Abstract:
A method for measuring blowing structures of a prestressed disc is described. The method has the steps of: (a) irradiating at least one analysis area of the disc with linearly polarized light from a radiation source at an angle of incidence and recording an image at least of the analysis area at an angle of observation using at least one detector, (b) supplying the image to an evaluation unit, and (c) using the evaluation unit to read a brightness profile along an analysis line on the image, to determine the local maxima and the local minima of the brightness profile, and to determine an intensity index by means of the difference between a brightness mean of the local maxima and a brightness mean of the local minima.
Abstract:
A method for measuring blowing structures of a prestressed disc is described. The method has the steps of: (a) irradiating at least one analysis area of the disc with linearly polarized light from a radiation source at an angle of incidence and recording an image at least of the analysis area at an angle of observation using at least one detector, (b) supplying the image to an evaluation unit, and (c) using the evaluation unit to read a brightness profile along an analysis line on the image, to determine the local maxima and the local minima of the brightness profile, and to determine an intensity index by means of the difference between a brightness mean of the local maxima and a brightness mean of the local minima.
Abstract:
A projection arrangement for a head-up display (HUD) is presented. The arrangement has a vehicle windshield that includes an outer pane and an inner pane bonded to one another via a thermoplastic intermediate layer. The vehicle windshield has an upper edge, a lower edge, and an HUD region. The thickness of the thermoplastic intermediate layer in the vertical course between the upper edge and the lower edge varies, at least in the HUD region, according to a wedge angle. The arrangement also has a projector that is aimed at the HUD region to generate a virtual image at a projection distance of at least 5 m. According to one aspect, a vertical radius of curvature in the HUD region is at least 6 m and a maximum value of the wedge angle is less than or equal to 0.3 mrad.
Abstract:
A laminated glazing includes at least one outer glass sheet, an inner glass sheet and a polymeric insert located between the two glass sheets, in which the inner sheet has a thickness of not more than 1.5 mm, the outer glass sheet is a glass sheet of different chemical composition from that of the inner sheet, the difference between the temperatures Tp1 and Tp2 being less than 80° C., the temperature Tp1 being defined as the mean between the upper annealing temperature and the softening point of the outer glass sheet and the temperature Tp2 being defined as the mean between the upper annealing temperature and the softening point of the inner glass sheet.
Abstract:
A composite glass for a head-up display is described. The composite glass has an outer pane made of glass and an inner pane made of glass, which are bonded to one another via a thermoplastic intermediate layer. The inner pane has a thickness less than 1.2 mm, and the thickness of the intermediate layer in the vertical course between a lower edge and an upper edge of the composite glass is variable at least in sections with a maximum wedge angle less than or equal to 0.3 mrad.
Abstract:
A laminated glazing includes at least one outer glass sheet and a polymeric sheet, in which the outer glass sheet has a thickness of not more than 2 mm and a coefficient of thermal expansion of less than 70×10−7 K−1.