Skip to Main content Skip to Navigation
Theses

Phototraçage massivement parallèle, multirésolution et multiprofondeur de microstructures et nanostructures diffractantes pour les applications antifraudes

Abstract : Diffractive optical structures on the fon of security holograms are widely used against forgery and counterfeiting. They are present on banknotes, travel and identity documents, etc. Their manufacturing techniques are becoming more and more accessible, increasing the risk of fraud and competition in the security hologram market. To stem fraud and gain market share, hologram procedures must innovate continously. This Ph.d focuses on the development of innovative multi-scale diffractive optical structures. These multi-scale diffractive structures result from combination of microscopic diffractive structures that shape the incident light and nanoscopic structures that generate colored effects. This work places emphasis on the development of the massively parallel-direct-write greyscale photolithography fabrication process.We also discuss the development of an hybrid model for physically simulating the behaviour of diffractive structures (especially our multiscale structures) in real time. This real time rendering is possible thanks to the use of the graphical processor unit (GPU) through OpenGL and Shader programs, as well as the use of precomputed data. The development of these multiscale structures has led to the creation and commercialisation of many new visual effects and contributed to the dual objectives of counter fraud and gain market share.
Complete list of metadatas

Cited literature [76 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02507339
Contributor : Nathalie Fontaine <>
Submitted on : Friday, March 13, 2020 - 9:28:07 AM
Last modification on : Tuesday, October 20, 2020 - 10:53:09 AM
Long-term archiving on: : Sunday, June 14, 2020 - 1:23:38 PM

File

2019IMTA0156_Pigeon-Yoran-Eli_...
Files produced by the author(s)

Identifiers

  • HAL Id : tel-02507339, version 1

Citation

Yoran Eli Pigeon. Phototraçage massivement parallèle, multirésolution et multiprofondeur de microstructures et nanostructures diffractantes pour les applications antifraudes. Optique / photonique. Ecole nationale supérieure Mines-Télécom Atlantique, 2019. Français. ⟨tel-02507339⟩

Share

Metrics

Record views

69

Files downloads

100