Abstract: A windshield according to the present invention includes a first glass plate that includes a first surface and a second surface, a second glass plate that includes a first surface and a second surface and is arranged such that the first surface of the second glass plate faces the second surface of the first glass plate, and an intermediate film that is sandwiched between the first glass plate and the second glass plate. The first glass plate includes a first end portion and a second end portion that is opposite to the first end portion, and a thickness of the first glass plate decreases from the first end portion toward the second end portion. In the first glass plate, a surface compressive stress on the first end portion side is higher than a surface compressive stress on the second end portion side.

Abstract: A laminated glass according to the present invention includes an outer glass sheet, an inner glass sheet that is arranged opposite to the outer glass sheet and has a smaller thickness than that of the outer glass sheet, and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. A transmittance with respect to light having a wavelength of 850 to 950 nm is 30 to 80%. The outer glass sheet has a thickness of 1.8 to 2.3 mm. The inner glass sheet has a thickness of 0.6 to 2.0 mm. The interlayer includes a plurality of layers including at least a core layer. The core layer has a Young's modulus of 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20° C., the Young's modulus being lower than the Young's modulus of the other layer.

Abstract: A windshield according to the present invention includes a first glass plate that includes a first surface and a second surface, a second glass plate that includes a first surface and a second surface and is arranged such that the first surface of the second glass plate faces the second surface of the first glass plate, and an intermediate film that is sandwiched between the first glass plate and the second glass plate. The first glass plate includes a first end portion and a second end portion that is opposite to the first end portion, and a thickness of the first glass plate decreases from the first end portion toward the second end portion. In the first glass plate, a surface compressive stress on the first end portion side is higher than a surface compressive stress on the second end portion side.

Abstract: A laminated glass according to the present invention includes an outer glass sheet, an inner glass sheet that is arranged opposite to the outer glass sheet and has a smaller thickness than that of the outer glass sheet, and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. A transmittance with respect to light having a wavelength of 850 to 950 nm is 30 to 80%. The outer glass sheet has a thickness of 1.8 to 2.3 mm. The inner glass sheet has a thickness of 0.6 to 2.0 mm. The interlayer includes a plurality of layers including at least a core layer. The core layer has a Young's modulus of 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20° C., the Young's modulus being lower than the Young's modulus of the other layer.

Abstract: The present invention provides a windshield that has a display region onto which information is projected using light emitted from a head-up display device, the windshield including an outer glass plate, an inner glass plate that is arranged opposite to the outer glass plate, and an interlayer that is arranged between the outer glass plate and the inner glass plate, wherein lattice points are defined at a pitch of no greater than 20 mm in the display region, and when wedge angles at the lattice points are measured using an interferometer with 240×240 pixels or more, a difference between the largest value and the smallest value of the wedge angles is no greater than 0.32 mrad.

Abstract: A laminated glass according to the present invention includes an outer glass sheet, an inner glass sheet that is arranged opposite to the outer glass sheet and has a smaller thickness than that of the outer glass sheet, and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. A transmittance with respect to light having a wavelength of 850 to 950 nm is 30 to 80%. The outer glass sheet has a thickness of 1.8 to 2.3 mm. The inner glass sheet has a thickness of 0.6 to 2.0 mm. The interlayer includes a plurality of layers including at least a core layer. The core layer has a Young's modulus of 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20° C., the Young's modulus being lower than the Young's modulus of the other layer.

Abstract: A windshield according to the present invention is a windshield to which an information acquisition device that emits and/or receives light to acquire information from an outside of a vehicle can be attached, and that includes a glass sheet, and a mask layer that is formed on the glass sheet and blocks a visual field from the outside of the vehicle, and at least one opening is formed in the mask layer. The glass sheet and the mask layer have different heat shrinkage percentages and are molded together by being heated. The information acquisition device is configured to be capable of using the information while reducing an influence of distortion that occurs in a predetermined range from an inner peripheral edge of the opening toward a center of the opening due to the molding.

Abstract: A laminated glass according to the present invention includes an outer glass sheet, an inner glass sheet that is arranged opposite to the outer glass sheet and has a smaller thickness than that of the outer glass sheet, and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. A transmittance with respect to light having a wavelength of 850 to 950 nm is 30 to 80%. The outer glass sheet has a thickness of 1.8 to 2.3 mm. The inner glass sheet has a thickness of 0.6 to 2.0 mm. The interlayer includes a plurality of layers including at least a core layer. The core layer has a Young's modulus of 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20° C., the Young's modulus being lower than the Young's modulus of the other layer.

Abstract: The present invention provides a laminated glass to be used in a windshield of an automobile, and the laminated glass includes: an outer glass sheet; an inner glass sheet arranged opposite to the outer glass sheet, the inner glass sheet having a smaller thickness than that of the outer glass sheet; and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. The interlayer includes at least a core layer and a pair of outer layers between which the core layer is sandwiched, the outer layers having a higher rigidity than that of the core layer. An attachment angle to the vertical with respect to the automobile is 45 degrees or more. The core layer has a Young's modulus of 1 to 25 MPa at a frequency of 100 Hz and a temperature of 20° C.

Abstract: A laminated glass according to the present invention includes an outer glass sheet, an inner glass sheet that is arranged opposite to the outer glass sheet and has a smaller thickness than that of the outer glass sheet, and an interlayer sandwiched between the outer glass sheet and the inner glass sheet. A transmittance with respect to light having a wavelength of 850 to 950 nm is 30 to 80%. The outer glass sheet has a thickness of 1.8 to 2.3 mm. The inner glass sheet has a thickness of 0.6 to 2.0 mm. The interlayer includes a plurality of layers including at least a core layer. The core layer has a Young's modulus of 1 to 20 MPa at a frequency of 100 Hz and a temperature of 20° C., the Young's modulus being lower than the Young's modulus of the other layer.

Abstract: A windshield according to the present invention is a windshield to which an information acquisition device that emits and/or receives light to acquire information from an outside of a vehicle can be attached, and that includes a glass sheet, and a mask layer that is formed on the glass sheet and blocks a visual field from the outside of the vehicle, and at least one opening is formed in the mask layer. The glass sheet and the mask layer have different heat shrinkage percentages and are molded together by being heated. The information acquisition device is configured to be capable of using the information while reducing an influence of distortion that occurs in a predetermined range from an inner peripheral edge of the opening toward a center of the opening due to the molding.

Abstract: A method for producing a glass plate according to the present invention includes: a conveying-in step of conveying a heated glass plate into a molding apparatus; a first molding step of molding the glass plate in a state where at least part of a peripheral edge portion of at least one of an upper face and a lower face of the glass plate is free from contact; a separating step of separating at least a region molded in the first molding step, of the glass plate, from any mold that the region was in contact with; a second molding step of molding a region including at least part of the peripheral edge portion of the glass plate; and a conveying-out step of conveying the glass plate subjected to the second molding step, out of the molding apparatus.

Abstract: A method for detecting a flaw accompanied with an optical defect if any on or in a sheet-like transparent body which is moved, and determine its type comprises placing an illuminator on one side of a sheet-like transparent body, and placing a (one-dimensional) image pickup on the opposite side. The illuminator means comprises lighting and darkening portions, and the image pickup is placed relative to the illuminator such that the boundary between the portions appears on the image pickup as a straight line in parallel with the long axis of the pickup. Image data created from the image pickup, are subjected to contrast enhancement to provide contrast enhanced image data which are displayed as a contrast enhanced image. The sequence (flaw pattern) of light spots and dark spots appears in the enhanced image as of the sheet-like transparent body is moved, and determines the type of flaw.

Abstract: There is provided a method by which one can detect a flaw accompanied with an optical defect if any on or in a sheet-like transparent body which is moved, and determine its type. The flaw detection method comprises the steps of placing an illuminating means on one side of a sheet-like transparent body, and placing a linearly extended (one-dimensional) image pickup means on the opposite side of the sheet-like transparent body. The illuminating means comprises a lighting portion and darkening portion, and the image pickup means is placed with respect to the illuminating means such that an image of the boundary between the lighting and darkening portions appears on the image pickup means as a straight line in parallel with the long axis of said means, and forms a visual field of said means.