Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio

Hao Chen; Yiwei Liu; Qiuya Sun; Zhuqing Jiang

doi:10.1117/12.2600447

9 October 2021 Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio

Hao Chen, Yiwei Liu, Qiuya Sun, Zhuqing Jiang

Proceedings Volume 11898, Holography, Diffractive Optics, and Applications XI; 118981M (2021) https://doi.org/10.1117/12.2600447
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

In this paper, we present a method to eliminate the zero-order term in Fourier spectrum of off-axis digital holograms based on the linear change of the hologram. In a typical digital holographic setup, the three off-axis holograms are recorded by the object waves and the reference waves with the different intensity ratios. The three holograms were Fourier transformed, and then the spectra were linearly fitted to obtain two fitting coefficients. Then, the second and third holograms are multiplied by the corresponding coefficients, and the first hologram is subtracted from the hologram that is multiplied by the coefficient to obtain the hologram with the zero-order term eliminated. In the procedure of spectrum filtering, more high-frequency information can be intercepted in this spatial-frequency spectrum after removing the zero-order. The experiment results show that this method can obviously eliminate the zero-order term.

Citation Download Citation

Hao Chen, Yiwei Liu, Qiuya Sun, and Zhuqing Jiang "Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio", Proc. SPIE 11898, Holography, Diffractive Optics, and Applications XI, 118981M (9 October 2021); https://doi.org/10.1117/12.2600447

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