Phase-shifting digital holography

Opt Lett. 1997 Aug 15;22(16):1268-70. doi: 10.1364/ol.22.001268.

Abstract

A new method for three-dimensional image formation is proposed in which the distribution of complex amplitude at a plane is measured by phase-shifting interferometry and then Fresnel transformed by a digital computer. The method can reconstruct an arbitrary cross section of a three-dimensional object with higher image quality and a wider viewing angle than from conventional digital holography using an off-axis configuration. Basic principles and experimental verification are described.