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	Ca-40(+) optical frequency standards with high accuracy 期刊论文 OAI收割 ACTA PHYSICA SINICA, 2018, 卷号: 67, 期号: 16, 页码: 10 作者: Guan Hua; Huang Yao; Li Cheng-Bin; Gao Ke-Lin \| 收藏 \| 浏览/下载：51/0 \| 提交时间：2018/11/05 optical frequency standards precision measurements Ca-40(+) ion magic wavelengths
	SONG-China Project High Resolution Spectrograph and High Precision Radial Velocity Measurements of Asteroseismology 期刊论文 OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 卷号: 38, 期号: 2, 页码: 621-626 作者: Yan Zheng-zhou; Deng Li-cai; Zhang Chun-guang; Luo Chang-qing; Grundahl, F. \| 收藏 \| 浏览/下载：40/0 \| 提交时间：2020/03/11 High resolution spectrograph High precision radial velocity measurements
	Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China 作者: Sun Z. 收藏 \| 浏览/下载：28/0 \| 提交时间：2013/03/25 A comparison study on temperature measurement precision between middlewave 3-5m and longwave 8-12m measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K900K. First the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity limited transmittance of the atmosphere radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do. 2012 IEEE.
	3R intersection target positioning in real time based on distance (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Nengwei W.; Juan C.; Jian C. 收藏 \| 浏览/下载：13/0 \| 提交时间：2013/03/25 The positioning error based on angle angle-distance or single station positioning increases with the distance increasing. 3R target positioning based on distance can obtain the high precision measurements in long distance. Here we give the 3R model for the intersection positioning provide the two necessary conditions for getting the optimum intersection point. The experimental results show that the intersection precision based on angle is over 2m and will degrade greatly with the increasing of distance while the one based on 3R model will improve and the error decrease gradually. That the precision of the distance measurement is about 1m means the 3R model is better than the angle positioning which can compensate the drawbacks of the angle positioning at short distance. 2010 IEEE.
	Double-swing method used for polishing off-axis aspherical mirrors (EI CONFERENCE) 会议论文 OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者: Chen Y.; Song S.-M.; Xuan B.; Wang P.; Li J.-F. 收藏 \| 浏览/下载：45/0 \| 提交时间：2013/03/25 Based on the characteristics of off-axis aspherical surface the comparison of simulation effects under different parameters is made. In order to achieve optimal parameters a new method used for polishing off-axis aspherical mirrors-Double-Swing Method (DSM) is proposed in this paper a high order off-axis rectangle aspherical mirror has been polished by DSM. The final result of profile measurements of 12nm and the polishing mechanism of DSM is introduced. The mathematical model of the DSM with steady movement state is established.The movement of this mathematical model is simulated in a programming language RMS is achieved. The result indicates that the method is of practice and has even higher working efficiency and precision. 2009 SPIE.