Leica Geosystems Ag

Leica Ag

Leica Heerbrugg Ag

Wild Heerbrugg Aktiengesellschaft

Bernhard F Gaechter

Bernhard Braunecker

Andre Huiser, Deceased

Andreas Schilling

Urs Vokinger

John Rice Rogers

Laurent Stauffer

Fritz Muller

The invention concerns a method and device for determining the direction of an object (,) which emits or reflects optical radiation. An optical element (,) which structures the wavefront of the radiation converts the conventional dot-type image (,) into an intensity distribution (,&prime;) with more than one maximum on a locally resolving opto-electronic detector (,). From the intensity distribution (,&prime;) and the structure function of the optical element (,), the direction of the object (,) can be determined with a high degree of accuracy over a wide measurement range. In addition, this gives a design with a shorter optical path length and very few optical components.

Method and device for determining the direction in which an object is located

Leveling instrument

Process and device for the electro-optical measurement of distance

Process for measuring the inclination of boundary areas in an optical

Wave front sensor

Process and apparatus for testing optical components or systems

The measuring device is used for determining a relative position between a first item and a second item or the image thereof. The items are displaceable or rotatable relative to one another. The first item has a code carrier, which is arranged along a path. The code carrier is provided with a code pattern at right angles to the path. The second item has a code reader oriented on the code carrier path. A computer is connected downstream of the code reader and has means for quantifying the signal supplied by the code reader and for comparing with a stored code image of the code carrier, as well as for calculating the relative position from the comparison result. This measure permits automatic reading of the position, accompanied by a very high measuring accuracy. The measured result can be digitally displayed and, if required, can be directly stored on a data carrier and/or can be further processed in a computer.

Measuring device for determining relative position between two items

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Balgach, Switzerland

Bernhard F Gaechter