Laminated glass
A laminated glass includes first and second glass plates to be arranged on a vehicle inner side and outer side, respectively; and an intermediate film positioned between the first and second glass plates and bonded to the glass plates. The laminated glass includes a first region, a transition region, and a second region, from a lower side of the laminated glass. Each of the first and second regions includes a region having a wedge-shaped cross section, in which an upper edge side thickness is greater than a lower edge side thickness, or having a thickness that is constant. The transition region connects the first and second regions, and includes a region having a wedge-shaped cross section, in which an upper edge side thickness is greater than a lower edge side thickness. At least one of the first and second regions includes a region used for a head up display.
1. A laminated glass, comprising:
a first glass plate to be arranged on an inner side of a vehicle;
a second glass plate to be arranged on an outer side of the vehicle; and
an intermediate film positioned between the first glass plate and the second glass plate and bonded to the first glass plate and to the second glass plate,
wherein the laminated glass includes a first region, a transition region, and a second region, from a lower side of the laminated glass when the laminated glass is attached to the vehicle,
the first region includes a region having a cross section having a shape of a wedge, in which a thickness of an upper edge side is greater than a thickness of a lower edge side when the laminated glass is attached to the vehicle,
the transition region is a region connecting the first region and the second region, and includes a region having a cross section having a shape of a wedge, in which a thickness of an upper edge side is greater than a thickness of a lower edge side when the laminated glass is attached to the vehicle,
the second region includes a region having a cross section having a shape of a wedge, in which a thickness of an upper edge side is greater than a thickness of a lower edge side when the laminated glass is attached to the vehicle,
each of the first region and the second region comprises a region for a head up display when the head up display is present,
in the first region, the transition region, and the second region, a difference between a maximum value and a minimum value of a wedge angle measured in a radial direction along the laminated glass is 0.05 mrad or more,
when a slope of the wedge angle in an intermediate region in which the maximum value and the minimum value are present is in mrad/mm, and a plate thickness of the first glass plate is t mm, conditions
0.3≤t≤1.6,
0.001≤|m|≤0.005, and
| m×t|≤ 0.008
are satisfied, and
in the first region and the second region, virtual images having different imaging distances are displayed, and
an average wedge angle in the first region is greater than an average wedge angle in the second region.
2. The laminated glass according to claim 1 ,
wherein a thickness of the transition region varies non-linearly and continuously.
3. The laminated glass according to claim 1 ,
wherein the plate thickness of the first glass plate is less than a plate thickness of the second glass plate.
4. The laminated glass according to claim 1 ,
wherein a radius of curvature of the laminated glass is 10000 mm or less.
5. The laminated glass according to claim 1 ,
wherein a maximum depth of curvature of the laminated glass is 10 mm or more.
6. The laminated glass according to claim 1 ,
wherein the intermediate film includes three or more layers.
7. The laminated glass according to claim 1 ,
wherein the imaging distance of either one of the first, region and the second region is less than 3 m, and the imaging distance of the other is greater than or equal to 3 m.
8. The laminated glass according to claim 1 ,
wherein the difference between the maximum value and the minimum value of the wedge angle measured in the radial direction along the laminated glass is 0.05 mrad or more but 1.5 mrad or less.
9. The laminated glass according to claim 1 ,
wherein a plate thickness of the second glass plate is 1.8 mm or more but 3 mm or less.
10. The laminated glass according to claim 1 ,
further comprising a shielding layer.