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Dispositif de réalité augmentée basé sur des concepts de couplage guide d'onde/hologramme

Abstract : The CEA-LETI research institute recently developed a novel retinal projection concept. The projection system is embedded on transparent glasses for augmented reality (AR) applications. The CEA-LETI concept aims to overcome current limitations of already commercialized AR glasses, such as complex and bulky optics. It uses a self-focusing effect to generate images directly on the retina of a user without any artificial optical components, allowing the creation of a fully integrated and portable device.The concept is separated into two main parts : an integrated photonic circuit and an analog hologram. This thesis focuses on the first part, i.e. the photonic circuit. The hologram is developed in parallel of the thesis by other team members.The thesis allowed to design, fabricate and experimentally characterize a design kit made of basic photonic components (ex: singlemode waveguide, various couplers, active optical switches…). They can be assembled in order to design the complex photonic circuit of the final retinal projection device. The photonic components are made of Si3N4 and were optimized to work specifically at λ = 532 nm (green). They were fabricated in clean rooms on 200 mm wafer platforms at the CEA-LETI and STMicroelectronics fabrication facilities. The characterization of the components was carried out with an automated optical prober and a goniometer. The goniometer was entirely designed and fabricated during the thesis for the purpose and the specific needs of this project. Finally, a simple applicative photonic circuit was designed to study the interaction between our photonic circuits and the analog hologram.
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Submitted on : Thursday, June 3, 2021 - 3:56:09 PM
Last modification on : Friday, June 4, 2021 - 3:20:58 AM


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  • HAL Id : tel-03223425, version 2




Basile Meynard. Dispositif de réalité augmentée basé sur des concepts de couplage guide d'onde/hologramme. Optique / photonique. Université Grenoble Alpes [2020-..], 2021. Français. ⟨NNT : 2021GRALT007⟩. ⟨tel-03223425v2⟩



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