Phase Grating Application for Digital Holographic Imaging

Abstract

An application of phase harmonic grating for digital holographic imaging was modeled. The process of digital hologram recording was simulated in off-axis geometry combined by placing a grating in reference or object beam with the subsequent image reconstruction by Local Least Square method. We characterized and evaluated this method by using simulated data of different phase grating parameters (period) and its position and angle in reference or object beam. We show that, by means of a phase grating in reference beam, it is possible to increase the quality of reconstructed image in comparison with holographic recording without grating. This method may find practical applications in three-dimensional digital imaging and microscopy.