Hans Portsteffen

TH Köln - University of Applied Sciences

Papers

Total Citations

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About

Hans Portsteffen is a leading figure in heritage science, specializing in the non-invasive analysis and conservation of cultural artifacts. His research bridges advanced imaging technologies and art restoration, with a particular focus on terahertz (THz) tomography and its application to wooden sculptures and painted objects. Portsteffen’s major contribution lies in demonstrating how robotic-based THz time-of-flight tomography can reveal hidden layer structures, subsurface defects, and even insect tunneling—critical information for minimally invasive restoration. His most cited work, “Investigating the Layer Structure and Insect Tunneling on a Wooden Putto Using Robotic-Based THz Tomography” (2020, 13 citations), exemplifies this approach, offering a precise diagnostic method that aligns with the conservation principle of intervening “as little as possible, but as much as necessary.” By integrating robotics with THz imaging, Portsteffen has advanced the field’s ability to assess the actual state of three-dimensional objects without physical contact. His work is highly regarded among conservators and heritage scientists, providing a practical, high-resolution tool for preserving irreplaceable artworks.