No abstract

The possibility is shown of achro- and apochromatic correction of an optical system with any residual chromatism by completing the system with a diffractive-refractive hybrid corrector comprising one diffractive lens and one or two refractive lenses.

This paper presents the results of a comparison of the dependences of the efficiency of diffraction lenses that have a two-layer microstructure with internal and external reliefs on the wavelength and angle of incidence of the radiation. These dependences are obtained in the framework of scalar diffraction theory and by a method based on the solution of the system of Maxwell's equations. The requirements on the microstructure are determined for which a diffraction lens as an element of an optical system designed to operate in the visible region has the highest diffraction efficiency.

A method of designing a plastic zoom lens with a diffractive-refractive hybrid corrector, comprising one diffractive lens and one refractive lens, is described. The efficiency of this method is demonstrated by designing a compact zoom lens for a mobile phone. This zoom design, incorporating lenses made only of two commercial optical plastics (polymethylmethacrylate and polycarbonate), provides high optical performance.

The possibility and the efficiency of using a single diffractive lens to achromatize and apochromatize micro-objectives with plastic lenses are shown. In addition, recommendations are given on assembling the starting configurations of the objectives and calculating the design parameters required for subsequent optimization. It is also shown that achievable optical performance of achromatic and apochromatic micro-objectives with plastic lenses satisfy the qualifying standards for cell-phone objectives and closed-circuit television (CCTV) cameras.