THz holographic imaging: A spatial-domain technique for phase retrieval and image reconstruction

A method has been introduced for the phase-retrieval step in the field of holographic imaging. In contrary to the phase-retrieval methods available in the literature which are mainly implemented in the wave-number domain the method introduced here retrieves the phase directly in the spatial domain. Although, the method is applicable to holographic imaging at any frequency and wavelength, its validity is investigated at 310 GHz practically. The image quality of a metallic object reconstructed by means of the method introduced confirms the validity and applicability of this method to holographic imaging systems.