Coarse integral holography approach for real 3D color video displays

Chen, Jingsheng; Smithwick, Q Y J; Chu, Daping

doi:10.1364/oe.24.006705

Cited by 30 publications

(18 citation statements)

References 28 publications

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“…Another problem of using a galvanometer is the fly-back issue, as the scanning is always forward and backward rather than uni-directional. It causes uneven frame rate for different viewing positions if only one line is scanned27.…”

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confidence: 99%

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

Jia

Chen

Yao

et al. 2017

Sci Rep

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A high quality 3D display requires a high amount of optical information throughput, which needs an appropriate mechanism to distribute information in space uniformly and efficiently. This study proposes a front-viewing system which is capable of managing the required amount of information efficiently from a high bandwidth source and projecting 3D images with a decent size and a large viewing angle at video rate in full colour. It employs variable gratings to support a high bandwidth distribution. This concept is scalable and the system can be made compact in size. A horizontal parallax only (HPO) proof-of-concept system is demonstrated by projecting holographic images from a digital micro mirror device (DMD) through rotational tiled gratings before they are realised on a vertical diffuser for front-viewing.

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confidence: 99%

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

Jia

Chen

Yao

et al. 2017

Sci Rep

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“…The color and grayscale of each pixel constituting the image is expressed by the pitch and orientation of the pixel grating . This dot‐matrix holography was initially designed to write dot‐matrix holograms for anticounterfeiting or decoration of commercial products, while it is now a digitized grating tool used in the field of arrays of microlasers and glass‐free 3D displays …”

Section: Maskless Nanofabrication Techniquesmentioning

confidence: 99%

Toward Scalable Flexible Nanomanufacturing for Photonic Structures and Devices

et al. 2016

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Continuous and scalable nanopatterning over flexible substrates is highly desirable for both commercial and scientific interests, but is difficult to realize with traditional photolithographic processes. The recent advancements in nanofabrication methodologies enable light management with photonic structures on flexible materials, providing an increasingly popular strategy to control the light harvesting in the optoelectronic devices of photovoltaics, and in organic and inorganic light-emitting diodes. Here, the current status of nanopatterning technologies for the fabrication of optoelectronic devices is summarized. Scalable nanopatterning technologies for nanomanufacturing on flexible materials are emphasized. Critical challenges in various patterning techniques when considering the resolution, scalability, processing throughput, and the use of masks and resists are addressed. The integration of flexible nanopatterned substrates with light manipulation in organic optoelectronic devices is also discussed; this enables the control of light flux and spectra. Finally, potential development directions are highlighted.

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“…Distributing this information for holographic 3D images requires careful system integration and the appropriate hologram computation. Our previous works in coarse integral holography (CIH) [6] and layer-based algorithms [7] were trying to deal with these difficulties. The principles of CIH will be briefly introduced shortly.…”

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confidence: 99%

“…CIH takes advantage of this concept and replaces the 2D image sources with holograms carrying 3D image information [6] . CIH further takes advantages of holograms to integrate the phase profile of the lenslet of the lens array used in coarse integral imaging into hologram calculations so the overall system is simpler and easier to implement.…”

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confidence: 99%

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Auxiliary resonant scanner to increase the scanning capability of coarse integral holographic displays

Chen

Smithwick

et al. 2017

Chin. Opt. Lett.

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This Letter proposes a scanned holographic display system that takes the advantage of a high-speed resonant scanner to augment a galvanometer and hence improves the opto-mechanical information distribution capabilities, thereby potentially achieving an increased image size and enlarged viewing angles.OCIS codes: 090.1995, 070.7345, 100.6890. doi: 10.3788/COL201715.040901. With the ability to provide all the necessary visual depth cues [1,2] , three-dimensional (3D) holographic displays have the potential to be the ultimate 3D images displays, attracting research efforts in the past decades [3,4] . To deliver 3D images with depth cues, the system needs to provide enough information with sufficient bandwidth both optically and digitally, regardless of the optical system.An example is illustrative of the requirements of a representative system. A 1000 × 1000 pixels phase-only hologram with a pixel pitch of 10 μm can project 3D images of 10 mm × 10 mm extent with a 3.6°× 3.6°viewing angle, assuming the wavelength is 633 nm (red light). The image size and the viewing angle are exchangeable, while their product is a constant because of the Lagrange invariant [5] . Having 50 mm × 50 mm × 10°× 10°× 3 ðR∕G∕BÞ × 30 frames∕ sec (fps) requires more than 17 Gpixels/sec. Note that shorter wavelengths, such as 520 nm (green) and 450 nm (blue), have smaller viewing angles than red light, so they require more bandwidths for the same visual range. Considering the necessary bits per pixel, which is expected to be 8 bits to meet the commercial graphic standard, the overall bandwidth will be more than 100 Gb/s. Furthermore, the size and the viewing angle of this example are smaller than what general applications need. It is likely that 1 Tb/s or more is necessary. Therefore, there is a need to develop high-bandwidth spatial light modulators (SLMs) to meet this requirement before a practical 3D holographic display is feasible.When we consider high-bandwidth devices, they can be categorized into two types: a high space bandwidth product (SBP) with a typical video rate frame rate, and a typical video-resolution SBP with a high frame rate. In the former case, for example, if the SLM can be made up to 100000 × 100000 pixels with 60 fps, it can directly be used to support a holographic image of a large image size and a wide viewing angle. Unfortunately, this is not feasible due to practical issues, such as pixel uniformity and the control of electronic signaling. Digital micro-mirror devices (DMDs) are a good example of the latter case. To fully utilize its bandwidth for holographic applications, there is a need to distribute frames efficiently so information contributes to visual imagery rather than being wasted. For example, a DMD supporting a 1024 × 768 frame resolution with 22727 fps provides 17 Gpixels/sec. Distributing this information for holographic 3D images requires careful system integration and the appropriate hologram computation. Our previous works in coarse integral holography (CIH) [6] and layer-based algorithms [7] we...

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Coarse integral holography approach for real 3D color video displays

Cited by 30 publications

References 28 publications

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

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

Toward Scalable Flexible Nanomanufacturing for Photonic Structures and Devices

Auxiliary resonant scanner to increase the scanning capability of coarse integral holographic displays

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