Physical and geometrical hybrid design of two-layer and depth-chirped holographic image guide for see-through glass type head mounted display

Toshiteru Nakamura, Yuzuru Takashima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We designed the image guide with discretely depth-chirped holographic grating for head mounted display to equalize luminance over the Field of View (FOV) and increase throughput. To reduce the time required to optimize depth-chirped pattern, the mathematical optical efficiency prediction method was devised. The design approach enables, rapid turnaround in design process and precise prediction of optical performance of image guide incorporated depth-chirped grating. Display performance of the depth-chirped image guide identified by the mathematical optimization was verified by the geometrical and physical hybrid optical simulation that the RCWA code is integrated to geometrical ray trace code via DLL to incorporate effects of the diffraction. As a results, the design exhibited 315 cd/m 2 /lm for the FOV (35° (H) x 20° (V)) and eye box size (±8.5 mm (H), ±6.5 mm (V)). The value of luminance was increased by 37% than unchirped image guide. Uniformity of luminance was further improved, from 33% to 47%. In conclusion, we made clear the effect of depth-chirped image guide to increasing the performance of the image guide.

Original languageEnglish (US)
Title of host publicationOptical Data Storage 2018
Subtitle of host publicationIndustrial Optical Devices and Systems
EditorsYuzuru Takashima, Ryuichi Katayama
PublisherSPIE
ISBN (Electronic)9781510620858
DOIs
StatePublished - Jan 1 2018
Event5th Optical Data Storage 2018: Industrial Optical Devices and Systems, ODS 2018 - San Diego, United States
Duration: Aug 19 2018 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10757
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference5th Optical Data Storage 2018: Industrial Optical Devices and Systems, ODS 2018
CountryUnited States
CitySan Diego
Period8/19/18 → …

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Keywords

  • Head mounted display
  • depth-chirped
  • image guide
  • uniformity of luminance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Nakamura, T., & Takashima, Y. (2018). Physical and geometrical hybrid design of two-layer and depth-chirped holographic image guide for see-through glass type head mounted display. In Y. Takashima, & R. Katayama (Eds.), Optical Data Storage 2018: Industrial Optical Devices and Systems [107570D] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10757). SPIE. https://doi.org/10.1117/12.2323239