Large-size holographic display method based on effective utilization of two spatial light modulators

2019 ◽  
Vol 453 ◽  
pp. 124311
Author(s):  
Nan-Nan Li ◽  
Di Wang ◽  
Chao Liu ◽  
Shu-Feng Lin ◽  
Qiong-Hua Wang
Keyword(s):  
Spatial Light Modulators ◽  
Effective Utilization ◽  
Holographic Display ◽  
Light Modulators ◽  
Large Size

scholarly journals Holographic Display System to Suppress Speckle Noise Based on Beam Shaping

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 204
Author(s):  
Di Wang ◽  
Yi-Wei Zheng ◽  
Nan-Nan Li ◽  
Qiong-Hua Wang
Keyword(s):  
Optical Element ◽  
Speckle Noise ◽  
Beam Shaping ◽  
Diffractive Optical Element ◽  
The Other ◽  
Spatial Light Modulators ◽  
Viewing Angle ◽  
Display System ◽  
Holographic Display ◽  
Light Modulators

In this paper, a holographic system to suppress the speckle noise is proposed. Two spatial light modulators (SLMs) are used in the system, one of which is used for beam shaping, and the other is used for reproducing the image. By calculating the effective viewing angle of the reconstructed image, the effective hologram and the effective region of the SLM are calculated accordingly. Then, the size of the diffractive optical element (DOE) is calculated accordingly. The dynamic DOEs and effective hologram are loaded on the effective regions of the two SLMs, respectively, while the wasted areas of the two SLMs are performed with zero-padded operations. When the laser passes through the first SLM, the light can be modulated by the effective DOEs. When the modulated beam illuminates the second SLM which is loaded with the effective hologram, the image is reconstructed with better quality and lower speckle noise. Moreover, the calculation time of the hologram is reduced. Experiments indicate the validity of the proposed system.

scholarly journals Phase-only transmissive spatial light modulator based on tunable dielectric metasurface

Science ◽  
2019 ◽  
Vol 364 (6445) ◽  
pp. 1087-1090 ◽  
Author(s):  
Shi-Qiang Li ◽  
Xuewu Xu ◽  
Rasna Maruthiyodan Veetil ◽  
Vytautas Valuckas ◽  
Ramón Paniagua-Domínguez ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Light Modulator ◽  
Deflection Angle ◽  
Beam Steering ◽  
Beam Deflection ◽  
Spatial Light Modulators ◽  
Light Modulator ◽  
Steering Angle ◽  
Holographic Display ◽  
Light Modulators

Rapidly developing augmented reality, solid-state light detection and ranging (LIDAR), and holographic display technologies require spatial light modulators (SLMs) with high resolution and viewing angle to satisfy increasing customer demands. Performance of currently available SLMs is limited by their large pixel sizes on the order of several micrometers. Here, we propose a concept of tunable dielectric metasurfaces modulated by liquid crystal, which can provide abrupt phase change, thus enabling pixel-size miniaturization. We present a metasurface-based transmissive SLM, configured to generate active beam steering with >35% efficiency and a large beam deflection angle of 11°. The high resolution and steering angle obtained provide opportunities to develop the next generation of LIDAR and display technologies.

scholarly journals Large size three-dimensional video by electronic holography using multiple spatial light modulators

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Hisayuki Sasaki ◽  
Kenji Yamamoto ◽  
Koki Wakunami ◽  
Yasuyuki Ichihashi ◽  
Ryutaro Oi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Spatial Light Modulators ◽  
Light Modulators ◽  
Large Size ◽  
Electronic Holography

scholarly journals Progress in Phase Calibration for Liquid Crystal Spatial Light Modulators

2019 ◽  
Vol 9 (10) ◽  
pp. 2012 ◽  
Author(s):  
Rujia Li ◽  
Liangcai Cao
Keyword(s):  
Optical Tweezers ◽  
Phase Modulation ◽  
Spatial Light Modulators ◽  
Light Modulator ◽  
Holographic Display ◽  
Light Modulators ◽  
Interferometric Phase ◽  
Calibration Methods ◽  
Phase Calibration ◽  
Potential Methods

Phase-only Spatial Light Modulator (SLM) is one of the most widely used devices for phase modulation. It has been successfully applied in the field with requirements of precision phase modulation such as holographic display, optical tweezers, lithography, etc. However, due to the limitations in the manufacturing process, the grayscale-phase response could be different for every single SLM device, even varying on sections of an SLM panel. A diverse array of calibration methods have been proposed and could be sorted into two categories: the interferometric phase calibration methods and the diffractive phase calibration methods. The principles of phase-only SLM are introduced. The main phase calibration methods are discussed and reviewed. The advantages of these methods are analyzed and compared. The potential methods for different applications are suggested.

Real-Time Phase-Only Spatial Light Modulators for 2D Holographic Display

2015 ◽  
Vol 11 (3) ◽  
pp. 278-284 ◽  
Author(s):  
N. Collings ◽  
J. L. Christmas ◽  
D. Masiyano ◽  
W. A. Crossland
Keyword(s):  
Real Time ◽  
Spatial Light Modulators ◽  
Holographic Display ◽  
Light Modulators

scholarly journals Holographic Near-Eye 3D Display Method Based on Large-Size Hologram

2021 ◽  
Vol 8 ◽  
Author(s):  
Su-Juan Liu ◽  
Ning-Tao Ma ◽  
Ping-Ping Li ◽  
Di Wang
Keyword(s):  
Incident Angle ◽  
Linear Structure ◽  
Reconstructed Image ◽  
Spatial Light Modulators ◽  
Image Point ◽  
Viewing Angle ◽  
3D Display ◽  
Light Modulators ◽  
Large Size ◽  
Tiling System

In this paper, we propose a holographic near-eye 3D display method based on large-size computer-generated hologram (CGH). The reconstructed image with a large viewing angle is obtained by using a time multiplexing and spatial tiling system. The large-size CGHs are generated and they record the information of the 3D object from different angles. The CGHs are reproduced at different moments. For a certain reconstructed moment, three spatial light modulators (SLMs) spatially spliced into a linear structure are used to load a single CGH. The diffraction boundary angle of the reconstructed light forming each image point is equal to the maximum diffraction angle of the SLM, so the viewing angle of the image generated by the CGH is enlarged. For different CGHs, the incident angle of reconstructed light is changed. Through time multiplexing, the reconstructed images of the CGHs are combined into a reconstructed image whose viewing angle is further enlarged. Due to the large viewing angle of the reconstructed image, the proposed method has unique advantages in near-eye display. The feasibility of the proposed method is proved by experimental results.

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