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-Yuh Hsu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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 cause 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.

Original languageEnglish
Title of host publicationPhotonic Fiber and Crystal Devices
Subtitle of host publicationAdvances in Materials and Innovations in Device Applications XVII
EditorsShizhuo Yin, Ruyan Guo
PublisherSPIE
ISBN (Electronic)9781510665781
DOIs
StatePublished - 2023
EventPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII 2023 - San Diego, United States
Duration: 20 Aug 2023 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12682
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII 2023
Country/TerritoryUnited States
CitySan Diego
Period20/08/23 → …

Keywords

  • Color uniformity
  • Diffraction optical elements
  • Full-color AR system
  • Holographic Optical elements
  • Waveguide thickness

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