Abstract

Two object-dependent filters (an amplitude filter and a phase one) are used in the object plane at the iterative calculation of a kinoform instead of a single (phase) filter, as usual. The amplitude filter involves a system of weight coefficients that vary in the process of iterations and control the amplitude of an input object. A simple procedure to introduce the carrier frequency into the structure of an axial kinoform is proposed. An image reconstructed by an off-axis kinoform is free from the noises with the zero and close frequencies caused by the imperfection of both the phase mode of operation of a Spatial Light Modulator (SLM) and the effects of quantization of the registered phase. The advantages of the proposed method over other ones are confirmed by model and optical experiments.

© 2011 Optical Society of America