Abstract: A head-up display (HUD), includes an imaging unit, an optical element, which is suitable for deflecting the radiation of the imaging unit in the direction of a windshield and thereby irradiating an HUD region of the windshield in order to generate a virtual image, a positioning device, which is suitable for fixing the windshield in a defined arrangement relative to the optical element, and a camera unit, which is suitable for capturing the virtual image through the windshield from different eye positions, wherein the optical element is configured such that the entire virtual image lies within the depth of field range of the camera unit.

Abstract: A vehicle window unit that includes side curved regions that are arranged, in the installed state, near a, in particular standing, pillar of the vehicle body, wherein the curved regions are at least partially coloured in a transmittance reducing manner. The degree of colouration correlates with the degree of curvature.

Abstract: A method for operating a clutch of a drive train of a vehicle wherein the clutch, a drive motor primary axis having first wheels that can be driven by the drive motor as first axis and a second axis having second wheels are driven by the drive motor via the clutch as second axis, with the clutch being adjusted between a closed position, wherein a first coupling torque of the clutch is set, and at least one second position differing from the closed position, wherein a second coupling torque of the clutch that is lower than the first coupling torque is set: determining at least one coefficient of friction of a roadway the vehicle is located on; and as a factor of the determined coefficient of friction: adjusting a basic torque of the clutch, with the clutch being prestressed in the second position by the basic torque.

Abstract: An HUD system, includes at least one first HUD device, namely an AR-HUD device, with at least one first image source for displaying a first image produced by at least one hologram in a first display section of a display region and at least one second HUD device with at least one second image source for displaying a second image produced using geometric projection optics in a second display section of the display region.

Abstract: A method for operating a clutch of a drive train of a vehicle wherein the clutch, a drive motor primary axis having first wheels that can be driven by the drive motor as first axis and a second axis having second wheels are driven by the drive motor via the clutch as second axis, with the clutch being adjusted between a closed position, wherein a first coupling torque of the clutch is set, and at least one second position differing from the closed position, wherein a second coupling torque of the clutch that is lower than the first coupling torque is set: determining at least one coefficient of friction of a roadway the vehicle is located on; and as a factor of the determined coefficient of friction: adjusting a basic torque of the clutch, with the clutch being prestressed in the second position by the basic torque.

Abstract: A head-up display (HUD), includes an imaging unit, an optical element, which is suitable for deflecting the radiation of the imaging unit in the direction of a windshield and thereby irradiating an HUD region of the windshield in order to generate a virtual image, a positioning device, which is suitable for fixing the windshield in a defined arrangement relative to the optical element, and a camera unit, which is suitable for capturing the virtual image through the windshield from different eye positions, wherein the optical element is configured such that the entire virtual image lies within the depth of field range of the camera unit.

Abstract: Thermoplastic film suitable as an intermediate layer for a laminated glass pane, wherein the thermoplastic film includes a defined region, which is provided for a camera window or an HUD (head-up display) region that has a non-zero wedge angle, and a region surrounding the defined region on all sides, in which the thermoplastic film has a substantially constant thickness, wherein the maximum thickness in the defined region of the thermoplastic film is less than the thickness in the surrounding region.

Abstract: A method for producing a thermoplastic combination film suitable for a composite glass pane, wherein the thermoplastic combination film includes at least one defined area, which is provided for a camera window or an HUD (head-up display) region that has a variable wedge angle, the method including providing a first thermoplastic film, producing a second thermoplastic film with a variable wedge angle, wherein the three-dimensional shape of second thermoplastic film is obtained by molding on a mold, and joining together the first thermoplastic film and the second thermoplastic film.

Abstract: A method for determining pane thicknesses and a wedge angle of a coated windshield for a projection arrangement of a head-up display. A wedge angle and a combination of glass thicknesses are determined by means of which the glass ghost image and the layer ghost image are optimally reduced. The method proceeds from a starting thickness of the two glass panes of the windshield for which that wedge angle is determined, in an iterative process, that represents an optimal compromise between the minimization of the glass ghost image and the minimization of the layer ghost image. Then, the glass thicknesses are determined varied within a specified range for each combination of the optimal wedge angles. Thus, it is possible, iteratively, to identify that combination of glass thicknesses that results in the least occurrence of ghost images, in addition to the associated optimal wedge angle.

Abstract: A method for producing a composite pane suitable as a projection surface of a projection assembly, wherein (a) a polarisation-selective coating is provided on a carrier film; (b) the polarisation-selective coating is transferred from the carrier film onto a laminating film, by (i) arranging the carrier film and the laminating film areally one atop the other with the coating positioned therebetween to form a film stack, (ii) treating the film stack for at least 2 hours at a pressure of at least 8 bar and a temperature of 80° C. to 120° C. in an autoclave, and (iii) peeling the carrier film off the laminating film, with the coating remaining on the laminating film; (c) the laminating film is arranged areally between a first pane and a second pane; and (d) the first pane is laminated with the second pane via the laminating film to form the composite pane.

Abstract: A vehicle window unit that includes side curved regions that are arranged, in the installed state, near a, in particular standing, pillar of the vehicle body, wherein the curved regions are at least partially coloured in a transmittance reducing manner. The degree of colouration correlates with the degree of curvature.

Abstract: A vehicle composite pane having an outer pane made of glass and an inner pane made of glass that are bonded to one another via a polymeric intermediate layer is presented. According to one aspect, the intermediate layer includes a first wedge inlay and a second wedge inlay that are made of different materials, each of the inlays being wedge-shaped and having a wedge face. According to another aspect, the wedge faces are positioned one atop the other so that, in the direction from a lower edge to an upper edge of the composite pane, the thickness of the first wedge inlay increases and the thickness of the second wedge inlay decreases. According to a further aspect, at least one of the wedge inlays has a refractive index that differs from the refractive index of the outer pane and of the inner pane.

Abstract: A method for producing a thermoplastic combination film suitable for a composite glass pane, wherein the thermoplastic combination film includes at least one defined area, which is provided for a camera window or an HUD (head-up display) region that has a variable wedge angle, the method including providing a first thermoplastic film, producing a second thermoplastic film with a variable wedge angle, wherein the three-dimensional shape of second thermoplastic film is obtained by molding on a mold, and joining together the first thermoplastic film and the second thermoplastic film.

Abstract: A head-up display system for representing image information for an observer includes an image encoder for emitting a first image, a projection area including a portion of a composite pane for deflecting a projection of an image, wherein a calibration system is arranged to ascertain a deviation between a first image and the projection of the first image and has a capturing system arranged to capture reflection properties of the composite pane and the image encoder is arranged to generate a correction image as a function of the deviation.

Abstract: A vehicle window for separating a vehicle interior from outer surroundings, includes glass pane with a light guide body made of glass on a region of the interior-side surface of the glass pane, wherein the surface of the light guide body facing the glass pane and the surface facing away from the glass pane enclose a wedge angle such that the thickness of the light guide body decreases in the direction from a lower edge to an upper edge of the glass pane, wherein the light guide body is secured to the interior-side surface of the glass pane by means of laser welding.

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 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 arrangement also has a projector that is aimed at the HUD region to generate a virtual image perceivable by an observer situated within an eyebox. According to one aspect, the windshield has an HUD reference point, at which a central beam running between the projector and the center of the eyebox strikes the inner pane. According to another aspect, the thickness of the thermoplastic intermediate layer in the vertical course between the upper edge and the lower edge in at least a section corresponding to the HUD region is variable according to a wedge angle.

Abstract: Thermoplastic film suitable as an intermediate layer for a laminated glass pane, wherein the thermoplastic film includes a defined region, which is provided for a camera window or an HUD (head-up display) region that has a non-zero wedge angle, and a region surrounding the defined region on all sides, in which the thermoplastic film has a substantially constant thickness, wherein the maximum thickness in the defined region of the thermoplastic film is less than the thickness in the surrounding region.

Abstract: An HUD system, includes at least one first HUD device, namely an AR-HUD device, with at least one first image source for displaying a first image produced by at least one hologram in a first display section of a display region and at least one second HUD device with at least one second image source for displaying a second image produced using geometric projection optics in a second display section of the display region.

Abstract: The invention relates to a process for the preparation of a quartz glass grain comprising the process steps i.) Providing a silicon dioxide granulate from a pyrogenically produced silicon dioxide powder, ii.) Making a glass melt out of silicon dioxide granulate, iii.) Making a quartz glass body out of at least part of the glass melt and iv.) Reducing the size of the quartz glass body to obtain the quartz glass grain. The invention further relates to a quartz glass grain which is obtainable by this process. The invention further relates to opaque quartz glass bodies, which are obtainable by further processing of the quartz glass grain.