Comparison of electromagnetic and scalar methods for evaluation of efficiency of diffractive lenses for wide spectral bandwidth

Abstract The results of comparing the dependencies of the diffraction efficiency of the diffractive lens on the wavelength and the angle of incidence are presented. These dependencies were obtained using electromagnetic and scalar methods for a two-layer microstructure with internal and external reliefs. We determined the microstructure conditions under which the diffractive lens, a part of the wide-spectral optical system, exhibits the highest diffraction efficiency.

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