中国科学院机构知识库网格系统: 检索

Self-Focusing Property of Partially Coherent Beam With Non-Uniform Correlation Structure in Non-Linear Media 期刊论文 OAI收割
FRONTIERS IN PHYSICS, 2022, 卷号: 9
作者: Lu, Lu; Wang, Zhiqiang; Yu, Jiayi; Qiao, Chunhong; Lin, Rong

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收藏 | 浏览/下载：44/0 | 提交时间：2022/02/21

partially coherent beam non-uniform correlation structure optical coherence coherence radius self-focusing length

Polarization-independent beam deflection and focusing with dielectric non-resonant metasurfaces 期刊论文 OAI收割
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2017, 卷号: 50, 期号: 34
作者: Su XF; Li GH; Yang H; Zhao ZY; Yu FL

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收藏 | 浏览/下载：45/0 | 提交时间：2018/11/20

dielectric metasurfaces polarization independence focusing beam deflection

Particle-in-cell simulations of the long proton beam focusing in background plasmas 期刊论文 OAI收割
LASER AND PARTICLE BEAMS, 2016, 卷号: 34, 页码: 299-305
作者: Zhang, L. -Y.; Zhao, X. -Y.; Qi, X.; Duan, W. -S.; Yang, L.

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收藏 | 浏览/下载：30/0 | 提交时间：2018/05/31

Beam-plasma interaction Focusing effects Particle-in-cell

Focusing of 90 keV O6+ ions through a single tapered glass macrocapillary 期刊论文 OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2012, 卷号: 281, 页码: 26-29
作者: Yu, Deyang; Wang, Wei; Cai, Xiaohong; Chen, Jing; Xue, Yingli

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收藏 | 浏览/下载：18/0 | 提交时间：2018/07/05

Ion Beam Focusing Tapered Glass Capillary Highly Charged Ions

Spatial degradation of pulse contrast in the focal plane for pulsed laser beams from chirped-pulse amplification system 期刊论文 OAI收割
optik, 2012, 卷号: 123, 期号: 2012, 页码: 1704-1706
Yang QW(杨庆伟)

收藏 | 浏览/下载：15/0 | 提交时间：2013/09/07

Chirped pulse amplification, pulse contrast ratio, beam focusing

KW-output high beam quality diode laser array source (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Zhang J.; Wang L.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

With the advantages of small volume light weight high efficiency and long lifespan diode laser has been widely applied to industrial processing. Presently for laser used as processing light source needs to amount to dozens of KW per cm2 of power density how to increase power output and get smaller light spot for diode laser becomes a key problem. It is introduced that by designing beam shaping by ourselves and making use of optical system for beam blooming and focusing 808nm laser array composed of 20 bars eventually achieves the 1001.5w power output coupling efficiency at 90% 11mm2 of light spot through experiments which enables diode laser to be directly applied to cladding welding and so on. 2012 IEEE.

Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhao S.; Tian Y.-Z.; Liu L.-S.; Guo J.; Zhang H.-Y.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

In order to lead the laser beam transmit in the atmosphere convergently an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly the laser was collimated by a beam expander then the near-parallel laser beam was transmitted with a Galileo telescope system and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform so the focus of the system changed due to the tiny displacement of the concave lens. Secondly the average power of the laser spot can be measured using power meter the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm it is 10.43% of the total diameter of the laser spot. At last the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit attenuation in the atmosphere geometrical aberration of optical system and the diffraction limit and the geometrical aberration are significant in the three factors above so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.

An ellipsoidal time detector with PMT readout 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2009, 卷号: 20, 页码: 248-250
作者: Li Jiaxing; Liu Pingping; Wang Jiansong; Xiao Guoqing; Guo Zhongyan

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收藏 | 浏览/下载：19/0 | 提交时间：2018/05/31

Time of flight Ellipsoidal mirror focusing RIBLL (Radioactive Ion Beam Line in Lanzhou)

Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE) 会议论文 OAI收割
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.; Qiao Y.-F.; Wu D.-K.; Cai S.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In order to realize real-time auto-focusing for theodolite lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method this scheme has a higher accuracy faster calculation higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm which shows a bright engineering application prospect for this method. 2009 SPIE.

Laser-driven inertial ion focusing 期刊论文 OAI收割
phys. rev. e, 2009, 卷号: 79, 期号: 1, 页码: 15401
Zhuo H. B.; Yu Wei; Yu M. Y.; Xu H.; Wang X.; 沈百飞; Sheng Z. M.; Zhang J.

收藏 | 浏览/下载：988/63 | 提交时间：2009/09/18

laser fusion neutron sources particle beam focusing