Optics and Lasers in Engineering, Journal Year: 2024, Volume and Issue: 184, P. 108599 - 108599
Published: Sept. 23, 2024
Language: Английский
Science Advances, Journal Year: 2025, Volume and Issue: 11(5)
Published: Jan. 29, 2025
Holography is capable of rendering three-dimensional scenes with full-depth control and delivering transformative experiences across numerous domains, including virtual augmented reality, education, communication. However, traditional holography presents 3D unnatural defocus severe speckles due to the limited space bandwidth product spatial light modulator (SLM). Here, we introduce Motion Hologram, a holographic technique that accurately portrays photorealistic speckle-free scenes. This leverages single hologram learnable motion trajectory, which are jointly optimized within deep reinforcement learning framework. Specifically, experimentally demonstrated proposed could achieve 4- 5-dB PSNR improvement focal stacks in comparison successfully depict speckle-free, high-fidelity, full-color displays using only commercial SLM. We believe method promises prospective form will offer immersive viewing for audiences.
Language: Английский
Citations
0
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 26, 2025
Abstract Augmented reality (AR) displays have provided users with immersive and see‐through experiences by overlaying virtual information onto the real physical environment. To realize combination of information, holographic plastics hold great promise as a waveguide combiner due to their high diffraction efficiency, transmittance, ease processing. However, adoption in practical AR is significantly limited reliability. Herein, subtle design longline‐like polymers multiple “hooking” sites reported that can undergo crosslinking after manufacturing. The resulting plastic reflection grating structures not only exhibits efficiency (> 80%), transmittance ( T 400 > 80%) low haze (<3%), but also shows improved stability under various environmental conditions (e.g., 60 °C oven, 80 water, & 90% relative humidity chamber), finally enabling high‐fidelity display three‐primary colors. proven critical, control group without inferior despite holding very similar parameters before This work establishes viable paradigm for developing reliable combiners explores new optical application chemical design.
Language: Английский
Citations
0
Optics Express, Journal Year: 2023, Volume and Issue: 32(2), P. 2846 - 2846
Published: Dec. 28, 2023
High-fidelity optical information transmission through strongly scattering media is challenging, but crucial for the applications such as free-space communication in a haze or fog. Binarizing can somehow suppress disruptions caused by light scattering. However, this method gives compromised throughput. Here, we propose high-fidelity multiplexing anti-scattering (MAST). MAST encodes multiple bits into complex-valued pattern, loads pattern to an field modulation, and finally employs matrix-assisted retrieval technique reconstruct original from speckle patterns. In our demonstration, multiplexed three channels achieved of 3072 (= 1024× 3) data per average error small 0.06%.
Language: Английский
Citations
4
Photonics Research, Journal Year: 2024, Volume and Issue: 12(5), P. 876 - 876
Published: Feb. 26, 2024
Accurately measuring the complex transmission matrix (CTM) of scattering medium (SM) holds critical significance for applications in anti-scattering optical imaging, phototherapy, and neural networks. Non-interferometric approaches, utilizing phase retrieval algorithms, can robustly extract CTM from speckle patterns formed by multiple probing fields traversing SM. However, cases where an amplitude-type spatial light modulator is employed field modulation, absence control frequently results convergence towards a local optimum, undermining measurement accuracy. Here, we propose high-accuracy (CTMR) approach based on regional differentiation (RPD). It incorporates sequence additional masks into fields, imposing priori constraints algorithms. By distinguishing variance produced different masks, RPD-CTMR effectively direct algorithm solution that closely approximates We built prototype digital micromirror device modulated RPD-CTMR. accurately diffusers, achieved enhancement peak-to-background ratio focusing factor 3.6, alongside reduction bit error rate image 24. Our proposed aims to facilitate precise modulation scattered thereby fostering advancements diverse including high-resolution microscopy, biomedical communications.
Language: Английский
Citations
1
Acta Optica Sinica, Journal Year: 2024, Volume and Issue: 44(10), P. 1026006 - 1026006
Published: Jan. 1, 2024
波前整形方法通过改变入射光的相位模式分布来补偿由散射引起的相位畸变,使散射光子可以被有效地利用,从而实现散射光场调控。通过散射光场调控可以将有害的散射介质变成可控的光学元件,实现光的定向传输、动态检测等功能,为其在各领域中的应用提供了一种强大的工具。本文在介绍光场散射特性及其调控方法原理的基础上,介绍了散射光场空间、偏振、频率、能量和轨道角动量等自由度的调控方法,随后重点介绍了散射光场调控在成像、通信、非线性光学、量子光学、光学检测、集成光学和光计算等领域的最新研究进展。
Citations
1
Optics Express, Journal Year: 2024, Volume and Issue: 32(14), P. 25488 - 25488
Published: June 20, 2024
Empowered by wavefront shaping (WFS) techniques, scattering materials (SMs) hold significant potential in high-capacity, high-fidelity, and crosstalk-free 3D holographic projections. Here, we present an optimal accumulation algorithm (OAA) to generate binary amplitude holograms that enable simultaneous control of intensity polarization distributions through SMs. In particular, OAA is efficient for creating since only addition comparison operations are required. Using such a hologram, demonstrate complete on four planes simultaneously, average degree over 95% achieved. Moreover, projection polarization-multiplexed images multiple also presented with Pearson correlation coefficient 0.80. By exploiting the rapid switching ability digital micromirror device, further dynamic vectorial projections reconfigurable holograms. Our proposed approach offers competitive way scattering-enabled
Language: Английский
Citations
1
Journal of Optics, Journal Year: 2024, Volume and Issue: 26(8), P. 085104 - 085104
Published: July 9, 2024
Abstract Integration and miniaturization of multi-channel single-pixel imaging systems have become a developing trend. However, it is challenging to meet such development needs solely relying on traditional optical devices. One feasible solution the utilization metasurfaces with multiplexing functionality. Here, we propose validate an all-dielectric, anisotropic metasurface that provides random mask polarization for single pixel imaging. The design ensures each contains 50% target information, allowing adaptive correlated different targets without needing redesign masks. By optimizing metasurface, enhance computational efficiency by preventing correlation between channels patterns. We also adjust parameters compressed sensing algorithm accommodate various sampling rates, ensuring high-quality image reconstruction. Additionally, whole system simulated angular spectrum transmission reconstruction algorithm, providing results sizes, demonstrating feasibility proposed approach. It noteworthy designed works single-wavelength operation could be extended multispectral introducing achromatic technology. method miniaturize devices reduce light loss.
Language: Английский
Citations
0
Published: Jan. 1, 2024
Language: Английский
Citations
0
Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(12)
Published: Sept. 16, 2024
Polarization detection plays a significant role in optics. However, the current methods usually involve mechanically rotating components, multiple measurement steps, complicated optical design, and precise microfabrication process. To address this issue, we propose single-shot method to detect polarization state of light based on highly scattering system, which is constituted by spatial modulator medium. When incident beam shaped superimposed wavefront medium, foci represented six components at horizontal, vertical, diagonal, antidiagonal, right circularly polarized, left polarized directions will appear behind medium simultaneously. By measuring intensities these foci, all Stokes parameters can be extracted. Taking advantage measured parameters, orientation angle major axis, ellipticity, handedness ellipse determined. Various beams with different states are detected demonstrate viability method. The experimental results theoretical values good agreement. Compared existing methods, approach fast, free fabrication, independent mechanical movement. proposed expected promote development real-time broadband polarimetry.
Language: Английский
Citations
0
Optics and Lasers in Engineering, Journal Year: 2024, Volume and Issue: 184, P. 108599 - 108599
Published: Sept. 23, 2024
Language: Английский
Citations
0