Abstract: A device in accordance with the invention for transmitting data between a rotating part and a stationary part of a computer tomograph comprises at least two couplers and receivers connected therewith for receiving signals from a transmission conductor arrangement. Using an evaluation means, a signal is selected from signals received by the receiver on the basis of at least one given quality criterion.

Abstract: A device for transmitting data between a rotating part and a stationary part of a computer tomograph, in which the rotating part comprises at least one data source; a conductor structure; and at least one first transmitter for energizing the conductor structure; and the stationary part comprises at least one data sink for evaluating data; at least one receiver; and a receiver coupler for tapping off signals from the conductor structure and supplying the signals to the at least one receiver; is improved to reduce radiation of high-frequency signals.

Abstract: A device for non-contacting interrogation, without auxiliary power, of system states of a part that is rotatable relative to a fixed part comprises a coil on the rotatable part and a coil on the fixed part. The coils are mutually coupled, one being fed by a signal generator generating different frequencies, whilst the other coil is supplemented with at least one capacitance to form a resonance circuit. Further impedances can be added by means of switch elements to change a resonance frequency and form an interrogation circuit. By determining a resonance frequency on a signal generator side it is possible to draw conclusions about an impedance on an opposite side and to assign this to a switch element which is closed.

Abstract: A device for transmitting optical signals comprises two collimator units, supported to be rotatable relative to each other about a rotation axis and one derotating optical element. A first beam splitter receives input signals and splits them into at least two signals, so that they are transferred by at least two optical channels over the collimator units and the derotating optical element. After passing the second collimator unit, the signals are combined by a second beam splitter to a single signal, resulting in largely reduced variations of attenuation during rotation.

Abstract: An optical rotary joint comprises a first collimator arrangement for coupling-on first light-waveguides, and a second collimator arrangement for coupling-on second light waveguides, with the second collimator arrangement being supported to be rotatable relative to the first collimator arrangement about a rotation axis. At least one derotating optical element is provided in the light path between the first collimator arrangement and the second collimator arrangement. At least one collimator arrangement comprises a rod-shaped lens that is fastened on a support plate so that the axis of the lens is tilted at a given angle relative to the rotation axis of the rotary joint.

Abstract: An optical transmission system in a computer tomograph for transmitting modulated optical signals between a first unit and a second unit, the first unit being supported to be rotatable relative to the second unit, comprises: a light guide disposed along a circular or annular track on the first unit; at least one first light coupler connected with the light guide for coupling light into or out of the light guide; at least one second light coupler disposed on the second unit to be movable relative to the light guide for coupling light into or out of the light guide. In order to remove from the light guide surface any contaminating matter that would lead to a high signal attenuation or an interference with transmission, a cleaning unit is provided for removing dirt and dust particles. Furthermore, a sealing of the system is provided by applying, amongst other means, pressurized air or electrostatic filtering.

Abstract: An optical two-channel rotary joint that is also suitable for coupling of single-mode fibers comprises two housing parts that are rotatable relative to each other. Each of these housing parts accommodates a light-waveguide for supplying light and a light-waveguide for withdrawing light. The arrangement has two optical paths adapted to operate in opposite directions, with each light-waveguide for supplying light being coupled with a light-waveguide for withdrawing light via an added biconvex lens. Furthermore, one focuser is disposed on each of the light-waveguides for supplying light, which focuses the light of the light-waveguide onto the corresponding light-waveguide for withdrawing light.

Abstract: An optical two-channel rotary joint that is also suitable for coupling of single-mode fibers comprises two housing parts that are rotatable relative to each other. Each of these housing parts accommodates a light-waveguide for supplying light and a light-waveguide for withdrawing light. The arrangement has two optical paths adapted to operate in opposite directions, with each light-waveguide for supplying light being coupled with a light-waveguide for withdrawing light. Furthermore, one focuser is disposed on each of the light-waveguides for supplying light, which focuses the light of the light-waveguide for supplying light onto the corresponding light-waveguide for withdrawing light.

Abstract: A device for receiving digital signals comprising at least one receiving antenna, a measuring means for determining parameters of relevance to signal quality, a digitizer, and a signal-processing unit. The signal-processing unit is controlled to optimize the reception of the digital signals on the basis of the parameters determined by the measuring means. A signal-processing unit processes signals from the receiving antenna and a digitizer converts the processed signals so that the converted processed signals can be measured to determine their relevance signal quality; a transmitter conductor array coupled to the receiving unit can be controlled therefrom. Controlling the signal quality occurs using a dielectric or ferromagnetic materials, impedance elements, or actuators between the receiving antenna and the transmitter conductor array.

Abstract: A slide track mounting or a contact brush mounting for a sliding contact assembly comprises insulators having a surface structure that is a combined microstructure and nanostructure. Thereby an accumulation of dirt and abraded particles from contact brushes on the insulators is substantially reduced. This allows creep paths to be shortened and periods between maintenance operations for cleaning to be prolonged.

Abstract: A device for transmitting modulated optical signals between a first unit and a second unit, in which the first unit is supported to be rotatable relative to the second unit, comprises a light guide along a circular track on the first unit, a first light coupler for coupling light into or out of the light guide, and a second light coupler disposed on the second unit and movable relative to the light guide, for coupling light into or out of the light guide. A coupling of light into the light guide is effected by means of a beam splitters and a light deflecting means.

Abstract: A sliding contact assembly comprises: at least one contact slide track; a brush holder for holding at least one brush contact member and maintaining the at least one brush contact member in sliding contact with the at least one contact slide track during relative movement between the brush contact member and the contact slide track; and a collecting container disposed to collect particles of abraded material from the at least one brush contact member; wherein a cover is provided to surround substantially the brush holder and the at least one brush contact member, the cover having walls extending along a direction of the contact slide track laterally of the brush holder and the brush contact member and along a side of the brush holder remote from the contact slide track; the collecting container is disposed at a downstream end of the cover; and the cover is designed to channel a stream of air, generated within the cover by movement of the contact slide track, towards the collecting container.

Abstract: An optical rotary joint comprises means for coupling-in or coupling-out light, and an optical derotating system. The derotating system may be a Dove prism or an Abbe-Koenig prism. In order to improve reflection at a reflecting face or faces of the derotating element, the reflecting faces are coated with an optically transparent material having a refractive index that is lower than the refractive index of the derotating element. In an embodiment the derotating optical element comprises a Dove prism. Light entry and light exit faces of the Dove prism are provided with optical supplementary elements that have an optical index of refraction greater than an optical index of refraction of the Dove prism.

Abstract: The invention relates to an inductive rotary joint having at least two component parts which each comprise a coil for introducing power and/or taking-up power. In order that the rotary joint may be able to withstand even high mechanical load, at least one of the component parts is made of a synthetic resin containing soft magnetic particles, and the coil of the one part is at least partially located in the synthetic resin.

Abstract: A device in accordance with the invention for transmitting data between a rotating part and a stationary part of a computer tomograph comprises at least two couplers and receivers connected therewith for receiving signals from a transmission conductor arrangement. Using an evaluation means, a signal is selected from signals received by the receiver on the basis of at least one given quality criterion.

Abstract: A rotating data transmission device for transmitting data from a data source to a data sink between a rotating part and a stationary part comprises a transmitting conductor arrangement fed by a transmitting means, and also a receiving means for tapping signals from the transmitting conductor arrangement with the aid of a receiving coupler arrangement. A control unit controls the data source or the transmitting means so that a specific resynchronization signal is emitted in the case of an interference with reception, or an unlocking of the PLL of the receiving means.

Abstract: The invention relates to a method for adjusting an optical rotating data transmission device having two units that are rotatable with respect to each other about a rotation axis, and that each have a coaxial collimator for coupling light in or out, and relates also to an optical rotating data transmission device that is adjustable by means of the method. For an adjustment, a deviation of a light beam from the rotation axis is determined by means of two detectors at different distances, and from this a positional deviation and also a tilt of the light beam is calculated and suitably compensated.

Abstract: A phantom for examination in nuclear spin tomographs comprises at least one test body for abstract imitation of a human or animal body part, and also means for supplying the test body with a liquid during the examination by nuclear spin tomography. Another phantom for examination in nuclear spin tomographs comprises at least one abstract imitation of a human or animal body part, of which at least one abstract imitation is adapted to be an at least partially flexible test body, and a flexible layer surrounding the partially flexible test body to imitate a lipid layer. Methods for producing test bodies include molding the test bodies from plastic material.

Abstract: Digital signal transmitter devices mostly present a distinct wide-band interference spectrum which renders compliance with the presently applicable EMC standards substantially more difficult. Available provisions for improving the EMC characteristics take an influence on the quality in transmission and on the immunity to interference. By the inventive method the carrier signal or output signal, respectively, of the transmitter is so modulated that the narrow spectral lines are spread and the spectral power density is reduced.

Abstract: A device for receiving digita1 signals comprising at least one receiving antenna for receiving signals, a measuring means for determining parameters of relevance to signal quality of signals received by the antenna, and a digitizer for the signals received by the antenna. The digitizer is controlled to optimize reception of the signals on the basis of the parameters determined by the measuring means.