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Proceedings Paper

Fresnel Images, Coherence Theory And The Lau Effect
Author(s): Ronald Sudol
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Paper Abstract

The Lau effect is observed when a double-grating pair is illuminated with spatially incoherent light. It would be of interest to generalize this experiment to include illuminating fields which have some degree of spatial coherence. To gain some insight into the changes the intensity distribution undergoes as the degree of spatial coherence is varied, we consider the special case of completely coherent illumination. This particular problem is easily discussed in terms of Fresnel images where it is found that the Fresnel image planes are defined by distances which are identical to the allowed grating separations in the incoherent Lau experiment. This suggests an interesting relationship between the nature of the fields in the incoherent Lau experiment and those in the coherent formation of Fresnel images.

Paper Details

Date Published: 10 February 1981
PDF: 10 pages
Proc. SPIE 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I, (10 February 1981); doi: 10.1117/12.965650
Show Author Affiliations
Ronald Sudol, University of Rochester (United States)


Published in SPIE Proceedings Vol. 0240:
Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I
C. H. Chi; E. G. Loewen; C. L. O'Bryan III, Editor(s)

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