CORONAGRAPH

作品数：10被引量：20H指数：3
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相关期刊：《Opto-Electronic Advances》《Chinese Optics Letters》《Astronomical Techniques and Instruments》《Research in Astronomy and Astrophysics》更多>>
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A high-contrast imaging coronagraph for segmented-mirror large aperture telescopes using a spatial light modulator
《Astronomical Techniques and Instruments》2024年第3期166-170,共5页Jiangpei Dou Huanyu Dong 
supported by the National Natural Science Foundation of China (U2031210 and 11827804);Science Research from the China Manned Space Project (CMS-CSST-2021-A11 and CMS-CSST-2021-B04).
The primary mirrors of current and future large telescopes always employ a segmented mirror configuration.The small but non-negligible gaps between neighboring segments cause additional diffraction,which restricts the...
关键词：Liquid crystal spatial light modulator Amplitude apodized pupil Large aperture telescopes 
A New Method for Monitoring Scattered Stray Light of an Inner-occulted Coronagraph
《Research in Astronomy and Astrophysics》2024年第2期216-227,共12页Da-Yang Liu Hong-Xin Zhang Ming-Zhe Sun Zheng-Hua Huang Li-Dong Xia Wei-Xin Liu Hui Fu 
supported by the National Key R&D Program of China No.2021YFA0718600;the National Natural Science Foundation of China(grant Nos.41904168,42274227 and U1931122);the Chinese Meridian Project。
The scattered stray light of a coronagraph is a type of stray light that is generated by the objective lens as its surface defects are irradiated by sunlight.The defects mainly include dust and blemishes on the lens s...
关键词：SUN corona-Sun atmosphere-instrumentation miscellaneous-methods analytical-techniques image processing 
Advances in optical engineering for future telescopes被引量：15
《Opto-Electronic Advances》2021年第6期20-43,共24页Daewook Kim Heejoo Choi Trenton Brendel Henry Quach Marcos Esparza Hyukmo Kang Yi-Ting Feng Jaren NAshcraft Xiaolong Ke Tianyi Wang Ewan SDouglas 
the Gordon and Betty Moore Foundation for their financial support of the development of the MODElens and its enabling alignment technologies;the II-VI Foundation Block-Gift,Technology Research Initiative Fund Optics/Imaging Program。
Significant optical engineering advances at the University of Arizona are being made for design, fabrication, and construction of next generation astronomical telescopes. This summary review paper focuses on the techn...
关键词：computer controlled optical surfacing CCOS multiplexing dwell time optimization optical metrology telescope alignment large binocular telescope MOBIUS pupil segmentation OASIS NAUTILUS HYPERION CDEEP vector vortex coronagraph 
Design and experimental test of an optical vortex coronagraph
《Research in Astronomy and Astrophysics》2017年第6期101-106,共6页Cheng-Chao Liu De-Qing Ren Yong-Tian Zhu Jiang-Pei Dou 
supported by the National Natural Science Foundation of China(Grant Nos.11661161011,11433007,11220101001,11328302 and 11373005);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA04075200);the International Partnership Program of Chinese Academy of Sciences(Grant Nos.114A32KYSB20160018 and 114A32KYSB20160057);the special fund for astronomy of CAS(2015–2016);Part of the work described in this paper was carried out at California State University,Northridge,with support from the Mt.Cuba Astronomical Foundation
Using an optical vortex coronagraph （OVC） is one of the most promising techniques for di- rectly imaging exoplanets because of its small inner working angle and high throughput. This paper presents the design and la...
关键词：INSTRUMENTATION coronagraph- techniques optical vortex - methods LABORATORY 
A high-contrast imaging polarimeter with a stepped-transmission filter based coronagraph
《Research in Astronomy and Astrophysics》2016年第5期25-30,共6页Cheng-Chao Liu De-Qing Ren Yong-Tian Zhu Jiang-Pei Dou Jing Guo 
supported by the NSFC(Grant Nos.11220101001,11433007,11328302,11373005 and 11303064);the“Strategic Priority Research Program”of the Chinese Academy of Sciences(Grant Nos.XDA04070600 and XDA04075200);the special funding for Young Researchers of Nanjing Institute of Astronomical Optics&Technology;the special fund for astronomy(Grant No.KT2013-022)of CAS.;carried out at California State University Northridge,with support from the Mt.Cuba Astronomical Foundation
The light reflected from planets is polarized mainly due to Rayleigh scattering, but starlight is normally unpolarized. Thus it provides an approach to enhance the imaging contrast by inducing the imaging polarimetry ...
关键词：instrumentation： polarimeter coronagraph-- techniques： polarimetric -- methods： laboratory 
A high-contrast coronagraph for direct imaging of Earth-like exoplanets: design and test被引量：3
《Research in Astronomy and Astrophysics》2015年第3期453-460,共8页Cheng-Chao Liu De-Qing Ren Jiang-Pei Dou Yong-Tian Zhu Xi Zhang Gang Zhao Zhen Wu Rui Chen 
Supported by the National Natural Science Foundation of China
A high-contrast coronagraph for direct imaging of an Earth-like exoplanet at the visible band needs a contrast of 10^-10 at a small angular separation of 4λ/D or less. Here we report our recent laboratory experiment ...
关键词：instrumentation： coronagraph liquid crystal array -- techniques：apodization -- methods： laboratory 
Trapezoidal phase mask coronagraph
《Chinese Optics Letters》2015年第2期37-40,共4页曹子晨 曹清 葛亚骏 胡荣飞 朱敏宁 
An angular trapezoidal phase mask used for a wideband coronagraph is proposed. The azimuthal phase of the mask is double-periodic and has both trapezoidal and constant parts in each period. This kind of continuous pha...
关键词：TPM Trapezoidal phase mask coronagraph 
An active coronagraph using a liquid crystal array for exoplanet imaging:principle and testing被引量：1
《Research in Astronomy and Astrophysics》2012年第5期591-600,共10页Xi Zhang De-Qing Ren Yong-Tian Zhu Jiang-Pei Dou 
supported by the "Strategic Priority Research Program" of the Chinese Academy of Sciences(Grant No.XDA04070600);the National Natural Science Foundation of China(Grant Nos.11003031 and 10873024);as well as the National Astronomical Observatories' Special Fund for Astronomy-2009;Part of the work described in this paper was carried out at California State University Northridge,with support from the National Science Foundation under Grant ATM-0841440
High-contrast imaging coronagraphs, used for the detection of exoplanets, have always adopted passive coronagraph optical components. It is therefore impossible to actively optimize the coronagraphs to achieve their b...
关键词：instrumentation： coronagraph liquid crystal array - techniques high-contrast imaging exoplanet detection 
Stochastic parallel gradient descent based adaptive optics used for a high contrast imaging coronagraph被引量：3
《Research in Astronomy and Astrophysics》2011年第8期997-1002,共6页Bing Dong De-Qing Ren Xi Zhang 
Supported by the National Natural Science Foundation of China(Grant Nos. 10873024 and 11003031);supported by the National Science Foundation under Grant ATM-0841440
An adaptive optics （AO） system based on a stochastic parallel gradient descent （SPGD） algorithm is proposed to reduce the speckle noises in the optical system of a stellar coronagraph in order to further improve t...
关键词：instrumentation： adaptive optics -- methods： laboratory -- techniques： image processing CORONAGRAPH 
High-contrast coronagraph for ground-based imaging of Jupiter-like planets被引量：2
《Research in Astronomy and Astrophysics》2010年第2期189-198,共10页Jiang-Pei Dou De-Qing Ren Yong-Tian Zhu 
supported by the National Natural Science Foundation of China (NSFC) (Grant No. 10873024)
We propose a high-contrast coronagraph for direct imaging of young Jupiter-like planets orbiting nearby bright stars. The coronagraph employs a step- transmission filter in which the intensity is apodized with a finit...
关键词：instrumentation： high angular resolution- methods： laboratory numer- ical -- techniques： coronagraphy apodization -- planetary systems 
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