A5088943883- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Optical Systems and Laser Technology
- Advanced Surface Polishing Techniques
- Surface Roughness and Optical Measurements
- Adaptive optics and wavefront sensing
- Advanced optical system design
- Image Processing Techniques and Applications
- Advanced machining processes and optimization
- Industrial Vision Systems and Defect Detection
- Advanced Measurement and Detection Methods
- Laser Material Processing Techniques
- Gastric Cancer Management and Outcomes
- Advanced Optical Imaging Technologies
- Optical Coatings and Gratings
- Gastrointestinal Bleeding Diagnosis and Treatment
- Helicobacter pylori-related gastroenterology studies
- Tribology and Lubrication Engineering
- Cavitation Phenomena in Pumps
- Antenna Design and Analysis
- Advancements in Photolithography Techniques
- Image and Object Detection Techniques
- Advanced Optical Sensing Technologies
- Hydraulic and Pneumatic Systems
- Advanced Numerical Analysis Techniques
Sixth Affiliated Hospital of Kunming Medical University
2023-2025
Kunming Medical University
2023-2025
Institute of Optics and Electronics, Chinese Academy of Sciences
2013-2024
Chinese Academy of Sciences
2011-2024
University of Chinese Academy of Sciences
2010-2024
State Key Laboratory on Integrated Optoelectronics
2024
Beijing Institute of Technology
2023
China West Normal University
2023
China Textile Academy
2022
Second Military Medical University
2016-2018
Diseases of the stomach, including gastric cancer and peptic ulcer, are most common digestive diseases. It is impossible to visualize entire stomach with passive capsule currently used in practice because large size cavity. A magnetically controlled endoscopy (MCE) system has been designed explore stomach. We performed a prospective study compare accuracy detection focal lesions by MCE vs conventional gastroscopy (the standard method).We multicenter blinded comparing 350 patients (mean age,...
This paper presents a novel method to extract the phase shift and distribution from two interferograms simultaneously. By employing Hilbert–Huang transform based prefiltering, background intensities modulation amplitudes of are suppressed normalized respectively. With addition subtraction operation prefiltered interferograms, parametric equations achieved which can be regarded as complex harmonic motion Lissajous figure. The figure directly demodulated by ellipse fitting algorithm. Apart...
A novel chromatic confocal measurement (CCM) method using a hybrid diffractive- refractive lens is presented. This designed to optimize the linearity of dispersion and minimize size optical system. The fabricated by etching diffractive surface onto quartz aspheric through lithography, which combines high numerical aperture (NA) with unique properties elements (DOE). incorporated as dispersive objective in CCM experimental system has range 514.8 µm, calibrated laser displacement...
Based on our previously reported annular subaperture reconstruction algorithm with Zernike polynomials and matrix method, we provide an experimental demonstration by testing a parabolic mirror the complementary interferometric method. By comparing results of method that classical auto-collimation it is shown are in good agreement measurement. In addition, discuss some limitations characterizing measurement data finite coefficients algorithm, also show possibility higher spatial frequency...
A novel panoramic stereo imaging system with double annular lenses (PAL) is introduced in this paper. The proposed consists of two coaxial PAL units and images on one sensor. rings are concentric. object position can be calculated by triangulation. novelty that the central blind zone unit partly used other as an image zone. field view 60°~105° × 360°. depth extracting resolution about 500 mm at 1line/cm. F# 3, facilitating to applied low illumination environment. design presented precision analyzed.
Path deviations caused by geometrical errors in machining equipment significantly affect the quality of optical components. To enhance and efficiency component processing, this paper presents a Chebyshev interpolated Levenberg-Marquardt algorithm (CILM) aimed at compensating for path robotic smoothing system utilized processing. First, positioning accuracy is measured using laser tracker. Subsequently, an objective function constructed based on robot kinematics error models to optimize...
A new stray light analysis method and some suppression principles of panoramic annular lens (PAL) are introduced in this paper. The proposed is to find paths which caused by ray splitting on two refractive surfaces the PAL block then cut them off. Following principle, can be eliminated design progress adding specific merit functions into optical software. methods reduce scatter, diffraction other also proposed. with a field view (FOV) 30° ~ 100° × 360° designed. suppressed more than 80%...
Generalized basic iterative methods for absolute measurement of optical flats are presented. They based on scheme and can be classified into block Jacobi Successive Over-relaxation (SOR) method SOR method. Both effective solving the three-flat problem with pixel-level spatial resolution, without usage a fitting procedure. Compared to method, an inexpensive choosing relaxation factor (such as ω = 1.5) converges much faster saves more computational costs memory space reducing accuracy. It has...
We propose a more accurate and efficient reconstruction method used in testing large aspheric surfaces with annular subaperture interferometry. By the introduction of Zernike polynomials that are orthogonal over region, proposed here eliminates coupling problem earlier algorithm based on circle polynomials. Because complexity recurrence definition polynomials, general symbol representation computing program is established. The implementation for provided detail. performance evaluated some...
We have proposed a new absolute method to test rotationally asymmetric surface deviation. Relying on the high accuracy of Zernike polynomial fitting with least-squares algorithm for low-frequency component and preserving high-frequency averaging method, can guarantee measurement result fewer rotational measurements compared traditional multiangle method. It realizes balance between efficiency measurements. has been verified by experiments; root mean square (rms) residual figure two methods...