Application of diffraction gratings for phase imaging enhancement in digital holographic microscopy

Abstract

In this work we simulated the application of phase diffraction grating for phase imaging enhancement of a phase object reconstruction. At first, the phase retrieval of object was modeled without the use of mask and then it was compared with process where the mask was applied. The process of digital holographic recording of wavefront information originating from the object with subsequent computer reconstruction of object image was modeled using Matlab software. Here, we modeled digital holograms that result from the interference between the wave transmitted by the object to be imaged and a plane reference wave in off-axis optical geometry. Local Least Square (LLS) method was used to reconstruct the phase of wavefronts from a designed digital hologram.