Advanced optical designs of curved detectors-based two-mirrors unobscured telescopes

TL;DR

This paper explores advanced unobscured telescope designs using curved detectors based on classical two-mirror schemes, achieving near diffraction-limited imaging over a wide field of view with feasible detector surface shapes.

Contribution

It introduces novel unobscured telescope configurations with curved detectors, demonstrating their optical performance, ghost analysis, and technological feasibility.

Findings

Near diffraction-limited image quality in the visible domain

Wide field of view of 0.4° x 0.4° with f/7

Feasible detector surface shapes confirmed

Abstract

In the present paper we consider a family of unobscured telescope designs with curved detectors. They are based on classical two-mirror schemes -- Ritchey-Chretien, Gregorian and Couder telescopes. It is shown that all the designs provide nearly diffraction limited image quality in the visible domain for $.4^\circ \times .4^\circ$ field of view with the f-number of 7. We also provide a brief ghost analysis and point on special features of the systems with curved detectors. Finally, the detector surface shape obtained in each case is analyzed and its' technological feasibility is demonstrated.