中国科学院机构知识库网格系统: 检索

10 kW rectangular laser beam generation with incoherent space combiner 期刊论文 OAI收割
Optik, 2022, 卷号: 260
作者: Tian, Xiao; Bai, Yang; Lei, Guangzhi; Yu, Lidong; Zhou, Jingfeng

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收藏 | 浏览/下载：83/0 | 提交时间：2022/05/07

Incoherent space laser beam combination 10 kW beam combiner Rectangular uniform beam spot Multi-beam laser volumetric heat source Finite element methods Optical lens Thermo-mechanical properties

Research on High Precision Locating of Laser Spot Center in Free-Space Laser Communication System 会议论文 OAI收割
Xi'an, China, 2021-10-15
作者: Meng, Xiangsheng; Ma, Caiwen; Tian, Yan; Han, Junfeng; Liang, Dongsheng

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收藏 | 浏览/下载：49/0 | 提交时间：2021/12/06

laser communication laser spot centroid bilinear interpolation hardware implementation

Trc-based high-precision spot position detection in inter-satellite laser communication 期刊论文 OAI收割
Sensors, 2020, 卷号: 20, 期号: 19, 页码: 1-14
作者: Li, Qing; Guo, Hongyang; Xu, Shaoxiong; Xu, Yangjie; Wang, Qiang

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收藏 | 浏览/下载：38/0 | 提交时间：2021/05/11

inter-satellite laser communication system weak light-spot position detection four-quadrant detector time reversal convolution

Improve the Detection Range of Semi-Active Laser Guidance System by Temperature Compensation of Four-Quadrant PIN Detector 期刊论文 OAI收割
Sensors, 2019, 卷号: 19, 期号: 10, 页码: 13
作者: S.Y.Gao; H.Liu; H.W.Zhang; X.Zhang; J.Chen

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收藏 | 浏览/下载：55/0 | 提交时间：2020/08/24

quadrant PIN detector (QD),temperature compensation,responsivity,semi-active laser guidance,error analysis,quadrant,spot

Tracking and Guiding Multiple Laser Beams Based on Beam and Target Alignment System 期刊论文 OAI收割
International Journal of Automation and Computing, 2015, 卷号: 12, 期号: 6, 页码: 600-610
作者: Zhang, Pengcheng(张鹏程); Xu, De(徐德)

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收藏 | 浏览/下载：24/0 | 提交时间：2018/01/05

Laser Spot Spot Segmentation Contour Tracking Visual Feedback Beam And Target Alignment

Interfacial microstructure and mechanical property of resistance spot welded joint of high strength steel and aluminium alloy with 4047 AlSi12 interlayer 期刊论文 OAI收割
Materials & Design, 2014, 卷号: 57, 页码: 186-194
W. H. Zhang; D. Q. Sun; L. J. Han; D. Y. Liu

收藏 | 浏览/下载：36/0 | 提交时间：2014/04/18

Interfacial microstructure Mechanical property Resistance spot welding Dissimilar material welded joints Interlayer zinc-based filler stainless-steel automotive applications welding parameters galvanized steel mild-steel lap joint laser layer wire

Influences of laser spot on high-speed welding for Cr-plated sheet 期刊论文 OAI收割
WELDING JOURNAL, 2013, 卷号: 92, 期号: 10, 页码: 291-296
作者: Zhan J(占剑); Yang MJ(杨明江)

收藏 | 浏览/下载：26/0 | 提交时间：2013/11/22

Laser Welding Chromium-Plated Sheet Elongated Spot Welding Speed

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：35/0 | 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:

收藏 | 浏览/下载：26/0 | 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.

Nonlinear laser focusing using a conical guide and generation of energetic ions 期刊论文 OAI收割
phys. rev. e, 2008, 卷号: 78, 期号: 3, 页码: 36405
Cao Lihua; Yu Wei; Yu M.Y.; Xu Han; He X.T.; Gu Yuqiu (7); Liu Zhanjun; Li Jinghong; Zheng Chunyang

收藏 | 浏览/下载：872/16 | 提交时间：2009/09/18

Conventional methods Energetic ions Focusing effects High-density Inner surfaces Laser focusing Laser-plasma interaction Light intensities Light pulses Particle-in-cell simulations Pulse shaping Punch-through Spot sizes Thin foils Thin target