Achromatized hybrid diffractive lens systems

Abstract

We have investigated the design of broadband hybrid diffractive-refractive lens systems for simple camera systems. When achromatizing one of these systems one typically considers only one diffracted order, assuming 100% efficiency. Kinoform structures can approach 100% efficiency at one wavelength, but it inevitably decreases for other wavelengths. Therefore one must take into account this effect when evaluating image quality.