中国科学院机构知识库网格系统: 检索

A method of laser focusing control in micro-laser-induced breakdown spectroscopy 期刊论文 OAI收割
PLASMA SCIENCE & TECHNOLOGY, 2019, 卷号: 21, 期号: 3, 页码: 1-9
作者: Sun LX(孙兰香); Wang W(汪为); Dong W(董伟); Qi LF(齐立峰); Zheng, LM(郑黎明)

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收藏 | 浏览/下载：55/0 | 提交时间：2018/12/16

LIBS microanalysis ablation crater focusing control

Controlled Synthesis of Au-36(SR)(24) (SR = SPh, SC6H4CH3, SCH(CH3)Ph, and SC10H7) Nanoclusters 期刊论文 OAI收割
ACTA PHYSICO-CHIMICA SINICA, 2018, 卷号: 34, 期号: 7, 页码: 786-791
作者: Li Zhimin; Li Gao; Zhou Yang; Zheng Kai

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收藏 | 浏览/下载：30/0 | 提交时间：2019/06/20

Gold Cluster Au-36(Sr)(24) Control Synthesis Size-focusing Ligand Effect

The analyze and design of focusing system for space camera (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Electrical Insulating Materials and Electrical Engineering, EIMEE 2012, May 25, 2012 - May 27, 2012, Shenyang, Liaoning, China
作者: Yu T.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

In order to control the focal plane and guarantee the imaging quality of space camera the focusing system was proposed. Firstly the reasons of defocusing were analyzed and a solution method was given. Secondly the system structure and operating principle were introduced. Thirdly the system design was presented in detail. Finally the system was experimented. Experimental results indicate that the defocusing amount of camera can be controlled below 10 um and the focusing system satisfies the requirement of system design. (2012) Trans Tech Publications Switzerland.

Design and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者: Chen W.; Gao X.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera based on the experience gained from the development of a remote sensing camera working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.

Research of new wireless sensor network protocol: ZigBee RF4CE (EI CONFERENCE) 会议论文 OAI收割
International Conference on Electrical and Control Engineering, ICECE 2010, June 26, 2010 - June 28, 2010, Wuhan, China
作者: Xu Z.-J.; Li D.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

Currently most existing remote controls for consumer electronics use infrared remotes (IR) technology to control devices which Increases the demand for advanced functionality that cannot be supported by existing IR. RF remotes provide new levels of interactivity and convenience for today's digital home when compared to IR remotes. New network protocols: ZigBee RF4CE are helping to make this technology accessible to us. In this paper we first introduce the architecture and primitives of the ZigBee RF4CE node initialization service then present the researches of the Application layer and Network layer respectively. Focusing on the functions of Network layer including: frequency usage service transmission control service discovery service power saving service pairing service and security service. 2010 IEEE.

Focusing control system of photoelectric theodolite based on CAN bus (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Computer Engineering and Technology, ICCET 2010, April 16, 2010 - April 18, 2010, Chengdu, China
Mi Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

The development trend of focusing control system is high speed reliable control and miniaturization. A new autofocusing control system based on CAN bus is designed which realizes the real-time communication and synchronization control among the distributed control system. A design process of CAN interface based on TJAI050 is presented. The principle of focusing control and the hardware and software design are presented in detail. All experiments show that the control system has the advantages such as high accuracy and anti-interference ability and meets the requirements of high speed and good stability. 2010 IEEE.

Application of precision harmonic gear drive in focusing mechanism of space camera (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio high precision compact structure high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera the location relationship between the displacement of focusing structure and the focal plane movement is derived and the system error is analyzed its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70 repeated positional accuracy is 2m which meet the requirements for use. 2010 SPIE.

Model identification and closed-loop confirmation for opto-electronic platform of seeker (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China
作者: Liu H.; Zhang J.; Zhang J.; Zhang J.; Chen J.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

A mathematical model of seeker opto-electronic platform is the basis for researching performance designing a servo control system and simulating. Focusing on high frequencies of mechanical resonant restriction of gimbaled axis rotation a new model identification method was proposed under the pseudo-random invert-M-sequences. The testing signal data acquisition the calculating of frequency response and least square identification were investigated. The realized steps are explicitly illustrated and the testing example is given in this paper the results confirm that the proposed method is effective and practical. 2010 IEEE.

Key techniques of laser direct writing patterns on spherical substrate (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Zhao J.-L.; Feng X.-G.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

Comparing with the writing method of plane pattern spherical pattern' has some remarkable different on several points. Firstly it is difficult to spin-coated a uniform photoresist film on a spherical substrate especially the ratio of spherical radius to caliber is smaller and the spin-coated way must match the ratio of spherical radius to caliber. Secondly if the sphere couldn't be regarded as a plane a so-called concentric optical scan movement way must be applied for the generation of spherical pattern because the reflex of substrate will affect the quantity of illumination. Commonly an alignment technique is indispensable with pattern generation of spherical surface by the concentric optical scan in order to ensure the orthogonal intersection of focusing laser beam and writing surface. Thirdly a uniform velocity control must be considered for the laser direct writing method on a spherical substrate. Otherwise the exposure time of photoresist will be different and the line widths of pattern will be also different at different areas. Fourthly commonly because the errors of concentric machine and substrate surface shape are bigger so focusing servo-control technique is also needful for writing a pattern on a spherical substrate. Focusing servo-control may keep the focal spot on the spherical surface by a focus detection and control system in the course of writing pattern. Using these techniques we fabricated a line width of 7m and a period of 600m isometric mesh on the concave of a spherical substrate.

Design of infrared afocal zoom system (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China
作者: Wang Y.; Jiang H.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：96/0 | 提交时间：2013/03/25

The design method and result are described for an infrared afocal zoom system. Its zoom ratio is 4 (2) Functions such as changing the field-of-view and the corresponding field of view is 3-12. The working waveband is from 7.5m to 10.5m focusing for objects at finite distances and athermalizing the system can be achieved by axially moving a single element in the system. and its total length is required to be no more than 350mm. The final optical system consists of 7 elements with aspheric surfaces and a diffractive optical element. It achieves diffraction-limited imaging at the far infrared waveband. Two conclusions can be drawn from the design. (1) Using diffractive optical elements in the design of an infrared optical system is an effective approach to control color aberrations which eliminates the need to use exotic and expensive materials and helps to reduce the cost of the system