Robert Boschgmbh

Other

Dominique Breider

Dominique Marchal

Marc-Henri Duvoisin

Pawel Drabarek

Dieter Hoetzer

Vincent Thominet

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. A measuring probe that is spatially separated from the modulating interferometer is coupled to it or able to be coupled to it via a light-conducting fiber set-up, in which probe the combined beam components are split into a measuring beam guided to the surface by a probe-optical fiber unit having a slantwise exit surface on the object side and a reference beam. An accurate surface measurement is facilitated by the angle of inclination of the exit surface to the normal of the optical probe axis amounting to at least 46&#xb0;.

Interferometric measuring device

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. A construction for reliable measurements even in tight hollow spaces provides that the partially transmitting region is formed by a slanting exit face of a probe fiber at an exit angle as to the optical probe axis and a likewise slanting entrance face, of a fiber section following on the object side, as to the optical probe axis at an entrance angle, a wedge-shaped gap being formed between the exit and entrance surfaces.

Interferometric measuring device utilizing a slanted probe filter

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.

Device for optically measuring boreholes

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.

Interference measuring probe

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.

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Lonay, Switzerland

Dominique Breider