Abstract: The present invention relates to an aqueous dental glass ionomer composition for use in the treatment of cavitated carious lesions, which composition comprises a water-soluble, polymerizable polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the polymerizable polymer has a polymer backbone and pendant groups having one or more polymerizable carbon-carbon double bonds. The dental glass ionomer composition is used as a permanent direct restoration.

Abstract: An electro-optic observation device, in particular a thermal imaging device, is provided. The electro-optic observation device includes a handheld device housing, a lens group arranged in the device housing on the entrance side, an image capture unit arranged in the device housing on the image side with respect to the lens group, an image display unit arranged in the device housing, an eyepiece arranged on the exit side with respect to the image display unit, and also a control device configured to control at least the image display unit depending on user-specifically variable parameters. In addition, the electro-optic observation device includes, as input means for varying the parameters, a rotary wheel accessible on the device housing for access by a user.

Abstract: An optical system (10) for use in an underwater environment is proposed, wherein the optical system (10) comprises a housing which delimits an interior (60) of the optical system (10) with respect to the surroundings (50) in water-tight fashion, and a lens (20) with an outer surface (24), wherein the housing comprises a mount (40), wherein the lens (20) is received in the mount (40) in such a way that the outer surface (24) of the lens (20) is in fluid contact with water of the underwater environment when the optical system (10) is situated in the underwater environment, wherein the outer surface (24) of the lens (20) has an arched form, in particular a convex form, preferably a spherical convex form, wherein the lens (20) has a first arched contact face (28), in particular a spherical contact face, and the mount (40) has a second contact face (48), wherein the lens (20) is arranged in the mount (40) in such a way that the first contact face (28) presses against the second contact face (48) when the pressure

Abstract: A steering assistance system for an agricultural vehicle includes a rigid axle on which steerable wheels are mounted and which is mounted so as to float relative to a supporting vehicle structure. The system includes a steering angle sensor for detecting a steering angle of the steerable wheels, a swing angle sensor for determining a swing angle of the rigid axle relative to the supporting vehicle structure, an actuating arrangement for influencing the steering angle, and a control unit that calculates a threshold value permissible for the steering angle depending on the detected swing angle. If the detected steering angle exceeds a tolerance range specified for the threshold value, the control unit executes steering interventions for reducing the steering angle by activating the actuating arrangement to satisfy the threshold value.

Abstract: A steering assistance system for an agricultural vehicle includes a rigid axle on which steerable wheels are mounted and which is mounted so as to float relative to a supporting vehicle structure. The system includes a steering angle sensor for detecting a steering angle of the steerable wheels, a swing angle sensor for determining a swing angle of the rigid axle relative to the supporting vehicle structure, an actuating arrangement for influencing the steering angle, and a control unit that calculates a threshold value permissible for the steering angle depending on the detected swing angle. If the detected steering angle exceeds a tolerance range specified for the threshold value, the control unit executes steering interventions for reducing the steering angle by activating the actuating arrangement to satisfy the threshold value.

Abstract: A system includes a first network with a first computer and a first release computer; a second network with a second computer and a second release computer; a perimeter network with a first data server and a second data server; wherein the first network and the second network connect via a firewall to the perimeter network; the first data server has a storage area accessible to the first computer and a storage area inaccessible to the first computer and the second computer; and the system is configured to carry out the method.

Abstract: A system includes a first network with a first computer and a first release computer; a second network with a second computer and a second release computer; a perimeter network with a first data server and a second data server; wherein the first network and the second network connect via a firewall to the perimeter network; the first data server has a storage area accessible to the first computer and a storage area inaccessible to the first computer and the second computer; and the system is configured to carry out the method.

Abstract: An interchangeable camera lens includes a main barrel for holding a diaphragm and optical elements, wherein the optical elements define an optical axis (A), a diaphragm rotating ring, rotatable by way of a rotational movement about the optical axis (A), for setting the diaphragm to different f-number values, and a click-stop device. The click-stop device interacts with the diaphragm rotating ring in such a way that the click-stop device is effective in an active work position and the diaphragm rotating ring is therefore rotatable in a stepped manner. The click-stop device is ineffective in an inactive work position and the diaphragm rotating ring is therefore continuously rotatable, wherein the click-stop device comprises a click-stop element seated on a pressure element. The click-stop element is pressable into click-stop grooves by the pressure of the pressure element to enable a step-wise rotation of the diaphragm rotating ring in the active work position.

Abstract: An interchangeable camera lens includes a main barrel for holding a diaphragm and optical elements, wherein the optical elements define an optical axis (A), a diaphragm rotating ring, rotatable by way of a rotational movement about the optical axis (A), for setting the diaphragm to different f-number values, and a click-stop device. The click-stop device interacts with the diaphragm rotating ring in such a way that the click-stop device is effective in an active work position and the diaphragm rotating ring is therefore rotatable in a stepped manner. The click-stop device is ineffective in an inactive work position and the diaphragm rotating ring is therefore continuously rotatable, wherein the click-stop device comprises a click-stop element seated on a pressure element. The click-stop element is pressable into click-stop grooves by the pressure of the pressure element to enable a step-wise rotation of the diaphragm rotating ring in the active work position.

Abstract: A camera lens assembly includes a focusing mount having a receiving lug and optical elements, which are arranged in the focusing mount, and define an optical axis. An adapter ring has a first planar surface and a second planar surface which are parallel to each other. The first planar surface is in contact engagement against a camera-side contact surface of the focus mount and the second planar surface is in contact with a lens-side contact surface of a lens mount. The lens mount has a tubular-shaped lens mount socket and lens mount attachment elements which are configured to coact with the camera mount attachment elements of a camera.

Abstract: The camera lens assembly (1) of the invention includes: (1) a focusing mount (2) having: (a) a defined distance from the camera-side contact surface (3) of the focusing mount (2) to the camera image plane (BE) of XAF-BE?57.

Abstract: A device for adjusting the back foci of an objective and a camera to one another has a housing by which a graphic pattern and an optics are mounted at a predetermined distance F? from each other. The temperature compensation for the distance F? is constant to ±2 mm for a temperature change of Delta 20° Celsius. The device also includes an apparatus for matching the back foci of an objective and a camera to each other, in which a housing has a fastening mechanism for fastening an object-side end of the objective and a graphic pattern is arranged in the housing on the end of the device opposite the fastening mechanism. The invention also includes a method for equalizing the back foci of an objective and camera using specific steps.

Abstract: An apparatus for the thermal compensation of an optical system is disclosed. The apparatus comprises a housing, at least one optical element adapted to be displaced relative to the housing, and at least one piston-and-cylinder unit positioned directly between the housing and the optical element. The piston-and-cylinder unit acts on the position of the optical element within the housing. It contains a fluid. The coefficients of volumetric thermal expansion of the piston, the cylinder and the fluid are selected such that for a predetermined change in temperature of the apparatus a defined relative displacement between the piston and the cylinder takes place which compensates the change of the optical properties of the optical system caused by the change in temperature. The fluid is a polymer system.

Abstract: There is provided a device for introducing an objective onto a camera. The device includes a base element and a bridge element, where the objective can be moved back and forth in a direction of the camera by the bridge element on the base element, and where a support element is disposed between the base element and the objective. There is also provided an apparatus for capturing images having a camera and an objective, where the apparatus includes the aforementioned a device.

Abstract: A manually controlled sensor for authenticity identification of luminescent identification features on documents is described, in which the identification feature is illuminated with an excitation wavelength and may respond at a different wavelength, with the response wavelength being detected and evaluated by a radiation receiver. In order to improve the sensitivity and to comply with the safety at work regulations, a focused beam (31, 32), which is emitted from a beam source (1), is converted by focusing optics (2, 3) in such a manner that a scanning bar (22), which is approximately in the form of a line, is projected on the surface of the object (5) to be investigated, which causes the identification region (21) which is arranged on the object (5) to fluoresce in a luminescent manner in at least one subregion, and the luminescence signal produced in this way is passed via detection optics (9, 9′, 10) to an evaluation unit (11), which evaluates the luminescence signal.

Abstract: An objective for a movie camera for digital cinematography comprises a cylindrical main barrel with a bayonet or K mount, an inner tube, fixed optical elements, adjustable optical sliding elements and drive rings with scales for adjusting the optical sliding elements that are mounted rotatably in the axial direction on the main barrel. The objective also comprises an iris diaphragm with a diaphragm ring rotating on the main barrel, an internal focusing system and a back focus correction device. The inner tube is mounted on the main barrel in a fashion displaceable along the optical axis for the purpose of back focus correction by means of the back focus correction device. The fixed optical elements, the iris diaphragm and sliding holders for holding the adjustable optical sliding elements are inserted into the inner tube.

Abstract: A device for adjusting the back foci of an objective and a camera to one another has a housing by which a graphic pattern and an optics are mounted at a predetermined distance F′ from each other. The temperature compensation for the distance F′ is constant to ±2 mm for a temperature change of Delta 20° Celsius. The device also includes an apparatus for matching the back foci of an objective and a camera to each other, in which a housing has a fastening mechanism for fastening an object-side end of the objective and a graphic pattern is arranged in the housing on the end of the device opposite the fastening mechanism. The invention also includes a method for equalizing the back foci of an objective and camera using specific steps.