Abstract Ultrafast 3D imaging is indispensable for visualizing complex and dynamic biological processes. Conventional scanning-based techniques necessitate an inherent trade-off between acquisition speed space-bandwidth product (SBP). Emerging single-shot wide-field offer a promising alternative but are bottlenecked by the synchronous readout constraints of conventional CMOS systems, thus restricting data throughput to maintain high SBP at limited frame rates. To address this, we introduce...

We investigate the excitation and propagation of surface plasmon polaritons (SPPs) at a geometrically flat metal-dielectric interface with parity-time (PT) symmetric modulation on permittivity ϵ(x) dielectric medium. show that two striking effects can be simultaneously achieved thanks to nonreciprocal nature Bloch modes in system. First, SPPs unidirectionally excited when light is normally incident interface. Secondly, backscattering into far field suppressed, producing radiative-loss-free...

Traditional fluorescence microscopy is constrained by inherent trade-offs among resolution, field of view, and system complexity. To navigate these challenges, we introduce a simple low-cost computational multi-aperture miniature microscope, utilizing microlens array for single-shot wide-field, high-resolution imaging. Addressing the challenges posed extensive view multiplexing non-local, shift-variant aberrations in this device, present SV-FourierNet, multi-channel Fourier neural network....

The research of unmanned aerial vehicles' (UAVs') autonomy navigation and landing guidance with computer vision has important significance. However, because the image blurring, position cooperative points cannot be obtained accurately, pose estimation algorithms based on feature have low precision. In this research, algorithm UAV is proposed lines object for autonomous landing. This method uses actual shape cooperative-target ground principle vanishing line. Roll angle calculated from Yaw...

The powered parafoil system is obtained by adding the propeller thrust to unpowered system, and has coupling nonlinear characteristics, which make its precise control more difficult than that of system. To achieve trajectory tracking in field precision airdrop, a mathematical model 6-DOF established first. Then, new strategy proposed, can overcome limitations traditional guidance-based strategy. We design lateral, longitudinal, velocity controllers on basis motion characteristics we adopt...

We present a theoretical analysis on optical spin-sensitive Zitterbewegung (ZB) in metamaterials. By developing some formulas about the dispersions and eigenstates of modes we show that ZB can be obtained bianisotropic metamaterial with proper coupling between electric magnetic responses. A close analogue developed analytical results these Dirac equation is proposed. Numerical simulation proves existence refracted beam along direction determined by spin incidence. Furthermore, when incident...

Deep-brain microscopy is strongly limited by the size of imaging probe, both in terms achievable resolution and potential trauma due to surgery. Here, we show that a segment an ultra-thin multi-mode fiber (cannula) can replace bulky microscope objective inside brain. By creating self-consistent deep neural network trained reconstruct anthropocentric images from raw signal transported cannula, demonstrate single-cell (< 10μm), depth sectioning 40 μm, field view 200 all with...

Positron imaging technology has shown good practical value in industrial non-destructive testing, but the noise and artifacts generated during process of flow field images will directly affect accuracy fault diagnosis. Therefore, how to obtain high-quality reconstructed positron is a challenging problem. In existing image denoising methods, performance fields special still needs be strengthened. Considering characteristics few sample data strong regularity image,in this work, we propose new...

HiLo microscopy is an optical sectioning structured illumination technique based on computationally combining two images: one with uniform and the other illumination. The most widely used in random speckle patterns, due to their simplicity resilience tissue scattering. Here, we present a novel strategy caustic patterns. Building off-the-shelf diffuser low-coherence LED source, demonstrate that can achieve 4.5 µm capability 20× 0.75 NA objective. In addition, distinct intensity statistical...

Measurement of flame or combustion is an important method to estimate quality, study the performance engine and develop renewable energy sources. This paper presents a detect flow field in confined space using Positron Emission Tomography (PET) technology. Radionuclides are labelled aviation kerosene, nuclides distributed along with kerosene process combustion. γ photons generated by decay region detected detectors around object. Each pair 511keV travelling opposite directions within short...

We study the propagation of optical beams in two-dimensional Moiré lattices, and demonstrate position-dependent beam dynamics when a quasi-Bragg condition is satisfied. show that incident to peak lattice envelop, an Zitterbewegung obtained. If node field localization effect takes place. The localized oscillates with much larger spatial period than Zitterbewegung. Variation oscillation versus split periods discussed. are explained by excitation proper bandedge eigenmodes lattice, can be...

For the purpose of high-accuracy detection and tracking sun position, a measuring sensor based on Position Sensitive Detectors(PSD)has been designed. The PSD is installed at bottom canister which has narrow light pinhole so that could pass through it. Sunlight spot projects surface then information about position can be captured PSD. solar changed into electrical signal by processing circuit, further send to follow-up system. experimental results show accuracy this 0.05°at ±12°acceptable...

A Möbius strip has an intriguing topological property in that it only one non-orientable side. Here we propose to utilize coupled optical ring resonators (ORRs) simulate the effect of strips. This scheme is based on fact counter-clockwise mode ORR couples clockwise adjacent ORR. We show if odd number ORRs form a closed loop, after round trip handedness excited does not return initial one. Only double come back its state. Such kind Möbius-type coupling topology can be observed from strong...

Multi-sensor image matching based on salient edges has broad prospect in applications, but it is difficult to extract of real multi-sensor images with noises fast and accurately by using common algorithms. According the analysis features edges, a novel detection algorithm its rapid calculation are proposed possibility fuzzy C-means (PFCM) kernel clustering two-dimensional vectors composed values gray texture. PFCM can overcome shortcomings that (FCM) sensitive (PCM) tends find identical...

A solid-glass cannula serves as a micro-endoscope that can deliver excitation light deep inside tissue while also collecting emitted fluorescence. Then, we utilize neural networks to reconstruct images from the collected intensity distributions. By using commercially available dual-cannula probe, and training separate network for each cannula, effectively double field of view compared prior work. We demonstrated ex vivo imaging fluorescent beads brain slices in whole brains. clearly resolved...