Optical homogeneity measurement of parallel plates by wavelength-tuning interferometry using nonuniform fast Fourier transform | Zendy

Renhui Guo | Zendy; Zhishan Liao | Zendy; Jianxin Li | Zendy; Aobo Li | Zendy; Pingping Song | Zendy; Rihong Zhu | Zendy

Open Access

Optical homogeneity measurement of parallel plates by wavelength-tuning interferometry using nonuniform fast Fourier transform

Author(s) -

Renhui Guo,

Zhishan Liao,

Jianxin Li,

Aobo Li,

Pingping Song,

Rihong Zhu

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.013072

Subject(s) - fast fourier transform , optics , interferometry , homogeneity (statistics) , wavelength , fourier transform , computer science , physics , algorithm , quantum mechanics , machine learning

Wavelength-tuning interferometry is commonly employed to measure the optical homogeneity of parallel plates. However, the nonlinearity of phase shifts caused by wavelength tuning errors and environmental vibration leads to a spatially uniform error in the calculated phase distribution. Herein, a wavelength-tuning interferometry method based on nonuniform fast Fourier transform (WTI-NUFFT) was developed, which solves the spectral aliasing resulting from the spatially uniform error. The characteristics of the WTI-NUFFT method were estimated through comparison with the FFT method. Both the simulated and experimental results showed that the WTI-NUFFT method can improve the accuracy of the optical homogeneity measurement of parallel plates.

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