Components and optical systems for the activation of pixelated holograms, application to retinal display

Published : 19 March 2019

The PhD is forming part of a research activity in our laboratory about retinal projection for Augmented Reality (AR) applications. Current AR devices (smart glasses) are limited in their design by the constraints given by the optical systems. The use of the device in a social context is still difficult to be implemented commercially because of the lack of aesthetic that discourages the user.

To overcome these limitations related to the pupil management in the axial optical systems, CEA Leti is investigating the use of pixelated holograms, distributed on the surface of the glass and addressed by a grid of single mode waveguides and electrodes. The PhD will focus on the development of the technological brick related to the activation of the holograms.

The work will consist in the recording of pixelated holograms on the holographic printer of the laboratory. A series of optical set-up will then be implemented to demonstrate the dynamic addressing of the holographic function. These set-ups will concern first simple free space propagation with the use of DLP and will progressively migrate to integrated photonics devices in relation to our development in Silicon Photonics and Liquid Cristal Devices.

The use of these set-ups concerns retinal projection but the PhD student will also be in charge to investigate other domains of application (3Dimaging/sensing, Lidar technologies, …).

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