A5028268188- Optical measurement and interference techniques
- Advanced Measurement and Metrology Techniques
- Indoor and Outdoor Localization Technologies
- Image Processing Techniques and Applications
- Robotics and Sensor-Based Localization
- Adaptive optics and wavefront sensing
- Advanced optical system design
- Optical Systems and Laser Technology
- Surface Roughness and Optical Measurements
- Industrial Vision Systems and Defect Detection
- 3D Surveying and Cultural Heritage
- Advanced Vision and Imaging
- Advanced Measurement and Detection Methods
- Advanced Image and Video Retrieval Techniques
Fudan University
2021-2024
Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing
2023
Beijing Institute of Optoelectronic Technology
2016
Beijing Institute of Technology
2013-2016
In this work, a high-performance panoramic annular lens system designed with point-by-point method and variable parameter optimization strategies is proposed. Due to the design, maintains balance among characteristic parameters can achieve <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msup> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>360</mml:mn> </mml:mrow> <mml:mo>∘</mml:mo> </mml:msup> <mml:mo>×</mml:mo> <mml:mo stretchy="false">(</mml:mo>...
Phase measuring deflectometry is a powerful method for complex optical surfaces, which captures the reflected fringe images encoded on screen under premise of focusing measured specular surface. Due to limited depth field camera, captured and surface cannot be focused at same time. To solve position-angle uncertainty issue, in this Letter, wavefront coding technology used modulate imaging deflectometry, thereby making system insensitive defocus other low-order aberration including...
Simultaneous localization and mapping (SLAM) is widely used in autonomous driving intelligent robot positioning navigation. In order to overcome the defects of traditional visual SLAM rapid motion bidirectional loop detection, we present a feature-based PAL-SLAM system for panoramic-annular-lens (PAL) camera this paper. We use mask extract match features annular effective area images. A PAL-camera model, based on precise calibration, transform matched onto unit vector subsequent processing,...
Aspheric optical components are the indispensable part of modern optics systems. With constant development aspheric fabrication technique, systems with large aperture convex widely used in astronomy and space optics. Thus, measurement figure error whole aspherical surface high precision comes to be a challenge area manufacture, testing method is also very important. This paper presents new partial compensating system by combination refractive lens reflective mirror for surface. The...
Phase-shifting interferometry is a non-contact precision precise measuring method for optical surface, but it highly sensitive to external vibrations. A time-and-frequency-domain (TFD) anti-noise phase-shifting proposed eliminate the effect of vibrations and improve measurement. According simulations preliminary experiments, active speed as well interferogram capture should be increased anti-vibration capability TFD method. In this paper, fast approach based on PZT actuator detection with...
Abstract Digital Moiré technique is adopted in partial compensation interferometer (PCI) for high-precision testing of figure error the aspheric surfaces. The measured obtained by a series calculation with real interferogram and ideal interferograms generated computer. dense interference fringes at exit pupil make it difficult to align PCI. On contrary, digital Moire composed from are sparse corresponding aspheric, making easier Generally, processed on computer, resulting slow processing...
In the integrated processing of large components in aerospace field, for end servo industrial robot positioning accuracy needs, often using binocular vision method. This method can accurately measure position but is limited by restricted field view and small depth field. So, a monocular camera needed servo-guiding arm. Therefore, estimation based on improved Yolov8 CNN fusion mobile machining with field-of-view proposed this paper. Firstly, dataset construction virtual-real to solve problem...