Open AccessSPHERICAL PRIMARY MIRROR IN TELESCOPES WITH COMPLEX (MULTI-ELEMENT) OPTICAL DESIGNS
Author(s) -
S. V. Podlesnyak,
N. N. Fashchevsky,
Yu. N. Bondarenko,
S. M. Andrievsky
Publication year - 2021
Publication title -
odessa astronomical publications
Language(s) - English
Resource type - Journals
eISSN - 2786-5215
pISSN - 1810-4215
DOI - 10.18524/1810-4215.2021.34.244333
Subject(s) - curved mirror , optics , plane mirror , primary mirror , physics , cardinal point , secondary mirror , lens (geology) , aperture (computer memory) , spherical aberration , spherical wave , telescope , wavefront , reflection (computer programming) , focal length , reflecting telescope , plane (geometry) , geometry , computer science , mathematics , programming language , acoustics
An optical design for telescope with spherical primary mirror, planoidal surface and two-lens corrector is discussed. The spherical mirror hasn aperture ratio 1/2.69. After reflection from the spherical mirror, the wave front falls on a planoidal surface and “forms” the reflected wave front from a virtual mirror with e 2 = 1.576. After passing the two-lens corrector, the light is collected in the focal plane. A dot diagram in the focal plane shows that all three-order aberrations are successfully corrected. The effective field of view is 2 degrees. The aperture ratio is 1/2.28.