Leica Geosystems Ag

Hexagon Technology Center Gmbh

Martin De Lange

Jürg Hinderling

Simon Bestler

Rainer Wohlgenannt

Paul Benz

Benjamin Seifert

An absolute distance measuring method and device including a transmission unit having a laser array comprising multiple measurement laser emitters arranged along a laser array axis and a receiver unit having at least one receiver array comprising multiple measurement receivers arranged along a receiver array axis for measuring of an absolute distance based on a respective detected transmission beam and the principle of time-of-flight. The laser array comprises at least a first reference laser emitter and the receiver array comprises at least a first reference receiver. The reference laser emitter and reference receiver define an internal absolute distance reference beam path for calibration of the device with respect to said measuring of absolute distance.

Multi-beam measuring device

According to the invention, a light signal is emitted to one or several targets in order to derive geodetic distance data therefrom. Apparatus components such as transmitters (&#x2033;) and receivers (&#x2033;) are modeled along with the targets (and) as a linear, time-invariant system which is excited by means of a signal s(t) and the system response y(t) of which is recorded. Unlike in delay meters or phase meters, the distance data is derived from both the delay and the signal form of the system response.

Method and device for deriving geodetic distance data

Growing community of inventors

Kesswil, Switzerland

Martin De Lange