High-fidelity numerical realization of multiple-step Fresnel propagation for the reconstruction of digital holograms.
A cascaded Fresnel algorithm for the flexible reconstruction of digital holograms is proposed. Since the fast-Fourier-transform-based numerical realization of the Fresnel integral shows a dependency of its pixel resolution and its computation window size on the propagation distance different from that of the corresponding physical system, the computation window can be smaller than the actual physical diffraction field in the intermediate plane. Consequently, distortions in the final reconstruction may occur. A method is proposed to eliminate such distortion. The validity of this method is shown by both numerical simulations and experimental results.
Wang
Dayong
D
Institut für Technische Optik, Universität Stuttgart, Stuttgart, Germany. wdyong@bjut.edu.cn
Zhao
Jie
J
Zhang
Fucai
F
Pedrini
Giancarlo
G
Osten
Wolfgang
W