Leica Geosystems Ag

Hexagon Technology Center Gmbh

Juerg Hinderling

Klaus Schneider

Marcel Rohner

Kurt Giger

Reto Stutz

Heinz Bernhard

Robert Fritsch

Roland Graf

Anton Kehl

Wolfgang Rebhandl

Hartmut Ehbets

Bo Pettersson

Jochen Scheja

Benedikt Zebhauser

Paul Benz

Bernd Walser

Christian Schorr

Laurent Stauffer

Frank Saupe

Marco Petermann

Marcel Buerki

Gerhard Bayer

Bianca Gordon

Mirko Wiebking

Gerhard Kern

Pius Vorburger

Helmut Ghesla

A device having a scan function comprising an electro-optical distance measuring element having a laser axis as the target axis, a motorized optical deflection unit, which deflects the target axis by a deflection angle, and an angle measuring element for determining at least one angular position of the deflection unit. First measurement of angle coordinates of a reticle in a first angular position of the deflection unit as the first position, and second measurement of angle coordinates of the reticle in a second angular position of the deflection unit as the second position. The first and second measurements of the reticle are carried out on the basis of images taken with a camera, the optical axis of which is deflected by the deflection unit, and calibration parameters are determined on the basis of the angular positions and the angular coordinates in the first and second positions.

Calibration method for a device having a scan function

Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target, including a transmitter for sending out a pulse shaped optical radiation to the target as well as a receiver for an optical signal built for turning the optical signal to an electrical signal, and a filter with a transfer function for filtering the electrical signal whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital-converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data.

Highly accurate distance measurement device

A method and system for determining the position of a hand-held power tool on a wall including measuring distances within a plane perpendicular to a tooling axis in at least two directions, comprising at least the direction to one side wall and the direction to the floor or the ceiling. At least one non-contact measurement sensor module measures distances in a multitude of angles in an angular range of at least 1&#xb0; around the at least two directions. From the distance sequence measured by the at least one measurement sensor module a calculation and storing unit automatically calculates a function, wherein extrema represent shortest distances to walls, floor and/or ceiling adjacent to the wall. From said function the calculation and storing unit deduces the shortest distances, and output means provide information about the shortest distances so as to allow positioning relative to the shortest distances.

Working tool positioning system

A sighting device includes an objective unit, an image unit, a transmitter for emitting measurement beams as transmitted beams and/or a receiver for capturing measurement beams as received beams, and at least one optical deflection means for coupling the transmitted beams into the optical beam path of the sighting device. The at least one lens comprises a cylindrical recess around the optical axis, the recess extending in the direction of the optical axis. Furthermore, the deflection means comprises a cylindrical fastening section that extends inside the recess such that a gluing gap is created between the outer lateral surface of the fastening section and at least a portion of an inner lateral surface of the lens defined by the recess, and the deflection means is fastened to the at least one lens, mediated by an adhesive located in the gluing gap.

Sighting device, in particular telescopic sight, for a geodetic measuring apparatus and optical objective unit assembly for such a sighting device

A device projecting a reference line, wherein at least one part of the reference path may be detected upon passing through by the human eye and/or detectors as a reference line. In conjunction with passing through the reference path, a distance measurement occurs to at least one point on the reference path by transmitting a measurement beam that is parallel or coaxial to the reference beam or using the reference beam as a measurement beam. After receipt of portions of the reflected measurement beam, a signal is derived from said portions and a distance from at least one point is determined from the signal, wherein the guidance along the reference path is repeated at least once more and, upon each instance of passing through the reference path, a distance or distance-related variable is determined for each point.

Distance-measuring method for a device projecting a reference line, and such a device

The invention relates to a device () projecting a reference line, having an electro-optical distance measurement unit that guides an optical reference beam (RS) along a defined reference path (RP), wherein at least one part of the reference path (RP) may be detected upon passing through by the human eye and/or detectors as a reference line. In conjunction with passing through the reference path (RP), a distance measurement occurs to at least one point (P) on the reference path (RP), particularly to a plurality of points (P), by transmitting a measurement beam that is parallel or coaxial to the reference beam (RS) or using the reference beam (RS) as a measurement beam. After receipt of portions of the reflected measurement beam, a signal is derived from said portions and a distance (D) from at least one point (P) is determined from the signal, wherein the guidance along the reference path (RP) is repeated at least once more and, upon each instance of passing through the reference path (RP), a distance (D) or distance-related variable is determined for each point (P).

For the deliberate attenuation of beam components which originate from multiple reflections, an attenuation filter () which produces an attenuation of the intensity by at least a factor of 0.7, preferably at least 0.5 or 0.3, is arranged in each case before a receiver () and after a transmitter (). Alternatively or additionally, deflection means, such as a mirror () or a cubic prism (), can be formed so as to attenuate a beam. Since multiply reflected beam components pass through the attenuation means at least twice as frequently as the regular beam components the former are accordingly more greatly attenuated. Furthermore, an entry surface () of the receiver () may be surrounded by a conical deflection surface which substantially absorbs light incident on it and reflects the remainder in directions other than the direction of incidence, so that this cannot give rise to multiple reflections.

Target acquisition device

A device for measuring the distances (d) to far-off objects () and close objects by emitting modulated laser beams () that are reflected on the objects. The device includes an objective (), structure(s) () for selecting beams, and a receiver (). Beams are bundled by the objective, the beams not only containing the laser beams () reflected on the objects but also background beams (). The beams in an associated cross-sectional region () of the bundle are selected from a bundle of beams by the selection structure(s) (). The cross-sectional region includes a first section () and at least one second section (), laser beams () reflected by a far-off object being associated with the first section (), and laser beams () reflected by a close object () being associated with the at least second section ().

Device for measuring the distance to far-off objects and close objects

Arrangement for retroreflection of a ray using triple prisms

Process and device for rapid detection of the position of a target

A device for measuring distance with a visible measuring beam (11) generated by a semiconductor laser (10), has a collimator object lens (12) to collimate the measuring beam towards the optical axis (13) of the collimator object lens (12), an arrangement to modulate the measuring radiation, a reception object lens (15) to receive and image the measuring beam reflected from a distant object (16) on a receiver, a switchable beam deflection device (28) to generate an internal reference path between the semiconductor laser (10) and the receiver and an electronic evaluation device (25) to find and display the distance measured from the object. According to the invention, the receiver contains a light guide (17') with a downstream opto-electronic transducer (24), in which the light guide inlet surface (17) is arranged in the imaging plane of the reception object lens (15) for long distances from the object and can be controllably moved (18') from this position (18) transversely to the optical axis (14). In an alternative embodiment, the light inlet surface (17) is fixed and there are optical means (36) outside the optical axis (14) of the reception object lens (15) which, for short object distances, deflect the imaging position of the measuring beam to the optical axis (14) of the reception object lens (15). The measuring radiation is pulse modulated with excitation pulses with a pulse width of less than two nanoseconds.

Device for distance measurement

Growing community of inventors

Marbach, Switzerland

Juerg Hinderling