中国科学院机构知识库网格系统: 检索

A Fitting Method of Inverting Ozone Concentration Profile Using Ultraviolet Differential Charge-Coupled Device Imaging Lidar 期刊论文 OAI收割
PHOTONICS, 2023, 卷号: 10
作者: Shan, Huihui; Zhang, Hui; Ma, Xiaomin; Cao, Kaifa; Ji, Chengli

|

收藏 | 浏览/下载：17/0 | 提交时间：2023/11/10

CCD imaging simulation ozone aerosol aerosol wavelength index

Characterization of Imaging System for Satellite-Borne Polarization Camera Based on Scientific Grade CCD 期刊论文 OAI收割
IEEE TRANSACTIONS ON ELECTRON DEVICES, 2022
作者: Yao, Pingping; Lu, Meina; Xu, ZhiLong; Tu, Bihai; Sun, Liang

|

收藏 | 浏览/下载：45/0 | 提交时间：2022/12/23

Charge coupled devices Imaging Timing Clocks Signal to noise ratio Pins Dynamic range Charge-coupled device (CCD) imaging cloud and aerosol polarization camera (CAPC) frame transfer instrumentation linearity satellite sensor signal-to-noise ratio (SNR)

Research on the Single Event Effect of CCD Analog Front-end for Satellite-borne directional polarization camera 会议论文 OAI收割
Shanghai, China, 2020-10-17-2020-10-20
作者: Ping-ping Yao

|

收藏 | 浏览/下载：85/0 | 提交时间：2021/12/10

Directional Polarimetric Camera CCD imaging system Image processing single event effects high-energy particles single event latch-up heavy-ion Analog front end

静止轨道星载差分吸收光谱仪CCD成像系统设计 期刊论文 OAI收割
光子学报, 2020, 卷号: 49
-

|

收藏 | 浏览/下载：21/0 | 提交时间：2020/10/26

Remote sensing Imaging spectrometer Spectral image Array CCD Timing design 遥感探测成像光谱仪光谱图像面阵CCD 时序设计

云相机控制系统的设计及实现 期刊论文 OAI收割
光学学报, 2020, 卷号: 40
作者: 石晶晶; 胡亚东; 李孟凡; 孙斌; 王改

|

收藏 | 浏览/下载：32/0 | 提交时间：2021/11/29

atmospheric optics cloud camera on-ship programmable system CCD imaging system performance test 大气光学云相机片上可编程系统 CCD成像系统性能测试

Study on High Precision Magnification Measurement of Imaging Systems 期刊论文 OAI收割
Guangxue Xuebao/Acta Optica Sinica, 2018, 卷号: 38, 期号: 7
作者: Dong, Guanji; Tang, Feng; Wang, Xiangzhao; Feng, Peng; Guo, Fudong

|

收藏 | 浏览/下载：14/0 | 提交时间：2019/09/17

Interferometry CCD cameras Diffraction Imaging systems Measurement Uncertainty analysis

Research on the Method of Transient Spectrum Detection Based on Array CCD 期刊论文 OAI收割
spectroscopy and spectral analysis, 2012, 卷号: 32, 期号: 4, 页码: 1028-1031
作者: Zhu Bing-li; Bai Yong-lin

收藏 | 浏览/下载：25/0 | 提交时间：2015/07/02

Linear CCD Array CCD CCD high speed imaging Transient spectrum detection

Comparison and simulation of subpixel imaging modes for linear CCD (EI CONFERENCE) 会议论文 OAI收割
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
作者: Li Y.; He B.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：37/0 | 提交时间：2013/03/25

Subpixel technique of linear CCD is effective to enhance the spatial resolution without increasing the focal length of optics and reducing the pixel size. To compare image quality of two main subpixel imaging modes quincunx sampling and four-point sampling a method to quantitatively evaluate image quality of subpixel based on MTF was proposed. The MTF of quincunx and four-point sampling modes were derived. Analytical results shows that theoretical limiting resolution of quincunx sampling and four-point sampling is improved to 1.4 and 1.86 times respectively and MTF values at Nyquist frequency of two modes are increased by 0.1106 and 0.1679 respectively. MTFA in (0 0.5) of two subpixel imaging modes were calculated and results illustrates that four-point sampling offers much more improvement with image quality than quincunx sampling at the cost of double amount of data. A model for simulating subpixel imaging using Matlab was established and simulation results of spoke target verify the theoretical analysis. (2012) Trans Tech Publications Switzerland.

The research on statistical properties of TDI-CCD imaging noise (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu Y.-Y.; Shen X.-H.; He G.-X.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

TDI-CCD can improve the sensitivity of space camera without any degradation of spatial resolution which is widely used in aerospace imaging devices. The article describes the basic working principle and application characteristics of TDI-CCD devices analyses the composition of TDI-CCD imaging noise and propose a new method to analyze TDI-CCD imaging noise with statistical probability distribution. In order to estimate the distribution of gray values affect by noise we introduced the concept of skewness and kurtosis. We design an experiment using constant illumination light source take image with TDI-CCD working at different stage such as stage 16 stage 32 stage 48 stage 64 and stage 96 analyse the characteristics of image noise with the method we proposed experimental results show that the gray values approximately meet normal distribution in large sample cases. 2011 SPIE.

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.