Abstract: An interferometric measuring device for recording the shape, the roughness or the clearance distance of the surface of a measured object is provided, the measuring device having a modulating interferometer, to which is supplied short-coherent radiation by a radiation source, and which has a first beam splitter for splitting the radiation supplied into a first beam component guided via a first arm, and into a second beam component guided via a second arm. One beam is shifted with respect to the other beam, with the aid of a modulating device, in terms of the beam's light phase or light frequency, and passes through a delay line. The two beams are subsequently combined at an additional beam splitter of the modulating interferometer.

Abstract: An interferometric measuring device for recording shape, roughness or separation distance of the surface of a measuring object, having a modulating interferometer, to which is supplied short coherent radiation by a radiation source, having a measuring probe that is spatially separated from the modulating interferometer and is coupled to it via a light-conducting fiber set-up, in which combined beam components are split in a common arm in a partially transmitting region into measuring and reference beams, and having receiver and evaluating devices for converting the supplied radiation into electrical signals and for evaluating the signals based on phase difference.

Abstract: A device for optically measuring bores in components, preferably injection bores in fuel injection valves, having a light source and an optical measuring instrument for optically detecting the geometry of the bore. The light source illuminates an opal solid body, which rests on the component on the end of the bore opposite the optical measuring instrument.

Abstract: An interferometric measuring device for recording the shape, the roughness or the clearance distance of the surface of a measured object is provided, the measuring device having a modulating interferometer, to which is supplied short-coherent radiation by a radiation source, and which has a first beam splitter for splitting the radiation supplied into a first beam component guided via a first arm, and into a second beam component guided via a second arm. One beam is shifted with respect to the other beam, with the aid of a modulating device, in terms of the beam's light phase or light frequency, and passes through a delay line. The two beams are subsequently combined at an additional beam splitter of the modulating interferometer.

Abstract: A method and a device for measuring at least one test surface and a reference test surface having an interference measuring probe which emits a first measuring beam which is aligned with respect to the reference test surface, are described. The measuring probe emits at least one second measuring beam, which is aligned with respect to at least the at least one test surface.

Abstract: An interferometric measuring device for recording shape, roughness or separation distance of the surface of a measuring object, having a modulating interferometer, to which is supplied short-coherent radiation by a radiation source, and having a first beam splitter for splitting the radiation supplied into first and second beam components guided respectively via first and second arms, of which the one is shifted as to the other with a modulating device in its light phase or light frequency, and passes through a delay line, and which are subsequently combined at an additional beam splitter of the modulating interferometer, having a measuring probe that is spatially separated from the modulating interferometer and is coupled/couple-able to it via a light-conducting fiber set-up, in which combined beam components are split in a common arm in a partially transmitting region into measuring and reference beams, and in which the measuring beam reflected at the surface and the reference beam reflected at a reference

Abstract: The invention relates to a device for keeping optical elements clean in motor vehicles, especially sensor or camera covers. This is done according to the present invention by applying a directed stream of gas, for example a stream of air, to the transparent cover in such a way that when the cover moves relative to the surroundings no ambient atmosphere, e.g., no ambient air, reaches the surface of the cover. According to one embodiment, by using a nozzle pressurized air is blown in, producing a transverse air stream. It is also possible, using a cover, to form a buffer space in front of the cover in addition to the transverse air stream. In a further refinement, a cleaning nozzle and a heater for the cover can be provided, in order to also be able to perform cleaning when soiling has occurred during stationary operation and to remove icing at low temperatures. To this end the cleaning fluid and/or the supplied air may also be pre-heated.

Abstract: A method and a device for measuring at least one test surface and a reference test surface having an interference measuring probe which emits a first measuring beam which is aligned with respect to the reference test surface, are described. The measuring probe emits at least one second measuring beam, which is aligned with respect to at least the at least one test surface.

Abstract: A device for optically measuring bores (7) in components (1), preferably injection bores (7) in fuel injection valves, having a light source (15) and an optical measuring instrument (20) for optically detecting the geometry of the bore (7). The light source (15) illuminates an opal solid body (10), which rests on the component (1) on the end of the bore (7) opposite the optical measuring instrument (20) (FIG. 1).

Abstract: The invention relates to a device for keeping optical elements (1) clean in motor vehicles, in particular sensor or camera covers. This is done according to the present invention by applying a directed stream of gas, in particular a stream of air (4), to the transparent cover (2) in such a way that when the cover moves (6) relative to the surroundings no ambient atmosphere (10), in particular no ambient air, reaches the surface (20) of the cover. According to one embodiment, using a nozzle (3) pressurized air (4) is blown in, producing a transverse air stream (9). It is also possible, using a cover, to form a buffer space in front of the cover in addition to the transverse air stream. In a further refinement, a cleaning nozzle and a heater for the cover can be provided, in order to also be able to perform cleaning when soiling has occurred during stationary operation and to remove icing at low temperatures. To this end the cleaning fluid and/or the supplied air may also be pre-heated.