Complex amplitude reconstruction based on the spatial carrier phase-shifting method in off-digital holography

Wenjian Wang; Huaying Wang; Xue Wang; Jialiang Lei; Jieyu Wang; Zhao Dong

doi:10.1117/12.2577413

7 October 2020 Complex amplitude reconstruction based on the spatial carrier phase-shifting method in off-digital holography

Wenjian Wang, Huaying Wang, Xue Wang, Jialiang Lei, Jieyu Wang, Zhao Dong

Author Affiliations +

Proceedings Volume 11571, Optics Frontier Online 2020: Optics Imaging and Display; 115710A (2020) https://doi.org/10.1117/12.2577413
Event: Optics Frontiers Online 2020: Optics Imaging and Display (OFO-1), 2020, Shanghai, China

Abstract

The complex amplitudes are usually extracted by windowing the Fourier spectra in the off-axis digital holography. However, it often needs manual operation. In order to obtain the complex amplitude automatically from a single off-axis hologram, the spatial carrier frequency phase shifting method is used in this work. Based on the fact that the complex amplitude to retrieve usually vary slowly and the carrier frequency keeps constant, three consecutive phase-shifting interferograms are obtained using the neighboring pixels along the same line in the hologram. Then the complex amplitude is calculated out. Without Fourier transforms, the computational complexity here is much smaller than that of the traditional one. Simulative and experimental results show that this method can really improve the processing efficiency during the complex amplitude reconstruction, and it can be used for automatic application of the digital offaxis holography.

Citation Download Citation

Wenjian Wang, Huaying Wang, Xue Wang, Jialiang Lei, Jieyu Wang, and Zhao Dong "Complex amplitude reconstruction based on the spatial carrier phase-shifting method in off-digital holography", Proc. SPIE 11571, Optics Frontier Online 2020: Optics Imaging and Display, 115710A (7 October 2020); https://doi.org/10.1117/12.2577413

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