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Abolhassani M. Theoretical treatment of the Lau Effect Based on Fresnel Diffraction integral and Fourier Series. ICOP & ICPET _ INPC _ ICOFS 2015; 21 :137-140
URL: http://opsi.ir/article-1-496-en.html
URL: http://opsi.ir/article-1-496-en.html
Arak University
Abstract: (4223 Views)
A theoretical explanation of the Lau effect is presented based on Fresnel diffraction theory and Fourier series representation of a grating function. It is shown that, in the case of amplitude diffracting grating, for some gratings separations which are equal to an even multiple of an elementary distance, the intensity distribution function at output plane in Lau setup is similar to transmittance of the diffracting grating. For the gratings distances equal to an odd multiple of the elementary distance the output intensity functions are periodic ones with only even frequencies.
Keywords: The Lau effect, Diffraction grating
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