中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共7条,第1-7条 帮助

条数/页: 排序方式:
Polishing performance of magnetorheological finishing with flocculated and deflocculated aqueous polishing fluid 期刊论文  OAI收割
Optical Engineering, 2019, 卷号: 58, 期号: 2, 页码: 7
作者:  
Y.Bai;  D.L.Xue;  X.J.Zhang
  |  收藏  |  浏览/下载:31/0  |  提交时间:2020/08/24
Rapid fabrication of a lightweight 2m reaction-bonded SiC aspherical mirror 期刊论文  OAI收割
Results in Physics, 2018, 卷号: 10, 页码: 903-912
作者:  
Li, L. X.;  Liu, Z. Y.;  Xue, D. L.;  Deng, W. J.;  Li, R. G.
  |  收藏  |  浏览/下载:18/0  |  提交时间:2019/09/17
High precision processing CaF2 application research based on the magnetorheological finishing (MRF) technology 会议论文  OAI收割
作者:  
Zhong, Xianyun;  Fan, Bin;  Wu, Fan
  |  收藏  |  浏览/下载:40/0  |  提交时间:2018/12/20
Variation of Surface Roughness of Ti3SiC2 Disk during Polishing in Water and Alcohols 期刊论文  OAI收割
Key Engineering Materials, 2014, 卷号: 602-603, 页码: 511-514
作者:  
Hai WX(海万秀);  Ceng JL(曾俊菱);  Meng JH(孟军虎);  Lv JJ(吕晋军)
收藏  |  浏览/下载:16/0  |  提交时间:2014/12/24
Prediction method for surface finishing of spiral bevel gear tooth based on least square support vector machine 期刊论文  OAI收割
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY, 2011, 卷号: 18, 期号: 3, 页码: 685-689
作者:  
Ma Ning;  Xu Wenji;  Wang Xuyue;  Wei Zefei;  Pang Guibing
  |  收藏  |  浏览/下载:15/0  |  提交时间:2021/02/26
Study on experiment of grinding SiC mirror with fixed abrasive (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  
Wang X.;  Zhang X.-J.;  Wang X.;  Wang X.
收藏  |  浏览/下载:21/0  |  提交时间:2013/03/25
A brand-new technology for manufacturing SiC reflecting mirror that is different from the traditional method is adopted  which is called as fixed abrasive surfacing technology. Not only the new method achieves better mirror quality with bigger diamond in diameter quickly  but also because of the fixed motion between the abrasive and workpiece and it will be good for surface finishing. During experiment  material removal characteristic which is on SiC under certain rotation speed and pressure by W7  W5  W3.5  W1.5 pellets has been tested. Through those removal curves  we come to a conclusion that the technology not only has a higher removal rate  but also has much more stability. In addition  the surface roughness experiment is mentioned. In the first stage  we achieved a mirror with surface roughness 42.758nm rms with W7 pellets. The surface roughness is descending as we change pellets with smaller diamond in diameter . At the end of experiment  a smooth surface with roughness 1.591nm rms has been achieved after using W1.5 pellets. Experiment results indicate that the technology which manufactures SiC reflecting mirror with fixed abrasive is able to replace the traditional slurry abrasive completely in certain finishing phase and also has a great foreground in application. 2009 SPIE.  
Optical fiber transmission of Q-switdied Nd:YAG pulses of 10MW peak power: Mechanism of damage to the fiber (EI CONFERENCE) 会议论文  OAI收割
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies - Advanced Optical Manufacturing and Testing Technologies, November 2, 2005 - November 5, 2005, Xian, China
作者:  
Wang L.;  Zhang Y.;  Chen W.;  Tang Y.;  Wang L.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
This paper presents theoretical analysis and experiment results of four different fibers transmitting 10MW peak power Nd: YAG laser pulse. The main factors limiting to optical fiber transmission of high power laser pulse is pointed  including air breakdown at focus area and surface damage of optical fiber. The theory of air breakdown and the fiber coupling conditions is described briefly. The results of study to the transmission properties and damage conditions are presented on the basis of four different types of optical fibers. The results of the experiments are further analyzed in the aspects of transmitting efficiency  air breakdown and surface damage. The local and foreign optical fibers  with plastic-cladding and silica-cladding  and step- index and graded- index fibers are tested separately in the experiments. The experiments showed that the imported fibers are able to transmit up to 10MW peak power laser pulse with no any visible damage  while energy density at the fiber output end surface is 3.54GW/cm2. For local fibers  damage on the input surface of both plastic-cladding and silica-cladding  step-index fibers was found obviously. The column damage to the graded index fiber was also found and investigated in the research. Damage mechanisms of fiber at high peak power laser pulses are summarized. High quality finishing of fiber end surface will improve damage threshold tremendously. The conclusion of the study is that transmitting Q-switched Nd:YAG pulses of 10MW peak power is feasible for the domestically made fibers if their end surfaces are properly processed.