title: Generalized in-line digital holographic technique based on intensity measurements at two different planes.
abstract: In-line digital holography based on two-intensity measurements [Zhang Opt. Lett. 29, 1787 (2004)], is modified by introducing a pi shifting in the reference phase. Such an improvement avoids the assumption that the object beam must be much weaker than the reference beam in strength and results in a simplified experimental implementation. Computer simulations and optical experiments are carried out to validate the method, which we refer to as position-phase-shifting digital holography.
authors.affiliation: School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Ireland.
authors.forename: Guohai
authors.initials: G
authors.lastname: Situ
authors.forename: James P
authors.initials: JP
authors.lastname: Ryle
authors.forename: Unnikrishnan
authors.initials: U
authors.lastname: Gopinathan
authors.forename: John T
authors.initials: JT
authors.lastname: Sheridan