This book presents an in-depth look at lenses free of spherical aberrations and is provided
using illustrative examples. Mathematical principles behind lenses free of spherical …

This feature issue of Optics Express highlights 28 state-of-the-art articles that capture a
snapshot of the recent developments in the field of freeform optics. As an introduction, the …

Off-axis reflective optical systems are frequently large in volume to avoid obscuration, and
their subsequent optimizations are complex and time-consuming, resulting in volume …

This paper presents a design method for off-axis reflective zoom optical systems. The
method can be used to design off-axis zoom optical systems that include multiple mirrors …

We present the results and methods of a survey of the four-mirror freeform imager solution
space. This survey is a grid search over the parameters that remain after reducing the …

The surface design methods for unobscured mirror systems have certain limitations, such as
time consuming and uncertain optimization possibility. Although neural networks can …

The exact partial differential equation to design aplanatic freeform-mirror-based optical
systems is presented. The partial differential equation is not limited by the number of …

This paper presents a novel method, to the best of our knowledge, to design three-freeform-
mirror systems from scratch. The technique consists of getting an initial setup, before …

Reimaging telescopes have an accessible exit pupil that facilitates stray light mitigation and
matching to auxiliary optical systems. Freeform surfaces present the opportunity for …

The set of all possible stigmatic systems made by mirrors is presented. The derivation of the
set is analytical, and it is based on the Fermat principle. The properties of the set are …