Waveguide-type Multidirectional Light Field Displayopen access
- Authors
- Rah, Hyungju; Lee, Seungmin; Ryu, Yeong Hwa; Park, Gayeon; Song, Seok Ho
- Issue Date
- Aug-2022
- Publisher
- 한국광학회
- Keywords
- 3D display; Grating diffraction efficiency; Light field display
- Citation
- Current Optics and Photonics, v.6, no.4, pp.375 - 380
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Current Optics and Photonics
- Volume
- 6
- Number
- 4
- Start Page
- 375
- End Page
- 380
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185383
- DOI
- 10.3807/COPP.2022.6.4.375
- ISSN
- 2508-7266
- Abstract
- We demonstrate two types of light field displays based on waveguide grating coupler arrays: a line beam type and a point source type. Ultra violet imprinting of an array of diffractive nanograting cells on the top surface of a 50-μm-thin slab waveguide can deliver a line beam or a point beam to a multidirectional light field out of the waveguide slab. By controlling the grating vectors of the nanograting cells, the waveguide modes are externally coupled to specific viewing angles to create a multidirectional lightfield display. Nanograting cells with periods of 300 nm–518 nm and slanted angles of −8.5°–+8.5° are fabricated by two-beam interference lithography on a 40 mm × 40 mm slab waveguide for seven differ-ent viewpoints. It is expected that it will be possible to realize a very thin and flexible panel that shows multidirectional light field images through the waveguide-type diffraction display.
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