A QUADRATIC ADAPTIVE METHOD FOR ABERRATION CORRECTION

A new non-merit function based lens design algorithm has been develope d which combines a quadratic approximation to the individual aberratio n variations with adaptive aberration central. This results in an incr ease in the magnitude of the applied parameter changes and a reduction in the computing load compared to the linear adaptive method. Example s given verify that the method described can diagnoze specific aberrat ional problems. This feature, together with the increased magnitude of the applied parameter changes, enhances the radius of convergence in computer-aided lens design.