中国科学院机构知识库网格系统: 检索

Quality evaluation of solar magnetic field images at EUV wavelengths in digital image correlation method 期刊论文 OAI收割
Journal of Computational Methods in Sciences and Engineering, 2019, 卷号: 19, 期号: 4, 页码: 1109-1123
作者: Y.Liu; K.-F.Song; J.-L.Ma; X.-D.Wang; Z.-W.Han

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收藏 | 浏览/下载：35/0 | 提交时间：2020/08/24

Image quality,Displacement measurement,Extreme ultraviolet lithography,Image analysis,Magnetic fields,Quality control,Strain measurement

Design and Implementation of Ultraviolet Imager for Corona Discharge Detection Based on Solar-Blind AlGaN Focal Plane Arrays 会议论文 OAI收割
作者: Wang JQ; Li XJ; Wang L; Xie J; Zhang Y

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收藏 | 浏览/下载：37/0 | 提交时间：2018/11/20

AlGaN UV ultraviolet image corona discharge

NUV Star Catalog from the Lunar-based Ultraviolet Telescope Survey: First Release 期刊论文 OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2016, 卷号: 16, 期号: 11
作者: Meng, Xian-Min; Han, Xu-Hui; Wei, Jian-Yan; Wang, Jing; Cao, Li

收藏 | 浏览/下载：35/0 | 提交时间：2017/05/25

Astronomical Databases: surveys Astronomical Databases: catalogs techniques: image processing techniques: photometric ultraviolet: stars

Data processing pipeline for pointing observations of Lunar-based Ultraviolet Telescope 期刊论文 OAI收割
ASTROPHYSICS AND SPACE SCIENCE, 2015, 卷号: 358, 期号: 2
作者: Meng, Xian-Min; Cao, Li; Qiu, Yu-Lei; Wu, Chao; Wang, Jing

收藏 | 浏览/下载：27/0 | 提交时间：2016/11/10

Space vehicles: instruments Techniques: image processing Techniques: photometric Telescopes Ultraviolet: stars

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：35/0 | 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.

Development and radiance calibration of three-waveband camera (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photonics and Optoelectronics, SOPO 2010, June 19, 2010 - June 21, 2010, Chengdu, China
作者: Wang J.; Liu Y.; Liu Y.; Sun Q.; Liu Y.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

An imaging system with three-waveband sharing one lens and an area CCD was developed. By rotating different filters into the beam path the required waveband was selected. The optical system which can image in ultraviolet visible and near infrared region was designed and the signal collecting system was integrated. The optical design and system integration have some advantages such as low cost small size and light in weight. To obtain a high imaging quality the radiation calibration is carried out in order to establish the relation between the average grey level of output image and the input radiance from the integrating sphere. According to the calibration data in experiments the radiation dynamic range and the best working point of the system are determined. The experiment result shows that the dynamic range of the image system is maximal when the exposure time is 8ms in ultraviolet 0.5ms in visible and 0.125ms in near infrared region. 2010 IEEE.

The estimation of charge footprint size of ultraviolet photon counting imaging detector with induction readout 期刊论文 OAI收割
review of scientific instruments, 2009, 卷号: 80, 期号: 3
作者: Zhang, Xinghua; Zhao, Baosheng; Zhao, Feifei; Liu, Yong'an; Miao, Zhenhua

收藏 | 浏览/下载：56/0 | 提交时间：2015/08/27

ceramics germanium image resolution image sensors microchannel plates photodetectors photon counting ultraviolet detectors

Resolution performance of extreme ultraviolet telescope (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Yang L.; Chen B.; Chen B.; Liang J.-Q.; Ni Q.-L.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Extreme Ultraviolet Telescope (EUT) will image solar corona in four EUV narrow bandpasses defined by multilayered coatings deposited on normal incidence optics. In order to make sure it will get sub-arcsecond angular resolution in the mission we have to test its resolution performance on ground. The EUT is aligned by Zygo interferometer first and a global wavefront error of 0.152 peak to valley is obtained ( = 632.8nm ). Because of the difficulty of angular resolution test for EUT at its operating wavelengths we test its optical performance at visible and UV band. The method is to place the resolution test-target on the focal plane of collimator and illuminate the target by visible and UV light espectively then the collimated light will go through EUT and image at focal plane on CCD. By analysis of the images obtained in experiments we conclude that the angular resolution of EUT is 1.22 at visible light ( = 570nm ) which is very close to diffraction limit (1.20) and according to these results we estimate that the operational wavelength resolution is better than 0.32 meets design requirements. While for UV light the angular resolution is 1.53 that is different from diffraction limit (0.53) the error comes mainly from large pixel of EUV camera. 2009 SPIE.

Far ultraviolet auroral imager 期刊论文 OAI收割
Science in China Series E-Technological Sciences, 2009, 卷号: 52, 期号: 12, 页码: 3709-3714
付利平; 王咏梅; 王英鉴; 张仲谋; 吕建功

收藏 | 浏览/下载：38/0 | 提交时间：2014/04/30

far ultraviolet auroral morphology image emissions atmosphere spacecraft

Spectral Response Measurement of FUV Image Intensifier 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 卷号: 29, 期号: 5, 页码: 1375-1377
作者: Fu, LP; Wang, YM; Tao Y(陶冶); Tao, Y

收藏 | 浏览/下载：21/0 | 提交时间：2016/06/29

Far ultraviolet Image intensifier Spectral response distribution Synchrotron radiation