Vol. 28, Issue 2, pp. 161-169 (1998)

Abstract

This paper is of didactic value. A possibility of aberration correction as exemplified by simple cases of single refractive, diffractive and hybrid lenses is shown. The imaging quality assessment was carried out based on the point spread function, wave aberration and incohenent MTF. These functions were calculated numerically by evaluating the diffraction integral. In the authors opinion, these simple examples render it possible to show clearly the influence of the aberrations on the quality of the image produced by the optical elements operating on either the refraction or diffraction basis or both.