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23 December 2004 A new method for laser beam phase measurement by using the shear interferometer
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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 AF2 (fx, fy)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[ixφ(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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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