中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共8条,第1-8条 帮助

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Influence of filling factor on far-field intensity distribution in coherent beam combination 期刊论文  OAI收割
ACTA PHYSICA SINICA, 2014, 卷号: 63, 期号: 9
作者:  
Tan Yi;  Li Xin-Yang
收藏  |  浏览/下载:26/0  |  提交时间:2015/07/10
Theoretical analysis about 2 pi ambiguity of the piston error in sparse optical synthetic aperture imaging system 期刊论文  OAI收割
OPTIK, 2013, 卷号: 124, 期号: 22, 页码: 5381-5384
作者:  
收藏  |  浏览/下载:22/0  |  提交时间:2015/04/17
Comparative metrics for far-field intensity and piston error in sparse optical synthetic aperture telescope system 期刊论文  OAI收割
OPTIK, 2013, 卷号: 124, 期号: 17, 页码: 2979-2984
作者:  
Liu Zheng;  Wang Sheng-Qian;  Rao Chang-Hui
收藏  |  浏览/下载:26/0  |  提交时间:2015/04/17
Mechanism of STED microscopy and analysis of the factors affecting resolution (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
Yang P.; Ai H.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
Stimulated emission depletion (STED) microscopy exploits nonlinear saturable optical transition of fluorescent molecules  allowed to overcome Abbe's diffraction-limit and provides diffraction-unlimited resolution in far-field optical microscopy. We elaborate the mechanism of STED and the conditions of depletion. The formula of STED microcopy resolution is deduced through effective point spread function (E-PSF). The STED system resolution is mainly dominated by the quality of the fluorescence depletion patterns in the focal plane. The depletion pattern is mainly affected by STED beam intensity  polarization  phase plate  primary aberrations  STED pulse shape  pulse duration and delay time. In this paper  we found related models and simulate the relationship between the depletion patterns and the parameters  and put forward effective approach to enhance the system resolution. 2010 SPIE.  
Rigorous vector analysis of diffractive microlens by using of finitedifference time-domain method (EI CONFERENCE) 会议论文  OAI收割
2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 22, 2009, Shanghai, China
作者:  
Liu Y.;  Liu H.;  Liu H.;  Liu H.;  Liu Y.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
We use finite difference time domain (FDFD) method as rigorous vector analysis model to simulate the focusing process of diffractive microlens (DML). Differing with most analysis model which the near field distributions are calculated by FDTD and then far field are obtained by using of propagation method  we obtain the fields in whole computational space by using of FDTD only. The advantages are that all the results are vector based and the computational time is saved greatly. In this paper  we present two methods to obtain wave amplitude  one is comparison method  and the other is integral method. Depending on wave amplitude in the whole computational space  one can conveniently obtain distributions of electric field intensity and calculate the time-average Poynting vector. We also present the formulation for calculating diffractive efficiency of DML based on time-average Poynting vector which denotes energy flow. As demonstration  a DML is analyzed by using of these algorithms. The time depended graphic results of FDTD show the process of wave propagation. The distribution of electric field intensity illustrates the focusing of the normal incident light. The focus pattern in the focal plane is also show. The diffractive efficiency of the DML is calculated by using of the energy flow method in this paper. The results show the high accuracy and efficiency of the model. 2009 SPIE.  
The far-field spatial coherence of Gaussian Schell-model beam in turbulence in terms of position vectors 期刊论文  OAI收割
optik, 2008, 卷号: 119, 期号: 8, 页码: 353, 358
Lu Wei; 刘立人; 孙建锋; Li Dashan
收藏  |  浏览/下载:1021/173  |  提交时间:2009/09/18
Far-field intensity distribution, M-2 factor of beams generated by Gaussian mirror resonator 期刊论文  OAI收割
optik, 2007, 卷号: 118, 期号: 11, 页码: 533, 536
邓德刚; 夏志林; Wei Chaoyang; 邵建达; 范正修
收藏  |  浏览/下载:1212/132  |  提交时间:2009/09/22
Far-field intensity distribution of beam generated by Gaussian mirror resonator 期刊论文  OAI收割
opt. commun., 2005, 卷号: 248, 期号: 1-3, 页码: 185, 189
邓德刚; Fu XY; Tian YW; Yi K; 邵建达; 范正修
收藏  |  浏览/下载:595/121  |  提交时间:2009/09/22