A5083621651- Advanced Optical Imaging Technologies
- Digital Holography and Microscopy
- Metamaterials and Metasurfaces Applications
- Photorefractive and Nonlinear Optics
- Advanced Antenna and Metasurface Technologies
- Optical measurement and interference techniques
- Advanced X-ray Imaging Techniques
- Liquid Crystal Research Advancements
- Photoacoustic and Ultrasonic Imaging
- Photonic and Optical Devices
- Sparse and Compressive Sensing Techniques
- Microwave Engineering and Waveguides
- Optical Coatings and Gratings
- Virtual Reality Applications and Impacts
- Advanced Electron Microscopy Techniques and Applications
- Optical Wireless Communication Technologies
- Interactive and Immersive Displays
- Radio Frequency Integrated Circuit Design
- Electrowetting and Microfluidic Technologies
- Antenna Design and Analysis
- Optical Polarization and Ellipsometry
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Neural Networks and Reservoir Computing
- Image and Video Stabilization
China Academy of Engineering Physics
2016-2024
Anhui University
2015-2024
Chinese Academy of Sciences
2011
Zhejiang University
2005
Abstract In this paper, we propose a holographic capture and projection system of real objects based on tunable zoom lenses. Different from the traditional system, liquid lens-based camera digital conical lens are used as key parts to reach functions projection, respectively. The is produced by combing lenses solid lenses, which has advantages fast response light weight. By electrically controlling curvature liquid-liquid surface, focal length can be changed easily. As another lens, large...
In a classical metasurface-based holographic display system, clear reconstruction image can be obtained only in the back-focal-plane of lens. However, when receiving plane deviates from focal plane, reconstructed suffers degradations that limit quality images. Hence, we propose novel to realize clearly continuous imaging within specified position range by superimposing meta-axilens phase. It effectively relieve alignment requirements system. Firstly, parameters and properties all-dielectric...
In this work, we propose an active optical zoom system. The module of the system is formed by a liquid lens and spatial light modulator (SLM). By controlling focal lengths encoded digital on SLM panel, can change magnification image without mechanical moving parts keep output plane stationary. from 1/3 to 3/2 as length changes infinity 24 cm. proposed simple flexible, has widespread application in communications, imaging systems, displays.
The random phase method and quadratic are most widely used in the generation of non-iterative holograms. However, former leads to reconstruction being severely disturbed by speckle noise, with serious loss detailed information, latter contaminated ringing artifacts. To solve these problems, we present a novel, best our knowledge, capable generating holograms, hereafter referred as hybrid-phase-only holograms (HPOHs). Our proposal is use weight factor combine generate hybrid mask. mask then...
Multi-channel metasurface holography based on polarization multiplexing has received close attention for its application in increasing information capacity. However, most of the existing spin-selective metasurfaces focus utilization cross-polarized channels while neglecting co-polarized channels. Moreover, real-time dynamic switching incident remains a great challenge. This work presents dielectric that combines geometric and propagation phase modulations. It allows control pair orthogonal...
In this Letter, we propose a color holographic zoom system based on liquid lens. We use the spatial multiplexing method to realize reconstruction. By controlling focal lengths of lens and encoded digital light modulator panel, can change magnification reconstructed image very quickly, without mechanical parts keeping output plane stationary.
Metalenses have drawn a lot of interest for use in near-infrared (NIR) bioimaging due to their benefits, such as flexible design, light weight, and simple integration. However, chromatic aberration is inevitable optical systems, which substantially reduces imaging quality. A broadband achromatic metalens linearly polarized the range 1200 1550 nm constructed address this challenge. The phase dispersion incident are modulated by altering ratio between long short axes elliptical nanopillars....
Abstract The main challenge in designing broadband achromatic metalenses is to achieve the desired phase distribution at different wavelengths and positions. Finding exact relationship between modulation size or shape of individual nanopillars a critical but time-consuming step. This paper presents novel joint design framework predictive neural networks particle swarm optimization-genetic algorithms, which combines network (PNN) algorithm (PSO-GA). proposed aims accurately predict response...
As artificially designed two-dimensional (2D) arrays of subwavelength nanostructures, metasurfaces provide a new avenuefor the design static planar optics. However, one would prefer dynamic modulation metasurface in event practical applications. potentially important technique for information security, meta-holographic encryption has characteristics pixels, precise control, and high safety factor. In this paper, by integrating birefringent liquid crystals (LCs) with all-dielectric...
In this paper, we propose an adjustable aperture based on the phase modulation of a spatial light modulator (SLM). Two polarized beam splitters (PBSs) are used to control and one SLM is modulate light. A specific grayscale produced, where middle with 0 other π. When passes through first PBS SLM, state p-light changed s-light by π, so only can pass second detected camera. By controlling size 0, device realize function aperture. Our experiment shows that be tuned between full size, meaning it...
To provide better reconstruction quality, it takes more time for iterative algorithms, especially when multiple holograms need to be computed. A non-iterative method calculating a phase hologram with adaptive weighted constraints is proposed, which iteratively calculates the optimized rectangular aperture as amplitude and multiplies initial quadratic complex amplitude. Subtraction feedback introduced improve visual effect avoid overcompensation problem of division feedback. The proposed...
A multiple-image encryption method based on a computer-generated phase-only hologram (POH) algorithm and chaotic systems is proposed. In the proposed method, first, modified Gerchberg–Saxton (GS) applied to transform into corresponding sub-sampled POHs. Then, multiple POHs are combined using spatial division multiplexing (SDM). The then mapped digital image, each pixel of image transformed by system improve security form final ciphertext. GS employed generate POH, which prerequisite for SDM....
In this paper, the effects of thermal annealing (TA) were studied by theoretical calculation and experiment. The was based on Masafumi's model dislocation movement, modified with stress lattice-mismatch in HgCdTe/CdTe/Si(211) heterostructure. As indicated, temperature holding time TA had great effect reduction, while less improvement epilayer thickness growth orientation. Upon result calculation, cycle (TCA) experiments performed under different conditions, which fit properly. reduction...
Compressed sensing (CS) provides an innovative framework for signal sampling, which enables accurate recovery of the sparse or compressible from a small set linear measurements far fewer than Nyquist rate in traditional processing. In compressed sensing, random modulation plays key role, can spread out information more less evenly across all locations. There are many techniques, such as amplitude modulation, frequency phase spectrum and so on. Among these is vital due to efficiency...
Abstract Existing optimized random phase (ORAP) approach mainly faces the limitations of fixed supports. Different ORAPs need to be generated for different target images with support sizes, thus lacking flexibility and severely limiting applicability. This paper proposes a support-free Fourier (SF-OFRAP) non-iterative kinoform generation, which greatly improves speed generating kinoforms, can achieve comparable performance ORAP approach. The proposed SF-OFRAP not only breaks constraint...
Optical vortices (OV) with an open shape have a unique function in directional particle transport and collection. A power-exponent-phase vortex (PEPV) has received particular attention as type of unconventional beam large opening carrying orbital angular momentum (OAM). So far, only the generation methods properties individual PEPV been studied analyzed. In this paper, we use dielectric metasurfaces instead conventional bulky optical device to generate arrays uniform diffracted intensity...