METHOD OF SOLVING CEMENTED TRIPLETS WITH GIVEN PRIMARY ABERRATIONS

An effective algorithm is proposed for solving the structure of thin-l ens cemented triplets which consist of three different glass types and have the given target values of power, primary spherical aberration, coma and longitudinal chromatic aberration. The formulae for the aberr ations are combined with the power formula into a fifth-order polynomi al equation in one variable, whose roots can all be solved by a combin ation of numerical and algebraic methods.