Recovering correct phase information in multiwavelengths digital holographic microscopy by compensation of chromatic aberrations

We demonstrate experimentally that correct phase imaging without ambiguity is obtainable in digitalholography by using a multiwavelength approach in the microscope configuration. We describe a general approach for removing chromatic aberrations and for controlling the pixel size of the reconstructed phaseimage in multiwavelength digital holography when the Fourier transform method is adopted for the umericalreconstruction of digital holograms. The retrieved phase is affected by the unavoidable, unwanted chromatic aberration. The correct phase can be obtained by evaluating the phase from the reference hologramsreconstructed at different wavelengths to compensate for the chromatic aberration