Methods and devices for producing three-dimensional objects by selectively solidifying a construction material applied in layers

A device for producing a three-dimensional object, comprising:

• at least one process chamber comprising at least one construction platform arranged in an XY plane, on which construction platform a construction material to be solidified is applied in layers to generate the three-dimensional object;
• a radiation source for generating a beam to selectively solidify the construction material to be solidified;
• at least one beam guiding element for guiding and deflecting the beam onto the construction material to be solidified which is displaceable above the construction platform at least in a direction of the XY plane;
• and
• a process support device which is displaceable above the construction platform at least in the direction of the XY plane, wherein the process support device comprises
• a beam guiding section for the beam directed onto the construction platform, and
• a first module and a second module arranged on either side of the beam guiding section, wherein each module comprises
• at least one application device for releasing construction material to be solidified and
• a monitoring device having at least one sensor element for detecting the applied and solidified layer of the construction material.