All-spherical wide-field camera

Abstract

An all-spherical catadioptric telescope with an aperture of 75 cm and an angular field of view with a diameter of 10◦ (260 mm) is described. The design provides D80 image quality better than 1.9′′ (13.6 μm) on a flat detector. The limiting stellar magnitude and speed of the sky survey achievable with this system are estimated.