A5068994843- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Geophysics and Sensor Technology
- Advanced Image Processing Techniques
- Image and Signal Denoising Methods
- Diamond and Carbon-based Materials Research
- Mechanical and Optical Resonators
- Surface Roughness and Optical Measurements
- Image Processing Techniques and Applications
- Advanced Sensor and Energy Harvesting Materials
- Satellite Image Processing and Photogrammetry
- Advanced MEMS and NEMS Technologies
- Semiconductor Lasers and Optical Devices
- Blind Source Separation Techniques
- Optical measurement and interference techniques
National Central University
2021-2022
Chongqing University
2018-2019
Institute of Optics and Electronics, Chinese Academy of Sciences
2009
University of Chinese Academy of Sciences
2009
Noise estimation for image sensor is a key technique in many pre-processing applications such as blind de-noising. The existing noise methods additive white Gaussian (AWGN) and Poisson-Gaussian (PGN) may underestimate or overestimate the level situation of heavy textured scene image. To cope with this problem, novel homogenous block-based method proposed to calculate these noises paper. Initially, noisy transformed into map local gray statistic entropy (LGSE), weakly blocks can be selected...
In this paper, a novel, hybrid-integrated, high-precision, vacuum microelectronic accelerometer is put forward, based on the theory of field emission; consists sensitive structure and an ASIC interface (application-specific integrated circuit). The has cathode cone tip array, folded beam, emitter electrode, feedback electrode. sensor fabricated double-sided polished (1 0 0) N-type silicon wafer; array shaped by wet etching with HNA (HNO₃, HF, CH₃COOH) metalized TiW/Au thin film. finally...
The interaction matrix of an adaptive optical system is directly computed. In this method, based on the correlation between measured and theoretical slope influence vectors selected actuators, misalignment wavefront sensor corrector first estimated, then more close to real one obtained. Experimental results show that with considering misalignment, acquired by direct computation becomes effective in closed-loop correction, residual error reduced.
Ultrashort pulsed laser is a promising tool for processing transparent materials. We report on new approach that simultaneously creates pair of conjugate grooves the bottom surface thin glass substrate at duration plowing V-shaped microgroove top using technique direct ablation. propose hypothesis to explain accompanying grooves' formation mechanism and simulate Maxwell's equations verify its applicability. Measurements showed roughness groove's sidewalls was 0.14 μm. This method requires no...
The tracking errors of large-caliber optical telescope in the process observing astral target consists jitter error which is mainly caused by wind-load, and wave-front tilt atmospheric turbulence. A simplified model concerning established, a new kind algorithm based on AR to separate from turbulence proposed. Finally, an experiment conducted platform 1.8 M Gaomeigu Observing Station test this algorithm. Experimental results show that wind-load directly related direction speed wind, conforms...