Geodetic target object and surveying system with a structural integration of transmitting channels and receiving channels into a common unit with a reflector component

A method for data transmission for determining the position of a geodetic target object, the geodetic target object having a reflector surface and a transmitted radiation source for producing transmitted radiation that is modulated for transmitting data to a geodetic measuring unit, the geodetic measuring unit including a measuring radiation source for producing measuring radiation that is used for determining a position of the geodetic target object, the method comprising the following acts:

• the measuring unit emitting the measuring radiation to the target object for determining the position of the target object, the measuring radiation being defined by a measuring beam axis and a measuring beam cross-section;
• the measuring unit receiving back-radiated measuring radiation reflected by a reflector of the target object;
• determining the position of the target object from the measuring radiation transmitted by the measuring unit and the back-radiated measuring radiation received by the measuring unit;
• and
• the geodetic target object including a radiation source and emitting the transmitted radiation to the measuring unit, the transmitted radiation being modulated to transmit information encoded data from the target object to the measuring unit over a data transmitting channel that extends through the reflector and to the measuring unit, wherein the reflector includes a common transmissive surface for receiving the measuring radiation therethrough and for transmitting the transmitted radiation therethrough, wherein the common transmissive surface of the reflector is arranged within an area of the measuring beam cross-section at the target object.

A geodetic target object comprising:

• at least one reflector with a reflector surface and a common optically transmissive surface for receiving incident light there through to the reflector surface, the reflector being configured to reflect the incident light in substantially the opposite direction to that received and back through the common optically transmissive surface;
• for measurement of a distance between the geodetic target object and a remote measurement unit
• a receiving channel having a detector for receiving electromagnetic radiation through the common optically transmissive surface;
• a data transmitting channel for communicating information encoded data from the geodetic target object to the remote measuring unit, the data transmitting channel having a radiation source configured to emit modulated and information encoded electromagnetic transmitted radiation through the common optically transmissive surface and at an optical power level sufficient to provide communication of the information encoded data to the remote measuring unit;
• and
• electronics configured to control the transmission of the information encoded electromagnetic radiation by the radiation source.