中国科学院机构知识库网格系统: 检索

Adaptive Spiral Tool Path Generation for Diamond Turning of Large Aperture Freeform Optics 期刊论文 OAI收割
Materials, 2019, 卷号: 12, 期号: 5, 页码: 15
作者: D.F.Wang; Y.X.Sui; H.J.Yang; D.Li

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收藏 | 浏览/下载：14/0 | 提交时间：2020/08/24

freeform optics,slow tool servo,tool path generation,large aperture,optics,surfaces,design,Materials Science

Study of the impact of co-phasing errors for segmented primary mirror using nonlinear analysis 期刊论文 OAI收割
Optik, 2019, 卷号: 191, 页码: 80-88
作者: H.S.Yang; X.J.Zhang; Z.L.Li; X.K.Wang; M.M.Xu

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收藏 | 浏览/下载：43/0 | 提交时间：2020/08/24

Ultra large aperture,Space-based telescope,Segmented primary mirro,Co-phasing error,Wavefront deformation,piston error,telescopes,Optics

A method based on exact constraint for supporting space-based large mirror with a diameter of 2.8m 期刊论文 OAI收割
Optik, 2019, 卷号: 179, 页码: 499-504
作者: Z.S.Wang; J.X.Zhang

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收藏 | 浏览/下载：28/0 | 提交时间：2020/08/24

Large aperture mirror,Exact constraint,Flexible structure,Finite,element analysis,Optics

Design and analysis for the multi-point flexible support structure of large and precision lens 期刊论文 OAI收割
Optik, 2019, 卷号: 193, 页码: 8
作者: L.M.Zhang; W.P.Wang; J.L.Wang; P.Guo; L.Hao

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收藏 | 浏览/下载：39/0 | 提交时间：2020/08/24

Ground-based telescope system,Large aperture lens,Rigidity of the,support structure,Wave-front aberration,Optics

Laser beacon adaptive optics ophthalmoscope for retinal multilayer imaging (EI CONFERENCE) 会议论文 OAI收割
2nd International Symposium on Bioelectronics and Bioinformatics, ISBB 2011, November 3, 2011 - November 5, 2011, Suzhou, China
作者: Xuan L.; Zheng X.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

A flood-illuminated adaptive optics ophthalmoscope for retinal multilayer imaging is introduced in this paper. By arranging an alterable stop in the illumination path the illuminated area of retinal layer can be changed. A laser beacon for wavefront sensing is formed when the stop is a narrow aperture. The large aperture allows flood illumination and expands imaging field. A moveable imaging camera can focus on different layers of the retina. In the confirming experiment a subject who was a 25-years-old normal health Chinese male was imaged. We got clear images of photoreceptor layer blood vessels and nerve fiber layer. 2011 IEEE.

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：35/0 | 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.

Test of an off-axis asphere by subaperture stitching interferometry (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Zheng L.-G.; Zhang X.-J.; Zhang Z.-Y.; Zhang Z.-Y.; Deng W.-J.

收藏 | 浏览/下载：58/0 | 提交时间：2013/03/25

A new method combined subaperture stitching with interferometry(SSI) is introduced. It can test large and off-axis aspheric surfaces without the aid of other null optics. In this paper the basic principle and theory of the technique are analyzed. The synthetical optimization stitching model and effective stitching algorithm are established based on homogeneous coordinates transformation and simultaneous least-squares method. The software of SSI is devised and the prototype for testing of large aspheres by SSI is designed and developed. An off-axis asphere with the aperture of 376mm188mm is tested by this method. For comparison and validation and the difference of PV and RMS error between them is 0.047 e and 0.006 e the asphere is also tested by null compensation.The synthesized surface profile is consistent to that ofthe entire surface from null test respectively. So it provides another quantitative measurement for testing large aspheric surfaces and off-axis aspheres besides null-compensation. 2009 SPIE.

Annular sub-aperture stitching interferometry for testing of large asphreical surfaces (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China
作者: Zheng L.-G.; Zhang X.-J.; Deng W.-J.; Wang X.-K.

收藏 | 浏览/下载：80/0 | 提交时间：2013/03/25

Annular subaperture stitching interferometric technology can test large-aperture and the PV and RMS of residual error of the full aperture phase distribution is 0.027 and 0.0023 high numerical aperture aspheric surfaces with high resolution the relative error of PV and RMS is -0.53% and -0.31% respectively. The results conclude that this splicing model and algorithm are accurate and feasible. So it provides another quantitive measurement for test aspheric surfaces especially for large aperture aspheres besides null-compensation. low cost and high efficiency without auxiliary null optics. In this paper the basic principle and theory of the stitching method are introduced the reasonable mathematical model and effective splicing algorithm are established based on simultaneous least-squares method and Zernike polynomial fitting. The translation errors are eliminated from each subaperture through the synthetical optimization stitching mode it keeps the error from transmitting and accumulating. The numerical simulations have been carried on by this method. As results the surface map of the full aperture after stitching is consistent to the input surface map the difference of PV error and RMS error between them is -0.0074 and -0.00052 ( is 632.8nm) respectively

The ELT situation in China 会议论文 OAI收割
Retirement Symposium for Arne Ardeberg on Extremely Large Telescopes - Which Wavelengths, Lund, SWEDEN, 2007-11-29
作者: Liu Z(刘忠); Cui, XQ; Liu Z(刘忠)

收藏 | 浏览/下载：14/0 | 提交时间：2016/04/06

Extremely Large Telescope ground based segment ring aperture Interferometric Telescope active optics adaptive optics spherical mirror site survey Dome A

Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Large-aperture telescope can be used in surveying battlefield researching landform searching object real-time monitoring imaging detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object quantity geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology people require larger aperture in optics-electronic (OE) system. By increasing optical aperture the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors such as deadweight deformation of heat environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror precision of the system is ensured. During the designing phase one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply which was operated by the Directed Energy Directorate of the Air Force Research Laboratory Kirtland AFB NM USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.