A5029482763- Advanced optical system design
- Optical Coatings and Gratings
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Photoacoustic and Ultrasonic Imaging
- Adaptive optics and wavefront sensing
- Optical measurement and interference techniques
- Advanced Optical Imaging Technologies
- Optical Coherence Tomography Applications
- Optical Systems and Laser Technology
- Advanced Vision and Imaging
- Gyrotron and Vacuum Electronics Research
- Advanced Fluorescence Microscopy Techniques
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Advanced Measurement and Metrology Techniques
- Photonic and Optical Devices
- 3D Surveying and Cultural Heritage
- Advanced Antenna and Metasurface Technologies
- Thermal Radiation and Cooling Technologies
- Image Processing Techniques and Applications
- Advanced Measurement and Detection Methods
- Robotics and Sensor-Based Localization
- Optical Imaging and Spectroscopy Techniques
- Advanced Surface Polishing Techniques
Hangzhou Dianzi University
2007-2025
Ningxia Water Conservancy
2025
Beijing Institute of Technology
2013-2024
Shenzhen University
2024
Fudan University
2020-2024
China Southern Power Grid (China)
2024
Chongqing University
2023
State Key Laboratory of ASIC and System
2020
Shanghai Institute of Technical Physics
2019
Chinese Academy of Sciences
2019
Small thickness and light weight are two important requirements for a see-through near-eye display which achieved in this paper by using advanced technologies: geometrical waveguide freeform optics. A major problem associated with the is stray can severely degrade quality. The causes solutions to thoroughly studied. mathematical model of established non-sequential ray tracing algorithm developed, enable us carefully examine planar explore global searching method find an optimum design least...
It is difficult to design and fabricate a head-up display (HUD) with large asymmetric field of view (FOV) while maintaining good image quality. In this paper, we develop such holographic HUD system. To improve luminance enhance the environmental adaptability HUD, use liquid crystal high brightness as well reflection element. The vertical FOV tilted an angle −7°, which consistent actual pilot. decentration tilt optical relay system effectively compensate for distortion off-axis aberration due...
Thermal radiation with narrow bandwidth and well-defined emission directions is highly sought after for a variety of applications, ranging from infrared sensing thermal imaging to thermophotovoltaics. Here, large-area (4-inch-diameter) long-wavelength emitter presented, which spectrally selective, directional, easily fabricated. The basic structure the proposed composed truncated one-dimensional photonic crystal continuous metallic film separated by dielectric spacer. Experimental results...
Abstract This article proposes a new method for designing an optical transparent frequency-selective surface absorber using indium tin oxide (ITO) conductive film with different sheet resistances. novel exhibits excellent transparency, ensuring visible light transmittance exceeding 76%. Simultaneously, it broadband absorption characteristics covering the entire X-Ku band, rate 90%. Due to simplicity of design, overall structure is easily processable, and desired product can be rapidly...
Abstract Electric power operation is an important component to ensure the continuous supply of electricity. However, electric involves a wide range complex processes, high-risk factors, personal injury, and other major accidents that occur from time time. Although rules regulations safety production have been gradually improved, management mode has optimized day by day, low degree digitization intelligence still makes operations face high risk accidents. Against this background, paper...
SignificanceHepatocyte spheroids (HCSs) are three-dimensional (3D) in vitro models that exhibit a multilayered structure with site-dependent cell viability. The non-invasive identification of HCS and viability variation is essential fully exploiting the potential as model for liver disease research.AimWe aim to achieve long-term, monitoring quantification based on dynamic optical coherence tomography (D-OCT) enhance visualization internal activity D-OCT pseudo-color images.ApproachWe...
This paper presents a practical method to design all-reflective dual-channel foveated imaging systems. Such system statically has two optical channels, one with wider field-of-view for searching and another long focal length fine reconnaissance. The channels have common center field angle. These systems may be useful remote sensing where coarse observation are simultaneously needed. To demonstrate the method, corresponding designed. results reveal an angular resolution of finer than 4 arcsec...
Abstract TMR current sensor has excellent characteristics such as high sensitivity, good temperature characteristics, and wide dynamic range, which can meet the new needs of smart grid development. However, measured value output changes with change in spatial magnetic field strength. External electromagnetic interference will bring large errors DC bias to measurement sensor, resulting a narrowing range. Therefore, an compensation method for is proposed. Two chips are used measure synthetic...
The riparian zone is an area where land and water are intertwined, vegetation rich complexly distributed. can be directly involved in ecological regulation. In order to protect the environment of zone, it necessary monitor distribution vegetation. However, there many disturbing factors extracting vegetation, most serious which bodies with similar colours To overcome influence on extraction from UAV imagery areas, this paper proposes a novel approach that combines marked watershed algorithm...
We present an ultrawide angle catadioptric lens with a field of view (FOV) 360° × 270° and F/# 2.5. The consists two optical configurations: the center configuration is all-refractive has FOV ± 50° covers remaining FOV. MTF at 119lp/mm rear (90° to 135°) can be improved by 0.15 via applying annularly stitched aspherical surface (ASAS) element. developed presents smaller marginal distortions higher relative illuminations compared traditional panoramic lenses. A proof-of-concept prototype...
We consider the problem of hyperspectral image (HSI) reconstruction, which aims to recover 3D data from 2D compressive HSI measurements acquired by a coded aperture snapshot spectral imaging (CASSI) system. Existing deep learning methods have achieved acceptable results in reconstruction. However, these did not system degradation pattern. In this article, based on observing initialized HSIs obtained shifting and splitting measurements, we propose dynamic Fourier network learning, called...
In this paper, we propose an off-axis reflective system design method based on a non-rotational symmetric conicoid-based freeform (CBF) surface description. The base description avoids complicated calculation of decenter and tilt when using the conventional conic expression, thus simplify modeling optimization process, it can reduce number coefficients that needed to represent mild surfaces. A includes automatic initial searching, preliminary with rotationally deviation fine-tuning...
In current off-axis system design process, optical path configuration (OPC) of the often remains unchanged due to explicit physical constraints added in optimization and this prevents designers from obtaining potential better results with other OPCs. paper, we present a method change OPC automatically by ray-quadrangle-based optimization. our method, vector is utilized represent penalty function based on difference between its target value into error function. During variation, obscuration...
The acquisition of 3D models is a fundamental research in the field computer graphics and vision. However, it very complicated expensive to build manually by using modeling software, such as 3DMAX Maya. Therefore, how get directly quickly from real world hot topic this field. Multi-view based reconstruction techniques include feature point extraction matching, camera calibration, sparse cloud reconstruction, dense Poisson surface texture mapping many other techniques. This paper will focus...
The relentless pressure for designs with new optical functions, small volume, and light weight has greatly increased the importance of aspheric surfaces. In this paper, we propose an annularly stitched surface (ASAS) description method to increase freedom flexibility imaging system design. rotationally symmetric ASAS consists a circular central zone one or more annular zones. Two neighboring zones are constrained have same derivatives on their joint curve, means is C1 continuous. This...
Electromagnetic wave scattering suppression has applications in many scenes, including radio communication and electromagnetic compatibility. A large amount of research focuses on absorber structures with reflection at the −10 dB level, while beyond level is rather rare. In order to study formation higher suppression, metamaterial absorption composite function presented based coding sequence absorptive genetic components. The quantized experimental measurement result reaches −22.4...
The degree of automation in optical design has always been improving, and several human-competitive automatic lens programs have developed. However, to the best our knowledge, no such work on off-axis systems reported, which we think is largely due complicated unfeasible conditions caused by obscuration. Here, propose a model detect evaluate obscuration for mirror also method automatically eliminate structural optimization. This effect elimination demonstrated examples. It can greatly...
The panoramic lenses are getting more and popular in recent years. However, these have the drawback of obscuring rays coaxial fields, thus cause blind area center field vision. We present a novel system consisting two optical channels to overcome this issue, has view (FOV) reaching 200 vertical 360 horizontal direction without blindness area. different focal lengths, providing design flexibility meet application requirements where FOV or marginal is interest. no half-reflecting surfaces...
Freeform optics, mixed with other new technologies, continue to push the frontier of head-worn displays for virtual reality and augmented reality, deliver systems high optical performance, better user experience, low production cost.
To meet the requirements of current projection display system. This paper present an ultra-short throw catadioptric lens with a freeform mirror. structure consists two parts. The first part is set rotationally symmetrical refractive lenses and second In our design, Texas Instruments's Digital Light Processing (DLP) chosen as image source. A 0.65inch DMD employed spatial light modulator. parts system are firstly designed respectively, then they combined for final design. And three-dimensional...