title: Parallel three-step phase-shifting digital holography.
abstract: We propose parallel three-step phase-shifting digital holography as a technique capable of noiseless instantaneous measurement of three-dimensional objects based on phase-shifting interferometry. The proposed digital holography carries out three-step phase shifting at the same time by using a phase-shifting array device located in the reference beam. The array device has a periodic three-step phase distribution, and its configuration is simplified compared with that required for conventional parallel phase-shifting digital holography. Therefore the optical system of the proposed parallel phase-shifting digital holography is more suitable for the realization of the proposed holography. We conduct both a numerical simulation and a preliminary experiment. The results of the simulation and experiment agree well with those of the conventional phase-shifting method and are superior to the results obtained by conventional digital holography by using the Fresnel transform alone. Thus the effectiveness of the proposed technique is verified.
authors.affiliation: Department of Electronics and Information Science, Kyoto Institute of Technology, Matsugasaki, Japan. awatsuji@dj.kit.ac.jp
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Awatsuji
authors.forename: Atsushi
authors.initials: A
authors.lastname: Fujii
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Kubota
authors.forename: Osamu
authors.initials: O
authors.lastname: Matoba