High-speed apo-lens with kinoform element

The preliminary design of optical systems with kinoform element (KE) in the field of second and fourth order wave aberrations is considered taking into account the highest order spherochromatism. The results of balancing of highest-order aberrations are discussed. The choice of the optimum aberration balance is shown. On the basis of this method, the apo-lens F/1.8/300 with KE is designed. The theoretical and experimental characteristics of this lens are presented.