Design of a freeform, wide field of view, high angular resolution four-mirrors system working in the visible and near-infrared spectrum

Abstract

Situational awareness requires systems with a wide field of view and a high angular resolution. Tackling both requirements is easier using freeform optics and a curved sensor and allows for compact systems. In this paper, we present an imaging system that fulfills these requirements in the visible spectrum, and the steps in the optimization process that lead to a viable system in terms of stray light.