Non-iterative phase hologram generation for color holographic display

Cheng, Zhang; Wu, Feng; Zhou, Jiantao; Wei, Sui

doi:10.1364/oe.441375

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…However, this iterative approach results in longer times for a new ORAP generation and limited flexibility. To overcome the limitations of ORAP, this paper uses the Full Support Optimized Random Phase (FS-ORAP) method [14]. The FS-ORAP method tackles the constraints of ORAP by replacing the fixed support with full support in the spatial domain, resulting in a single FS-ORAP.…”

Section: Full Support Optimized Random Phase Methodsmentioning

confidence: 99%

Non-iterative 3D computer-generated hologram based on single full-support optimized random phase and phase compensation

Zhang,

Han,

Shi

et al. 2024

New J. Phys.

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The main problem faced by traditional three-dimensional (3D) holographic displays is the time-consuming and poor flexibility of the hologram generation process. To address this issue, this paper proposes a non-iterative 3D computer-generated hologram (SFS-ORAP-PC-3D) method based on single full-support optimized random phase and phase compensation. Combining the full-support optimized random phase (FS-ORAP) method and the 3D layer-based idea to efficiently and non-iteratively generate the phase-only hologram of a 3D object with arbitrary positions and sizes using single FS-ORAP, thus overcoming the limitations of the original ORAP method in target position and size. Meanwhile, using a Fresnel lens for phase compensation allows for free selection of reconstruction planes. Numerical and optical experiments validate the feasibility of our proposed method.

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Section: Full Support Optimized Random Phase Methodsmentioning

confidence: 99%

Non-iterative 3D computer-generated hologram based on single full-support optimized random phase and phase compensation

Zhang,

Han,

Shi

et al. 2024

New J. Phys.

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“…The utilization of constant phase and quadratic phase is driven by a demand for speckle suppression in CGH. The pre-optimized phase is utilized to develop a less iterative 106 , 107 or noniterative 108 – 110 approach to quickly generate holograms, which greatly accelerates the computation. As is shown in Fig.…”

Section: Frameworkmentioning

confidence: 99%

Non-convex optimization for inverse problem solving in computer-generated holography

Sui,

He,

Chu

et al. 2024

Light Sci Appl

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Computer-generated holography is a promising technique that modulates user-defined wavefronts with digital holograms. Computing appropriate holograms with faithful reconstructions is not only a problem closely related to the fundamental basis of holography but also a long-standing challenge for researchers in general fields of optics. Finding the exact solution of a desired hologram to reconstruct an accurate target object constitutes an ill-posed inverse problem. The general practice of single-diffraction computation for synthesizing holograms can only provide an approximate answer, which is subject to limitations in numerical implementation. Various non-convex optimization algorithms are thus designed to seek an optimal solution by introducing different constraints, frameworks, and initializations. Herein, we overview the optimization algorithms applied to computer-generated holography, incorporating principles of hologram synthesis based on alternative projections and gradient descent methods. This is aimed to provide an underlying basis for optimized hologram generation, as well as insights into the cutting-edge developments of this rapidly evolving field for potential applications in virtual reality, augmented reality, head-up display, data encryption, laser fabrication, and metasurface design.

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“…2, inspiring by the Refs. [12] and [13], the optimized phase is generated by the full-support iterative process. To get a better suppression effect of speckle noise, the random phase, whose phase range is limited in the first time in our method.…”

Section: Fig 1 Schematic Of a Dual-view 3d Display Based On An Hsmentioning

confidence: 99%

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

He,

Wang,

Wang

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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Holographic stereogram, as a marriage of holography and multi-view display technique, benefits of these two 3D display technologies. Recent research about the dual-view holographic stereogram 3D display technology shows an attractive way to present the visual information. However, due to the utilization of the random phase to smooth the spatial frequency spectrum, the troublesome of the quality of reconstructed images from holographic stereograms are those images containing speckle noise. In this paper, inspiring by the works about the computer-generated holograms, we introduced an optimized phase for the generation of dual-view holographic stereogram based on integral imaging to get a better suppression effect of speckle noise. The key goal is to determine the complex amplitude employed to calculate the holographic stereogram. Firstly, the pickup process of multiple parallax images corresponding to the left-view field and right-view field are finished by the virtual cameras. Then, the optimized phase is generated by the full-support iterative process, whose phase range is limited in the first time. Next, instead of the random phase, it is combined with corresponding parallax image to yield the complex amplitude. Holographic stereogram plane is segmented into many element holograms and each of them is generated by the Fourier transforming of the above complex amplitude. The phase of each complex element holograms is retained to generated the phase-only holographic stereogram, which have higher diffraction efficiency and no conjugate image than amplitude type holographic stereogram. Finally, the two set of holograms are combined together to reconstruct the corresponding dual-view. The optimized phase as the initial phase is demonstrated by simulations, the comparison of the simulated reconstructions shows that the method of this paper could improve the reproduction quality of the dual-view holographic stereogram, that extended its applicability and practicality.

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Non-iterative phase hologram generation for color holographic display

Cited by 11 publications

References 18 publications

Non-iterative 3D computer-generated hologram based on single full-support optimized random phase and phase compensation

Non-iterative 3D computer-generated hologram based on single full-support optimized random phase and phase compensation

Non-convex optimization for inverse problem solving in computer-generated holography

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

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