Rainer Heintzmann works as a research head and university professor at the Leibniz Institute of Photonic Technology and the Friedrich Schiller University Jena. His research focuses on imaging cellular function at high resolution. His group develops techniques to measure multidimensional information in small biological objects such as cells, cellular organelles or other small structures of interest. A further interest is in computer-based reconstruction methods. Software packages in Julia and other languages are developed for scientific computing and visualization with a special focus on optics and deconvolution.