Modelling color breaking in a holographic-optical-element based augmented reality display: effects on waveguide thickness

Zih Fan Chen; Shiuan Huei Lin; Vera Marinova; Ken Y. Hsu

doi:10.1117/12.2677319

5 October 2023 Modelling color breaking in a holographic-optical-element based augmented reality display: effects on waveguide thickness

Zih Fan Chen, Shiuan Huei Lin, Vera Marinova, Ken Y. Hsu

Author Affiliations +

Proceedings Volume 12682, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII; 126820S (2023) https://doi.org/10.1117/12.2677319
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

In this paper, we present theoretic modelling of color breaking in a holographic-optical-element based Augmented Reality (AR) display. We first build up a theoretic optical model of the AR display system using scalar diffraction method. The discussions about the design parameters of holographic optical elements (HOE) for Augmented Reality (AR) glasses, focusing on color uniformity as a function of the waveguide thickness are conducted. It can be used to evaluate the color breaking of a displayed white image from user’s point of view. The simulation results show that color breaking occurs due to the limitations of pupil size and image shifting caused by the extended eye-box. Moreover, the thickness of the waveguide also causes uneven color distribution. Our model can also provide a way to analyze the relationship between waveguide thickness and color uniformity. In addition, based on those results, we propose a color correction algorithm by applying a pre-compensation scheme to the R/G/B values of each display pixel. Results show light display colors can be better corrected in the wider region of user’s field of view. It demonstrates the feasibility of compensation of color breaking in a holographic-optical-element based AR display.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zih Fan Chen, Shiuan Huei Lin, Vera Marinova, and Ken Y. Hsu "Modelling color breaking in a holographic-optical-element based augmented reality display: effects on waveguide thickness", Proc. SPIE 12682, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII, 126820S (5 October 2023); https://doi.org/10.1117/12.2677319

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