Cassegrian Telescope Design Based on Root-Finding Optimization

A two-mirror Cassegrian telescope design is presented. The primary mirror is paraboloid with anaperture of 1m in diameter. The secondary mirror is hyperboloid with an aperture that makes a lightobstruction of merely 0.25%. The telescope resolving power is twofold the one a spherical primarymirror produces with the same aperture. Aberration elimination is obtained by modifying the radiusof curvature of the secondary mirror and also its asphericity factor. Achieving this work demandedconstructing a programming code for tracing light rays. This code not only used to tracing thegeneral type of light rays (skew ray) through all Cartesian surfaces but it is also used to exhibit thetelescope performance when varying the secondary mirror radius of curvature and its asphericityfactor.