Paul-Baker telescope

Paul–Baker telescope

Paul–Baker telescope

(pawl bay -ker) A compact three-mirror telescope with a very wide field of view, designed by Maurice Paul in 1935 and modified by James Baker in about 1945 (see illustration). A paraboloidal primary mirror is used with a convex ellipsoidal secondary and concave spherical tertiary to produce a high-quality image on a flat focal plane; there is very low image spread.