Nonimaging Optics Minisymposium

Martijn Anthonissen

Eindhoven University of Technology, Computational Illumination Optics Group

Martijn Anthonissen works at Eindhoven University of Technology in the Computational Illumination Optics group. This is one of the few mathematics groups worldwide working on optical design problems from illumination optics.

The team has a healthy portfolio of PhD positions and close collaborations with industrial partners. The research focuses on nonimaging freeform optics, imaging optics and improved direct methods.

Julius Muschaweck

JMO GmbH

Julius Muschaweck, a German physicist, has been working on optical design for illumination for almost thirty years. After a stay as Visiting Scholar at the University of Chicago with Prof. Roland Winston (well known as the originator of Nonimaging Optics), he was co-founder and CEO of OEC, an optical engineering service which pioneered freeform optics for illumination.

Later, at OSRAM, where he held the position of Senior Principal Key Expert, he coordinated the over 100 optical designers within OSRAM worldwide. He then joined ARRI, the leading movie camera and lamp head maker, as Principal Optical Scientist.

Julius Muschaweck now works as an independent consultant, providing illumination optics solutions to industry clients, teaching courses on illumination optics, and writing about the subject. He is the author of over 25 scientific papers and the inventor of over 50 patent applications. He also loves to go hiking with his wife and their dogs.

Henning Rehn

Owner and Optical Designer, Illuminatio Solutions GmbH

Henning Rehn is a physicist and optical engineer with extensive experience in R&D management and optical design. He received his PhD in Applied Optics from Friedrich-Schiller-University in Jena, Germany in 1995, where he had studied physics and also completed postdoctoral work.

His professional career includes positions as optical engineer and project manager at Carl Zeiss Jena (1998-2001), projector lamp development at OSRAM Berlin (2001-2007), R&D Manager for LED products at OSRAM (2007-2013), and Principal Key Expert in Optical Design at OSRAM (2013-2018). He then served as Team Leader of the Optical Design Group at FISBA AG in St. Gallen (2018-2025).

In 2025, Dr. Rehn founded Illuminatio Solutions GmbH, where he continues his work in optical design as owner and optical designer.