3 papers
physics.optics2020
Freeform imaging system design with multiple reflection surfaces
Yunfeng Nie, David R. Shafer, Heidi Ottevaere +2
Reflective imaging systems form an important part of photonic devices such as spectrometers, telescopes, augmented and virtual reality headsets or lithography platforms. Reflective…
physics.optics2020
Freeform imaging systems: Fermat's principle unlocks 'first time right' design
Fabian Duerr, Hugo Thienpont
For more than 150 years, scientists have advanced aberration theory to describe, analyse, and eliminate imperfections that disturb the imaging quality of optical components and sys…
physics.optics2019
Predicting graphene's nonlinear-optical refractive response for propagating pulses
David Castello-Lurbe, Hugo Thienpont, Nathalie Vermeulen
Nonlinear-optical refraction is typically described by means of perturbation theory near the material's equilibrium state. Graphene, however, can easily move far away from its equi…