Abstract: A system for monitoring manufacturing precision in the additive manufacturing of three-dimensional components. A combined illuminations and detection element is provided equipped with a two-dimensional detector array and at least one laser radiation source directed onto a region of a material in powder or paste form. Producing at least one region of a three-dimensional component with a locally defined energy input. The detector array is arranged and designed such that speckle arising in/on the surface irradiated by the laser radiation source can be detected in a spatially resolved manner. The speckle signals are sensed in a spatially resolved manner using the detector array can be fed to an electronic evaluation and control circuit which is connected to an electronic open- and closed-loop control device designed to influence the production process.