Answers are grounded in this paper and cite their sources.
A method is derived for obtaining more-intense multiple images. The method is based upon spatial-frequency filtering with auxiliary sampling. This method is derived and realized physically. The spatial filter, composed of periodically spaced holes in a black screen, is placed in the Fourier plane of the two-dimensional object. Filters were used that included auxiliary lattices of the same period, translated from each other by arbitrary vectors; consequently the multiple images that are formed in the image plane are superimposed and reinforce each other.
No takes yet. Share an insight, caveat, or question.
A. Kalestyński (1975) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: