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Noise reduction of dual-wavelength digital holography based on a shorter synthetic-wavelength
Author(s): Meng Huang; Yibo Wang; Hongpeng Qin; Zhuqing Jiang
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Paper Abstract

A noise reduction method based on a shorter synthetic-wavelength in DWDH is proposed in this paper. The unwrapped phase at longer synthetic-wavelength is calculated by using the wrapped phases of two individual wavelengths. By comparing the amplified phase of longer synthetic wavelength, of which magnification is equal to that of wavelengths with the wrapped phase of a single wavelength, the difference of phase noises between the longer synthetic-wavelength phase map and the single-wavelength phase map can be calculated, and then accurate height at single-wavelength can be achieved. The proposed method for calculating phase noise is performed by comparing the phases between the single-wavelength with the shorter synthetic wavelength, and then the height at shorter synthetic-wavelength can be obtained. Compared with the existing method, the proposed method can reduce certain noise and benefit the phase reconstruction of fine structures.

Paper Details

Date Published: 18 November 2019
PDF: 10 pages
Proc. SPIE 11188, Holography, Diffractive Optics, and Applications IX, 111882D (18 November 2019); doi: 10.1117/12.2538895
Show Author Affiliations
Meng Huang, Beijing Univ. of Technology (China)
Quzhou Univ. (China)
Yibo Wang, Beijing Univ. of Technology (China)
Hongpeng Qin, Beijing Univ. of Technology (China)
Zhuqing Jiang, Beijing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11188:
Holography, Diffractive Optics, and Applications IX
Yunlong Sheng; Changhe Zhou; Liangcai Cao, Editor(s)

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