A simple approach for large size digital off-axis hologram reconstruction

Abstract

A new method of digital off-axis hologram reconstruction based on the Fresnel transform is proposed. A combination of composite filtering, Abbe’s limitation, and digital lens formulae has been used with an appropriate handling of Fresnel impulse response propagator. A clear image of microscopic object is efficiently reconstructed from hologram by using a plane reference wave with involvement of electric field vector as well as by applying bi-cubic interpolation in the final reconstruction step. In particular, the proposed method automatically suppresses the zero order term and virtual image. Unlike other similar approaches, the image can be reconstructed with large size accordingly. The proposed method facilitate the transverse high resolution of microscopic image with better applicability than others approaches. Moreover, the advantages of the method are its simplicity and convenience in data processing. © 2012 Newswood Limited. All rights reserved.