% Optical axis definition nix 0 Global optical axis, x-component niy 0 Global optical axis, y-component niz 1 Global optical axis, z-component % Telescope geometry d_pupil 250[mm] Entrance pupil diameter f 1000[mm] Primary mirror focal length k -1.0 Primary mirror conic constant F f/d_pupil Primary mirror focal ratio f_image 200[mm] Image plane position (relative to optical axis) d_sec f_image/F Secondary mirror diameter (projected) delta_sec sqrt(2)*d_sec*(d_pupil-d_sec)/(4*(f-f_image)) Secondary mirror offset (relative to optical axis) d_image d_sec Image plane diameter d_clear 0 Primary mirror clear diameter (use full mirror surface) d1_prim 260[mm] Primary mirror surface diameter d0_prim 275[mm] Primary mirror full diameter Tc_prim 35[mm] Primary mirror thickness Tc_sec 10[mm] Secondary mirror thickness