A scalable diffraction-based scanning 3D colour video display as demonstrated by using tiled gratings and a vertical diffuser

Jia, Jia; Chen, Jhen-Si; Yao, Jun; Chu, Daping

doi:10.1038/srep44656

Cited by 25 publications

(16 citation statements)

References 41 publications

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“…Among the technologies to pursue projection of realistic 3D images [2, 4, 35, 36], autostereoscopic displays give 3D sensation without the need for viewing glasses [37]. When the number of view images is sufficient, multiview autostereoscopic displays mimic the parallax generated by a realistic 3D object [38, 39].…”

Section: Resultsmentioning

confidence: 99%

“…Alternatively, a 3D image can be mimicked by displaying appropriate discrete two-dimensional (2D) images. Layer-based methods [4] project multiple 2D images at depths of a 3D image, while stereoscopic displays [5] and multiview displays [6] project discrete 2D images viewed at different angles. Stereoscopic 3D displays benefit from the convergence cue of human vision and deliver two images to the two eyes.…”

Section: Introductionmentioning

confidence: 99%

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Encoding and Multiplexing of 2D Images with Orbital Angular Momentum Beams and the Use for Multiview Color Displays

Chu

Smithwick

2019

Research

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The orthogonal nature of different orbital angular momentum modes enables information transmission in optical communications with increased bandwidth through mode division multiplexing. So far the related works have been focused on using orbital angular momentum modes to encode/decode and multiplex point-based on-axis signals for maximum data channel numbers and capacity. Whether orbital angular momentum modes can be utilized to encode/decode off-axis signals for multiplexing in two-dimensional space is of significant importance both fundamentally and practically for its enormous potential in increasing the channel information capacity. In this work, a direct use of orbital angular momentum modes to encode/decode and multiplex two-dimensional images is realized in a scalable multiview display architecture, which can be utilized for viewing three-dimensional images from different angles. The effect of off-axis encoding/decoding and the resultant crosstalk between multiplexed different two-dimensional views are studied. Based on which, a color display of good image quality with four independent views is demonstrated. The resolution of the decoded images is analyzed and the limitation of this approach discussed. Moreover, a spatially multiplexed data communication scheme is also proposed with such a two-dimensional encoding/decoding approach to significantly enhance the data transmission capacity in free space for future data communication needs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Encoding and Multiplexing of 2D Images with Orbital Angular Momentum Beams and the Use for Multiview Color Displays

Chu

Smithwick

2019

Research

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“…Because of recent growth of industrial fields related to digital holographic and compact integrated optical device technologies, the use of light diffraction as a key technology has become tremendously important. This includes light display via spatial light modulators, image sensing and the precise extraction of external information through sophisticated lens systems [1][2][3][4][5][6][7][8][9][10]. Diffraction is a representative characteristic of light waves, and it is well known that when a plane wave is transmitted or reflected in a gridded periodic structure, multiple degrees of diffraction occur at specific angles based on the diffraction law.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Diffraction in Plasmonic Meta-Gratings Using an IT-Shaped Nanoslit Array

Jeong

Moon

Lee

2021

Sensors

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Diffraction is a fundamental phenomenon that reveals the wave nature of light. When a plane wave is transmitted or reflected from a grating or other periodic structures, diffracted light waves propagate at several angles that are specified by the period of the given structure. When the optical period is shorter than the wavelength, constructive interference of diffracted light rays from the subwavelength-scale grating forms a uniform plane wave. Many studies have shown that through the appropriate design of meta-atom geometry, metasurfaces can be used to control light properties. However, most semitransparent metasurfaces are designed to perform symmetric operation with regard to diffraction, meaning that light diffraction occurs identically for front- and back-side illumination. We propose a simple single-layer plasmonic metasurface that achieves asymmetric diffraction by optimizing the transmission phase from two types of nanoslits with I- and T-shaped structures. As the proposed structure is designed to have a different effective period for each observation side, it is either diffractive or nondiffractive depending on the direction of observation. The designed structure exhibits a diffraction angle of 54°, which can be further tuned by applying different period conditions. We expect the proposed asymmetric diffraction meta-grating to have great potential for the miniaturized optical diffraction control systems in the infrared band and compact optical diffraction filters for integrated optics.

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“…Holographic video is considered the holy-grail of 3D auto-stereo displays because it can generate the desired wavefronts which provide the reconstructed images with all the necessary 3D visual cues [1][2][3][4][5][6]. The information content of a hologram is usually represented by the space bandwidth product (SBP) and the optical extent which is the product of area and fields-of-view (FOV) of the reconstructed light controllable by the hologram [7].…”

Section: Introductionmentioning

confidence: 99%

“…The optical extent reaches ~10 6 mm 2 .deg 2 . However, a single spatial light modulator (SLM) of 1024×768 pixels with a pixel size of 13μm×13μm has the space bandwidth product SBP = 3.14×10 6 and the optical extent AΩ=257.64 mm 2 .deg 2 . The required optical extent is approximately 3881 times of a single SLM.…”

Section: Introductionmentioning

confidence: 99%

Scalable coarse integral holographic video display with integrated spatial image tiling

Smithwick

Chu

2020

Opt. Express

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The dynamic Coarse Integral Holography (CIH) display demonstrated previously can scan the low space bandwidth product (SBP) holographic images delivered by a high bandwidth spatial light modulator (SLM) to form a hologram array for angular tiling of the 3D images for a large field-of-view but only a modest size despite the utilization of the full bandwidth of the SLM in use. In this paper, we propose a scalable approach using seamless spatial tiling of the full bandwidth images generated by two high bandwidth SLMs using a resonant scanner and a high performance galvanometric scanner for a scalable CIH display capable of achieving twice of the final image size and doubled horizontal field-of-view (FOV). A proof-of-concept system is demonstrated with integrated full-parallax holographic 3D images. The proposed method has the potential to tile images generated by more than two SLMs for scalable large size and wide FOV holographic displays.

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A scalable diffraction-based scanning 3D colour video display as demonstrated by using tiled gratings and a vertical diffuser

Cited by 25 publications

References 41 publications

Encoding and Multiplexing of 2D Images with Orbital Angular Momentum Beams and the Use for Multiview Color Displays

Encoding and Multiplexing of 2D Images with Orbital Angular Momentum Beams and the Use for Multiview Color Displays

Asymmetric Diffraction in Plasmonic Meta-Gratings Using an IT-Shaped Nanoslit Array

Scalable coarse integral holographic video display with integrated spatial image tiling

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