Glass member, method for manufacturing glass member, and method for manufacturing vehicle glass

Abstract

The present invention appropriately forms an opening. This glass member (10) has a glass substrate, a light-shielding layer (18) provided on the surface of the glass substrate, and a mark (M) provided in a region where the light-shielding layer (18) is provided. The reflectance of visible light at the position of the glass member (10) where the mark (M) is provided is higher than the reflectance of visible light at the position of the glass member (10) where the light-shielding layer (18) is provided.

Description

Glass component, method for manufacturing a glass component, and method for manufacturing vehicle glass

[0001] The present invention relates to a glass component, a method for manufacturing a glass component, and a method for manufacturing vehicle glass.

[0002] In some cases, an opening is formed in the glass component. Patent Document 1 describes a vehicle glass in which an opening is formed in the glass component, a transmissive member capable of transmitting far-infrared rays is provided in the opening, and far-infrared rays are received through the transmissive member.

[0003] International Publication No. 2022 / 045011

[0004] However, variations in the dimensions of the glass components and their position relative to the processing machine may prevent the opening from being properly formed.

[0005] The present invention aims to provide a glass member capable of appropriately forming an opening, a method for manufacturing a glass member, and a method for manufacturing vehicle glass.

[0006] The glass member according to this disclosure is a glass member having a glass substrate, a light-shielding layer provided on the surface of the glass substrate, and a mark provided within the region where the light-shielding layer is provided, wherein the reflectance of visible light at the position where the mark is provided on the glass member is higher than the reflectance of visible light at the position where the light-shielding layer is provided on the glass member.

[0007] A method for manufacturing a glass member according to this disclosure includes preparing a glass substrate, providing a light-shielding layer on the surface of the glass substrate, and providing a mark within the region where the light-shielding layer is provided that has a higher reflectivity of visible light than the position where the light-shielding layer is provided, thereby obtaining a glass member.

[0008] A method for manufacturing vehicle glass according to this disclosure includes forming an opening in the glass member at the position where the mark is provided, which penetrates from one surface of the glass member to the other surface, and arranging a far-infrared-transmitting member within the opening.

[0009] According to the present invention, an opening can be properly formed.

[0010] Figure 1 is a schematic plan view of the glass according to the embodiment. Figure 2A is a schematic cross-sectional view of the glass according to the embodiment. Figure 2B is a schematic cross-sectional view of the glass according to the embodiment. Figure 3 is a flowchart illustrating a method for manufacturing the glass member according to the embodiment. Figure 4 is a schematic cross-sectional view of a glass member according to another example. Figure 5 is a schematic cross-sectional view of a glass member according to another example. Figure 6 is a schematic cross-sectional view of a glass member according to another example. Figure 7 is a schematic cross-sectional view of a glass member according to another example. Figure 8 is a schematic diagram showing the vehicle glass according to the embodiment mounted on a vehicle. Figure 9 is a schematic plan view of the vehicle glass according to the embodiment. Figure 10 is a cross-sectional view along line A-A in Figure 9. Figure 11 is a cross-sectional view along line B-B in Figure 9. Figure 12 is a diagram showing an example of a configuration when a far-infrared camera is attached to the vehicle glass. Figure 13 is a schematic diagram showing an example of a method for forming an opening.

[0011] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. However, the present invention is not limited to these embodiments, and if there are multiple embodiments, they may be constructed by combining each embodiment. Furthermore, numerical values ​​include a range of rounding. In addition, in this embodiment, the lower and upper limits can be combined as appropriate. That is, for example, if a lower limit is listed for a certain parameter and an upper limit is listed for that parameter, the lower limit may be any value selected from the listed lower limits, and the upper limit may be any value selected from the listed upper limits.

[0012] (Glass Member) Figure 1 is a schematic plan view of the glass according to the embodiment. Figures 2A and 2B are schematic cross-sectional views of the glass according to the embodiment. The glass member 10 according to this embodiment is a glass member on which alignment marks M are provided. In a later process, an opening is formed in the glass member 10 at the location where the marks M are provided, and the glass member 10 is used in the state in which the opening has been formed. The glass member 10 is used as vehicle glass mounted on a vehicle, but its use is not limited to vehicle glass and may be arbitrary.

[0013] As shown in Figure 1, the upper edge of the glass member 10 will be referred to as the upper edge portion 1a, the lower edge as the lower edge portion 1b, one side edge as the side edge portion 1c, and the other side edge as the side edge portion 1d. The upper edge portion 1a is the edge portion located on the vertically upper side when the glass member 10 is mounted on the vehicle V. The lower edge portion 1b is the edge portion located on the vertically lower side when the glass member 10 is mounted on the vehicle V. The side edge portion 1c is the edge portion located on one side when the glass member 10 is mounted on the vehicle V. The side edge portion 1d is the edge portion located on the other side when the glass member 10 is mounted on the vehicle V.

[0014] Hereinafter, among the directions parallel to the surface of the glass member 10, the direction from the upper edge 1a toward the lower edge 1b will be defined as the Y direction, and the direction from the side edge 1c toward the side edge 1d will be defined as the X direction. In this embodiment, the X direction and the Y direction are orthogonal. The direction perpendicular to the surface of the glass member 10, that is, the thickness direction of the glass member 10, will be defined as the Z direction. Furthermore, one direction along the Z direction will be defined as the Z1 direction (first direction), and the direction opposite to the Z1 direction will be defined as the Z2 direction (second direction). The Z1 direction is, for example, the direction from the inside to the outside of the vehicle V when the glass member 10 is mounted on the vehicle V. The Z2 direction is, for example, the direction from the outside to the inside of the vehicle V when the glass member 10 is mounted on the vehicle V. The X direction and the Y direction are along the surface of the glass member 10, but for example, if the surface of the glass member 10 is curved, they may be directions that are tangent to the surface of the glass member 10 at the center point O of the glass member 10. The center point O is the central position of the glass member 10 when viewed from the Z direction.

[0015] In this embodiment, the glass member 10 is curved, and more specifically, it is curved such that the Z1 direction is convex. However, the glass member 10 is not limited to being curved, and may be flat.

[0016] Figure 2A is a cross-sectional view of the glass member 10 in a location where the light-shielding layer 18 is not formed, and Figure 2B is a cross-sectional view of the glass member 10 in a location where the light-shielding layer 18 is formed. The glass member 10 may be single-pane glass or laminated glass, but in this embodiment, the glass member 10 is laminated glass in which a first glass substrate 12 and a second glass substrate 14 are laminated with an intermediate layer 16 in between. Specifically, as shown in Figure 2B, the glass member 10 comprises a first glass substrate 12, a second glass substrate 14, an intermediate layer 16, and a light-shielding layer 18. In the glass member 10, the first glass substrate 12, the light-shielding layer 18, the intermediate layer 16, and the second glass substrate 14 are laminated in this order in the Z2 direction. Furthermore, since the light-shielding layer 18 is provided only in a portion of the glass member 10 when viewed from the Z direction, in areas where the light-shielding layer 18 is not formed, the glass member 10 consists of a first glass substrate 12, an intermediate layer 16, and a second glass substrate 14, which are stacked in this order in the Z2 direction. The first glass substrate 12 and the second glass substrate 14 are fixed (bonded) to each other via the intermediate layer 16.

[0017] The first glass substrate 12 includes one surface 12A (the surface facing Z1) and the other surface 12B (the surface facing Z2). In areas where the light-shielding layer 18 is not formed, surface 12B is in contact with the surface of the intermediate layer 16 facing Z1 and is fixed (bonded) to the intermediate layer 16. The second glass substrate 14 includes one surface 14A (the surface facing Z1) and the other surface 14B (the surface facing Z2). Surface 14A is in contact with the surface of the intermediate layer 16 facing Z2 and is fixed (bonded) to the intermediate layer 16. Thus, the vehicle glass 1 is a laminated glass formed by laminating the first glass substrate 12 and the second glass substrate 14. However, the vehicle glass 1 is not limited to laminated glass; for example, it may be a configuration that includes only one of the first glass substrate 12 and the second glass substrate 14 (i.e., a single-pane glass). In this case, the intermediate layer 16 may not be provided. Hereafter, unless otherwise distinguished, the first glass substrate 12 and the second glass substrate 14 will be referred to simply as "glass substrate."

[0018] The glass substrate may be inorganic glass or organic glass. Examples of inorganic glass include soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, and quartz glass, which can be used without particular restriction. Among these, soda-lime glass is particularly preferred in terms of manufacturing cost and moldability. For example, in the case of inorganic glass, glass plates formed by the float process are preferred. When the glass substrate is inorganic glass, it may be either untempered glass or tempered glass. Tempered glass may be either physically tempered glass or chemically tempered glass. Untempered glass is formed by shaping molten glass into a plate and slowly cooling it. Tempered glass is formed by creating a compressive stress layer on the surface of untempered glass. Tempered glass may be either physically tempered glass or chemically tempered glass. In the case of physically tempered glass, the glass surface may be strengthened by creating a compressive stress layer on the glass surface due to the temperature difference between the glass surface and the interior of the glass, through operations other than slow cooling, such as air-cooled tempering, where a uniformly heated glass plate is rapidly cooled from a temperature near its softening point during bending. If the glass is chemically strengthened, the glass surface may be strengthened after bending by generating compressive stress on the glass surface using methods such as ion exchange. Known molding techniques such as gravity molding, press molding, and roller molding may be used for bending the glass substrate. Glass that absorbs ultraviolet or infrared rays may also be used. Furthermore, the glass substrate may be transparent or colored. The thickness of the glass substrate is not particularly limited, but it is preferably 0.3 mm or more, more preferably 0.5 mm or more, even more preferably 1 mm or more, even more preferably 1.5 mm or more, and most preferably 2 mm or more. The thickness of the glass substrate is preferably 5 mm or less, more preferably 4 mm or less, and even more preferably 3 mm or less. The intermediate layer 16 is an adhesive layer that bonds the first glass substrate 12 and the second glass substrate 14. As the intermediate layer 16, known materials such as polyvinyl butyral (hereinafter also referred to as PVB) modified material, ethylene-vinyl acetate copolymer (EVA) material, urethane resin material, and vinyl chloride resin material can be used.Furthermore, the intermediate layer 16 may contain functional particles such as ultraviolet absorbers, infrared absorbers, adhesion enhancers, antioxidants, and light stabilizers. The intermediate layer 16 may be transparent or colored. The intermediate layer 16 may also have a multilayer structure of two or more layers. When the glass member 10 is attached to a vehicle, the glass member 10 may have a curved shape that protrudes outward from the vehicle. The curved shape of the glass member 10 from the periphery to the center may be a curved shape that curves in only one direction, a curved shape that curves in two orthogonal directions, or a curved shape that curves in three or more directions. The thickness of the glass member 10 is not particularly limited, but is preferably 3 mm or more, more preferably 4 mm or more, even more preferably 4.5 mm or more, even more preferably 5 mm or more, and most preferably 6 mm or more. Furthermore, the thickness of the glass member 10 is preferably 10 mm or less, more preferably 9 mm or less, even more preferably 8 mm or less, and most preferably 7 mm or less. In this embodiment, the upper and lower limits can be combined as appropriate. Furthermore, if the glass component 10 is laminated glass, the above plate thickness may be read as the total thickness of the laminated glass.

[0019] (Light-shielding layer) The light-shielding layer 18 is a layer that shields visible light (wavelength 380 nm to 830 nm). The light-shielding layer 18 may be provided in a band shape along the periphery of the vehicle glass 1. This suppresses the deterioration of aesthetics due to refraction of the glass substrate. Furthermore, it is preferable that the light-shielding layer 18 is a layer that shields ultraviolet rays (wavelength 300 nm to 380 nm). This suppresses the exposure of components that are easily degraded by ultraviolet rays (for example, the intermediate layer 16 and the adhesive layers 50 and 52 described later) to sunlight. Preferably, the light-shielding layer 18 also shields infrared rays (wavelength 830 nm to 2000 nm). Shielding is achieved, for example, by absorbing the target light ray. For example, the visible light transmittance and ultraviolet light transmittance of the light-shielding layer 18 are 5% or less, preferably 3% or less, more preferably 1% or less, and even more preferably substantially 0%. The degree of shielding may vary depending on the wavelength of the light ray. The transmittance of light at each wavelength can be measured, for example, using an ultraviolet-visible-near-infrared spectrophotometer (Hitachi High-Tech Corporation, product name: U-4100). The reflectance of visible light at the position where the light-shielding layer 18 is provided on the glass member 10 (light-shielding region A2) is preferably 2% or less, and more preferably 1% or less. The reflectance of visible light here refers to the reflectance of visible light when visible light is irradiated onto the glass member 10 from the Z1 direction. The reflectance of visible light can be measured in accordance with the provisions of JIS R3106 "Test methods for transmittance, reflectance and emissivity of plate glass and calculation method for solar heat gain coefficient of building plate glass".

[0020] The light-shielding layer 18 is configured as a substantially opaque layer. For example, a ceramic light-shielding layer or a light-shielding film can be used as the light-shielding layer 18. For example, a ceramic layer made of conventionally known materials such as a black ceramic layer can be used as the ceramic light-shielding layer. 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 as the light-shielding film.

[0021] As shown in Figure 2B, in this embodiment, the light-shielding layer 18 is provided between the first glass substrate 12 and the intermediate layer 16, that is, on the surface 12B of the first glass substrate 12 in the Z2 direction. However, the position where the light-shielding layer 18 is provided is not limited to this, and for example, as will be described later, it may be provided on the surface 14B of the second glass substrate 14 in the Z2 direction. In other words, the light-shielding layer 18 may be provided on the surface 14B of the second glass substrate 14, or on the surface 12B of the first glass substrate 12, or on both surfaces 14B and 12B. Furthermore, the light-shielding layer 18 may be formed on, for example, surface 12B or surface 14A, or a part of the intermediate layer 16 may be the light-shielding layer 18. When a part of the intermediate layer 16 is the light-shielding layer 18, a part of the intermediate layer 16 may be colored with a dark dye, or a layer containing a dark dye may be provided in a part of the intermediate layer 16.

[0022] As shown in Figure 1, the light-shielding layer 18 is provided only in a portion of the glass member 10 when viewed from the Z direction. The light-shielding layer 18 is provided on the periphery of the glass member 10 when viewed from the Z direction, and is provided so as to surround the central region of the glass member 10. Here, when viewed from the Z direction, if the region where the light-shielding layer 18 is formed is called the light-shielding region A2, then the light-shielding region A2 is provided so as to surround the light-transmitting region A1 in the center of the glass member 10 where the light-shielding layer 18 is not formed. The light-transmitting region A1 is a region where the first glass substrate 12, the intermediate layer 16, and the second glass substrate 14 are laminated and the light-shielding layer 18 is not laminated, and the light-shielding region A2 is a region where the first glass substrate 12, the light-shielding layer 18, the intermediate layer 16, and the second glass substrate 14 are laminated. The light-transmitting region A1 is a region that transmits visible light, and the light-shielding region A2 is a region that blocks visible light. In other words, the visible light transmittance in the light-shielding region A2 is lower than the visible light transmittance in the light-transmitting region A1.

[0023] (Mark) The glass member 10 has a mark M formed within the light-shielding region A2 where the light-shielding layer 18 is provided. In other words, when viewed from the Z direction, the mark M is inside the outer peripheral edge of the light-shielding region A2 (light-shielding layer 18) and outside the inner peripheral edge of the light-shielding region A2 (light-shielding layer 18) (the boundary line between the light-transmitting region A1 and the light-shielding region A2). The mark M may be provided at any position within the light-shielding region A2, but in this embodiment, it is provided within the light-shielding region A2a, which is the portion of the light-shielding region A2 on the upper edge 1a side. That is, in this embodiment, the mark M is provided between the light-transmitting region A1 and the upper edge 1a.

[0024] Mark M is an alignment mark and, in this embodiment, is provided at a position that forms the opening 19, which will be described later. The visible light reflectance of the glass member 10 at the position where Mark M is provided is higher than the visible light reflectance at the position where the light-shielding layer 18 is provided (light-shielding region A2). The visible light reflectance here refers to the visible light reflectance when visible light is irradiated onto the glass member 10 from the Z1 direction. The visible light reflectance can be measured in accordance with the provisions of JIS R3106 "Test method for transmittance, reflectance and emissivity of plate glass and method for calculating the solar heat gain coefficient of building plate glass". The visible light reflectance of the glass member 10 at the position where Mark M is provided is preferably 2% or more and 10% or less, and more preferably 3% or more and 8% or less. Furthermore, the value obtained by subtracting the reflectance of visible light at the position where the light-shielding layer 18 of the glass member 10 is provided (light-shielding region A2) from the reflectance of visible light at the position where the mark M of the glass member 10 is provided (visible light reflectance at mark M - visible light reflectance at the light-shielding layer 18) is preferably 0.5% or more, more preferably 3% or more, and may be, for example, 8% or less.

[0025] Mark M may be formed from any material with a higher transmittance and reflectance of visible light than the light-shielding layer 18, but in this embodiment, it is formed by not providing the light-shielding layer 18. That is, when viewed from the Z direction, at the position where Mark M is formed, the first glass substrate 12, the intermediate layer 16, and the second glass substrate 14 are laminated, and the light-shielding layer 18 is not laminated. In Figure 2B, for the sake of explanation, the location where Mark M is formed is shown as a cavity, but the intermediate layer 16 may be filled in the location where Mark M is formed.

[0026] Mark M may be formed by any method. For example, by forming a light-shielding layer 18 while masking the position where Mark M is to be formed, Mark M can be formed without providing a light-shielding layer 18 at the position of Mark M. Alternatively, for example, Mark M may be formed by first forming a light-shielding layer 18 at the position where Mark M is to be formed, and then removing the light-shielding layer 18 from the position where Mark M is to be formed.

[0027] The shape and size of Mark M may be arbitrary, but an example in this embodiment will be described below.

[0028] The diameter of the smallest circle that encloses the entire mark M (the smallest circle from which the mark M does not protrude) is preferably 7 mm or more, more preferably 14 mm or more, and even more preferably 25 mm or more. Furthermore, the diameter of the smallest circle that encloses the entire mark M (the smallest circle from which the mark M does not protrude) is preferably 80 mm or less, more preferably 70 mm or less, and even more preferably 50 mm or less. In this embodiment, the lower limit and upper limit may be combined as appropriate. The diameter of the smallest circle that encloses the entire mark M refers to, for example, the diameter of the periphery of the mark M if the periphery of the mark M is circular, and the circumscribed circle of the polygon if the periphery of the mark M is polygonal. The lower limit of the size of the mark M being within this range allows for appropriate determination of the position of the mark M and for appropriate formation of the opening 19. Furthermore, the upper limit of the size of the mark M being within this range allows for appropriate removal of the mark M without it protruding from the opening 19 when forming the opening 19.

[0029] The width D0 of mark M is preferably 0.1 mm or more, more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. The width D0 of mark M is preferably 10 mm or less, more preferably 5 mm or less, and even more preferably 2 mm or less. The width D0 of mark M refers to the length of mark M in a direction perpendicular to the direction in which the trajectory of mark M extends, as viewed from the Z direction. When the width D0 of mark M is within this range, the position of mark M can be appropriately determined and the opening 19 can be appropriately formed.

[0030] The mark M preferably includes a first mark M1 and a second mark M2. The first mark M1 is a mark indicating the position of the opening 19 to be formed later, and is used, for example, to align the processing machine that forms the opening 19 with the glass member 10. In this embodiment, the first mark M1 is provided at the center of the opening 19 and indicates the center of the opening 19. The first mark M1 may have any shape, but as shown in Figure 1, for example, it may be a cross shape when viewed from the Z direction, and the center of the cross may be the center position of the opening 19.

[0031] The second mark M2 surrounds the first mark M1 when viewed from the Z direction. The second mark M2 is used, for example, to align with the base that fixes the glass member 10 in order to form the opening 19. The second mark M2 may have any shape, but as shown in Figure 1, it may be circular (a shape that traces the periphery of a circle) when viewed from the Z direction. In this case, it is preferable that the center of the circle with the second mark M2 as its circumference coincides with the center of the cross of the first mark M1. Note that the second mark M2 is not limited to a circular shape, but may also be elliptical (a shape that traces the periphery of an ellipse) or polygonal (a shape that traces the periphery of a polygon). Note that when the mark M contains multiple marks, such as the first mark M1 and the second mark M2, it is preferable that the width of each mark is within the numerical range of the width D0 described above.

[0032] (Visible Light Transmission Region) As shown in FIG. 1, in the present embodiment, in the glass member 10, a visible light transmission region C is provided within the light shielding region A2 where the light shielding layer 18 is provided. When viewed from the Z direction, it is preferable that the area of the visible light transmission region C is larger than that of the mark M. The visible light transmission region C is a region that transmits visible light and has a higher visible light transmittance than the light shielding region A2. The visible light transmission region C is formed by not providing the light shielding layer 18. That is, when viewed from the Z direction, at the position where the visible light transmission region C is formed, the first glass substrate 12, the intermediate layer 16, and the second glass substrate 14 are laminated, and the light shielding layer 18 is not laminated. The visible light transmission region C is a region for transmitting visible light incident on the visible light camera CA2 described later. That is, the visible light camera CA2 is provided at a position overlapping the visible light transmission region C when viewed from the optical axis direction of the visible light camera CA2.

[0033] The visible light transmission region C may be provided at any position within the light shielding region A2, but in the present embodiment, it is provided within the light shielding region A2a, which is a portion on the upper edge portion 1a side of the light shielding region A2. That is, in the present embodiment, the visible light transmission region C is provided between the light transmission region A1 and the upper edge portion 1a. The visible light transmission region C may be provided, for example, at a position aligned with the mark M in the X direction.

[0034] (Manufacturing Method of Glass Member) Next, the manufacturing method of the glass member 10 will be described. FIG. 3 is a flowchart for explaining the manufacturing method of the glass member according to the embodiment.

[0035] As shown in FIG. 3, in this manufacturing method, a flat glass substrate (the first glass substrate 12 and the second glass substrate 14 in this embodiment) is prepared (step S10). Then, a light-shielding layer 18 and a mark M are formed on the flat glass substrate (step S12). In this embodiment, the light-shielding layer 18 and the mark M are formed on the surface 12B of the first glass substrate 12. In this step, the light-shielding layer 18 and the mark M may be formed by forming the light-shielding layer 18 in a state where masking is performed at the position where the mark M on the surface 12B is formed. In this case, it is preferable to perform masking also at the positions where the light-transmitting region A1 and the visible light transmitting region C are formed. For example, after forming the light-shielding layer 18 on the surface 12B, the light-shielding layer 18 may be removed from the position where the mark M is formed. In this case, it is preferable to remove the light-shielding layer 18 also from the positions where the light-transmitting region A1 and the visible light transmitting region C are formed.

[0036] Next, in this manufacturing method, the glass substrate (the first glass substrate 12 and the second glass substrate 14 in this embodiment) is curved (step S14). In this embodiment, the glass substrate is curved so that the Z1 direction is convex. Then, the curved glass substrates are laminated to obtain the glass member 10 (step S16). In this embodiment, the first glass substrate 12 on which the light-shielding layer 18 and the mark M are formed and curved, the intermediate layer 16, and the curved second glass substrate 14 are laminated to obtain the glass member 10.

[0037] Note that in the above, the glass substrate was curved after forming the mark M, but it is not limited thereto, and the light-shielding layer 18 and the mark M may be formed after curving the glass substrate.

[0038] (Effect) As described above, the glass member 10 of this embodiment has a glass substrate, a light-shielding layer 18 provided on the surface of the glass substrate, and a mark M provided in the light-shielding region A2. According to this embodiment, alignment can be performed by the mark M to form the opening 19, so that it is possible to suppress the actual position where the opening 19 is formed from deviating from the position where the opening 19 is desired to be formed, and the opening 19 can be appropriately formed.

[0039] (Other Examples) As shown in Figure 2B, in the above embodiment, the light-shielding layer 18 and the mark M were formed only on the surface 12B of the first glass substrate 12. However, the positions in which the light-shielding layer 18 and the mark M are formed are not limited to this. In the following, other examples in which the positions in which the light-shielding layer 18 and the mark M are formed differ from those in this embodiment will be described. Figures 4 to 7 are schematic cross-sectional views of glass members according to other examples.

[0040] As shown in Figure 4, a light-shielding layer 18 and a mark M may be provided on the surface 12B of the first glass substrate 12 (between the first glass substrate 12 and the intermediate layer 16) and on the surface 14B of the second glass substrate 14. In this example, a light-shielding layer 18a is provided on the surface 12B of the first glass substrate 12, and a mark Ma is provided on the light-shielding layer 18a. Also, a light-shielding layer 18b is provided on the surface 14B of the second glass substrate 14, and a mark Mb is provided on the light-shielding layer 18b. In this example, it is preferable that the mark Ma and the mark Mb have the same shape and size. It is also preferable that the mark Ma and the mark Mb are provided in positions that overlap when viewed from the Z direction. In this case, it is preferable to include a step of aligning the mark Ma and the mark Mb so that they overlap when viewed from the Z direction. By providing light-shielding layers 18 on surfaces 12B and 14B in this manner, and by providing a mark M on each light-shielding layer 18, the transmission of visible light is appropriately suppressed in the light-shielding region A2, while the mark M can be appropriately seen when forming the opening 19.

[0041] Furthermore, as shown in Figure 5, a light-shielding layer 18a may be provided on the surface 12B of the first glass substrate 12, a light-shielding layer 18b may be provided on the surface 14B of the second glass substrate 14, and the mark M may be provided on the light-shielding layer 18a. In other words, in this example, the mark M is provided on the light-shielding layer 18a, but not on the light-shielding layer 18b. Note that the configuration in this example, having two light-shielding layers 18, can appropriately suppress the transmission of visible light more effectively than the configuration in the embodiment (Figure 2B) in which the light-shielding layer 18a is provided only on the surface 12B of the first glass substrate 12. On the other hand, the configurations in the embodiment of Figure 2B and the example in Figure 4 can provide higher visibility of the mark M than the configuration in this example.

[0042] Furthermore, as shown in Figure 6, the light-shielding layer 18 and mark M may not be provided on the surface 12B of the first glass substrate 12, while the light-shielding layer 18 and mark M may be provided on the surface 14B of the second glass substrate 14.

[0043] Furthermore, as shown in Figure 7, a light-shielding layer 18a may be provided on the surface 12B of the first glass substrate 12, a light-shielding layer 18b may be provided on the surface 14B of the second glass substrate 14, and the mark M may be provided on the light-shielding layer 18b. In other words, in this example, the mark M is provided on the light-shielding layer 18b, but not on the light-shielding layer 18a. The configuration in this example can appropriately suppress the transmission of visible light more effectively than the configuration in the embodiment (Figure 2B) in which the light-shielding layer 18a is provided only on the surface 12B of the first glass substrate 12. However, the configuration in the embodiment of Figure 2B and the example in Figure 4 can provide higher visibility of the mark M than the configuration in this example. When using the configuration in this example, it is preferable to illuminate the glass member 10 from the surface 14B side with illumination light when forming the opening 19, and to have a camera used to confirm the position of the mark M image the glass member 10 from the surface 14B side. This allows the position of the mark M to be appropriately visible.

[0044] (Vehicle Glass) Next, a vehicle glass 1 having a glass member 10 will be described. Figure 8 is a schematic diagram showing the vehicle glass according to the embodiment mounted on a vehicle, Figure 9 is a schematic plan view of the vehicle glass according to the embodiment, Figure 10 is a cross-sectional view along line A-A in Figure 9, and Figure 11 is a cross-sectional view along line B-B in Figure 9.

[0045] As shown in Figure 8, the vehicle glass 1 is mounted on the vehicle V. The vehicle glass 1 is a window member applied to the windshield of the vehicle V. In other words, the vehicle glass 1 is used as the front windshield of the vehicle V, or in other words, as a windshield. Inside the vehicle V, a far-infrared camera CA1 and a visible light camera CA2 are installed. The inside of the vehicle V refers to, for example, the interior of the vehicle where the driver's seat is located.

[0046] The vehicle glass 1, far-infrared camera CA1, and visible light camera CA2 constitute the camera unit 100. The far-infrared camera CA1 is a camera that detects far-infrared rays. The far-infrared camera CA1 captures a thermal image of the outside of the vehicle V by detecting far-infrared rays from outside the vehicle V. The visible light camera CA2 is a camera that detects visible light. The visible light camera CA2 captures an image of the outside of the vehicle V by detecting visible light from outside the vehicle V. In addition to the far-infrared camera CA1 and the visible light camera CA2, the camera unit 100 may further include, for example, LiDAR (Light Detection and Ranging) or millimeter-wave radar. Here, far-infrared rays refer to, for example, electromagnetic waves in the wavelength band of 8 μm to 13 μm, and visible light refers to, for example, electromagnetic waves in the wavelength band of 380 nm to 830 nm.

[0047] (Glass Member) The vehicle glass 1 comprises a glass member 10T and a far-infrared transmitting unit U provided within the opening 19 of the glass member 10T. The glass member 10T is the glass member 10 after the opening 19 has been formed. In other words, the glass member 10T can be said to be the glass member 10 with the opening 19 formed at the position where the mark M is formed.

[0048] The opening 19 is an opening that penetrates from the inner surface 10B (Z2 direction surface 18B) of the glass member 10T to the outer surface 10A (Z1 direction surface 12A). As shown in Figure 9, the opening 19 is formed in the light-shielding region A2a. The light-shielding region A2a surrounds the opening 19. A far-infrared transmission unit U, described later, is provided inside the opening 19. If the region where the opening 19 is formed and the far-infrared transmission unit U is provided is called the far-infrared transmission region B, then the light-shielding layer 18 is not provided in the far-infrared transmission region B. That is, in the far-infrared transmission region B, the first glass substrate 12, the intermediate layer 16, the second glass substrate 14, and the light-shielding layer 18 are not provided, and the far-infrared transmission unit U is provided in the formed opening 19.

[0049] (Far-infrared transmission unit) As shown in Figure 10, the vehicle glass 1 has a far-infrared transmission unit U. The far-infrared transmission unit U is provided in the opening 19.

[0050] The far-infrared transmission unit U comprises a transmission member 20, a frame member 30 provided on the periphery of the transmission member 20, an adhesive layer 50 for bonding the frame member 30 and the glass member 10, and an adhesive layer 52 for bonding the transmission member 20 and the frame member 30. Note that the frame member 30 and the adhesive layers 50 and 52 are not essential components, and the transmission member 20 may be directly attached to the glass member 10. In the following description, when the transmission member 20 is viewed from the Z direction, the direction toward the geometric center of the transmission member 20 (opening 19) may be described as the radially inward direction, and the direction away from the geometric center may be described as the radially outward direction.

[0051] (Transmitting Member) The transmitting member 20 is positioned inside the opening 19 and transmits far-infrared rays. The average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm is higher for the transmitting member 20 than for the glass member 10. The average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm is higher for the transmitting member 20 than for the frame member 30. Preferably, the average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm for the transmitting member 20 is 25% or more, more preferably 40% or more, even more preferably 50% or more, even more preferably 70% or more, and particularly preferably 85% or more. Furthermore, it is preferable that the average transmittance of far-infrared rays with wavelengths of 8 μm to 13 μm for the transmitting member 20 is 100% or less. In order to make the average transmittance of far-infrared rays 85% or more, it is preferable to provide an anti-reflective coating. When the average transmittance of far-infrared rays is within this numerical range, far-infrared rays are transmitted appropriately, and the performance of the far-infrared camera CA1 can be fully demonstrated. Furthermore, the transmittance of far-infrared rays can be measured, for example, using a Fourier transform infrared spectrometer (manufactured by ThermoScientific, product name: Nicolet iS10).

[0052] The material of the transmissive member 20 is not particularly limited, and examples thereof include ZnS, Ge, Si, chalcogenide glass, and the like. A preferable composition of the chalcogenide glass is, in atomic%, Ge + Ga: 7% to 25%, Sb: 0% to 35%, Bi: 0% to 20%, Zn: 0% to 20%, Sn: 0% to 20%, Si: 0% to 20%, La: 0% to 20%, S + Se + Te: 55% to 80%, Ti: 0.005% to 0.3%, Li + Na + K + Cs: 0% to 20%, and F + Cl + Br + I: 0% to 20%. And this glass preferably has a glass transition point (Tg) of 140°C to 550°C. The transmissive member 20 more preferably has at least one of Si and Ge as a main component, and even more preferably has Si as a main component. When the transmissive member 20 has Si or Ge as a main component, an oxide layer of the main component (such as a silicon oxide layer or a germanium oxide layer) may be formed on the surface. Note that the main component in the present embodiment may refer to a content rate of 50% by mass or more with respect to the entire target member, preferably 70% by mass or more, and more preferably 90% by mass or more.

[0053] The transmissive member 20 may be coated on the surface 20A on the Z1 direction side or the surface 20B on the Z2 direction side. For example, an antireflection film may be provided on the surface 20A. As the antireflection film, an antireflection film of 3 to 12 layers is preferable, and the material is not particularly limited, but Ge, Si, ZnS, ZnSe, As ｘ , ｘ , ｙ , ｘ , ｙ , ｙ , ｘ , ｙ , ｘ , ｘ , ｘ , ｘ , ｘ S ｙ As ｘ Se ｙ 、metal oxides (Al ｘ O ｙ 、Bi ｘ O ｙ 、CeO ｘ 、CuO、HfO ｘ 、MgO、SiO、SiO ｘ 、NiO、TiO、TiO ｘ 、Ti ｘ O ｙ 、Y ｘ O ｙ 、ZrO ｘ), carbon hydride, diamond-like carbon (DLC), metal fluoride (MgF ｘ CaF ｘ SrF ｘ BaF ｘ PbF ｘ LaF ｘ YF ｘ ) is preferable (x, y are any positive numbers). The layer on the Z1 side of the anti-reflective coating is preferably a film with a Mohs hardness of 7 or higher and high far-infrared transmittance, from the viewpoint of scratch resistance. The layer on the Z1 side of the anti-reflective coating is ZrO ｘ It is particularly preferable that it be a membrane.

[0054] From the viewpoint of strength, the thickness of the permeable member 20 is preferably 1.0 mm or more, more preferably 1.5 mm or more, and even more preferably 2.0 mm or more. The upper limit of the thickness of the permeable member 20 is not particularly limited, but is usually 5.0 mm or less. Here, thickness refers to the length of the permeable member 20 in the Z direction.

[0055] (Frame Member) As shown in Figure 10, the frame member 30 is provided within the opening 19 of the glass member 10 and is a member that fixes the transparent member 20 within the opening 19. The frame member 30 will be described in detail below.

[0056] As shown in Figure 10, the frame member 30 has a wall portion 31, a fixing portion 32, and a support portion 33. The wall portion 31 is the portion provided between the inner circumferential surface of the opening 19 and the outer circumferential surface (end face) 21 of the transparent member 20. The fixing portion 32 is the portion that protrudes radially outward from the wall portion 31 and supports the surface 10B of the glass member 10 on the Z2 direction side. The support portion 33 is the portion that protrudes radially inward from the wall portion 31 and supports the surface 20B of the transparent member 20. The frame member 30 may be composed of a single member or of multiple members. A frame member 30 composed of multiple members may, for example, include a first member including the wall portion 31 and the support portion 33, and a second member including the fixing portion 32. A frame member 30 composed of multiple members may, for example, be composed of a first member on the Z1 direction side and a second member on the Z2 direction side. The frame member 30 may be composed of three or more members. In this embodiment, the frame member 30 is composed of a single member including a wall portion 31, a fixing portion 32, and a support portion 33.

[0057] The wall portion 31 is formed in a cylindrical shape that surrounds the outer circumferential surface 21 of the transparent member 20. In the radial direction, the wall portion 31 is positioned between the outer circumferential surface 21 of the transparent member 20 and the inner circumferential surface of the opening 19 of the glass member 10. Preferably, the length of the wall portion 31 in the Z direction, that is, the length in the Z direction from the end face 31A on the Z1 direction side to the end face 31B on the Z2 direction side of the wall portion 31, is greater than or equal to the total thickness of the glass member 10. Also, the end face 31A of the wall portion 31 is exposed on the Z1 direction side (outside the vehicle) within the opening 19.

[0058] The support portion 33 is formed to protrude radially inward from the inner circumferential surface of the wall portion 31. The support portion 33 is provided around the entire circumference of the inner circumferential surface of the wall portion 31, in other words, it is ring-shaped (flange-shaped). However, it is not limited to this, and the support portion 33 may be provided only in a portion of the inner circumferential surface of the wall portion 31, and multiple support portions 33 provided in a portion of the surface may be arranged in a circumferential direction.

[0059] The support portion 33 is located on the Z2 side of the end face 31A of the wall portion 31. In the example of Figure 10, the support portion 33 is located on the Z2 side of the end face 31A and on the Z1 side of the end face 31B. However, it is not limited to this, and the support portion 33 may be provided over the entire area of ​​the inner circumferential surface of the wall portion 31 on the Z2 side of the end face 31A. In this case, the Z2 side surface of the support portion 33 is at the same position as the end face 31B of the wall portion 31 in the Z direction.

[0060] The support portion 33 extends from the inner circumferential surface of the wall portion 31 to a point radially inward from the outer circumferential surface 21 of the transparent member 20. When the frame member 30 is attached to the transparent member 20, the support portion 33 is positioned on the Z2 direction side with respect to the surface 20B of the transparent member 20 and overlaps with the surface 20B in the Z direction. An adhesive layer 52 is provided between the support portion 33 and the surface 20B of the transparent member 20, and the support portion 33 is bonded to the surface 20B of the transparent member 20 via the adhesive layer 52.

[0061] The fixing portion 32 is formed to protrude radially outward from the outer circumferential surface of the wall portion 31. The fixing portion 32 is located on the Z2 side of the support portion 33; in other words, the fixing portion 32 protrudes radially outward from the Z2 side portion (the end face 31B portion) of the outer circumferential surface of the wall portion 31. The fixing portion 32 is provided around the entire circumference of the outer circumferential surface of the wall portion 31; in other words, it is ring-shaped (flange-shaped). However, it is not limited to this, and the fixing portion 32 may be provided only in a portion of the outer circumferential surface of the wall portion 31, and multiple fixing portions 32 provided in a portion of the surface may be arranged in the circumferential direction.

[0062] The fixing portion 32 extends from the outer peripheral surface of the wall portion 31 to radially outward from the inner peripheral surface of the opening 19 of the glass member 10. When the frame member 30 is attached to the glass member 10, the fixing portion 32 is positioned on the Z2 side relative to the Z2 side surface 10B of the glass member 10 (the surface 18B of the light-shielding layer 18 in the example of Figure 10), and overlaps with the surface 10B in the Z direction. An adhesive layer 50 is provided between the fixing portion 32 and the surface 10B of the glass member 10, and the fixing portion 32 is bonded to the surface 10B of the glass member 10 via the adhesive layer 50.

[0063] The constituent material of the frame member 30 is not particularly limited. At least a portion of the frame member 30 may be made of resins such as ABS (Acrylonitrile butadiene styrene) resin, AES (Acrylonitrile ethylene styrene) resin, rigid polyvinyl chloride (rigid PVC), polystyrene (PS), polyamide (PA), polycarbonate (PC), polyphenylene sulfide (PPS), and polytetrafluoroethylene (PTFE). When the frame member 30 is made of a thermoplastic resin such as ABS, AES, or rigid polyvinyl chloride, a molding method such as injection molding can be applied. At least a portion of the frame member 30 may be formed from an elastomer such as ethylene propylene monomer (EPDM), flexible polyvinyl chloride (flexible PVC), thermoplastic polyvinyl elastomer (TPVC), thermoplastic polyethylene elastomer (TPE), thermoplastic polyamide elastomer (TPAE), fluorinated ethylene propylene (FEP), vinylidene fluoride fluororubber (FKM), tetrafluoroethylene-purple vinyl ether fluororubber (FFKM), or silicone rubber. Here, FKM and FFKM are elastomers defined in ASTM:D1418. By using an elastomer as a constituent material of the frame member 30, the watertightness between the glass member 10 and the permeable member 20 can be improved.Furthermore, at least a portion of the frame member 30 may be formed from a fluororesin such as ETFE (Ethylene tetrafluoroethylene) or PFA (Perfluoroalkoxy alkanes). ETFE is a copolymer having units derived from ethylene and units derived from tetrafluoroethylene. ETFE may further contain units derived from a monomer having adhesive functional groups as a third component. PFA is a copolymer having units derived from tetrafluoroethylene and units derived from perfluoro(alkyl vinyl ether). PFA may further contain units derived from a monomer having adhesive functional groups as a third component. ETFE and PFA are preferred as constituent materials for the frame member 30 due to their excellent moldability, and the adhesion is further improved by including an adhesive third component. As the monomer having adhesive functional groups, monomers having carboxyl groups, acid anhydride groups, or carboxylic acid halide groups are preferred, and unsaturated dicarboxylic acid anhydrides are more preferred. Examples of unsaturated dicarboxylic acid anhydrides include itaconic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic acid anhydride (Hymic anhydride), and maleic anhydride. Monomers having adhesive functional groups may have one adhesive functional group alone or two or more. ETFE may optionally have units derived from ethylene, TFE, and other monomers other than monomers having adhesive functional groups. Examples of other monomers include fluoroolefins (excluding tetrafluoroethylene) and fluoro(alkyl vinyl ethers). PFA may optionally have units derived from TFE, perfluoro(alkyl vinyl ethers), and other monomers other than monomers having adhesive functional groups. Examples of other monomers include fluoroolefins (excluding tetrafluoroethylene). Furthermore, the frame member 30 is preferably black. This improves aesthetics.

[0064] The step difference (distance in the Z direction) between the end face 31A of the frame member 30 and the surface 20A of the transparent member 20 is preferably 0.3 mm or less, more preferably 0.2 mm or less, more preferably 0.15 mm or less, and even more preferably 0.1 mm or less. The step difference (distance in the Z direction) between the end face 31A of the frame member 30 and the surface 10A of the glass member 10 is preferably 1.0 mm or less, more preferably 0.5 mm or less, more preferably 0.3 mm or less, more preferably 0.15 mm or less, and even more preferably 0.1 mm or less. This makes it possible to suppress wear of the wiper when wiping the outer surface of the vehicle glass 1 with the wiper. The step difference can be measured, for example, by using a laser displacement meter (Keyence Corporation, in-line profile measuring instrument: LJ-X8200) to irradiate a laser into the area enclosed by a line segment 10 mm radially inward from the inner peripheral edge of the end face 31A of the frame member 30 and a line segment 10 mm radially outward from the outer peripheral edge of the end face 31A of the frame member 30, and then measuring the step difference profile obtained.

[0065] Furthermore, the adhesive layers 50 and 52 are layers composed of resin adhesives. The adhesive layers 50 and 52 are preferably cured urethane adhesives or modified silicone adhesives, and more preferably cured urethane adhesives. The constituent material of the adhesive layer 52 is not particularly limited. For example, the adhesive layer 52 is preferably cured urethane adhesive or modified silicone adhesive, and more preferably an adhesive that can be applied as a primer when integrally molding (insert molding) the permeable member 20 and the frame member 30. The adhesive layer 52 is even more preferably composed of a silane coupling agent. The silane coupling agent is a compound containing silicon and having an organic reaction site that reacts with an organic material and an inorganic reaction site that reacts with an inorganic material.

[0066] (Far-infrared transmission region) Next, the far-infrared transmission region B will be described. As shown in Figure 9, the far-infrared transmission region B is formed near the upper edge 1a of the vehicle glass 1 in the Y direction and near the center of the vehicle glass 1 in the X direction. The opening 19 and the transmission member 20 are formed near the upper edge 1a of the vehicle glass 1 in the Y direction and near the center of the vehicle glass 1 in the X direction.

[0067] As shown in Figure 10, the transmissive member 20 of the far-infrared transmission region B has a length DA of the longest straight line connecting any two points in the plane on the Z1 side that is 80 mm or less. The length DA is preferably 70 mm or less, more preferably 65 mm or less, and even more preferably 50 mm or less. The length DA is preferably 25 mm or more, more preferably 30 mm or more, and even more preferably 35 mm or more. The opening 19 of the far-infrared transmission region B preferably has a length DB of the longest straight line connecting any two points in the plane on the Z1 side that is 84 mm or less. The length DB is more preferably 74 mm or less, even more preferably 69 mm or less, and even more preferably 54 mm or less. The length DB is preferably 29 mm or more, more preferably 34 mm or more, and even more preferably 39 mm or more. By setting the length DA of the transparent member 20 and the length DB of the opening 19 within this range, it is possible to maintain the image quality of the far-infrared camera CA1 while suppressing a decrease in the strength of the vehicle glass 1 and suppressing the amount of transparency distortion around the opening 19. Furthermore, considering the expansion of each material within the operating temperature range, appropriate lengths DA and DB are determined so that distortion does not occur. In addition, a gap may be provided in advance as a countermeasure against distortion due to expansion. If the shape of the Z1-side surface of the transparent member 20 is circular, lengths DA and DB correspond to the diameter of the Z1-side surface. Here, lengths DA and DB refer to the lengths of the vehicle glass 1 when it is mounted on the vehicle V. For example, if the glass is bent to form the shape for mounting on the vehicle V, lengths DA and DB will be the lengths after bending. The same applies to the explanation of dimensions and positions other than lengths DA and DB unless otherwise specified.

[0068] (Visible Light Transmission Region) Next, the visible light transmission region C will be described. As shown in Figure 9, it is preferable that the visible light transmission region C be located near the far-infrared transmission region B. Specifically, the center of the far-infrared transmission region B as viewed from the Z direction is defined as the center point OB, and the center of the visible light transmission region C as viewed from the Z direction is defined as the center point OC. If the shortest distance between the far-infrared transmission region B (aperture 19) and the visible light transmission region C as viewed from the Z direction is defined as distance L, then it is preferable that distance L is greater than 0 mm and 100 mm or less, and more preferably 10 mm or more and 80 mm or less. By positioning the visible light transmission region C within this range relative to the far-infrared transmission region B, it is possible to capture images at close range with the far-infrared camera CA1 and the visible light camera CA2, while suppressing the amount of transmission distortion in the visible light transmission region C, and enabling the visible light camera CA2 to capture images appropriately. By capturing images of nearby locations with the far-infrared camera CA1 and the visible-light camera CA2, the processing load on the data obtained from each camera is reduced, and the routing of power and signal cables is also optimized.

[0069] It is preferable that the visible light transmission region C and the far-infrared transmission region B are located side by side in the X direction. That is, it is preferable that the visible light transmission region C is not located on the Y-direction side of the far-infrared transmission region B, but is aligned with the far-infrared transmission region B in the X direction. By arranging the visible light transmission region C side by side with the far-infrared transmission region B in the X direction, the visible light transmission region C can be positioned near the upper edge 1a. Therefore, the driver's field of view in the light-transmitting region A1 can be appropriately secured.

[0070] Preferably, the visible light transmission region C is located near the upper edge 1a in the Y direction and near the far infrared transmission region B in the X direction, similar to the far infrared transmission region B. By positioning the visible light transmission region C in this location, it is possible to capture images of close positions with the far infrared camera CA1 and the visible light camera CA2, while suppressing the amount of transmission distortion in the visible light transmission region C, allowing the visible light camera CA2 to capture images appropriately.

[0071] (Camera Unit Configuration) Next, the configuration of the camera unit 100, more specifically, an example of the configuration when the far-infrared camera CA1 is attached to the vehicle glass 1, will be described. Figure 12 is a diagram showing an example of the configuration when the far-infrared camera is attached to the vehicle glass.

[0072] As shown in Figure 12, the far-infrared camera CA1 is mounted on the vehicle glass 1 so as to be able to capture an external thermal image through the far-infrared transmission region B of the vehicle glass 1. The far-infrared camera CA1 is installed inside the vehicle V (inside the vehicle) at a position facing the far-infrared transmission region B. The type of far-infrared camera CA1 is not particularly limited, and any known far-infrared camera can be used. As shown in Figure 12, the far-infrared camera CA1 is mounted on the vehicle glass 1 by, for example, a bracket 40. The far-infrared camera CA1 is usually mounted so that the optical axis LX is approximately horizontal.

[0073] The visible light camera CA2 is mounted on the vehicle glass 1 so that it can capture images of the outside through the visible light transmission area C of the vehicle glass 1. The visible light camera CA2 is installed inside the vehicle V (inside the vehicle) at a position facing the visible light transmission area C. It is preferable that the visible light camera CA2 is mounted so that the optical axis LX of the far infrared camera CA1 and the optical axis of the visible light camera CA2 are approximately parallel. Approximately parallel is a concept that includes not only cases where these optical axes are perfectly parallel, but also cases where they are slightly deviated from parallel by an error margin. By doing so, the optical axis LX of the far infrared camera CA1 and the center of the field of view of the visible light camera CA2 almost coincide, which is preferable when combining images obtained from these cameras for information processing.

[0074] (Method for manufacturing vehicle glass) Next, a method for manufacturing vehicle glass 1 will be described. This manufacturing method includes the steps of forming an opening 19 at the position where the mark M of the glass member 10 is provided, and arranging a transparent member 20 (far-infrared transmitting unit U) inside the opening 19.

[0075] An example of the steps for forming the opening 19 is described below. Figure 13 is a schematic diagram showing an example of a method for forming the opening. In this example, as shown in step S20 of Figure 13, the glass member 10 is placed on the base T1 and fixed to the base T1. More specifically, the base T1 has an opening H that penetrates from one surface to the other. When viewed from the Z direction, the opening H is larger than the mark M and larger than the opening 19 to be formed in the glass member 10. The glass member 10 is fixed to the base T1 at a position where the mark M and the opening H overlap when viewed from the Z direction. In this embodiment, the glass member 10 is fixed to the base T1 such that the second mark M2 is inside the periphery of the opening H.

[0076] In the example shown in Figure 13, the glass member 10 is fixed to the base T1 with its surface 10B in contact with the surface of the base T1. However, if, for example, a mark M is provided on the surface 10B side as shown in Figure 7, it is preferable to fix the glass member 10 to the base T1 with its surface 10A in contact with the surface of the base T1.

[0077] Next, as shown in step S22, the glass member 10 fixed to the base T1 is imaged by the camera T2. In this step, the surface of the glass member 10 opposite to the base T1 (surface 10A in the collar of Figure 13) is illuminated with illumination light, and that surface is imaged by the camera T2. It is preferable that the optical axis of the illumination light coincides with the optical axis of the camera T2.

[0078] Next, the position of mark M is identified from the image of the glass member 10 captured by camera T2. Then, as shown in step S24, the processing machine T3 is used to process the glass member 10 fixed to the base T1, and as shown in step S26, an opening 19 is formed in the glass member 10 to obtain the glass member 10T. That is, the position of mark M is processed by the processing machine T3 to form an opening 19 at the position of mark M. In this step, the position to be processed on the glass member 10 is set based on the identified position of mark M, and the set position is processed by the processing machine T3 to form the opening 19. For example, in this step, the center position of the first mark M1 is set as the center position of the opening 19 to form the opening 19. In this step, it is preferable to finish the opening 19 by polishing the inside of the opening that has been penetrated by the processing machine T3 with a polishing machine.

[0079] The processing machine T3 may be any device capable of forming the opening 19, such as a core drill. In this step, it is preferable to process the glass member 10 with the processing machine T3 from both surfaces 10A and 10B. That is, it is preferable to form the opening 19 by connecting the opening processed by the processing machine T3 from surface 10A and the opening processed by the processing machine T3 from surface 10B.

[0080] (Effects) As described above, the glass member 10 according to the first aspect of this disclosure comprises a glass substrate, a light-shielding layer 18 provided on the surface of the glass substrate, and a mark M provided within the region (light-shielding region A2) where the light-shielding layer 18 is provided. The reflectance of visible light at the position where the mark M of the glass member 10 is provided is higher than the reflectance of visible light at the position where the light-shielding layer 18 of the glass member 10 is provided. According to this disclosure, since the opening 19 can be formed by alignment using the mark M, the actual position where the opening 19 is formed will not deviate from the position where the opening 19 is to be formed, and the opening 19 can be formed appropriately.

[0081] The glass member 10 according to the second aspect of this disclosure is the glass member 10 according to the first aspect, wherein the diameter of the smallest circle that encloses the entire mark M inside is 7 mm or more and 80 mm or less. Having the lower limit of the size of the mark M within this range allows for proper determination of the mark M's position and proper formation of the opening 19. Furthermore, having the upper limit of the size of the mark M within this range allows for proper removal of the mark M without it protruding from the opening 19 when forming the opening 19.

[0082] A glass member 10 according to a third aspect of this disclosure is the same as the glass member 10 according to the first aspect, wherein the mark M includes a first mark M1 indicating the position of an opening 19 to be formed in the glass member 10, and a second mark M2 surrounding the first mark M1. By forming such a mark M, alignment can be performed more appropriately, and the opening 19 can be formed appropriately.

[0083] The glass member 10 according to the fourth aspect of this disclosure is the glass member 10 according to any of the first to third aspects, wherein the light-shielding layer 18 is not provided at the position where the mark M is provided. By forming the mark M without providing the light-shielding layer 18, the mark M can be properly viewed and the opening 19 can be properly formed.

[0084] The glass member 10 according to the fifth aspect of this disclosure is the glass member 10 according to any of the first to fourth aspects, wherein within the area where the light-shielding layer 18 is provided, there is a visible light-transmitting area C that is larger in area than mark M and where the light-shielding layer 18 is not provided. According to this disclosure, by providing the visible light-transmitting area C, the visible light camera CA2 can be appropriately positioned.

[0085] The glass member 10 according to the sixth aspect of this disclosure is a glass member 10 according to any of the first to fifth aspects, wherein the glass member 10 is curved. According to this disclosure, an opening 19 can be appropriately formed in the curved glass member 10.

[0086] The glass member 10 according to the seventh aspect of this disclosure is a glass member 10 according to any of the first to sixth aspects, and is a laminated glass in which a first glass substrate 12 as a glass substrate, an intermediate layer 16, and a second glass substrate 14 as a glass substrate are laminated, and the light-shielding layer 18 and mark M are provided on the surface 12B of the first glass substrate 12 on the side of the intermediate layer 16. According to this disclosure, by providing the light-shielding layer 18 and mark M on the surface 12B, visible light can be shielded in the light-shielding region A2, and an opening 19 can be appropriately formed.

[0087] The glass member 10 according to the eighth aspect of this disclosure is a glass member 10 according to any of the first to seventh aspects, and is a laminated glass in which a first glass substrate 12 as a glass substrate, an intermediate layer 16, and a second glass substrate 14 as a glass substrate are laminated, and the light-shielding layer 18 and mark M are provided on the surface 14B of the second glass substrate 14 opposite to the intermediate layer 16. According to this disclosure, by providing the light-shielding layer 18 and mark M on the surface 14B, visible light can be shielded in the light-shielding region A2, and the opening 19 can be appropriately formed.

[0088] A method for manufacturing a glass member 10 according to a ninth aspect of this disclosure includes preparing a glass substrate, providing a light-shielding layer 18 on the surface of the glass substrate, and providing a mark M within the region where the light-shielding layer 18 is provided, with a visible light reflectivity higher than the position where the light-shielding layer 18 is provided, thereby obtaining the glass member 10. According to this disclosure, an opening 19 can be appropriately formed.

[0089] A method for manufacturing vehicle glass 1 according to the tenth aspect of this disclosure includes forming an opening 19 that penetrates from one surface 10A to the other surface 10B of the glass member 10 at a position where a mark M is provided on the glass member 10 of any of the first to eighth aspects, and arranging a transmissive member 20 that transmits far infrared rays within the opening 19. According to this disclosure, the opening 19 can be appropriately formed.

[0090] Although embodiments of the present invention have been described above, the embodiments are not limited to those described herein. Furthermore, the aforementioned components include those that can be easily conceived by those skilled in the art, those that are substantially the same, and those that fall within the so-called equivalent range. Moreover, the aforementioned components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the embodiments described above.

[0091] 1. Vehicle glass 10, 10T glass component 12. First glass substrate 14. Second glass substrate 16. Intermediate layer 18. Light-shielding layer 19. Opening 20. Transmitting member M mark

Claims

1. A glass member comprising: a glass substrate; a light-shielding layer provided on the surface of the glass substrate; and a mark provided within the region where the light-shielding layer is provided, wherein the reflectance of visible light at the location where the mark is provided on the glass member is higher than the reflectance of visible light at the location where the light-shielding layer is provided on the glass member.

2. The glass member according to claim 1, wherein the diameter of the smallest circle that encloses the entire mark inside is 7 mm or more and 80 mm or less.

3. The glass member according to claim 1 or claim 2, wherein the mark includes a first mark indicating the position of an opening to be formed in the glass member, and a second mark surrounding the first mark.

4. The glass member according to claim 1 or claim 2, wherein the light-shielding layer is not provided at the position where the mark is provided.

5. The glass member according to claim 4, wherein within the region where the light-shielding layer is provided, there is a visible light-transmitting region that is not provided with the light-shielding layer and has a larger area than the mark.

6. The glass member according to claim 1 or claim 2, wherein the glass member is curved.

7. A laminated glass comprising a first glass substrate as the glass substrate, an intermediate layer, and a second glass substrate as the glass substrate, wherein the light-shielding layer and the mark are provided on the surface of the first glass substrate on the intermediate layer side.

8. A laminated glass comprising a first glass substrate as the glass substrate, an intermediate layer, and a second glass substrate as the glass substrate, wherein the light-shielding layer and the mark are provided on the surface of the second glass substrate opposite to the intermediate layer, according to claim 1 or claim 2.

9. A method for manufacturing a glass member, comprising: preparing a glass substrate; providing a light-shielding layer on the surface of the glass substrate; and providing marks within the region where the light-shielding layer is provided, with a higher reflectivity of visible light than the position where the light-shielding layer is provided, thereby obtaining a glass member.

10. A method for manufacturing vehicle glass, comprising: forming an opening in the glass member according to claim 1 or claim 2 at the position where the mark is provided, the opening penetrating from one surface of the glass member to the other surface; and arranging a far-infrared-transmitting member within the opening.

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