Research on digital calibration method for optical surface defect dimension

2012 ◽  
Author(s):  
Xiaoyu Chen ◽  
Dong Liu ◽  
Shitong Wang ◽  
Pin Cao ◽  
Xin Gao ◽  
...  
Keyword(s):  
Surface Defect ◽  
Calibration Method ◽  
Digital Calibration ◽  
Optical Surface ◽  
Defect Dimension

Digital calibration method for defects evaluation of large fine optical surfaces

2014 ◽  
Author(s):  
Xiaoyu Chen ◽  
Dong Liu ◽  
Yongying Yang ◽  
Lu Yan ◽  
Lu Li ◽  
...  
Keyword(s):  
Calibration Method ◽  
Digital Calibration ◽  
Optical Surfaces

Vision system with high dynamic range for optical surface defect inspection

2018 ◽  
Vol 57 (34) ◽  
pp. 9981 ◽  
Author(s):  
Zhaolou Cao ◽  
Fenping Cui ◽  
Chunjie Zhai
Keyword(s):  
Surface Defect ◽  
Dynamic Range ◽  
Vision System ◽  
High Dynamic Range ◽  
Optical Surface ◽  
Defect Inspection ◽  
High Dynamic

A Digital Calibration Method and Circuit for ADCs with a Fold-Interpolation and Pipeline Structure

2014 ◽  
Vol 1049-1050 ◽  
pp. 699-702
Author(s):  
Zheng Ping Zhang ◽  
Yong Lu Wang ◽  
Guang Bing Chen ◽  
Jian An Wang ◽  
Liang Chen
Keyword(s):  
Sampling Rate ◽  
Calibration Method ◽  
Digital Calibration ◽  
Analog Signal

A structure of ADCs which combines fold-interpolation and pipeline is introduced, as well as corresponding digital calibration method. The simulation shows that the performances of the ADC after calibration are improved a lot. The SFDR achieves 62dB at a sampling rate of 800MHz, when the input analog signal is at 397MHz.

scholarly journals A Digital Calibration Method for a MEMS Accelerometer based on Harmonic Self-Test

2020 ◽  
Vol 1520 ◽  
pp. 012008
Author(s):  
Dongliang Chen ◽  
Xiaowei Liu ◽  
Liang Yin ◽  
QiangFu
Keyword(s):  
Calibration Method ◽  
Digital Calibration ◽  
Mems Accelerometer ◽  
Self Test

Detection Status of Surface Defect for Precise Optical Element

2011 ◽  
Vol 291-294 ◽  
pp. 1733-1737
Author(s):  
Hong Yu Chu ◽  
Zhi Jiang Xie ◽  
Xu Xu ◽  
Li Dan Zhou ◽  
Qin Liu
Keyword(s):  
Large Scale ◽  
Surface Defect ◽  
Surface Defects ◽  
Optical Element ◽  
Solid State Laser ◽  
Optical Surface ◽  
Laser Device ◽  
Technical Problems ◽  
Detection Technology ◽  
Surface Flaws

The optical surface defects have a significant impact on functions and reliability of the whole optical system. In recent years, with the great attention on research of large-scale high-power solid-state laser device at home and abroad, the detection of optical surface defect has also been highly valued. Through continuous exploration, defect detection technology has made some achievements, but there are still some urgent technical problems to be solved. In this paper, the technology situation of optical surface defect will be summarized in two aspects: the surface cleanliness and surface flaws. Moreover, the technical difficulties and the problems which are currently facing will be analysis.

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