Diffraction-engineered holography: Beyond the depth representation limit of holographic displaysopen access
- Authors
- Yang, Daeho; Seo, Wontaek; Yu, Hyeonseung; Kim, Sun Il; Shin, Bongsu; Lee, Chang-Kun; Moon, Seokil; An, Jungkwuen; Hong, Jong-Young; Sung, Geeyoung; Lee, Hong-Seok
- Issue Date
- Oct-2022
- Publisher
- NATURE PORTFOLIO
- Citation
- NATURE COMMUNICATIONS, v.13, no.1
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 13
- Number
- 1
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87286
- DOI
- 10.1038/s41467-022-33728-5
- ISSN
- 2041-1723
- Abstract
- Improving the image depth perception of holograms while maintaining high image quality is a current challenge. Here the authors propose an efficient solution relying on a multi-plane hologram technique that reconstruct different blurred images and sharply focused images depending on a propagation distance. Holography is one of the most prominent approaches to realize true-to-life reconstructions of objects. However, owing to the limited resolution of spatial light modulators compared to static holograms, reconstructed objects exhibit various coherent properties, such as content-dependent defocus blur and interference-induced noise. The coherent properties severely distort depth perception, the core of holographic displays to realize 3D scenes beyond 2D displays. Here, we propose a hologram that imitates defocus blur of incoherent light by engineering diffracted pattern of coherent light with adopting multi-plane holography, thereby offering real world-like defocus blur and photorealistic reconstruction. The proposed hologram is synthesized by optimizing a wave field to reconstruct numerous varifocal images after propagating the corresponding focal distances where the varifocal images are rendered using a physically-based renderer. Moreover, to reduce the computational costs associated with rendering and optimizing, we also demonstrate a network-based synthetic method that requires only an RGB-D image.
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