Accurate Image Locating by Hologram Multiplexing in Off-Axis Digital Holography Display

Abstract

An approach is suggested to recover and then locate the original object image in off-axis digital holography by the multiplexing of hologram (OADHM). The recording configuration is designed by introducing one more plane wave in the interference frame to carry the information for the tilt angle of the reference wave (TARW), which is crucial for the holography recovery and the accurate locating of the reconstructed image. The intensity distribution in a hologram plane and the corresponding spatial spectrum of two sets holograms in Fourier domain are analyzed theoretically. When the specific spectra that come from the interference of the two plane waves are detected, the TARW can be calculated by the coordinates of them and then the recovered image can be retrieved by spectrum operation and located at the original place. Series numerical simulations and optical experiments have been carried out to demonstrate the availability and efficiency of the proposed design.