A5077889954- Adaptive optics and wavefront sensing
- Optical Systems and Laser Technology
- Advanced optical system design
- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Advanced Optical Sensing Technologies
- Calibration and Measurement Techniques
- Infrared Target Detection Methodologies
- Astronomy and Astrophysical Research
- Optical Coherence Tomography Applications
- Image Processing Techniques and Applications
- Random lasers and scattering media
- Stellar, planetary, and galactic studies
- Advanced Photocatalysis Techniques
- Solid State Laser Technologies
- Ocular and Laser Science Research
- Advanced Surface Polishing Techniques
- Gas Sensing Nanomaterials and Sensors
- Advanced Measurement and Detection Methods
- Catalytic Processes in Materials Science
- Astronomical Observations and Instrumentation
- Multiferroics and related materials
Chinese Academy of Sciences
2016-2025
Changchun Institute of Optics, Fine Mechanics and Physics
2016-2025
Jilin University
2023-2025
Institute of Physics
2018-2022
University of Chinese Academy of Sciences
2018-2022
National Laboratory for Superconductivity
2021
Peking University
2020
Songshan Lake Materials Laboratory
2020
Lanzhou University
2018-2020
Anhui University
2020
Single-pixel imaging is a computational optical technique that uses single-pixel detector to obtain scene information and reconstruct the image. Compared with traditional techniques, has advantages of high sensitivity wide dynamic range, etc., which make it have broad application prospects in special frequency band scattering media imaging. This paper mainly introduces history development characteristics detector, focuses on typical applications coded aperture, transverse scanning,...
Charge transfer and electron-phonon coupling (EPC) are proposed to be two important constituents associated with enhanced superconductivity in the single unit cell FeSe films on oxide surfaces. Using high-resolution electron energy loss spectroscopy combined first-principles calculations, we have explored lattice dynamics of ultrathin grown SrTiO3. We show that, despite significant effect from substrate electronic structure system, phonons unaffected. The dispersion linewidth Fe- Se-derived...
Real-time dim space target detection is a significant challenge in situation awareness. This paper proposes single-frame object segmentation and method based on deep learning. Firstly, Channel Space Attention U-net (CSAU-Net) presented image features. We remove unnecessary feature layers add attention modules the traditional encoder decoder structure to enhance fusion better use original layers. The proposed network can achieve accurate of objects with fewer data training. At same time, we...
Abstract The d -band-filling of transition metals in complex oxides plays an essential role determining their structural, electronic and magnetic properties. Traditionally, at the oxide heterointerface, band-filling control has been achieved via electrostatic modification structure field-effect transistors or electron transfer, which is limited to quasi-two-dimension interface. Here we report a three-dimensional (3D) by changing local lattice coordination designed heterostructure. At LaCoO 3...
Two-dimensional (2D) in-plane p-n junctions with a continuous interface have great potential in next-generation devices. To date, the general fabrication strategies rely on lateral epitaxial growth of p- and n-type 2D semiconductors. An junction is fabricated homogeneous monolayer Te at step edge graphene/6H-SiC(0001). Scanning tunneling spectroscopy reveals that terrace trilayer graphene p-type, it graphene. Atomic-resolution images demonstrate lattice junction, mappings electronic states...
The development of astronomy relies heavily on advances in high-resolution imaging techniques. With the growing demand for astronomical observations, conventional optical interferometry has gradually revealed various limitations, especially coping with atmospheric phase fluctuations and long baseline observations. However, intensity is becoming an important method to overcome these challenges due its high robustness excellent performance long-baseline In this paper, basic principles key...
Oxygen vacancies (Vo) play significant roles in determining the properties of transition-metal oxides. However, concentration Vo cannot be tuned quantitatively by optimizing preparation conditions, and precise control distribution at atomic scale is even more challenging. Here, controlling reversible phase transitions between perovskite LaCoO3 (PV-LCO) brownmillerite LaCoO2.5, we realize tuning PV-LCO, including with quantitative precision spatial scale. With first principles calculations,...
To improve their spatial resolution and detection capabilities, future ground-based optical telescopes will have a size of 30 m, the aperture space be increased to 10 m. Such large systems necessitate development integrated testing equipment. In this study, spectrum system alignment measurements wavefront quality checking were performed using sub-aperture method fiber-connected Photonics Scanning Pentaprism (PSP). First, was aligned an truss, ensuring that axis properly positioned. Second,...
Fine alignment of large, segmented telescopes is critical for achieving high angular resolution. Building an instrument with equally large monolithic aperture difficult because the increasing mass and volume. Sparse testing a lower-cost solution to metrology, both in optics shop at observatory. We combined sparse curvature sensing process highly system's final alignment. First, stitching error, including tip/tilt/piston shifting errors, analyzed theoretically numerically. These errors are...
Segmented primary mirror provides many crucial important advantages for the construction of extra-large space telescopes. The imaging quality this class telescope is susceptible to phasing error between segments. Deep learning has been widely applied in field optical and wavefront sensing, including segmented mirrors. Compared other image-based techniques, such as phase retrieval diversity, deep advantage high efficiency free stagnation problem. However, at present methods are mainly coarse...
Compared to their parent materials, oxygen vacancy ( V O )–ordered phases of complex oxides exhibit distinct physical properties and show great potential in multifunctional devices. With the expected unique behaviors, however, most ‐ordered oxide films are extremely difficult synthesize due thermodynamic instabilities. Herein, using LaCoO x as an example, synthesis large‐scale monophased 2.67 2.5 is realized by annealing as‐grown perovskite 3 vacuum with a special heating method. Their...
Wavefront reconstruction and correction under strong turbulence has become a crucial issue for adaptive optics systems. An approach using plenoptic sensor attracted high attention recently. However, the existing algorithms based on are sometimes unsatisfactory. Therefore, we propose modified checkerboard algorithm to reconstruct wavefront. By means of weighted summation, accuracy is clearly increased. We direct-gradient method correct disturbed wavefront after reconstruction, our...
In the co-phasing techniques applied to segmented telescope, a Shack-Hartmann wavefront sensor cannot accurately detect piston error of segment. Although phase diversity (PD) algorithm can each segment, it fails reconstruct quickly, and its dynamic range is small. Other technologies, such as prisms or micro-lens arrays, will significantly increase complexity construction cost optical system. Moreover, they may also introduce non-common path errors. this study, we propose an approach address...
The Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) team is developing the Giant Steerable Science Mirror (GSSM) for Thirty Meter Telescope (TMT) which will get into preliminary design phase in 2016. To develop passive support structure system largest elliptic-plan flat mirror smoothest tracking mechanism gravity-invariant condition, CIOMP designing building a 1/4 scale, functionally accurate version GSSM prototype. prototype incorporate same optical-mechanical electric...
We propose a sub-aperture stitching algorithm based on frequency domain that can be denoted as power spectral density (PSD). Our is verified by the experimental data obtained from measuring Φ1.23 m mirror at Changchun Institute of Optics, Fine Mechanics and Physics. Then, we apply it to Great Steering Science Mirror (GSSM) Thirty Meter Telescope (TMT) with simulated before preliminary design phase, obtain more objective result aberrations. Therefore, stitching-based PSD expected useful for...
With the aperture of large ground-based telescopes increasing, thermal issues appear more evidently. As a relatively expansion coefficient SiC (about 2.5x10<sup>-6</sup> /K), it makes lightweight primary mirror sensitive to temperature gradient. Firstly, discuss issue seeing induced by difference between surface and ambient theoretically. Then analyze deformation under seven different steady-state fields with unit load. A uniform axial gradient can cause deflection RMS which reach 438.4 nm....
Ground-based telescopes are often affected by vignetting, stray light and detector nonuniformity when acquiring space images. This paper presents a image nonuniform correction method using the conditional generative adversarial network (CGAN). Firstly, we create dataset for training introducing physical vignetting model designing simulation polynomial to realize background. Secondly, develop robust (CGAN) learning background, in which improve structure of generator. The experimental results...
In optical systems, pupil alignment is an important component of wavefront sensing, closed-loop feedback, and imaging vignetting control because it directly affects the detection limit system thus realization scientific goals. This study proposes use energy transfer characteristics edge to determine misalignment each pupil. The mechanism involves decoupling influence from final exit distribution by using aperture coding without addition other paths. degree which aligned characterized...
This paper proposes a single-photon-counting lidar based on time coding that can obtain the target’s spatial location and measure distance azimuth angle in real without needing scanning device. Multiple optical fibers were used to introduce laser echo photons into single-pixel single-photon detector. According deviation detection of passing through different fibers, multiple distances be obtained simultaneously. Combining measured with fiber spacing allows calculation distance, angle,...
Large survey telescopes are vital for mapping dark energy and matter in the deep universe. This study presents a fiber-linked internal motion metrology system that aligns mirrors large lenses to enhance alignment accuracy by improving image quality at lower weight, volume, power, cost. The comprises photonic laser beam projector capable of projecting multiple Gaussian beams onto detector telescope. specific spatial frequency aberration component is determined combining location geometry...
The calibration of the tertiary mirror Thirty Meter Telescope, also known as giant science steering (GSSM), is a step great significance during its testing process. Systematic, drift, and random errors constitute major limitations to accuracy measurements. In this article, we estimated in GSSM with laser tracker. For systematic error, measurement strategy based on standard bar method was successfully designed applied. At same time, can distinguish between drift by means correlation analysis....
The Giant Steerable Science Mirror (GSSM) is the tertiary mirror system of Thirty Meter Telescope (TMT) that relays optical beams from secondary to active instruments on Nasmyth platforms. One key technologies involved in GSSM functions error budget allocation engineering TMT. A novel approach analysis and with strong adaptability, which based normalized Point Source Sensitivity (PSSn), proposed. relay function including quality wavefront, rationality mechanism, stability light were achieved...