机构

• 长春光学精密机械与物... [4]
• 遥感与数字地球研究所 [2]
• 上海光学精密机械研究... [2]
• 国家空间科学中心 [1]
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• OAI收割 [11]
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• 会议论文 [6]
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• 2016 [2]
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• 光存储 [2]
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浏览/检索结果: 共12条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Yb-doped large-mode-area aluminosilicate laser fibre fabricated by chelate precursor doping technique 期刊论文  OAI收割 electronics letters, 2016, 卷号: 52, 期号: 23, 页码: 1942-u42 作者:  Peng, Kun;  Wang, Zhen;  Zhan, Huan;  Ni, Li;  Gao, Cong 收藏  |  浏览/下载：117/0  |  提交时间：2016/11/22 ytterbium  aluminium compounds  doping  optical fibre fabrication  optical fibre testing  electron probe analysis  secondary ion mass spectroscopy  laser beams  optical fibre amplifiers  AlSiO:Yb  power 1 kW  efficiency 81  0 percent  slope efficiency  laser output  two-stage master oscillator power amplifier system  time-of-flight secondary ion mass spectrometry  electron probe microanalysis  fibre testing  numerical aperture  homogeneous large-core preform  gas flow control system  high-purity materials  chelate precursor doping technique  large mode area aluminosilicate laser fibre   Calibration of compact polarimetric sar images using distributed targets and one corner reflector 期刊论文  iSwitch采集 Ieee transactions on geoscience and remote sensing, 2016, 卷号: 54, 期号: 8, 页码: 4433-4444 作者:  Tan, Hong;  Hong, Jun 收藏  |  浏览/下载：32/0  |  提交时间：2019/05/09 Calibration  Compact polarimetry (cp)  Numerical methods  Synthetic aperture radar (sar)   Synthetic aperture radar image despeckling via total generalised variation approach 期刊论文  OAI收割 IET IMAGE PROCESSING, 2015, 卷号: 9, 期号: 3, 页码: 236-248 作者:  Feng, Wensen 收藏  |  浏览/下载：25/0  |  提交时间：2015/09/21 synthetic aperture radar  radar imaging  image denoising  speckle  variational techniques  piecewise constant techniques  smoothing methods  higher order statistics  optimisation  Monte Carlo methods  synthetic aperture radar image despeckling  total generalised variation approach  speckle reduction  total variation regularisation  piecewise constant image  smooth transition  TGV-based model  staircasing artefact reduction  higher order smoothness  numerical scheme  Nesterov algorithm  TGV-based optimisation problem  Monte Carlo method   A multi-scale SAR segmentation based on hierarchical merging 会议论文  OAI收割 Progress in Electromagnetics Research Symposium, PIERS 2013 Taipei,, Taipei, Taiwan, March 25, 2013 - March 28,2013 Ye, Xi; Liu, Meng; Zhang, Hong; Wang, Chao 收藏  |  浏览/下载：18/0  |  提交时间：2014/12/07 Numerical methods  Merging  Speckle  Synthetic aperture radar   MTF-based research on the minimum fill factor in optical sparse aperture system (EI CONFERENCE) 会议论文  OAI收割 2011 4th International Conference on Intelligent Computation Technology and Automation, ICICTA 2011, March 28, 2011 - March 29, 2011, Shenzhen, Guangdong, China 作者:  Liu Z. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 To avoid the loss of image information when it is transferred through optical sparse aperture system with excessively diluted apertures arrangement  we propose a method in the frequency domain termed characteristic triangle to calculate the minimum fill factor. This method is based on the characteristics of MTF and demonstrates that when the characteristic triangle is equilateral with each side 3th power of sub-MTF cutoff frequency  MTF has no zero value below cutoff frequency  thus we can obtain the minimum fill factor. Furthermore  we apply it to some typical sparse arrays  such as Golay3  Golay6  Ring6 and Tri-arm7  and get their fill factors of 33.33%  15.16%  30.11%  and 11.14% correspondingly  which are consistent with numerical results. 2011 IEEE.   Imaging algorithm for synthetic aperture interferometric radiometer in near field 期刊论文  OAI收割 SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2011, 卷号: 54, 期号: 8, 页码: 2224-2231 作者:  Zhang Cheng;  Wu Ji;  Liu Hao;  Yan JingYe 收藏  |  浏览/下载：28/0  |  提交时间：2014/12/15 synthetic aperture interferometric radiomter (SAIR)  near field imaging  numerical method  pseudo inversion   Transmission properties of multiband fss based on fractal elements (EI CONFERENCE) 会议论文  OAI收割 2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010, November 29, 2010 - December 2, 2010, Guangzhou, China 作者:  Gao J. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 Self-similar fractal elements that has multiband properties can be advantageously exploited to design simple  multiband FSS on single screen. In this paper  fractal Y aperture FSS has been designed using recursive technology and the periodic method of moments(PMoM) is employed to characterize the transmission properties of FSS as band-pass filters. The frequency response to the structure parameters when electromagnetic wave incident with different angles and polarizations is discussed and the numerical analysis show good correlation to the measured results. 2010 IEEE.   Annular sub-aperture stitching interferometry for testing of large asphreical surfaces (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China 作者:  Zheng L.-G.;  Zhang X.-J.;  Deng W.-J.;  Wang X.-K. 收藏  |  浏览/下载：76/0  |  提交时间：2013/03/25 Annular subaperture stitching interferometric technology can test large-aperture  and the PV and RMS of residual error of the full aperture phase distribution is 0.027 and 0.0023  high numerical aperture aspheric surfaces with high resolution  the relative error of PV and RMS is -0.53% and -0.31%  respectively. The results conclude that this splicing model and algorithm are accurate and feasible. So it provides another quantitive measurement for test aspheric surfaces especially for large aperture aspheres besides null-compensation.  low cost and high efficiency without auxiliary null optics. In this paper  the basic principle and theory of the stitching method are introduced  the reasonable mathematical model and effective splicing algorithm are established based on simultaneous least-squares method and Zernike polynomial fitting. The translation errors are eliminated from each subaperture through the synthetical optimization stitching mode  it keeps the error from transmitting and accumulating. The numerical simulations have been carried on by this method. As results  the surface map of the full aperture after stitching is consistent to the input surface map  the difference of PV error and RMS error between them is -0.0074 and -0.00052 ( is 632.8nm)  respectively   The origin of the super-resolution via a nonlinear thin film 期刊论文  OAI收割 opt. commun., 2008, 卷号: 281, 期号: 6, 页码: 1654, 1661 魏劲松; Xiao Mufei 收藏  |  浏览/下载：1479/210  |  提交时间：2009/09/22 Annular rings  Local field intensity  Numerical aperture  Optical index  Spatial frequency   Super-resolution scanning laser microscopy with a third-order optical nonlinear thin film 期刊论文  OAI收割 appl. phys. b-lasers opt., 2008, 卷号: 91, 期号: 2, 页码: 337, 341 魏劲松; Xiao M. 收藏  |  浏览/下载：1113/230  |  提交时间：2009/09/22 Nonlinear thin films  Numerical aperture  Scanning laser microscopy