中国科学院机构知识库网格系统: 检索

Study on the dimensional metrology and alignment method for the 1/32 CFETR VV mock-up 期刊论文 OAI收割
FUSION ENGINEERING AND DESIGN, 2020, 卷号: 155
作者: Gu, Yongqi; Liu, Chen; Wei, Jing; Lu, Kun; Ji, Haibiao

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收藏 | 浏览/下载：28/0 | 提交时间：2020/11/26

CFETR VV Inspection of the complex spatial surface Assembly alignment Best-fit Reverse modeling Machining alignment

Reflector surface alignment based on antenna gain measurements under perturbations 期刊论文 OAI收割
JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS, 2019, 卷号: 5, 期号: 2, 页码: 11
作者: Lou, Zheng; Zuo, Yingxi; Zhang, Xiaoling; Kang, Haoran; Qian, Yuan

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收藏 | 浏览/下载：59/0 | 提交时间：2019/10/21

radio telescopes reflector antenna surface measurement surface alignment radio holography

Modified band alignment at multilayer MoS2/Al2O3 heterojunctions by nitridation treatment 期刊论文 OAI收割
Journal of Alloys and Compounds, 2019, 卷号: 793, 页码: 599-603
作者: X.K.Liu; K.L.Li; X.J.Sun; Z.M.Shi; Z.H.Huang

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收藏 | 浏览/下载：45/0 | 提交时间：2020/08/24

Multilayer MoS2,Al2O3 surface,NH3 treatment,Band alignment,field-effect transistor,layer mos2,Chemistry,Materials Science,Metallurgy & Metallurgical Engineering

Surface Textures Fabricated by Laser Surface Texturing and Diamond Cutting - Influence of Texture Depth on Friction and Wear 期刊论文 OAI收割
Advanced Engineering Materials, 2018, 卷号: 20, 期号: 4, 页码: 8
作者: Zhang, J. J.; Zhang, J. G.; Rosenkranz, A.; Zhao, X. L.; Song, Y. L.

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收藏 | 浏览/下载：32/0 | 提交时间：2019/09/17

damond cutting friction reduction laser texturing surface texturing texture depth tribological behavior steel reduction microstructures vibration optimization performance alignment Materials Science

Design and Fabrication of CGH for 600mm diameter SiC primary mirror surface figure testing 会议论文 OAI收割
8th international symposium on advanced optical manufacturing and testing technology (aomatt) - optical test, measurement technology, and equipment, suzhou, peoples r china, 2016-04-26
作者: Pang Zhihai; Ma Zhen; Fan Xuewu; Zou Gangyi

收藏 | 浏览/下载：30/0 | 提交时间：2016/12/02

Computer-generated hologram Aspheric surface Optical testing Alignment

Total Routhian surface calculations of triaxial or gamma-soft properties in even-A N=76 isotones with 54 <= Z <= 68 期刊论文 OAI收割
CHINESE PHYSICS C, 2015, 卷号: 39, 页码: 7
作者: Chai Qing-Zhen; Yang Qiong; Liu Min-Liang; Wang Hua-Lei

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收藏 | 浏览/下载：62/0 | 提交时间：2018/05/31

total Routhian surface calculation triaxial deformation gamma-instability rotation alignment

The optical design of cubic phase plate testing system (EI CONFERENCE) 会议论文 OAI收割
2011 Symposium on Photonics and Optoelectronics, SOPO 2011, May 16, 2011 - May 18, 2011, Wuhan, China
作者: Zhang X.; Zhang X.; Zhang X.; Zhang Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

Computer-generated holograms (CGH) have been widely used for years in optical testing of aspheric surfaces in combination with Fizeau interferometers. With the development of diffraction optics computer technology and micro-processing technology the accuracy of the CGH testing can achieve a hundredth of a wave and the cost is reduced greatly. CGH is capable of producing an optical wavefront with any desired shape. So it is fascinating and will have good prospects to test free-form surfaces using CGH. As the CGH can create any wavefront shape it can also be used in unsymmetrical aspherical surfaces testing. Taking the cubic surface as an example this paper gives a method to test unsymmetrical surfaces. This paper gives the design to test a cubic surface. And the separation of the diffraction orders and the binary process of the continuous CGH phase function are discussed in detail. The alignment tolerance of the test system and the CGH fabrication tolerance are analyzed. We also present an idea using a CGH and two spherical lenses as null lens to test the cubic surface when the surface deviation is great. 2011 IEEE.

Design and fabrication of CGH for aspheric surface testing and its experimental comparison with null lens (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhao J.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Computer-generated hologram (CGH) is an effective way to compensate wavefront in null test of aspheric surfaces and freeform surfaces. Our strategies of CGH design and fabrication for optical testing are presented and an experiment demonstrating the compensation results of CGH and null lens is also reported. In order to design complex CGH software was developed with which we can design a CGH including three sections: main section for compensating wavefront in null test alignment section for adjusting the relative position between CGH and interferometer and fiducial section for projecting fiducial marks around the optics under test. The design result is represented in GDS II format file which could drive a laser-direct-writer- machine to fabricate a photomask. Then a 1:1 replication process is applied to duplicate the patterns from photomask to a parallel optical substrate whose surface is error better than /60 rms. Finally an off-axis aspheric surface was tested with CGH and null lens respectively. The test result with CGH (0.019rms) is almost the same as the result with null lens (0.020 rms). This experiment also demonstrated that fiducial marks projected by CGH can be used to guide the alignment of the optics and measurement of its off-axis distance. 2010 Copyright SPIE - The International Society for Optical Engineering.

Alignment of off-axis asphere and compensator with four poles (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: Li J.; Chen Y.; Li J.; Li J.; Wang P.

收藏 | 浏览/下载：58/0 | 提交时间：2013/03/25

Aspheres are utilized widely thanks to the development of optical design manufacture and testing. Compensators are usually necessary when aspheres are under test. The alignment of aspheres and their compensators is a risk because it's tough to check whether the compensators work in right way. A new method of alignment with four poles is put forward in this paper. Optical interval error can be tight while it is quite important due to direct influence on central curvature conic constant and high order coefficients of aspherical surface. A modified on-axis Foucault apparatus is set up since it makes the optical axis visible and helps to control the error of off-axis amount. Some small holes are drilled in the metallic cell of the compensator so that the ends of poles can be stably relied on in order to increase operational repeatability. The method has been carried out practically and it matches the measurement result given by a set of theodolites. 2009 SPIE.

Design of dual-FOV refractive/diffractive LWIR optical system (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Wang L.-J.; Zhang J.-P.; Wang L.-J.; Zhang X.; Zhang X.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

An infrared-optical zoom system using binary element is proposed in this paper. The two main advantages of the zoom system introducing here are: bigger F-number and lower cost. The primary optical properties are: F/#=1 Second Others zoom ratio =1:4 binary element is used to correct the chromatical aberration by taking the advantage of negative dispersion characteristics and the cost of the system is lower than that of conventional ones with Zinc Selenide (Znse) material at the same level. In the binary element is rotational symmetric with one step which is easy to fabricate in order to balance 5th spherical aberration and dual field are 26.6 and 5.6respectively. Wider field of view is used for search and the smaller one is used for imaging details. This system uses un-cooled infrared detector with 320240 pixels and 45m pixel size. The F-number matches the sensitivity range of the detector array. Three aspects are considered during design process to make the system more satisfactory and more achievable. First 5th coma aberration and 5th astigmatic aberration the manner of zoom is accomplished by exchanging tow lenses into the smaller field of view system layout. The lens exchange manner faces the requirement of simple system structure and good image quality in both focal points. It can also make the system more feasible in the alignment process than mechanical-zooming manner and optical-zooming manner high-order asphere surfaces with 2th order to 10 th order are also hired in the system. Asphere surface is useful in compressing the system and improving optical system transmittance. This kind asphere surface is on industrial level featuring low cost and easy to fabricate. It is shown that good image quality can achieved by implementing five Germanium lenses and the transmittance of system is 72%. All aberrations are diffraction-limited both spherical aberration and astigmatic aberration are corrected. When the field of view(FOV) is 26.6 and the focal length is 152mm MTF at Nyquist frequency(11lp/mm) is great than 0.7. The spherical aberration is -0.0073. The coma aberration is 0.0978 and the astigmatic aberration is -0.013. When the field of view(FOV) is 5.6 and the focal length is 38mm MTF at Nyquist frequency is great than 0.8 with spherical aberration -0.0046 the coma aberration 0.055 and astigmatic aberration 0.034.