1. Optimal conditions for using the binary approximation of continuously self-imaging gratings
- Author
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Nicolas Guérineau, Guillaume Druart, Martin Piponnier, Jean-Louis de Bougrenet, Jérôme Primot, Département Optique (OPT), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), and Télécom Bretagne, Bibliothèque
- Subjects
Physics ,Depth of focus ,business.industry ,Physics::Optics ,Binary number ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Metrology ,010309 optics ,Optics ,Amplitude ,0103 physical sciences ,Talbot effect ,Transmittance ,Spatial frequency ,0210 nano-technology ,business ,Diffraction grating - Abstract
International audience; Diffractive Optical Elements (DOE), that generate a propagation-invariant transverse intensity pattern, can be used for metrology and imaging application because they provide a very wide depth of focus. However, exact implementation of such DOE is not easy, so we generally code the transmittance by a binary approximation. In this paper, we will study the influence of the binary approximation of Continuously Self-Imaging Gratings (CSIG) on the propagated intensity pattern, for amplitude or phase coding. We will thus demonstrate that under specific conditions, parasitic effects due to the binarization disappear and we retrieve the theoretical non-diffracting property of CSIG's.
- Published
- 2011