Abstract

A lensless holographic microscope was used to record a hologram of self-organised monolayers of micron-sized polystyrene spheres. By reconstructing the hologram digitally using a computer it was found that the original periodicity of the object produces planes of identical images, as well as planes that show reversed contrast images at separations predicted by the first-order approximation to the Talbot theory of the self-imaging effect. The performance of a compound light microscope is compared and contrasted with that of the holographic system, specifically examining the ability of the different systems to recover the distribution at the Talbot planes and to characterise properties of periodic structures. A theoretical model is developed and experimental results are presented.

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