Leica Geosystems Ag

Hexagon Technology Center Gmbh

Urs Vokinger

Heinz Lippuner

Knut Siercks

Werner Amann

Andreas Schilling

Heinz Bernhard

Bernhard F Gaechter

Laurent Stauffer

Bernhard Gächter

Bernhard G&auml;chter

Bernhard Gachter

Measurement method where a code projection which is dependent on a three-dimensional position of a code carrier relative to a sensor arrangement is generated on a sensor arrangement, and at least part of the code projection is captured. An angular position of the code carrier with reference to the defined axis of rotation is ascertained and a current measurement position of the measurement component relative to a base is determined, wherein, a position value for at least one further degree of freedom of the code carrier relative to the sensor arrangement is ascertained on the basis of the code projection and is taken into account to determine the current measurement position, and a relative position of the connecting element with respect to the holder and/or the deformation thereof is determined from the position value in the form of a change in shape or size.

Measurement method for a surface-measuring measuring machine

A linear encoder can have a mass embodiment having a position code marking, a read head having a calibration means, and a control and analysis unit, and calibration method for calibrating a position code made of code elements using the read head. The read head has a sensor unit having at least two detection reference points, the detection distance of which establishes at least one standard with high precision. In the scope of the calibration method, calibrated position values are prepared for code elements with the aid of the standard, which is determined with high precision, and are stored in the control and analysis unit.

Linear encoder having calibration functionality

The invention concerns a method for determining absolute coding represented by code elements of an optical code track, with illumination of the absolute coding with light, modulating of some of the illuminating light on code elements, determining of the absolute coding as modulated light and continuously varying modulation of the light on neighboring code elements.

Method for determining absolute coding of an optical coding track

Embodiments described herein include an optoelectronic position measuring device that may include a code carrier, which carries an optically detectable position code, a radiation source for emitting optical radiation onto the code carrier, and a detection element having a multiplicity of light-sensitive reception regions for receiving at least part of the optical radiation, as a result of which a scanning signal dependent on the position code can be generated and a position of the code carrier relative to the detection element can thus be detected, wherein the measurement components are arranged in a fixed spatial relationship with respect to one another on a carrier element, the code carrier is movable with one degree of freedom, in particular rotationally or along an axis, and the code carrier and the carrier element are arranged at a fixed spatial distance with respect to one another.

Optoelectronic position measuring device including a code carrier, a radiation source, and a detection element

System for determining relative positions comprising an encoder having encoder elements, and a sensor unit having a first sensor and at least one second sensor. The sensor unit and the encoder are movable relative to one another and their position relative to one another is determinable by the system. The first sensor and second sensor have a sensor distance with respect to one another. The sensor furthermore has a component composed of a dimensionally stable and aging-resistant material having a coefficient of thermal expansion which, in terms of absolute value, is in a range of 0 to 5&#xb7;10K. The sensor distance is determinable highly precisely by the component by virtue of the component serving for the positional fixing of the sensors or by virtue of the component having a scale with the aid of which the sensor distance can be measured.

Encoder and sensor system having plural sensors and encoder elements for determining relative positions

The invention relates to a calibration method that can be carried out without a reference system for an angle measuring device having a code carrier carrying an absolute position code, and at least two reading heads comprising a fixed, known angle position at an angular distance, wherein the code carrier can be rotated relative to the reading heads, and different angle positions of the code carrier relative to the reading heads can thus be captured. Angle position values of the reading heads in an angular setting are determined and angular error is determined, which are repeated. And, a mathematical analysis method is performed, including determining the parameters of a mathematical function quantifying the angular error, and determining calibration parameters as parameters of the quantifying mathematical function or as a correction or code table derived from the parameters.

Calibration method and angle measuring method for an angle measuring device, and angle measuring device

The invention relates to an optoelectronic measurement method for determining a position, particularly an angle or a length, of a code carrier () that carries a position code () and is movable relative to a detector element () with a degree of freedom, particularly in a rotary or translational fashion. The detector element () has at least one line in the longitudinal direction comprising a plurality of light-sensitive receiving regions () disposed in a linear fashion. In the course of the positional measurement method, a projection is produced of part of the position code () on the detector element () that is dependent on the position of the code carrier (); said projection is produced by at least an emission of optical radiation onto the code carrier () using a laser diode () having an emitter edge (), and said projection is detected by the detector element (). The position of the code carrier () relative to the detector element () is derived from the projection. According to the invention, in the projection on the detector element () thus produced, the axis of divergence of the laser diode emission () running perpendicular to the emitter edge () has a substantially parallel orientation to the longitudinal axis () of the detector element ().

Optoelectronic longitudinal measurement method and optoelectronic longitudinal measurement device

In order to improve target illumination, a light source () of an emitter, which has a laser diode () configured as an edge emitter with a wavelength of 1,550 nm, has beam forming optics () mounted downstream in relation thereto, which comprise a cylindrical lens () and a first deflection element () with three fields having different diffraction structures. Said deflection element are located next to one another and crosswise in relation to the first fields and which also have different diffraction structures. Said deflection element directs the partial beams to the aperture of a collimator () in such a way that the partial beams substantially fill said aperture. The first deflection element () and a mount () for the cylindrical lens () are integral and, alike the second deflection element (), are made of plastic. Both parts are glued to opposite sides of the frontal areas of a block () made of glass.

Optical telemeter target illumination apparatus with edge emitter light source

In order to improve target illumination a light emitter comprises several partial light sources ( ), the partial beams ( ) of which are collected by means of a beam collector optic ( ) and directed to the aperture of a collimator ( ). The beam collector optic ( ) comprises two half-mirrored sheets ( ), which each direct two similarly polarized partial beams ( ) side by side onto a polarization cube ( ), where the pairs of partial beams which are polarized perpendicular and orthogonal to each other are overlaid.

Growing community of inventors

Au, Switzerland

Urs Vokinger