Trimble Jena Gmbh

Trimble Inc.

Carl Zeiss Jena Gmbh

Hermann Goering

Marcel Seeber

Steffen Laabs

Thomas Marold

Ludwin-Heinz Monz

Bernd Donath

A distance measuring system comprises a radiation source, a radiation detector, a measuring lens system, a first damping filter, a second damping filter and an actuator. The radiation source is constructed to emit optical radiation and the radiation detector is constructed to detect optical radiation. The measuring lens system is designed to project optical radiation to a target and to conduct optical radiation reflected by the target to the radiation detector. The first damping filter has a constant damping and can be arranged in a beam path between the radiation source and the measuring lens system. The second damping filter has an adjustable damping and can be arranged in a beam path between the measuring lens system and the radiation detector. The actuator is mechanically coupled to the first and also to the second damping filter and is constructed to move the first and the second damping filter in common.

Distance measuring system

A distance-measuring system includes a light source, a light detector, and measuring optics for projecting light emitted by the light source to a target and for guiding light reflected from said target towards the light detector. The distance-measuring system also includes reference optics for guiding light emitted by the light source within the system towards the light detector as internal reference light and a variable attenuator for adjusting intensity of light incident on the light detector. The variable attenuator includes an attenuating filter arranged in a beam path between the measuring optics and the light detector and an actuator coupled to the attenuating filter for moving the attenuating filter. The distance-measuring system further includes an optical selector coupled to at least one of the actuator or the attenuating filter and moved by the actuator together with the attenuating filter.

Distance-measuring system

A method for target seeking in geodetic survey measurements comprises the steps of generating at least a first light bundle by a measurement device from a light source arranged therein, the light bundle periodically pivoting back and forth or revolving about the standing axis of the measurement device and fanning out in the vertical plane and being sent to at least one receiver arrangement arranged in at least one target station arranged at a distance from the measurement device. The steps of the method also include generating an electrical signal when the light bundle hits the receiver arrangement of the at least one target station, conveying these electrical signals generated in the target station, or the time difference determined from these electrical signals to the measurement device through a transmitting device provided in the target station, determining the horizontal angle to the respective sighted target station from the time difference of two electrical signals generated one after the other in time by angles measured or stored at constant time intervals and pivoting a second modulated light bundle at an angle in the vertical plane and sending it in the direction of the target station for determining the vertical angle of the measurement device. Further, when the second light bundle hits the receiver arrangement in the target station, the method includes the step of generating another electrical signal and sending it to the measurement device and determining the vertical angle to the respective target station therefrom in the measurement device. Also disclosed is a device in accordance with the method.

Method and device for target seeking for geodetic devices

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Jena, Germany

Hermann Goering