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3. Periodic masks (Talbot effect)
Periodization of pinholes can produce interesting effects in a configuration where FN < 1. Indeed, such a combination has the property of generating self-images that reproduce themselves periodically along the axis of propagation; this is the self-imaging effect or Talbot effect. Compared with coded masks, the Talbot effect makes it possible to project a pattern while mastering diffractive effects. It's a remarkable phenomenon, different from what can be obtained with refractive and reflective optics, and capable of producing lines or points of light without using the focusing principle. In the introduction to his article on this phenomenon, Patorski waxes lyrical about its scientific interest ...
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Periodic masks (Talbot effect)
Continuously self-imaging objects
Bibliography
Patents
M. Piponnier, J. Primot, G. Druart and N. Guérineau. Guérineau, "Method and device for telemetric imaging", FR2994735(B1), EP2700902(B1), US2014055606(A1), JP2014041126(A), CN103632161(A), 2012
Websites
https://en.wikipedia.org/wiki/Coded_aperture
https://en.wikipedia.org/wiki/Modified_Uniformly_Redundant_Array
Software tools
Unified optical design software " Wyrowski VirtualLab Fusion ", developed by Wyrowski Photonics UG, distributed and supported by LightTrans GmbH, Jena, Germany
Directory
The study of binary optics is an old discipline and belongs to the toolbox of the researcher/engineer who can revisit these concepts according to his or her application needs. The bulk of current work in photolithography is in the field of nanotechnology and plasmonics, which are not covered in this article. The teams mentioned below have published articles that inspired this article, or have carried out work known to the authors....
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