Abstract

Two iterative methods for the calculation of double-phase holograms (DPHs) are described. The calculation of DPHs by any of these methods allows one to qualitatively reconstruct the amplitude and phase of a wavefront on a format up to 50% of the spatial size of a reconstruction order (in the previous methods, this format was 35%). It is shown that the reconstruction can be realized in this case not only into the 0, +1, or 1 orders, as usual, but also into a half-order (+1/2  or  1/2). The diffraction efficiency of phase-only DPHs is also discussed. The results of numerical and optical experiments are presented.

© 2007 Optical Society of America

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