High-Quality Holographic 3D Display System Based on Virtual Splicing of Spatial Light Modulator

Wang, Di; Li, Zhaosong; Zheng, Yao; Li, Nannan; Li, Yilong; Wang, Qiong‐Hua

doi:10.1021/acsphotonics.2c01514

Cited by 28 publications

(9 citation statements)

References 45 publications

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“…As one of the most promising 3D display technologies, holographic 3D display can record and reconstruct the wavefront information of the 3D objects completely [1][2]. However, the huge amount of calculation affects the speed of hologram generation, and the achievement of real-time dynamic holographic 3D display is limited [3].…”

Section: Introductionmentioning

confidence: 99%

Fast calculation method of hologram based on diffraction optimization

Huang,

Wang,

Hou

et al. 2024

Advances in Display Technologies XIV

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Holographic 3D display is considered as one of the ideal 3D displays. However, due to the large amount of data of 3D objects, the calculation speed of holograms is still relatively slow. In this paper, a fast hologram calculation method is proposed based on diffraction optimization. The information of 3D object is divided into the high-frequency part and the low-frequency part. The new look-up table (NLUT) algorithm is used to calculate the details of the high-frequency part, thus reducing the amount of diffraction calculation and ensuring the calculation accuracy of the details, while the lowfrequency information is diffracted by the faster angular spectrum algorithm. The sub-hologram of high-frequency information and the sub-hologram of low-frequency information are superimposed to obtain the final hologram. When the collimated light is used to illuminate the final hologram, the 3D reconstructed image of the object can be seen. Compared with the traditional NLUT algorithm, the calculation speed of the proposed method is increased by ~57.8%. Experiments verify the feasibility of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Fast calculation method of hologram based on diffraction optimization

Huang,

Wang,

Hou

et al. 2024

Advances in Display Technologies XIV

Self Cite

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“…In order to generate hologram of 3D scene, the end-to-end training network based on neural network preprocessing is further proposed 35,36 . In addition, some researchers propose a model-driven deep learning network, and the effect of high-fidelity holographic reconstruction can be realized [37][38][39] . Although some progress has achieved holographic reconstruction of real scenes, most of them only obtain 2D scene images, and then reconstruct 3D scene through relative depth estimation [40][41][42][43] .…”

Section: Introductionmentioning

confidence: 99%

Liquid lens based holographic camera for real 3D scene hologram acquisition using end-to-end physical model-driven network

Wang,

Li,

Zheng

et al. 2024

Light Sci Appl

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With the development of artificial intelligence, neural network provides unique opportunities for holography, such as high fidelity and dynamic calculation. How to obtain real 3D scene and generate high fidelity hologram in real time is an urgent problem. Here, we propose a liquid lens based holographic camera for real 3D scene hologram acquisition using an end-to-end physical model-driven network (EEPMD-Net). As the core component of the liquid camera, the first 10 mm large aperture electrowetting-based liquid lens is proposed by using specially fabricated solution. The design of the liquid camera ensures that the multi-layers of the real 3D scene can be obtained quickly and with great imaging performance. The EEPMD-Net takes the information of real 3D scene as the input, and uses two new structures of encoder and decoder networks to realize low-noise phase generation. By comparing the intensity information between the reconstructed image after depth fusion and the target scene, the composite loss function is constructed for phase optimization, and the high-fidelity training of hologram with true depth of the 3D scene is realized for the first time. The holographic camera achieves the high-fidelity and fast generation of the hologram of the real 3D scene, and the reconstructed experiment proves that the holographic image has the advantage of low noise. The proposed holographic camera is unique and can be used in 3D display, measurement, encryption and other fields.

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“…The work focuses on the luminance distribution on the screen, but the crosstalk distribution was not discussed. Different evaluation factors are established to describe the viewing zone [23], [24], [25], [26], [27] and the corresponding degrees of visual effect remain ambiguous. The qualified viewing space was pointed out by considering the crosstalk threshold.…”

Section: Introductionmentioning

confidence: 99%

Global Evaluation and Optimization for a Directionally Illuminated Autostereoscopy

Chen,

He,

Huang

et al. 2023

IEEE Photonics J.

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Evaluating the performance of an autostereoscopy is vital to the development of glasses-free three-dimensional display, hence a well-defined and complete characterization is highly necessary. For this purpose, a global and effective scenario is proposed and applied to a directionally illuminated autostereoscopy. The plenoptic function is adopted to characterize the uniformity perceived in various locations in the viewing zone. The crosstalk between binocular channels in different view positions over the entire screen is analyzed. The monocular effective viewing zone is defined by the uniformity and crosstalk while the binocular effective viewing zone is delineated by interpupillary distance. A complete visual modeling is developed that mimics the human vision process. Both simulation and experiment verify the feasibility of the evaluation method. Guided with the characterization, a freeform backlight system with a nonisometric staggered light emitting diode arrangement is optimally designed to generate a seamlessly continuous and uniform viewing zone at different viewing distances. For a nominal 850 mm viewing distance, high quality autostereoscopic display with a lateral viewing range of 560 mm and a longitudinal range of 559 mm is realized.

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High-Quality Holographic 3D Display System Based on Virtual Splicing of Spatial Light Modulator

Cited by 28 publications

References 45 publications

Fast calculation method of hologram based on diffraction optimization

Fast calculation method of hologram based on diffraction optimization

Liquid lens based holographic camera for real 3D scene hologram acquisition using end-to-end physical model-driven network

Global Evaluation and Optimization for a Directionally Illuminated Autostereoscopy

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