Shrinkage effects in holographic couplers for see-through applications recorded in photopolymers

Joan Josep Sirvent-Verdú; Juan Carlos Bravo; Carla Piñol-Galera; Cristian Neipp; Sergi Gallego; Augusto Beléndez

doi:10.1117/12.3014927

18 June 2024 Shrinkage effects in holographic couplers for see-through applications recorded in photopolymers

Joan Josep Sirvent-Verdú, Juan Carlos Bravo, Carla Piñol-Galera, Cristian Neipp, Sergi Gallego, Augusto Beléndez

Author Affiliations +

Proceedings Volume 13015, Photosensitive Materials and their Applications III; 1301506 (2024) https://doi.org/10.1117/12.3014927
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The see-through application of holographic optical elements (HOEs) has gained a lot of attention in the scientific literature in recent years. Regarding this kind of holograms recorded in photopolymers, the shrinkage plays an important role in the final properties of the display, as it may alter the Bragg angle. The present work is focused on the characterization of a HOE as a coupler in a waveguide combiner, recorded in holographic transmission geometry without prisms in the experimental set-up. From this point of view, it has been found that for specific geometries where the diffracted beam cannot be trapped a priori, a significant coupling effect exists: this variation in the diffracted energy and the propagation angle inside the glass can be used to measure the shrinkage of the photopolymer for this HOEs recording.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Joan Josep Sirvent-Verdú, Juan Carlos Bravo, Carla Piñol-Galera, Cristian Neipp, Sergi Gallego, and Augusto Beléndez "Shrinkage effects in holographic couplers for see-through applications recorded in photopolymers", Proc. SPIE 13015, Photosensitive Materials and their Applications III, 1301506 (18 June 2024); https://doi.org/10.1117/12.3014927

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