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

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

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5639...83w&link_type=abstract

Adaptive Optics and Applications III. Edited by Jiang, Wenhan; Suzuki, Yoshiji. Proceedings of the SPIE, Volume 5639, pp. 83-8

Physics

Optics

1

Scientific paper

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[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.

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