中国科学院机构知识库网格系统: 检索

Design of Large Aperture and Large Field of View Receiving Optical System Based on Catadioptric System 会议论文 OAI收割
Virtual, Online, China, 2022-12-18
作者: Chao, Li; Yingjun, Ma; Youhui, Huo; Weining, Chen

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收藏 | 浏览/下载：30/0 | 提交时间：2023/03/02

Large Aperture Large Field of View Cassegrain System Optical Design Imaging Quality

Research on key technologies of hyperspectral imaging system for spaceborne water environment remote sensing monitoring 会议论文 OAI收割
Virtual, Online, China, 2022-12-18
作者: Song, Shuyao; Liu, Xiao; Wang, Xueji; Liu, Yuyang; Liu, Hong

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收藏 | 浏览/下载：36/0 | 提交时间：2023/03/13

remote sensing monitoring hyperspectral imaging Cassegrain

In situ analysis of steel melt by double-pulse laser-induced breakdown spectroscopy with a Cassegrain telescope 期刊论文 OAI收割
Spectrochimica Acta - Part B Atomic Spectroscopy, 2015, 卷号: 112, 页码: 40-48
作者: Sun LX(孙兰香); Yu HB(于海斌); Cong ZB(丛智博); Xin Y(辛勇); Li Y(李洋)

收藏 | 浏览/下载：30/0 | 提交时间：2015/09/19

Laser-induced breakdown spectroscopy Double-pulse In situ analysis Cassegrain telescope Liquid steel

Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：62/0 | 提交时间：2013/03/25

The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope the structure should have high stiffness and high reliability and light weight. Compared with invar aluminum alloy and titanium alloy carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages such as ultra-light weight high stiffness and dimensional stability etc. The optimization method and the baffle design can be helpful to other coaxial telescopes such as Cassegrain Gregorian and their subdivisions. 2012 IEEE.

The application of diagnostic equipment in the Tokamak fusion reaction (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, November 6, 2011 - November 9, 2011, Beijing, China
Zhang B.-S.; Chang J.; Gong X.-Z.; Gan J.-F.; Feng S.-L.

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/25

This paper introduces the infrared optical system in the Tokamak fusion reaction device. In this optical system 3.the relay group lenses. This paper describes the decrease of the modulation transfer function (MTF) when the temperature changes and how to compensate the decrease of the MTF in order to maintain the image quality in a high level. As a result the traditional optical structure can't meet the requirements 2.the Cassegrain system the image quality of this optical system can reach the requirements when the temperature changes. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE). because the length of the infrared optical system in the Tokamak is very long. The design of optical system in the detection facility includes three parts:1.the combination of the concave aspheric mirror and flat mirror

Design and wavefront sensing for the segmented Spherical Primary Optical Telescope 会议论文 OAI收割
2011 international conference on electronic and mechanical engineering and information technology, emeit 2011, harbin, china, august 12, 2011 - august 14, 2012
ShengzhangKai; FanXuewu; LiChuang; LiuKai

收藏 | 浏览/下载：18/0 | 提交时间：2012/07/10

high-resolution SPOT on-orbit cophasing segmented spherical primary mirror quasi-Cassegrain telescope wavefront sensing and control Diffraction-limited

Optical system of golay-3 synthetic aperture telescope of Fizeau style (EI CONFERENCE) 会议论文 OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
作者: Sun Z.-Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

In order to get high resolution the field of view is 4. Analyzed the imaging a optical system of golay-3 synthetic aperture telescope has been designed which adopt Fizeau multi-telescope frame. The angular magnification of sub-aperture is -4 the fill factor is 113. The configuration of light beam combiner is Cassegrain style added a lens. The total focal length is 6000mm the PSF have been improved remarkably and the cut-off frequency of MTF is close to that of full aperture. 2010 IEEE.

Athermalization of coaxial reflective space telescope (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China
Lei Z.; Guang J.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

This paper focuses on thermal effects which caused by environmental temperature changes on coaxial reflective space telescope and its solution. Curvature radius and center thickness of optical elements and the space distance between optical elements may be changed by thermal effects. And the optical performance of the telescope may be impacted. Based on the analysis of thermal effects on coaxial reflective space telescope athermalized design techniques are emphatically presented the advantages and the disadvantages of the three athermalizations used currently are compared in the paper. The feasibility and effectiveness are verified by an example of a cassegrain space telescope. 2010 Copyright SPIE - The International Society for Optical Engineering.

Reflective foveated optical imaging system based on liquid crystal spatial light modulator (EI CONFERENCE) 会议论文 OAI收割
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
Peng Q.-Q.; Chang J.; Feng S.-L.; Wang R.-R.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Based on reflective liquid crystal spatial light modulator (SLM) a new foveated optical imaging system is proposed. High quality imaging can be realized at any region of interest (ROI) within the field-of-view (FOV) by utilizing the SLM to correct the aberration of different regions dynamically. A reflective cassegrain optical structure is proposed which is designed optimized and matched with the reflective SLM to construct a more practical foveated imaging system. This reflective imaging system has a large aperture so that enough light can reach the image plane. It also makes the total length of the system shorter and therefore more practical. We also simulate and analyze the system. This kind of foveated optical imaging system can be applied in wide FOV imaging aspects to reduce bandwidth and optics complexity and to achieve weight reduction and miniaturization. 2010 Copyright SPIE - The International Society for Optical Engineering.

大口径长焦距平行光管光学系统设计 学位论文 OAI收割
硕士: 中国科学院西安光学精密机械研究所., 2009
吕保斌

收藏 | 浏览/下载：149/0 | 提交时间：2011/10/09

平行光管 Cassegrain 矢量像差理论无焦校正板尼克系数