Abstract: A device for laser projection comprises a first laser diode configured to emit a first linearly polarized laser beam extending along a first polarization axis and a second laser diode configured to emit a second linearly polarized laser beam extending along a second polarization axis that is perpendicular to the first polarization axis. A polarization combiner is configured to combine the first and second linearly polarizing laser beams into a combined laser beam, wherein the combined laser beam comprises one of: (1) circular polarization; and (2) elliptical polarization. A measuring device is configured to measure an intensity of the combined laser beam. A control unit is configured to receive the measured intensity of the combined laser beam and is further configured to adjust an intensity of at least one of: (1) the first laser diode; and (2) the second laser diode.

Abstract: A method for validating the axis linearity of a displacement mechanism for a radiation detector configured to detect high-energy radiation emitted by an irradiation device comprises providing a container configured to receive a liquid. A tactile sensor and a standard element are positioned within the container configured for receiving the liquid. A displacement mechanism is structured to displace at least one of: (1) the tactile sensor; and (2) the standard element along at least one spatial axis. The tactile sensor is used to tactilely detect the standard element.

Abstract: A device for laser projection comprises a first laser diode configured to emit a first linearly polarized laser beam extending along a first polarization axis and a second laser diode configured to emit a second linearly polarized laser beam extending along a second polarization axis that is perpendicular to the first polarization axis. A polarization combiner is configured to combine the first and second linearly polarizing laser beams into a combined laser beam, wherein the combined laser beam comprises one of: (1) circular polarization; and (2) elliptical polarization. A measuring device is configured to measure an intensity of the combined laser beam. A control unit is configured to receive the measured intensity of the combined laser beam and is further configured to adjust an intensity of at least one of: (1) the first laser diode; and (2) the second laser diode.

Abstract: The invention is related to an apparatus for the representation of a geometrical figure on the surface of a patient's body that is situated on a support, comprising at least one projection device, by which a given geometrical figure can be projected onto the three-dimensional surface of the patient's body, at least one control device and at least one optical sensor device, by which the geometrical figure projected onto the surface of the patient's body can be acquired and the acquired data can be supplied to the control device, wherein the control device is realized to determine the three-dimensional coordinates of the geometrical figure projected onto the patient's body from the data acquired by the sensor device, and wherein the control device is realized to compare the determined three-dimensional coordinates of the geometrical figure projected onto the patient's body with desired three-dimensional coordinates.

Abstract: The invention is related to an apparatus for the representation of a geometrical figure on the surface of a patient's body that is situated on a support, comprising at least one projection device, by which a given geometrical figure can be projected onto the three-dimensional surface of the patient's body, at least one control device and at least one optical sensor device, by which the geometrical figure projected onto the surface of the patient's body can be acquired and the acquired data can be supplied to the control device, wherein the control device is realised to determine the three-dimensional coordinates of the geometrical figure projected onto the patient's body from the data acquired by the sensor device, and wherein the control device is realised to compare the determined three-dimensional coordinates of the geometrical figure projected onto the patient's body with desired three-dimensional coordinates.

Abstract: Apparatus for monitoring the alignment of marking lasers in a room for diagnosis and/or treatment in the radiation therapy, characterized by a housing, which is provided with holding means for the installation in the room and which has the following a linearly extending photosensor and an analyzing unit, which compares the position of the light generated by the laser on the photosensor with a reference position, and generates a corresponding signal upon a deviation of the measured position from the reference position.

Abstract: An apparatus for the representation of an area on the three-dimensional surface of a patient's body, with a control device which provides three-dimensional coordinates of at least one area to be represented on the surface of the patient's body, wherein the area pre-sets a desired intersection area of a radiation area on the surface of the patient's body, characterized in that at least one projection device featuring a laser is provided, by which the desired intersection area can be projected to the three-dimensional surface of the patient's body on the basis of the provided coordinates, while at least one laser beam generated by the laser can be guided along the contour of the desired intersection area sufficiently rapidly, so that the impression of a closed contour around the desired intersection area results.

Abstract: The present invention is related to an apparatus for marking an irradiation field on the surface of the patient's body, which was produced by means of a virtual 3D model of a patient's body, with a laser system for determining the coordinates of at least two reference points on the surface of the patient's body in a local coordinate system assigned to the apparatus, with an analysing and control unit which is realised to determine a transformation matrix for the transformation of arbitrary coordinates from the virtual coordinate system into the local coordinate system from the coordinates of the reference points in the local coordinate system and from coordinates of the reference points in a virtual coordinate system of the virtual 3D model of the patient's body, and wherein the analysing and control unit is further realised to transform coordinates from the virtual coordinate system into the local coordinate system with the transformation matrix, and to provide the transformed coordinates to the laser system

Abstract: An apparatus for the representation of an area on the three-dimensional surface of a patient's body, with a control device which provides three-dimensional coordinates of at least one area to be represented on the surface of the patient's body, wherein the area pre-sets a desired intersection area of a radiation area on the surface of the patient's body, characterised in that at least one projection device featuring a laser is provided, by which the desired intersection area can be projected to the three-dimensional surface of the patient's body on the basis of the provided coordinates, while at least one laser beam generated by the laser can be guided along the contour of the desired intersection area sufficiently rapidly, so that the impression of a closed contour around the desired intersection area results.

Abstract: An apparatus for checking the alignment of laser beams for indicating a position in relation to a diagnostic and/or therapeutic machine, which has a isocentre, wherein the machine has a patient support movable in its position, laser beams and isocentre being aligned in relation to each other such that the laser beams intersect with each other in the isocentre of the machine, wherein the machine has the following a carrier element, which is provided with means for being arranged in a predetermined position on the patient support of the machine, a first and a second measuring device, each one at a time being equipped with connection means for the carrier element, wherein the first measuring device measures the position of the impingent laser beams with respect to a predetermined position in relation to the patient support, the second measuring device records the position of the isocentre in relation to the predetermined position of the first measuring device.

Abstract: Apparatus for monitoring the alignment of marking lasers in a room for diagnosis and/or treatment in the radiation therapy, characterized by a housing, which is provided with holding means for the installation in the room and which has the following a linearly extending photosensor and an analyzing unit, which compares the position of the light generated by the laser on the photosensor with a reference position, and generates a corresponding signal upon a deviation of the measured position from the reference position.

Abstract: The invention relates to an apparatus and process for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains. A reliable discrimination of orbiform-curved contours is required in measuring such workpieces. In an aspect of the invention, an apparatus is suggested with three or more laser triangulation devices, which measure the distance from the workpiece surface wherein the lasers of the triangulation device are directed to a common point of intersection which corresponds to the workpiece center and the laser beams of which span a common plane which is perpendicular to the longitudinal direction of the workpiece, and which are at angular distances which are substantially equal.

Abstract: A method for the contact-free measurement of the distance of an object according to the principle of laser triangulation, in which a laser beam is directed onto the measuring object and the illuminated region is so imaged on a line-like sensor with prior-arranged optics, which is arranged laterally next to the laser, that the position of the image on the sensor changes with the distance of the measuring object and from the distance of the image from the laser a distance signal is obtained, wherein at least one laser projects a line onto the measuring object and the light plane of the laser line and the observation plane of the line-like sensor form an angle and intersect in a parallax-free cross.

Abstract: A method for speed measurement according to the laser-Doppler-principle with which with the help of a beam splitter the light beam of a laser is converted into two part beams crossing on or in the measured object and with the help of an optical receiver the spectral maximum of the intensity modulation of the reflected light is measured. A Koster prism is used as a beam splitter such that the part beams formed intersect at the desired angle on or in the measured object.

Abstract: The invention relates to a method for measuring the thickness of non-circular elongated workpieces in which the thickness of the workpiece is measured along three measuring axis, the measurements are fed into a computer to determine minimum and maximum values and associated angular positions of the measuring axis, the measuring systems are rotated to a zero measuring position and the measured thicknesses are correlated by an algorithm, and the computer computes the degree for which angular position of the mimimum and maximum changes when the workpiece is advanced.

Abstract: The invention relates to a target apparatus for linearly inserting an instrument into a human body comprising a computer tomograph for determining the piercing spot and marking it, the improvement comprising: a slide which is adjustably guided above the gantry of the computer tomograph along a horizontal guide means, preferably along a transversal plane, which slide can be arrested in any position along the guide means, a laser device for producing a target mark in space, a supporting means for mounting the laser device to the slide for being pivoted about a horizontal axis such that the beam of the laser device is pivoted in a vertical plane and further comprising an angular scale attached to the slide for indicating the pivoting angle of the laser device.

Abstract: The invention related to positioning and marking a patient at a diagnostic apparatus, for example before and after a fluoroscopic examination in a computer tomograph comprising at least four line lasers being movably supported for travelling along a respective axis, two line lasers being arranged above a patient placed on a movable table projecting a sagittal line and a transverse line on the body of the patient and two further line lines arranges sidewards of the table each projecting a line along the body axis sidewards on the body, further comprising numerically controlled drive means for moving the line lasers to adjust the projected lines in a transverse direction and comprising a positioning control device, controlling the drive means and a manually operated input device for supplying the coordinates, the location and extension of the radiation zone as determined by the computer tomograph for being supplies to the control device, and projecting orthogonal coordinate axes on the patient for marking the p

Abstract: An apparatus for positioning and marking a patient at a diagnostic apparatus, for example prior and after transillumination in a computer tomograph, comprising a plurality of line lasers which project lines in planes perpendicular to each other for alignment with a patient body zone to be irradiated and for marking thereof, the improvement of which comprises a first line laser being fixed to a support member which is mounted so as to be rotatable about an axis adapted to be aligned substantially to a central axis of the diagnostic apparatus, e.g.

Abstract: An apparatus for positioning and marking a patient at a diagnostic apparatus, for example before and after being scanned in a computer tomograph, comprising at least four line lasers adapted to be displaced along an axis, two of said line lasers being arranged above the patient lying upon a displaceable bed so as to project a sagittal line and a transversal line onto the body of the patient and two of said line lasers being arranged laterally of the bed so as to project a line along the body axis laterally onto the body, numerically controlled drives for said line lasers for adjustment thereof transversely to the respective projected lines, position control means for said drives, and manually operable input means for said control means for entering coordinates related to the position and extent of an area to be irradiated and determined by the computer tomograph.