NULL CORRECTORS FOR THE ASPHERICAL SURFACES IN THE SCHEMES OF THE MIRROR TELESCOPES
ITMO University, Department of Optical Technologies; Post-Graduate Student
G. E. Romanova
ITMO University, 197101, Saint-Petersburg, Russian Federation; Associate professor
Abstract. The procedure for the design of the lens correctors for the higher-order aspherical surfaces in the fourmirror scheme of the telescope with the spherical primary diameter of 10 m is considered. The null correctors for the first two aspherical surfaces which are higher-order hyperboloids may be formed as modified Offner scheme. For the prolate spheroid (the last mirror in the telescope scheme) the null corrector which consists of the meniscus with the aspherical surface and the plane-parallel plate can be used.
Keywords: null correctors, aspherical surfaces, Offner null corrector