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10 May 1986 The Effects Of Finite Beam Size Upon Wide-Angle Diffraction Phenomena
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Diffraction gratings are known to exhibit anomalous behavior at certain critical wavelengths or incident angles. These traditional anomalies manifest themselves as abrupt variations in diffracted order efficiency or grating absorption while their angular position remains unchanged as predicted by the grating equation. Experimental observations were recently reported which indicated a diffraction grating anomaly in the angular position of certain diffracted orders that appeared to violate the grating equation. Several exotic physical mechanisms have been suggested as possible causes of this intriguing behavior. In this paper we attempt to show that this angular grating anomaly is the straightforward result of finite beam size upon wide-angle diffraction phenomena as described by simple scalar diffraction theory.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James E. Harvey "The Effects Of Finite Beam Size Upon Wide-Angle Diffraction Phenomena", Proc. SPIE 0560, Diffraction Phenomena in Optical Engineering Applications, (10 May 1986);

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