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	Absolute interferometric testing of an ultra-precise flat substrate with a liquid mirror 会议论文 OAI收割 Prague, Czech republic, April 3, 2019 - April 4, 2019 作者: Quan, Haiyang; Hou, Xi; Wu, Gaofeng; Hu, Xiaochuan \| 收藏 \| 浏览/下载：13/0 \| 提交时间：2021/05/06 interferometry absolute test x-ray mirror flatness
	A digital wide range neutron flux measuring system for HL-2A 期刊论文 OAI收割 PLASMA SCIENCE & TECHNOLOGY, 2017, 卷号: 19, 期号: 8 作者: Yuan Chen; Wu Jun; Yin Zejie \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2021/12/13 FUSION TEST REACTOR ABSOLUTE CALIBRATION MONITORING-SYSTEM TOKAMAK ITER SPECTROSCOPY YIELDS TFTR EAST HL-2A plasma diagnosis neutron flux measurement signal collection and treatment
	Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏 \| 浏览/下载：47/0 \| 提交时间：2013/03/25 With the development of aerospace remote sensing technology the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera the compensation method of image motion to space camera is researched. First the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second the system adopts 80C31 as controller of drift angle and adopts stepping motor for actuators and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced and it achieve the closed-loop control of the drift angle position. At the last this paper analyses the transmission precision of the mechanism. Through the experiment we measured the actual precision of the image motion compensation mechanism and compared with the theoretical analysis. There are two major contributions in this paper. First the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism it will bring adverse effects for the precision and stiffness of mechanism. For this problem This paper designed a image motion compensation that have some advantages such as small size light weight at the same time high precision stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second the traditional mechanism control need to corrected fitting and iterative for the control formula of mechanism. Only in this way we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5 -4 -3 -2 -1 0 +1 +2 +3 +4 +4 as the expectation value of the imaginary drift angle we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3' and it can achieve the high-precision image motion compensation. 2011 SPIE.
	The study of encoding principle and encoding disc design of a new-style vernier absolute encoder (EI CONFERENCE) 会议论文 OAI收割 2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China 作者: Li L. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 To satisfy the requirement of encoder miniaturization high dependability and high measuring accuracy a new-style vernier absolute type encoder which offered significant advantages over less reticling circles and high precision was presented in the paper which carried out the design of vernier encoding disc the analysis of new-style vernier encoding principle and exact encoding track calibration by studying the photoelectric encoder. The Matlab simulation results prove that the encoding and coding methods are feasible. The test showed that the cubage of encoder was quite small and the diameter of the encoder can be controlled within 100mm its resolution can reach 24 bits i.e. 0.0772. The feasibility of encoding and coding method was further proved. 2011 IEEE.
	The design of composite optical encoder (EI CONFERENCE) 会议论文 OAI收割 9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China Liang L.; Wan Q.; Qi L.; He J.; Du Y.; Lu X. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 In order to improve minimize volume lighten the weight of Measurement and Control Equipment ??the design of a composite optical encoder is put forward in this paper. The composite encoder can achieve the angle measurement as the absolute encoder and the servocontrol as the increment encoder. Base on the requirement of the Measurement and Control Equipment the Composite code disc and the slot is designed then the precision test is implemented on the composite optical encoder. The experimental result shows that the composite optical encoder not only output the measurement of the angle but also provides speed feedback control signal. It has advantages of small volume light weight which can meet the requirements of Measurement and Control Equipment. 2009 IEEE.
	Vicarious calibration of MODIS visible and near-infrared bands using Gongger test site 会议论文 OAI收割 Igarss: 2007 Ieee International Geoscience and Remote Sensing Symposium, Vols 1-12: Sensing and Understanding Our Planet, New York Gong, Hui; Tian, Guoliang; Zhang, Yuxiang; Yu, Tao; Gu, Xingfa; Xing, Jin; Liang, Hongyou; Zhu, Li 收藏 \| 浏览/下载：14/0 \| 提交时间：2014/12/07 absolute calibration reflectance-based method MODIS visible and near infrared band Gongger test site the TOA radiance and apparent reflectance
	Developing of in-suit long trance profiler for testing slope error of aspherical optical Elements (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China Zhou C.; Li H.; Chen C.; Zhou C.; Qian S. 收藏 \| 浏览/下载：35/0 \| 提交时间：2013/03/25 Profile error of super smooth surface of optical elements at X-ray/EUV in synchrotron radiation (SR) light beam line is described as slope error of them generally. The Long Trace Profiler (LPT) is used for testing surface slope error of SR optical elements in world generally. It is requisite to use In-suit LTP measuring surface thermal distortion of SR optical elements with high heat under high bright SR source. Authors design an In-suit LTP by means of co-path interferometer with pencil light beam. The instrument not only can be used for testing slope error of mirrors in Lab. also in situation test the distortion of mirror with high heat load at synchrotron light beam line. The device can be used to test various absolute surface figures of optical elements such as aspherieal spherical and plane. It is needless standard reference surface. It is named by LTP-III. This paper describes its basic operating principle optical system mechanical constructions DC serve motor control system array detector data acquisition system and computer system for controlling and data analysis of LTP-III. The Instrument has advantages of high accuracy low cost multifunction and wide application. Length of surface measured of optical element accuracy is 0.04 arcsec.
	非球面光学元件绝对面形检测技术研究学位论文 OAI收割作者: 马啸 \| 收藏 \| 浏览/下载：35/0 \| 提交时间：2018/12/26 非球面光学元件 aspheric optics 液晶空间光调制器 liquid crystal spatial light modulator 物理光学传播 physical optics propagation 波面优化 wavefront optimization 绝对检测 absolute test