We propose a new method for the analysis of light propagation through thick phase elements of homogeneous refractive index. The Laue equation is shown to be a generalization of Snell's law of refraction, yielding correct amplitude and phase changes at a single refracting surface. The application to blazed phase gratings is outlined.
© 1995 Optical Society of America
Wolfgang Singer and Karl-Heinz Brenner, "Transition of the scalar field at a refracting surface in the generalized Kirchhoff diffraction theory," J. Opt. Soc. Am. A 12, 1913-1919 (1995)