检索结果-南通市图书馆

Ground-layer adaptive optics for the New Vacuum Solar Telescope:Instrument description and first results

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 200-210页

作者： Lanqiang Zhang Hua Bao xuejun rao Youming Guo Libo Zhong Xian Ran Nanfei Yan Jinsheng Yang Cheng Wang Jiahui Zhou Ying Yang Yunyao Long Xinlong Fan Zhongyi Feng Donghong Chen Changhui rao The Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China The Laboratryon Adaptive Optics Institute of Optics and ElectronicsChinese Academyof SciencesChengdu 629China University of Chinese Academy of Sciences Beijing 100049China

Ground-layer adaptive optics(GLAO)has shown its potential for use in solar observation owing to its wide field-of-view(FOV)correction.A high-order GLAO system that consists of a multiple direction Shack-Hartmann wavefront sensor(WFS),a realtime controller with a multi-CPU processor,and a 151-element deformable mirror was developed for the 1-m New Vacuum Solar Telescope at Yunnan Observatories,Chinese Academy of Sciences.A hexagonal microlens with 9×8 subapertures is employed in the *** detection FOV is 42′′×37′′,in which 9(3×3)guide regions are extracted for multiple direction wavefront sensing with a frame rate of up to 2200 *** our knowledge,this is the first professional solar GLAO system used as a regularly operating instrument for scientific *** installation and adjustment were performed in the summer of *** this article,a detailed account of the GLAO system and its first light results and a comprehensive analysis of the performance of the GLAO system are *** results show that this system can effectively improve the imaging quality after compensating for the wavefront aberration due to ground-layer turbulence.

关键词： adaptive and segmented optics solar instruments astronomical observations

High-resolution visible imaging with piezoelectric deformable secondary mirror: experimental results at the 1.8-m adaptive telescope

在线全文

学校读者我要写书评

暂无评论

Opto-Electronic Advances 2023年第12期6卷 15-26页

作者： Youming Guo Kele Chen Jiahui Zhou Zhengdai Li Wenyu Han xuejun rao Hua Bao Jinsheng Yang Xinlong Fan Changhui rao The Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China University of Chinese Academy of Sciences Beijing 100049China School of Electronic Electrical and Commutation EngineeringUniversity of Chinese Academy of ScienceBeijing 100049China National Key Laboratory of Optical Field Manipulation Science and Technology Chengdu 610209China.

Integrating deformable mirrors within the optical train of an adaptive telescope was one of the major innovations in astronomical observation technology,distinguished by its high optical throughput,reduced optical surfaces,and the incorporation of the deformable ***,voice-coil actuators are used,which require additional position sensors,internal control electronics,and cooling systems,leading to a very complex *** deformable secondary mirror technologies were proposed to overcome these ***,a high-order piezoelectric deformable secondary mirror has been developed and installed on the 1.8-m telescope at Lijiang Observatory in China to make it an adaptive *** system consists of a 241-actuator piezoelectric deformable secondary mirror,a 192-sub-aperture Shack-Hartmann wavefront sensor,and a multi-core-based real-time *** actuator spacing of the PDSM measures 19.3 mm,equivalent to approximately 12.6 cm when mapped onto the primary mirror,significantly less than the voicecoil-based adaptive telescopes such as LBT,Magellan and *** a result,stellar images with Strehl ratios above 0.49 in the R band have been *** our knowledge,these are the highest R band images captured by an adaptive telescope with deformable secondary ***,we report the system description and on-sky performance of this adaptive telescope.

关键词： adaptive optics deformable secondary mirror visible imaging

EAST-Educational Adaptive-optics Solar Telescope

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2022年第6期22卷 33-41页

作者： Changhui rao xuejun rao Zhimao Du Hua Bao Cheng Li Jinlong Huang Youming Guo Libo Zhong Qing Lin Xin Ge Jinsheng Yang Xinlong Fan Yangyi Liu Dan Jia Xin Li Mei Li Ming Zhang Yuntao Cheng Jiahui Zhou Jiawen Yao Lanqiang Zhang Naiting Gu The Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China The Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China The University of Chinese Academy of Sciences Beijing 100049China Shanghai Astronomy Museum Shanghai 201306China Sichuan Police College Luzhu 646000China

For the public having a better understanding of solar activities,the Educational Adaptive-optics Solar Telescope(EAST)was built in July 2021 and is located at the Shanghai Astronomy *** EAST consists of a 65 cm aperture solar telescope with a 177-element adaptive optics system and two-channel high resolution imaging system at the Hαand TiO bands,in addition to three full disk solar telescopes at CaK,Hαand TiO bands equipped on the tube of the main *** this paper,the configuration of the EAST is *** performance and on-sky observational results are *** EAST,to our knowledge,is the most advanced solar telescope for the popularization of science in the *** to its excellent performance,the data acquired by the EAST can also be used for research on solar physics and space weather prediction.

关键词： instrumentation adaptive optics-instrumentation high angular resolution-techniques high angular resolution-Sun general

用于太阳米粒图像相关的绝对差分算法和绝对差分平方算法的性能比较

在线全文

学校读者我要写书评

暂无评论

激光与光电子学进展 2017年第5期54卷 159-166页

作者：周航成饶学军饶长辉中国科学院自适应光学重点实验室四川成都610209 中国科学院光电技术研究所四川成都610209 中国科学院大学北京100049

在太阳自适应光学系统中,通常需要利用太阳米粒结构等低对比度扩展目标采用相关算法测量波前误差。在对绝对差分算法和绝对差分平方算法在抛物线插值情况下的测量误差进行了理论分析比较的基础上,利用实际采集的太阳米粒图像对这两种算... 详细信息

在太阳自适应光学系统中,通常需要利用太阳米粒结构等低对比度扩展目标采用相关算法测量波前误差。在对绝对差分算法和绝对差分平方算法在抛物线插值情况下的测量误差进行了理论分析比较的基础上,利用实际采集的太阳米粒图像对这两种算法进行了实验验证。分析和实验结果表明,太阳米粒图像绝对差分平方算法所得到的相关函数相比绝对差分算法更符合抛物面分布。采用抛物线插值时,绝对差分平方算法的测量精度优于绝对差分算法。

关键词：图像处理抛物线插值绝对差分算法绝对差分平方算法太阳米粒图像

Solar adaptive optics systems for the New Vacuum Solar Telescope at the Fuxian Lake Solar Observatory

在线全文

学校读者我要写书评

暂无评论

Astronomical Techniques and Instruments 2024年第2期1卷 95-104页

作者： Lanqiang Zhang xuejun rao Hua Bao Youming Guo Jinsheng Yang Nanfei Yan Xian Ran Dingkang Tong Xinlong Fan Zhongyi Feng Changhui rao National Laboratory on Adaptive Optics Chengdu 610209China The Laboratory on Adaptive Optics Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China University of Chinese Academy of Sciences Beijing 100049China

Adaptive optics(AO)is essential for high-quality ground-based observations with large telescopes because it counters the impact of wavefront aberrations caused by atmospheric *** new vacuum solar telescope(NVST)is one of the most important high-resolution solar observation instruments in the *** sets of solar adaptive optics systems have been developed and installed on this telescope:conventional adaptive optics,ground layer adaptive optics,and multi-conjugate adaptive *** have been in operation from 2018 to *** paper details the development and application of solar adaptive optics on the NVST and discusses the newest instrumentation.

关键词： Solar observation Adaptive optics Multi-conjugate adaptive optics

模糊自整定比例积分控制在空间三维纳米定位台的应用

在线全文

学校读者我要写书评

暂无评论

光学技术 2012年第2期38卷 202-207页

作者：舒强施宁平饶学军中国科学院自适应光学重点实验室四川成都610209 中国科学院光电技术研究所四川成都610209 中国科学院研究生院北京100039

介绍了一种空间三自由度纳米定位平台,其应用背景为光刻投影物镜波像差检测系统的精密对准,因此对定位精度和定位速度都提出了很高的要求。首先简要介绍了空间三维纳米定位台;然后将模糊控制同传统PI(比例积分)控制相结合,利用定位偏差... 详细信息

介绍了一种空间三自由度纳米定位平台,其应用背景为光刻投影物镜波像差检测系统的精密对准,因此对定位精度和定位速度都提出了很高的要求。首先简要介绍了空间三维纳米定位台;然后将模糊控制同传统PI(比例积分)控制相结合,利用定位偏差和偏差变化率信息,通过模糊推理实时调整PI控制参数,并在VC++环境下实现了模糊自整定PI参数的控制算法。实验结果表明,该控制方法较常规PI控制器能够有效地提高响应速度,减小阶跃响应超调量,保证了控制的实时性。

关键词：压电驱动器纳米定位精密对准模糊控制

The Educational Adaptive-optics Solar Telescope at the Shanghai Astronomy Museum

在线全文

学校读者我要写书评

暂无评论

Astronomical Techniques and Instruments 2024年第3期1卷 171-178页

作者： Zhimao Du Qing Lin xuejun rao Yue Zhong Jiawen Yao Hua Bao Libo Zhong Yu Liang Hui Zhang Shanghai Astronomy Museum Shanghai 201306China National Laboratory on Adaptive Optics Chengdu 610209China The Laboratory on Adaptive Optics Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China

The Educational Adaptive-optics Solar Telescope(EAST)at the Shanghai Astronomy Museum has been running routine astronomical observations since *** is a 65-cm-aperture Gregorian solar telescope for scientific education,outreach,and *** telescope system is designed in an“open”format so that the solar tower architecture can be integrated with it,and visitors can watch the observations live from inside the *** with adaptive optics,a high-resolution imaging system,and an integral field unit spectro-imaging system,this telescope can obtain high-resolution solar images in the TiO and Hαbands,and perform spectral image reconstruction using 400 optical fibers at selected *** can be used not only in public education and scientific outreach but also in solar physics research.

关键词： Astronomy museum Sun observation Adaptive optics Integral field unit

First light of the 1.8-m solar telescope–CLST

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第10期63卷 133-134页

作者： ChangHui rao NaiTing Gu xuejun rao Cheng Li LanQiang Zhang JinLong Huang Lin Kong Ming Zhang YunTao Cheng Yi Pu Hua Bao YouMing Guo YangYi Liu JinSheng Yang LiBo Zhong ChangJun Wang Kai Fang XiaoJun Zhang DongHong Chen Cheng Wang XinLong Fan ZhiWu Yan KeLe Chen XiYa Wei Lei Zhu Hong Liu YongJian Wan Hao Xian WenLi Ma Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China University of Chinese Academy of Sciences Beijing 100049China Department of Road Traffic Management Sichuan Police CollegeLuzhou 646000China

Large-aperture solar telescopes play an important role in solar observations and research,and require high temporal and spatial resolution[1].To solve some fundamental problems such as the solar dynamo,coronal heating,and the triggering of major solar eruptions,the spatial resolution for solar-atmosphere observation should reach at least 0.1 arcsec[2].

关键词： telescope eruption observations

在线全文

学校读者我要写书评

暂无评论

光纤型光学相干层析技术系统的眼科成像

中国激光 2008年第9期35卷 1429-1431页

作者：史国华丁志华戴云饶学军张雨东中国科学院光电技术研究所浙江大学现代光学仪器国家重点实验室浙江杭州310027

建立了一套单模光纤型光学相干层析(OCT)成像系统,开展了动物眼睛的成像实验,实现了高信噪比、高分辨率、大成像深度的层析图像的获取。系统纵向分辨率达到9μm,横向分辨率为10μm,最大层析成像深度可达3.4 mm。实验图像和商业蔡氏三代... 详细信息

建立了一套单模光纤型光学相干层析(OCT)成像系统,开展了动物眼睛的成像实验,实现了高信噪比、高分辨率、大成像深度的层析图像的获取。系统纵向分辨率达到9μm,横向分辨率为10μm,最大层析成像深度可达3.4 mm。实验图像和商业蔡氏三代光学相干层析技术成像的对比结果表明,研制的OCT系统已经能展示视网膜的基本分层结构,而且能分辨脉络膜的分层结构和脉络膜血管,后者是蔡氏三代OCT系统所无法实现的。

关键词：医用光学与生物技术生物医学成像光学相干层析眼科光学