Statistical generalized phase-shifting digital holography with a continuous fringe-scanning scheme.

Abstract

We propose a novel statistical generalized phase-shifting digital holography using a continuous fringe-scanning scheme. In this method, the continuous fringe-scanning scheme is implemented using a PC-based measurement system without any synchronous circuit between the digital camera and the phase shifter. Thus, nonuniformly phase-shifted interference fringes are captured sequentially because of the fluctuation of the image-capturing interval. To cope with the nonuniform phase shifts, we employ a statistical generalized phase-shifting approach. Since the algorithm is designed to use an arbitrary phase shift, the nonuniform phase shifts do not obstruct object wave retrieval. Simulations and experiments demonstrate that the proposed method can be used to implement a practical and accurate digital holography system.