Abstract

Characteristics of the Fresnel field of a quasi-linear grating system illuminated by a coherent, quasi-spherical wave front are studied. The considerations are based on the analyses of changes of the Fourier spectrum during the field propagation through the gratings. The treatment given simplifies the problem to the case of a single diffraction grating illuminated by a wave front that contains complex information about the preceding gratings and the input aberrated beam. It also furnishes a straightforward explanation for the variations in the output field distribution caused by any change of parameters in the system.

© 1988 Optical Society of America

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