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Autor:
P.-A. Gourdain, I. N. Erez, M. Evans, H. R. Hasson, J. Nagasako, J. R. Young, I. West-Abdallah
Publikováno v:
Optics Continuum. 2:838
This paper shows analytically and numerically that a vortex plate coupled to a neutral density filter can deliver a true optical spatial derivative when placed at the focal plane of a 2f lens pair. This technique turns any intensity or phase variatio