Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input
To reveal the fundamental characteristic of the volume holographic waveguide for a head-mounted display (HMD), we analyzed the resolution of a virtual image. We built a mathematical model considering the off-Bragg diffraction for each ray angle of the signal light ray. The display resolution perform...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/9/649 |
| _version_ | 1797483555739140096 |
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| author | Toshiteru Nakamura Ryushi Fujimura |
| author_facet | Toshiteru Nakamura Ryushi Fujimura |
| author_sort | Toshiteru Nakamura |
| collection | DOAJ |
| description | To reveal the fundamental characteristic of the volume holographic waveguide for a head-mounted display (HMD), we analyzed the resolution of a virtual image. We built a mathematical model considering the off-Bragg diffraction for each ray angle of the signal light ray. The display resolution performance of the HMD depended on the thickness of the waveguide and the ray angle. At the lowest-resolution ray angle, the input-point image was broadened more than 0.1° in a viewing angle for a 1-mm-thick waveguide. Conversely, our previously proposed line-symmetric image-input method, in which the input images were symmetrically arranged with respect to the center line, improved the resolution performance and luminance uniformity. We observed that the spread of the point image was suppressed to 0.01°, which was a sufficient resolution for a person with a visual acuity of 0.8. |
| first_indexed | 2024-03-09T22:48:42Z |
| format | Article |
| id | doaj.art-bc626af92f6d4cb79a81278dffe545e8 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T22:48:42Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-bc626af92f6d4cb79a81278dffe545e82023-11-23T18:24:58ZengMDPI AGPhotonics2304-67322022-09-019964910.3390/photonics9090649Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image InputToshiteru Nakamura0Ryushi Fujimura1Graduate School of Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi 321-8585, JapanGraduate School of Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi 321-8585, JapanTo reveal the fundamental characteristic of the volume holographic waveguide for a head-mounted display (HMD), we analyzed the resolution of a virtual image. We built a mathematical model considering the off-Bragg diffraction for each ray angle of the signal light ray. The display resolution performance of the HMD depended on the thickness of the waveguide and the ray angle. At the lowest-resolution ray angle, the input-point image was broadened more than 0.1° in a viewing angle for a 1-mm-thick waveguide. Conversely, our previously proposed line-symmetric image-input method, in which the input images were symmetrically arranged with respect to the center line, improved the resolution performance and luminance uniformity. We observed that the spread of the point image was suppressed to 0.01°, which was a sufficient resolution for a person with a visual acuity of 0.8.https://www.mdpi.com/2304-6732/9/9/649augmented realityhead-mounted displaywaveguidevolume hologramoff-Bragg diffractionresolution |
| spellingShingle | Toshiteru Nakamura Ryushi Fujimura Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input Photonics augmented reality head-mounted display waveguide volume hologram off-Bragg diffraction resolution |
| title | Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input |
| title_full | Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input |
| title_fullStr | Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input |
| title_full_unstemmed | Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input |
| title_short | Analysis of Display Resolution of Volume Holographic Waveguide and High Resolution by Line-Symmetric Image Input |
| title_sort | analysis of display resolution of volume holographic waveguide and high resolution by line symmetric image input |
| topic | augmented reality head-mounted display waveguide volume hologram off-Bragg diffraction resolution |
| url | https://www.mdpi.com/2304-6732/9/9/649 |
| work_keys_str_mv | AT toshiterunakamura analysisofdisplayresolutionofvolumeholographicwaveguideandhighresolutionbylinesymmetricimageinput AT ryushifujimura analysisofdisplayresolutionofvolumeholographicwaveguideandhighresolutionbylinesymmetricimageinput |