camera and the visible light camera can be minimized, the object recognition rate of the object can be improved, and the visible light transmission area C can be arranged near the upper edge 1a. Therefore, the field of vision of the driver in the light transmission area A1 can be properly ensured. It should be noted that the arrangement in the X direction here means being within the range of ±50mm relative to the Y direction.

[0044] (Composition of vehicle glass)

[0045] Figure 5 FIG. 2 is a schematic cross-sectional view of the vehicle glass according to the present embodiment. Figure 5 As shown, the vehicle glass 1 of this embodiment includes a cover 30, a protective member 40, a camera mounting portion 50, and a sound absorbing material 60 in addition to the glass member 10 and the transmission member 20. It should be noted that the far-infrared camera CA1 may be regarded as a member included in the vehicle glass 1 or as a member separate from the vehicle glass 1. In addition, for example, the far-infrared camera CA1 and the vehicle glass 1 may constitute a camera unit 100 mounted on the vehicle glass 1 (glass member 10).

[0046] (Installation position of glass components)

[0047] like Figure 5 As shown in FIG. 1 , the glass member 10 is mounted on the vehicle V in a manner inclined relative to the vertical direction. Therefore, when the direction along the vertically downward direction is defined as direction YV, the direction Y of the glass member 10 in the state of being mounted on the vehicle V is inclined relative to the direction YV, and the surface 20a of the vehicle outer side of the transmissive member 20 is also inclined relative to the direction YV. In addition, when the direction from the front of the vehicle V to the rear of the vehicle V is defined as direction ZV as a horizontal direction, the direction Z of the glass member 10 in the state of being mounted on the vehicle V is inclined relative to the direction ZV, and the vertical line AX orthogonal to the surface 20a of the transmissive member 20 is also inclined relative to the direction ZV. However, the glass member 10 is not limited to being mounted on the vehicle V in a manner inclined relative to the vertical direction. For example, the direction Y of the glass member 10 in the state of being mounted on the vehicle V and the surface 20a of the transmissive member 20 may be along the direction YV, and the direction Z of the glass member 10 in the state of being mounted on the vehicle V and the vertical line AX may be along the direction ZV. It should be noted that, unless otherwise specified, the following description is made of the state where the glass member 10 is mounted on the vehicle V.

[0048] (Installation location of far-infrared camera)

[0049] The far-infrared camera CA1 is arranged in the vehicle V. The far-infrared camera CA1 is arranged on the vehicle interior side of the transmissive component 20 of the vehicle glass 1, that is, on the ZV side (the Z side) of the transmissive component 20. The far-infrared camera CA1 is arranged in such a way that its optical axis AXR passes through the transmissive component 20. Further, the far-infrared camera CA1 is arranged in such a way that its detection range R passes through the transmissive component 20. The detection range R refers to the range (shooting range) that the far-infrared camera CA1 can detect, and it can be said that the far-infrared camera CA1 receives and detects the far-infrared rays incident through the detection range R. It should be noted that the detection range R can be said to be a space that expands with the optical axis AXR as the center at a specified field of view angle as it moves away from the far-infrared camera CA1. The size and field of view of the detection range R can be appropriately set according to the distance and range that you want to detect with the far-infrared camera.

[0050] In addition, in the present embodiment, the optical axis AXR of the far-infrared camera CA1 is inclined relative to the vertical line AX of the transmission member 20. That is, the optical axis AXR of the far-infrared camera CA1 is not along the surface 20a of the transmission member 20, and is not orthogonal to the surface 20a of the transmission member 20. For example, the angle formed by the optical axis AXR and the direction ZV may be smaller than the angle formed by the vertical line AX of the transmission member 20 and the direction ZV. However, the relationship between the optical axis AXR and the vertical line AX is not limited to this. For example, the far-infrared camera CA1 may also be arranged in a manner such that its optical axis AXR is along the vertical line AX of the transmission member 20.

[0051] (Transmission component)

[0052] Hereinafter, the transmissive member 20 disposed in the far infrared ray transmissive region B will be specifically described. The transmissive member 20 is a member that allows far infrared rays to be transmitted. Figure 3A and Figure 3B As shown, the transmissive member 20 is preferably formed in such a manner that its vehicle-outside surface is flush with (continuous with) the vehicle-outside surface of the light-shielding area A2. In other words, the vehicle-outside surface 20a of the transmissive member 20 is preferably attached in such a manner as to be continuous with the surface 12A of the glass substrate 12. In this way, the surface 20a of the transmissive member 20 is continuous with the surface 12A of the glass substrate 12, thereby preventing the wiping effect of the wiper from being impaired. In addition, the possibility of damaging the design of the vehicle V due to the height difference, and the accumulation of dust and the like at the height difference can be suppressed. In addition, the transmissive member 20 is preferably molded in such a manner as to match the curved surface shape of the vehicle glass 1 to which it is applied. There is no particular limitation on the molding method of the transmissive member 20, and grinding or mold molding is selected according to the curved surface shape and the member.

[0053] The shape of the transmissive member 20 is not particularly limited, and is preferably a plate-like shape that matches the shape of the opening 19. That is, for example, when the opening 19 is circular, the transmissive member 20 is preferably in the shape of a disk (cylindrical). In addition, from the perspective of appearance design, the surface shape of the transmissive member 20 on the outside of the vehicle can also be processed to be consistent with the curvature of the outer surface shape of the glass substrate 12. In addition, from the perspective of simultaneously achieving a wide angle of view of the far-infrared camera CA1 and improving mechanical properties, the transmissive member 20 can also be made into a lens shape. When such a structure is adopted, even if the area of ​​the transmissive member 20 is small, it can effectively converge far-infrared light, so it is preferred. In this case, the number of lens-shaped transmissive members 20 is preferably 1 to 3, and typically preferably 2. In addition, it is particularly preferred that the lens-shaped transmissive member 20 is pre-aligned and made into a module, and integrated with a shell or bracket that joins the far-infrared camera CA1 to the vehicle glass 1.

[0054] In the vehicle glass 1 of the present embodiment, as one configuration example of the opening 19, it is preferable to have Figure 3A As shown, a configuration is adopted in which the area of ​​the opening 19 on the surface on the vehicle inner side is smaller than the area of ​​the opening 19 on the surface on the vehicle outer side. By adopting such a configuration, the strength against the impact from the vehicle outer side is improved. In this case, the shape of the transmissive member 20 can match the opening 19 on the vehicle outer side. Further, in the case where the glass member 10 of the present embodiment is a laminated glass having a glass substrate 12 (vehicle outer side) and a glass substrate 14 (vehicle inner side), the opening 19 is formed by overlapping the opening 12a of the glass substrate 12 and the opening 14a of the glass substrate 14. In this case, the area of ​​the opening 12a of the glass substrate 12 is made larger than the area of ​​the opening 14a of the glass substrate 14, and the transmissive member 20 matching the size of the opening 12a of the glass substrate 12 is arranged in the opening 12a of the glass substrate 12. Figure 3A The structure can be realized by, for example, processing the positions and sizes of the openings 12a of the glass substrate 12 and the openings 14a of the glass substrate 14 with high precision and laminating them in a manner that reduces positional deviation.

[0055] As an example of the opening 19, Figure 3B and Figure 5 As shown in FIG. 1 , the area of ​​the opening 19 on the surface on the vehicle outer side is smaller than the area of ​​the opening 19 on the surface on the vehicle inner side. In this case, the shape of the transmissive member 20 may match the opening 19 on the vehicle outer side. Further, when the vehicle glass 1 of the present embodiment is a laminated glass including a glass substrate 12 (on the vehicle outer side) and a glass substrate 14 (on the vehicle inner side), the opening 19 is formed by overlapping the opening 12a of the glass substrate 12 and the opening 14a of the glass substrate 14. In this case, the area of ​​the opening 14a of the glass substrate 14 is made larger than the area of ​​the opening 12a of the glass substrate 12, and the transmissive member 20 matching the size of the opening 12a of the glass substrate 12 is arranged in the opening 12a of the glass substrate 12. In such a configuration, the center axis offset of the opening 12 a formed on the glass substrate 12 and the opening 14 a formed on the glass substrate 14 from the rotation axis of the glass surface (for convenience, the center position offset) is as small as possible, which is preferable in terms of being able to reduce the outer peripheral width of the frame member 52 described later, forming a satisfactory appearance, and increasing the area of ​​the opening 19 of the transmissive member 20.

[0056] In addition, if Figure 3A and Figure 3BAs shown, the length D1 of the longest straight line among the straight lines connecting any two points in the surface of the vehicle outer side of the transparent member 20 is preferably 100 mm or less. More preferably, it is 80 mm or less. The length D1 is further preferably 60 mm or less, and particularly preferably 55 mm or less. In addition, the length D1 is preferably 45 mm or more. It can be said that the length D1 is preferably 45 mm or more and 100 mm or less, more preferably 45 mm or more and 80 mm or less, more preferably 45 mm or more and 60 mm or less, and more preferably 45 mm or more and 55 mm or less. In addition, as Figure 3A As shown, the length D2 of the longest straight line among the straight lines connecting any two points in the surface of the opening 19 on the vehicle outer side of the far infrared transmission area B (here, any two points on the edge of the portion where the opening 19 opens on the surface 12A side) is preferably 110 mm or less. The length D2 is more preferably 85 mm or less, further preferably 65 mm or less, and particularly preferably 60 mm or less. In addition, the length D2 is preferably 50 mm or more. It can be said that the length D2 is preferably 50 mm or more and 110 mm or less, more preferably 50 mm or more and 85 mm or less, more preferably 50 mm or more and 65 mm or less, and more preferably 50 mm or more and 60 mm or less. The length D2 can also be said to be the length of the longest straight line among the straight lines connecting any two points on the outer periphery of the opening 19 in the surface (surface 12A) on the vehicle outer side of the vehicle glass 1. By setting the length D1 of the transmission member 20 and the length D2 of the opening 19 within this range, the strength reduction of the vehicle glass 1 can be suppressed, and the perspective distortion amount around the opening 19 can also be suppressed. It should be noted that, when the shape of the surface on the vehicle outer side of the transparent member 20 is circular, the lengths D1 and D2 are lengths corresponding to the diameter of the surface on the vehicle outer side. In addition, the lengths D1 and D2 herein refer to the lengths in a state where the vehicle glass 1 is mounted on the vehicle V. For example, when the glass is bent to form a shape to be mounted on the vehicle V, the lengths D1 and D2 are the lengths in the state after the bending process. The description of the dimensions and positions other than the lengths D1 and D2 is the same unless otherwise specified.

[0057] The transmissive member 20 includes a substrate 22, which is a member that allows far-infrared rays to be transmitted. The internal transmittance of the substrate 22 to light (far-infrared rays) with a wavelength of 10 μm is preferably 50% or more, more preferably 60% or more, and further preferably 70% or more. In addition, the average internal transmittance of the substrate 22 to light (far-infrared rays) with a wavelength of 8 μm to 13 μm is preferably 50% or more, more preferably 60% or more, and further preferably 70% or more. By making the internal transmittance of the substrate 22 at 10 μm and the average internal transmittance in the range of 8 μm to 13 μm within this numerical range, far-infrared rays can be appropriately allowed to be transmitted, so that, for example, the performance of the far-infrared camera CA1 can be fully utilized. It should be noted that the average internal transmittance here refers to the average value of the internal transmittance of light of each wavelength in the band (here 8 μm to 12 μm).

[0058] The internal transmittance of the substrate 22 is the transmittance after deducting the surface reflection losses on the incident side and the outgoing side, and is well known in the art, and can be measured by a commonly performed method. The measurement is performed, for example, as follows.

[0059] A pair of flat-plate samples (a first sample and a second sample) having the same composition and different thicknesses are prepared. The two surfaces of the flat-plate samples are parallel to each other and optically polished planes. The external transmittance of the first sample including surface reflection loss is set to T1, the external transmittance of the second sample including surface reflection loss is set to T2, the thickness of the first sample is set to Td1 (mm), and the thickness of the second sample is set to Td2 (mm), where Td1 < Td2. In this case, the internal transmittance τ at the thickness Tdx (mm) can be calculated by the following formula (1).

[0060] τ=exp[-Tdx×(lnT1-lnT2) / ΔTd]……(1)

[0061] It should be noted that the external transmittance of infrared light can be measured, for example, by a Fourier transform infrared spectrometer (manufactured by ThermoScientific, trade name: Nicolet iS10).

[0062] The refractive index of the substrate 22 for light with a wavelength of 10 μm is preferably 1.5 or more and 4.0 or less, more preferably 2.0 or more and 4.0 or less, and further preferably 2.2 or more and 3.5 or less. When the refractive index of the substrate 22 is within this numerical range, far-infrared light can be appropriately allowed to pass through, so that, for example, the performance of the far-infrared camera CA1 can be fully utilized. The refractive index can be determined, for example, by fitting an optical model using polarization information obtained by an infrared spectroscopic ellipsometer (manufactured by JA Woollam, IR-VASE-UT) and a spectral transmission spectrum obtained by a Fourier transform infrared spectrometer.

[0063] The thickness D0 of the substrate 22 is preferably 1.5 mm to 5 mm, more preferably 1.7 mm to 4 mm, and further preferably 1.8 mm to 3 mm. When the thickness D0 is within this range, far infrared rays can be appropriately allowed to pass through while ensuring strength.

[0064] The material of the substrate 22 is not particularly limited, and examples thereof include Si, Ge, ZnS, and chalcogenide glass. It can be said that the substrate 22 preferably includes at least one material selected from the group consisting of Si, Ge, ZnS, and chalcogenide glass. By using such a material for the substrate 22, it is possible to appropriately allow far infrared rays to be transmitted.

[0065] As a preferred composition of chalcogenide glass,

[0066] In terms of atomic %, the composition contains:

[0067] Ge+Ga: 7%~25%,

[0068] Sb: 0%~35%,

[0069] Bi: 0%~20%,

[0070] Zn: 0%~20%,

[0071] Sn: 0%~20%,

[0072] Si: 0%~20%,

[0073] La: 0%~20%,

[0074] S+Se+Te:55%~80%

[0075] Ti: 0.005%~0.3%,

[0076] Li+Na+K+Cs: 0%~20%,

[0077] F+Cl+Br+I:0%~20%.

[0078] Furthermore, the glass preferably has a glass transition temperature (Tg) of 140°C to 550°C.

[0079] It should be noted that as the material of the substrate 22 , it is more preferable to use Si or ZnS.

[0080] In addition, the transmissive member 20 may be provided with a frame member (not shown) on the outer periphery and attached to the opening 19 via the frame member.

[0081] (Hood)

[0082] The cover 30 is a cover that is provided in the vehicle V and covers the surface 20b of the transmissive member 20 on the vehicle interior side. The cover 30 is attached to the surface 10B of the glass member 10 on the vehicle interior side so as to cover the surface 20b of the transmissive member 20. Here, the space in the vehicle covered by the cover 30 (the space in the cover 30) is referred to as the first space S1. The first space S1 can also be said to be a space surrounded by the inner surface of the cover 30 (in the example of the present embodiment, the inner surface 32A of the housing 32 described later), the surface 10B of the glass member 10 on the vehicle interior side, and the surface 20b of the transmissive member 20 on the vehicle interior side. It can be said that the surface 20b of the transmissive member 20 is included in the first space S1. In the present embodiment, the protective member 40, the camera mounting portion 50, the far-infrared camera CA1 fixed to the camera mounting portion 50, and the sound absorbing material 60 are provided in the first space S1.

[0083] The cover 30 isolates the first space S1 from the second space S2 (the space other than the first space S1 on the vehicle interior side) in the space inside the vehicle that is not covered by the cover 30. The isolation here means that the cover 30 covers the first space S1 without a gap. For example, when air is supplied to the first space S1 in such a manner that the first space S1 is 1 atmosphere higher than the second space S2, when the pressure difference between the first space S1 and the second space S2 reaches 0.9 atmospheres or more, it can be determined that the cover 30 isolates the first space S1 from the second space S2.

[0084] By isolating the first space S1 with the cover portion 30 , it is possible to appropriately suppress sound leakage to the vehicle interior caused by forming the opening portion 19 in the glass member 10 .

[0085] (case)

[0086] In this embodiment, the cover 30 preferably includes a housing 32 and a fixing portion 34. The housing 32 is a cover covering the first space S1. The housing 32 is mounted on the glass member 10 with one surface side open and the open side facing the surface 10B of the glass member 10 on the vehicle interior side.

[0087] In this embodiment, a take-out port 32a is formed on the shell 32, and the take-out port 32a is an opening for passing the wiring W of the far-infrared camera CA1. The take-out port 32a is an opening that passes through the inner surface 32A of the shell 32 to the outer surface 32B of the shell 32. The wiring W extends from the far-infrared camera CA1 in the first space S1 through the take-out port 32a to the outside of the first space S1 (in the second space S2). Figure 5 In the example of FIG. 3 , the outlet 32a is formed near the outer peripheral edge of the opening side of the housing 32, but the position where the outlet 32a is formed may be any position. In addition, the outlet 32a is not necessarily a necessary structure. For example, when the far-infrared camera CA1 is not provided with wiring, the outlet 32a may not be formed.

[0088] The housing 32 may be made of any material, and may be, for example, a resin member that does not allow visible light to pass therethrough. This can prevent passengers of the vehicle V from visually recognizing the far-infrared camera CA1 and the like.

[0089] (Fixed part)

[0090] Figure 6 The fixing portion 34 is a member for fixing the housing 32 to the surface 10B of the glass member 10. Figure 6 As shown, the fixing portion 34 is a frame-shaped member surrounding the outer periphery of the first space S1 (the surface 20b of the transmissive member 20) when viewed from the Z direction. The fixing portion 34 is preferably shaped to extend uninterruptedly over the entire outer periphery of the first space S1 (the surface 20b of the transmissive member 20) when viewed from the Z direction.

[0091] like Figure 5 As shown, the fixing portion 34 closes the gap G formed between the surface 10B of the glass member 10 and the outer peripheral edge of the housing 32. Figure 5 In the example of , the fixing portion 34 is located between the glass member 10 and the housing 32 in the Z direction, thereby closing the gap G. The surface 34a of the fixing portion 34 on the vehicle outer side (the side opposite to the Z direction) is fixed to the surface 10B of the glass member 10 while contacting the surface 10B of the glass member 10. In addition, the surface 34b of the fixing portion 34 on the vehicle inner side (the side in the Z direction) is fixed to the outer periphery of the housing 32 while contacting the outer periphery of the housing 32. However, the shape of the fixing portion 34 is not limited thereto, and may be any shape that closes the gap G between the glass member 10 and the housing 32. For example, it may be a fixing portion that is arranged to surround the outer periphery of the housing 32 when viewed from the Z direction, thereby closing the gap G.

[0092] The fixing portion 34 may be made of any material, such as rubber or adhesive.

[0093] In addition, when the outlet 32a is formed in the cover part 30, it is preferable to further provide a sealing part 36 for sealing the outlet 32a. Since the wiring W passes through the outlet 32a, the sealing part 36 is provided to seal the area of ​​the outlet 32a except the area occupied by the wiring W. The material of the sealing part 36 is any material, for example, it can be rubber or an adhesive.

[0094] It should be noted that the cover portion 30 can accommodate not only the far-infrared camera CA1 but also the visible light camera CA2 and other devices.

[0095] Furthermore, in order to provide anti-fogging and snow-melting functions to the surfaces of the glass member 10 and the transmissive member 20 on the vehicle interior side, a heater or the like may be provided in the cover portion 30 .

[0096] (Protective components)

[0097] Figure 7 This is a schematic diagram of the transmission component when viewed from the outside of the vehicle along the vertical direction. Figure 5 As shown in FIG. 1 , the protective member 40 is disposed in the first space S1. The protective member 40 is disposed on the vehicle interior side (the side in the direction ZV) of the transmissive member 20. Figure 7 As shown in FIG. 1 , when viewed from the direction along the vertical line AX (a direction perpendicular to the surface 20a of the transmissive member 20), the protective member 40 overlaps at least a portion of the transmissive member 20. In other words, when viewed from the direction along the vertical line AX, at least a portion of the protective member 40 overlaps at least a portion of the transmissive member 20. Thus, even if a collision object passes through the transmissive member 20, the collision object can be blocked by the protective member 40, thereby preventing the collision object from reaching the driver's seat side. In addition, as shown in FIG. Figure 5 As shown, in this embodiment, the protection member 40 is preferably disposed on the vehicle outer side (the side opposite to the direction ZV) of the far-infrared camera CA1, and is disposed at a position that does not overlap with the detection range R of the far-infrared camera CA1. That is, the protection member 40 preferably does not interfere with the detection range R, and is located outside the detection range R. Thus, it is possible to prevent the far-infrared rays incident on the far-infrared camera CA1 from being blocked by the protection member 40, thereby preventing the detection accuracy of the far-infrared rays from being reduced.

[0098] In more detail, the protection member 40 includes a surface portion 42, a protruding portion 44, and a fixing portion 46. Figure 7As shown in FIG. 1 , when viewed from the direction along the vertical line AX, the surface portion 42 is provided at a position overlapping with at least a portion of the transmissive member 20. When viewed from the direction along the vertical line AX, the surface portion 42 preferably overlaps with a region of 30% or more of the area of ​​the entire region of the transmissive member 20. In other words, when the region of the entire region of the transmissive member 20 that overlaps with the surface portion 42 when viewed from the direction along the vertical line AX is regarded as the overlapping region, the area of ​​the overlapping region is preferably 30% or more relative to the area of ​​the entire region of the transmissive member 20. If the area of ​​the overlapping region is 30% or more relative to the area of ​​the entire region of the transmissive member 20, even when the collision object penetrates the transmissive member 20, the collision energy can be fully absorbed by the protective member. In addition, the area of ​​the overlapping region is more preferably 35% or more relative to the area of ​​the entire region of the transmissive member 20, and further preferably 40% or more. On the other hand, the area of ​​the overlapping region is preferably less than 90% relative to the area of ​​the entire region of the transmissive member 20. If the area of ​​the overlapping region is less than 90% relative to the area of ​​the entire region of the transmissive member 20, the protective member 40 does not interfere with the detection range R. In addition, the area of ​​the overlapping region is more preferably 85% or less, and further preferably 80% or less relative to the area of ​​the entire area of ​​the transmissive member 20. When the area of ​​the overlapping region is within this range, it is possible to appropriately suppress the collision object that penetrates the transmissive member 20 from reaching the driver's seat. It should be noted that, for the purpose of weight reduction, the protective member 40 may be subjected to mesh processing or punching processing. In other words, an opening may be formed in the surface portion 42 of the protective member 40. When an opening is formed in the surface portion 42 of the protective member 40, the area of ​​the opening is also included in the area of ​​the overlapping region of the protective member 40. In other words, in the entire area of ​​the transmissive member 20, the area that overlaps with the portion of the surface portion 42 where no opening is formed and the area that overlaps with the portion of the surface portion 42 where an opening is formed (in other words, in the entire area of ​​the transmissive member 20, the area that overlaps with the area surrounded by the periphery of the protective member 40) is the overlapping region. It should be noted that, when an opening is formed in the surface portion 42 of the protective member 40, the area of ​​each opening is preferably φ10 mm or less in terms of diameter. If the area of ​​the opening is φ10 mm or less, the function as a protective member will not be impaired even when flying stones or the like collide with the transmissive member 20. The area of ​​the opening is preferably φ8 mm or less, and more preferably φ5 mm or less. It should be noted that, for example, the area converted to φ10 mm or less in terms of diameter means that the area is less than the area of ​​a circle with a diameter of 10 mm.

[0099] The surface portion 42 is provided at a position that does not overlap with the detection range R of the far-infrared camera CA1. In the example of the present embodiment, the surface portion 42 is located on the YV side (the side below in the vertical direction) of the detection range R. In other words, it can be said that the surface portion 42 is located below in the vertical direction of the far-infrared camera CA1. That is, in the present embodiment, it can be said that the surface portion 42 is located on the YV side (the side below in the vertical direction) of the far-infrared camera CA1 and on the outside of the vehicle (the side opposite to the direction ZV).

[0100] The surface portion 42 is a plate-like member extending from the end portion 42B to the end portion 42A. In the present embodiment, the surface portion 42 is planar. The end portion 42B is the end portion of the surface portion 42 on the side of the direction ZV (the outside of the vehicle), and the end portion 42A is the end portion of the surface portion 42 on the side opposite to the direction ZV (the inside of the vehicle). In addition, it can be said that the end portion 42B is the end portion of the surface portion 42 on the side away from the far-infrared camera CA1, and the end portion 42A is the end portion of the surface portion 42 on the side close to the far-infrared camera CA1. However, the shape of the surface portion 42 can be any shape, for example, it can be a curved surface shape, and it can also be non-plate-like.

[0101] The material of the protection member 40 may be any material, but is preferably made of a material having a higher breaking strength than the transmissive member 20. In addition, the protection member 40 is preferably made of a material having a higher breaking strength than the cover portion 30. Examples of the material of the protection member 40 include stainless steel, aluminum alloy, copper alloy, and fiber-reinforced resin. Examples of the fiber-reinforced resin include glass-reinforced polycarbonate. It should be noted that the breaking strength may be, for example, a value obtained by dividing the load at the time of breaking of the test piece by the minimum cross-sectional area of ​​the broken portion when performing a tensile strength test in accordance with JIS Z2241.

[0102] It should be noted that the protection member 40 is not an essential configuration.

[0103] (Camera installation section)

[0104] like Figure 5As shown, the camera mounting portion 50 is disposed in the first space S1. The camera mounting portion 50 is a mechanism for fixing the far-infrared camera CA1 on the surface 10B on the inner side of the glass member 10. The camera mounting portion 50 has a base 50A, an extension portion 50B and an adjustment portion 50C. The base 50A is a member fixed on the surface 10B. The extension portion 50B is a member extending from the base 50A and fixing the far-infrared camera CA1. The adjustment portion 50C is a mechanism disposed on the extension portion 50B and adjusting the position of the extension portion 50B relative to the base 50A. For example, the adjustment portion 50C adjusts the position of the extension portion 50B relative to the base 50A by changing the direction of the extension portion 50B relative to the base 50A. However, the configuration of the camera mounting portion 50 is not limited to the configuration described above, and may be any configuration for fixing the far-infrared camera CA1 on the glass member 10. In addition, the camera mounting portion 50 is not a necessary configuration.

[0105] (sound-absorbing material)

[0106] The sound absorbing material 60 is a member that is provided in the first space S1 and absorbs at least a part of the sound waves. By providing the sound absorbing material 60, it is possible to more appropriately suppress the sound leakage to the vehicle interior.

[0107] The sound absorbing material 60 is preferably not provided between the transmissive member 20 and the far-infrared camera CA1 in the direction along the optical axis AXR, but provided at other locations. Figure 5 In the example of FIG. 5 , the sound absorbing material 60 is provided on the inner surface of the cover portion 30 (the inner surface 32A of the housing 32 ). However, the sound absorbing material 60 may be provided at any position.

[0108] The material of the sound absorbing material 60 may be any material, for example, at least one of urethane foam, polyethylene foam, melamine foam, synthetic rubber sponge, glass wool, felt and non-woven fabric. By using these materials as the material of the sound absorbing material 60, it is possible to more appropriately suppress the sound leakage to the inside of the vehicle. Among them, when considering the scattering of materials during construction and the ease of processing, soft urethane foam materials are preferred. Cross-linked polyethylene foam with high moisture resistance is also preferred.

[0109] It should be noted that the sound-absorbing material 60 is not a necessary structure. When using the sound-absorbing material 60, it is preferably installed on the shell 32 in a manner covering the first space S1, and is preferably arranged at a position that does not hinder the configuration of the protective component 40, the camera mounting portion 50 and the far-infrared camera CA1, and does not hinder the image acquisition of the far-infrared camera CA1.

[0110] (Effect)

[0111] As described above, the vehicle glass 1 of the present embodiment includes: the glass member 10 having the opening 19 extending from the surface 10A on the vehicle outer side to the surface 10B on the vehicle inner side; the transmissive member 20 disposed in the opening 19 and allowing far infrared rays to be transmitted; and the cover 30 covering the surface 20b on the vehicle inner side of the transmissive member 20. The cover 30 isolates the first space S1 located on the vehicle inner side of the glass member 10 and including the surface 20b on the vehicle inner side of the transmissive member 20 from the space (second space S2) other than the first space S1 on the vehicle inner side of the glass member 10.

[0112] Here, in the configuration where an opening is formed in the glass and a transmissive member is provided, sound leakage from the portion where the transmissive member is provided may occur. In view of this, the vehicle glass 1 of this embodiment is provided with a cover portion 30 in a manner of isolating the first space S1. Therefore, according to this embodiment, sound leakage can be suppressed while appropriately allowing far infrared rays to be transmitted.

[0113] The present disclosure describes the following inventions. However, the present disclosure is not limited to these.

[0114] (1): A vehicle glass, wherein the vehicle glass comprises: a glass member 10, wherein the glass member 10 is formed with an opening 19 extending from a surface 10A on the vehicle outer side to a surface 10B on the vehicle inner side; a transmissive member 20, wherein the transmissive member 20 is disposed in the opening 19 and allows far infrared rays to be transmitted; and a cover 30, wherein the cover 30 covers a surface 20 b on the vehicle inner side of the transmissive member 20, wherein the cover 30 isolates a first space S1 located on the vehicle inner side of the glass member 10 and including the surface 20 b on the vehicle inner side of the transmissive member 20 from a space (a second space S2) other than the first space S1 on the vehicle inner side of the glass member 10.

[0115] (2): The vehicle glass as described in (1), wherein the cover portion 30 includes: a shell 32 that covers the surface 20 b of the transmissive member 20 on the vehicle interior side; and a fixing portion 34 that surrounds the outer periphery of the surface 20 b of the transmissive member 20 on the vehicle interior side and is used to fix the shell 32 to the surface 10B of the glass member 10 on the vehicle interior side.

[0116] (3): The vehicle glass as described in (1) or (2), wherein the vehicle glass further includes a camera mounting portion 50 , which is disposed in the first space S1 and is used to fix the far-infrared camera CA1 to the surface 10B of the glass member 10 on the vehicle interior side.

[0117] (4): The vehicle glass according to (3), wherein a take-out port 32 a is formed on the housing 32 , and the take-out port 32 a is an opening for taking out the wiring W of the far-infrared camera CA1 to the outside of the first space S1 ,

[0118] The vehicle glass further includes a closing portion 36 that closes the removal port 32 a.

[0119] (5): The vehicle glass according to any one of (1) to (4), further comprising a protective member 40 disposed in the first space S1 and overlapping at least a portion of the transmissive member 20 when viewed from a direction orthogonal to a surface 20 a on the vehicle outer side of the transmissive member 20 .

[0120] (6): The vehicle glass according to any one of (1) to (5), further comprising a sound absorbing material 60 provided in the first space S1.

[0121] (7) The vehicle glass according to (6), wherein the sound absorbing material 60 is provided on the inner surface of the cover portion 30 .

[0122] (8): A camera unit comprising: the vehicle glass 1 according to any one of (1) to (7); and a far-infrared camera CA1 disposed in a first space S1.

[0123] (Other Examples of Transmissive Members)

[0124] The transmissive member 20 may include layers other than the substrate 22. For example, the transmissive member 20 may have an anti-reflection film (AR film) for suppressing reflection of far infrared rays on at least one of the surface on the vehicle interior side and the surface on the vehicle exterior side of the substrate 22. The anti-reflection film may have any configuration, for example, it may be a configuration in which high refractive index layers and low refractive index layers are alternately stacked. In this case, in the anti-reflection film, the high refractive index layer and the low refractive index layer may be stacked one layer each, or may be stacked in multiple layers.

[0125] The high refractive index layer is a film having a high refractive index for far infrared rays, and the refractive index of the high refractive index layer for light with a wavelength of 10 μm is preferably 2.5 or more and 4.5 or less, more preferably 3.0 or more and 4.5 or less, and further preferably 3.3 or more and 4.3 or less. The material of the high refractive index layer can be any material, and examples thereof include: a material having at least one material selected from the group consisting of Si and Ge as a main component, diamond-like carbon (DLC), ZnSe, As2S3, As2Se3, etc.

[0126] The low refractive index layer is a film having a low refractive index for far infrared rays, and the refractive index of the low refractive index layer for light with a wavelength of 10 μm is preferably 0.8 or more and 2.0 or less, more preferably 1.0 or more and 1.7 or less, and further preferably 1.0 or more and 1.5 or less. The material of the low refractive index layer can be any material, for example, ZnS, metal oxides (such as SiO x 、Al2O3、NiO x , CuO x , ZnO, ZrO2, Bi2O3, Y2O3, CeO2, HfO2, MgO, TiO x etc.), metal fluorides (such as MgF2, CaF2, SrF2, BaF2, PbF2, LaF3, YF3, etc.), etc.

[0127] In addition, for example, the transmissive member 20 may be formed with a visible light absorbing layer on at least one of the surfaces on the vehicle interior side and the vehicle exterior side of the substrate 22. The visible light absorbing layer is a layer that absorbs visible light. The extinction coefficient of the visible light absorbing layer for light of a wavelength of 550 nm is preferably 0.04 or more, more preferably 0.05 or more, further preferably 0.06 or more, further preferably 0.07 or more, further preferably 0.08 or more, further preferably 0.10 or more. In addition, the average extinction coefficient of the visible light absorbing layer for light of a wavelength of 380 nm to 780 nm is preferably 0.04 or more, more preferably 0.05 or more, further preferably 0.06 or more, further preferably 0.07 or more, further preferably 0.08 or more, further preferably 0.10 or more. By setting the extinction coefficient and the average extinction coefficient within this range, the reflectance dispersion of visible light can be appropriately suppressed, and an appearance that ensures the design of the appearance can be formed.

[0128] The visible light absorbing layer can allow far infrared rays to pass through. The extinction coefficient of the visible light absorbing layer for light with a wavelength of 10 μm is preferably 0.1 or less, more preferably 0.05 or less, and further preferably 0.02 or less.

[0129] The material of the visible light absorbing layer may be any material, but preferably a metal oxide is used as the main component. The main component here may refer to a content of 50% by mass or more relative to the entire visible light absorbing layer. As the metal oxide used in the visible light absorbing layer, nickel oxide (NiO x ), copper oxide (CuO x ) and manganese oxide (MnO x ) At least any one of the following. The visible light absorbing layer is preferably selected from NiO x , CuO x and MnO x As a main component, at least one material in the group of NiO is used. It can be said that the visible light absorbing layer is preferably any of the following:x As the main component, or selected from CuO x and MnO x At least one material in the group is used as the main component. It should be noted that nickel oxide, copper oxide, and manganese oxide are known to have various compositions according to the valences of nickel, copper, and manganese, and x can take any value from 0.5 to 2. In addition, the valence may not be a single one, and two or more valences may be mixed. In this embodiment, NiO x , preferably NiO, as CuO x , preferably CuO, as MnO x , MnO is preferably used. However, the material of the visible light absorbing layer is not limited to these materials, and may be any material, for example, diamond-like carbon (DLC) may also be used.

[0130] In addition, for example, a protective film may be formed on the surface of the transmissive member 20 closest to the vehicle outer side. As the protective film, for example, a material selected from ZrO2, Al2O3, TiO2, Si3N 4、 At least one material selected from the group consisting of AlN and diamond-like carbon (DLC). By forming the protective film, the transmissive member 20 can be appropriately protected.

[0131] (Example)

[0132] Next, examples are described.

[0133] (Example 1)

[0134] A glass member having a size of 300 mm×300 mm and a thickness of 2.0 mm and a PVB having a thickness of 0.76 mm was arranged between soda-lime glasses was prepared as glass for a vehicle.

[0135] (Example 2)

[0136] As a substrate, Si (FZ grade (manufactured by FZ method) having a diameter of 50 mm and a thickness of 2.0 mm±0.05 mm was prepared. The thickness was measured using a digital vernier caliper (manufactured by Mitutoyo Corporation, CD-15CX).

[0137] Next, a 1000nm diamond-like carbon (DLC) film was formed on the surface of the substrate that would become the vehicle exterior by plasma CVD. Then, a Ge film (100nm) and then a ZnS film (1200nm) were formed on the surface of the substrate that would become the vehicle interior by evaporation, thereby manufacturing a transmissive member.

[0138] In the center of the same glass member as in Example 1, a through hole (opening) having a diameter of 54 mm on the vehicle outer side and a diameter of 49 mm on the vehicle inner side was formed.

[0139] Next, an attachment with a transmissive member attached thereto, which was produced by bonding the attachment to the prepared transmissive member using a urethane adhesive, was installed in the through hole so that the outer surface of the transmissive member was flush with the vehicle outer side surface of the laminated glass, thereby obtaining the vehicle glass of Example 2. It should be noted that the attachment was an ABS frame member provided on the outer periphery of the transmissive member.

[0140] (Example 3)

[0141] A vehicle glass according to Example 3 was obtained by the same method as in Example 2 except that the through hole formed in the glass member was adjusted to have a diameter of 53.5 mm.

[0142] (Example 4)

[0143] The vehicle glass obtained by the same method as in Example 3 was provided with a cover, thereby obtaining the vehicle glass of Example 4. Specifically, the cover was obtained by casting using a simple mold using ABS (acrylonitrile-butadiene-styrene copolymer). The obtained cover was placed on the surface of the glass member on the inside of the vehicle in a manner that covered the surface of the transmissive member on the inside of the vehicle. In Example 4, the gap between the cover and the glass member was not closed, and the space inside the cover was not shielded.

[0144] (Example 5)

[0145] In the vehicle glass obtained by the same method as in Example 4, the space in the cover portion was shielded to obtain the vehicle glass of Example 5. In Example 5, the gap between the cover portion and the glass member was sealed with an adhesive tape.

[0146] (Example 6)

[0147] In the vehicle glass obtained by the same method as in Example 5, a sound absorbing material (CALMFLEX F-9M manufactured by INOAC CORPORATION) was disposed on the inner surface of the cover portion to prepare a vehicle glass of Example 6.

[0148] (Example 7)

[0149] In the vehicle glass obtained by the same method as in Example 5, a polyester wool sound absorbing material was arranged on the inner surface of the cover portion, thereby producing a vehicle glass of Example 7.

[0150] (evaluate)

[0151] Figure 8 : is a graph showing the transmission loss evaluation results of each example. The transmission sound of the vehicle glass of each example was evaluated using the following measuring device.

[0152] The evaluation device includes an acrylic polymer soundproof box with an opening, a speaker for generating white noise installed in the soundproof box, and a microphone arranged above the soundproof box. The device is installed in a room simulating an anechoic field. An analyzer is installed on the microphone to measure the frequency of the sound pressure level.

[0153] The sample was fixed to the opening of the evaluation device so that no sound would leak from the surroundings, and the transmitted sound pressure of white noise generated from the speaker was evaluated in the range of 100 Hz to 15,000 Hz.

[0154] The evaluation results of each example are shown in Figure 8 middle. Figure 8 The horizontal axis represents the frequency (Hz) of the sound wave used for sound leakage evaluation, and the vertical axis represents the transmission loss (dB). Figure 8 Lines L1 to L8 respectively represent the transmission loss at each frequency of the vehicle glass of Examples 1 to 8. A higher transmission loss means less sound leakage (higher sound insulation).

[0155] Examples 1 to 4 are comparative examples, and Examples 5 to 7 are embodiments.

[0156] It is found that, as shown in Examples 2 and 3, when an opening is formed in a glass member and a transmissive member is arranged, sound leakage increases compared to Example 1 in which no opening is formed.

[0157] It is found that even when an opening is formed and a transmissive member is disposed as in Example 4, sound leakage can be suppressed to a certain extent compared with Examples 1 to 3 by disposing a cover.

[0158] It is understood that, as shown in Example 5, by providing the cover portion so as to shield the space inside the cover portion, sound leakage can be appropriately suppressed compared with Examples 1 to 4 and the like.

[0159] It is understood that, as shown in Examples 6 and 7, by shielding the space in the cover and providing a sound absorbing material, sound leakage can be further suppressed.

[0160] Above, the embodiments of the present invention have been described, but the embodiments are not limited to the contents of the embodiments. In addition, the aforementioned constituent elements include elements that can be easily thought of by those skilled in the art, substantially the same elements, and elements of so-called equivalent scopes. In addition, the aforementioned constituent elements can be appropriately combined. In addition, various omissions, substitutions or changes of constituent elements can be performed within the scope of the gist of the aforementioned embodiments.

[0161] Description of symbols

[0162] 1. Glass for vehicles

[0163] 10 Glass components

[0164] 19 Opening

[0165] 20 Transmission components

[0166] 30 Hood

[0167] 40 Protective components

[0168] 42 Surface

[0169] CA1 Far Infrared Camera

[0170] S1 First Space

[0171] V Vehicle

Claims

1. A glass for a vehicle, wherein: The vehicle glass has: a glass member having an opening formed therein and extending from a surface on the vehicle outer side to a surface on the vehicle inner side; a transmissive member that is disposed in the opening and allows far infrared rays to be transmitted; and a cover portion that covers a surface of the transmissive member on the vehicle interior side, The cover portion isolates a first space located on the vehicle interior side of the glass member and including a surface of the transmissive member on the vehicle interior side from a space other than the first space on the vehicle interior side of the glass member.

2. The vehicle glass according to claim 1, wherein: The cover portion has: a housing covering a surface of the transmissive member on the vehicle interior side; and A fixing portion surrounds the outer periphery of the surface of the transmissive member on the vehicle interior side and fixes the housing to the surface of the glass member on the vehicle interior side.

3. The vehicle glass according to claim 2, wherein: The vehicle glass further includes a camera mounting portion, which is disposed in the first space and is used to fix a far-infrared camera to a surface of the glass member on the inner side of the vehicle.

4. The vehicle glass according to claim 3, wherein: The housing is provided with a take-out port, which is an opening for taking out the wiring of the far-infrared camera to the outside of the first space. The vehicle glass further includes a sealing portion that seals the removal opening.

5. The vehicle glass according to claim 1 or 2, wherein: The vehicle glass further includes a protection member that is provided in the first space and overlaps at least a portion of the transmissive member when viewed from a direction perpendicular to a surface of the transmissive member on the vehicle outer side.

6. The vehicle glass according to claim 1 or 2, wherein: The vehicle glass further includes a sound absorbing material disposed in the first space.

7. The vehicle glass according to claim 6, wherein: The sound absorbing material is arranged on the inner surface of the cover.

8. A camera unit, wherein: The camera unit includes: the vehicle glass according to claim 1 or 2; and a far-infrared camera disposed in the first space.

Images