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长春光学精密机械与物... [5]
自动化研究所 [1]
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摄像机一维标定的加权线性算法研究
学位论文
OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者:
史坤峰
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提交时间:2015/09/02
摄像机标定
一维物体
加权线性算法
一阶误差分析
Camera calibration
1D objects
weighted linear algorithm
first-order error analysis
Structural design of large aperture rectangular mirror for space telescope (EI CONFERENCE)
会议论文
OAI收割
2nd International Conference on Civil Engineering and Transportation, ICCET 2012, October 27, 2012 - October 28, 2012, Guilin, China
作者:
Li Z.
;
Li Z.
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提交时间:2013/03/25
Structural design of large aperture mirror is one of the key technologies for space telescope development. To meet the requirements of high stiffness
strength and thermal dimensional stability
some factors such as support scheme
materials selection
lightweight design and flexible support design were taken into account. The three supports location of the mirror was determined according to the modal analytical solution. By adjusting the parameters of flexure hinge
influences of gravity
assembly stress and thermal stress on the mirror were reduced obviously. Finite element analysis (FEA) results indicate that the surface accuracy reach to rms10.2nm and 10.8nm under the gravity along optical axis direction and 5C uniform temperature rise respectively
the fundamental frequency of the mirror component is 268Hz. Dynamics test shows that the first order natural frequency is 256Hz
which shows an error less than 5% compared to FEA results. (2013) Trans Tech Publications
Switzerland.
Application of trend extrapolation method to spectrum analysis of microtremor signal (EI CONFERENCE)
会议论文
OAI收割
2nd World Congress on Computer Science and Information Engineering, CSIE 2011, June 17, 2011 - June 19, 2011, Changchun, China
Zhou X.
;
Guo T.
;
Jiao J.
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浏览/下载:30/0
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提交时间:2013/03/25
The trend extrapolation method is applied to spectrum analysis of microtremor signal in order to increase the spectral estimation accuracy. First
establish an appropriate extrapolation model based on the existing data series
and then fit correlation functions other than existing data by derivative least squares method
finally perform spectrum analysis using extrapolated correlation functions. Numerical simulations and the experimental results show that good results are achieved no matter correlation functions change slow or rapid
and the extrapolation error is not more than 2.3%. 2012 Springer-Verlag Berlin Heidelberg.
The effect of backlash nonlinear on resonance frequency of electric actuator transmission system (EI CONFERENCE)
会议论文
OAI收割
3rd IEEE International Conference on Advanced Computer Control, ICACC 2011, January 18, 2011 - January 20, 2011, Harbin, China
Han X.
;
Ge M.
;
Bai Y.
;
Jia H.
;
Ge W.
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提交时间:2013/03/25
In order to study the effect of backlash nonlinear on resonance frequency of electric actuator transmission system
then
Finally
in the premise of meeting the stability
the dynamic equilibrium equation of transmission system with backlash is established
it makes dynamic simulation analysis for the transmission system based on virtual prototype technology
it establishes balanced equation of dynamics system with backlash
the effect of backlash on system natural frequency and resonance frequency
and the theoretical values and simulation values are compared. Theoretical analysis and simulation results show that the theoretical analysis is basically consistent with simulation results when it is zero backlash
and does some theory research and dynamic analysis of backlash nonlinearity and system natural frequency and resonance frequency. First
and the error of theoretical analysis and simulation results is within 10%. Therefore
according to describing function to theoretically model the backlash nonlinear
it can be concluded that considering the transmission system theoretical analysis of backlash nonlinearity is feasible
the relation between describing function and the amount of backlash and input amplitude is analyzed
and it is much closer to the actual system with instructive significance. 2011 IEEE.
Analysis of measuring errors for the visible light phase-shifting point diffraction interferometer (EI CONFERENCE)
会议论文
OAI收割
2010 OSA-IEEE-COS Advances in Optoelectronics and Micro/Nano-Optics, AOM 2010, December 3, 2010 - December 6, 2010, Guangzhou, China
作者:
Zhang Y.
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提交时间:2013/03/25
In order to improve the measuring accuracy of the visible light phase-shifting point diffraction interferometer (PS/PDI) for the extreme ultraviolet lithography (EUVL) aspheric mirrors
the main measuring errors will be discussed in this paper. At first
the elementary configuration and measuring principle of the visible light phase-shifting point diffraction interferometer are introduced briefly
then the different errors which are possible to affect the measuring result are summed up
the errors include PZT phase-shifting error
detector nonlinearity error
detector quantization error
wavelength instability error and intensity instability error of the laser source
vibration error
air refractivity instability error and so on. Through detailed analysis and simulation
the magnitude of these errors can be obtained. By analysing the reasons which cause these errors and the relationship between these errors and interferometer configuration parameters
some methods are put forward to avoid or restrain these errors accordingly.
Resolution performance of extreme ultraviolet telescope (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:
Yang L.
;
Chen B.
;
Chen B.
;
Liang J.-Q.
;
Ni Q.-L.
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浏览/下载:30/0
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提交时间:2013/03/25
Extreme Ultraviolet Telescope (EUT) will image solar corona in four EUV narrow bandpasses defined by multilayered coatings deposited on normal incidence optics. In order to make sure it will get sub-arcsecond angular resolution in the mission we have to test its resolution performance on ground. The EUT is aligned by Zygo interferometer first and a global wavefront error of 0.152 peak to valley is obtained ( = 632.8nm ). Because of the difficulty of angular resolution test for EUT at its operating wavelengths
we test its optical performance at visible and UV band. The method is to place the resolution test-target on the focal plane of collimator and illuminate the target by visible and UV light espectively
then the collimated light will go through EUT and image at focal plane on CCD. By analysis of the images obtained in experiments we conclude that the angular resolution of EUT is 1.22 at visible light ( = 570nm ) which is very close to diffraction limit (1.20) and according to these results we estimate that the operational wavelength resolution is better than 0.32
meets design requirements. While for UV light
the angular resolution is 1.53 that is different from diffraction limit (0.53)
the error comes mainly from large pixel of EUV camera. 2009 SPIE.