A new method for laser beam phase measurement by using the shear interferometer

Yingjian Wang; Yinbo Huang; Zhenbo Bi

doi:10.1117/12.580773

23 December 2004 A new method for laser beam phase measurement by using the shear interferometer

Yingjian Wang, Yinbo Huang, Zhenbo Bi

Proceedings Volume 5639, Adaptive Optics and Applications III; (2004) https://doi.org/10.1117/12.580773
Event: Photonics Asia, 2004, Beijing, China

Abstract

A new method, named FSI (Fourier Shear Interferometry), is suggested to calculate the phase derivative by Fourier transform of the lateral shear fringes. After filtering intensity spectrum A_F² (f_x, f_y)in the spectrum of the shear fringes, the cross term of the fringe’s intensity, i.e., A(x,y)A(x + s, y)exp[i▵_xφ(x,y)], is obtained by the reverse Fourier transform, and then ▵φ(x, y) can be easily obtained if only |▵φ(x, y)|less than or equal to π. The numerical simulation results demonstrate feasibility and accuracy of the suggested method.

Citation Download Citation

Yingjian Wang, Yinbo Huang, and Zhenbo Bi "A new method for laser beam phase measurement by using the shear interferometer", Proc. SPIE 5639, Adaptive Optics and Applications III, (23 December 2004); https://doi.org/10.1117/12.580773

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