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长春光学精密机械与... [95]
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会议论文 [95]
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内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Phase retrieval using regularization method in intensity correlation imaging
会议论文
OAI收割
International Symposium on Optoelectronic Technology and Application 2014: Imaging Spectroscopy; and Telescopes and Large Optics, IPTA 2014, May 13, 2014 - May 15, 2014, Beijing, China
作者:
Wang B.
;
Wang J.
;
Gao X.
;
Wang B.
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  |  
浏览/下载:10/0
  |  
提交时间:2015/04/27
Design of optical electronic watch system based on multi-sensor
会议论文
OAI收割
3rd International Conference on Advanced Engineering Materials and Technology, AEMT 2013, May 11, 2013 - May 12, 2013, Zhangjiajie, China
Wu C.
;
Lu J. F.
;
He B. G.
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  |  
浏览/下载:19/0
  |  
提交时间:2014/05/15
A new algorithm for solving the best-fit sphere of optical aspherical surface (EI CONFERENCE)
会议论文
OAI收割
2nd International Conference on Advances in Materials and Manufacturing, ICAMMP 2011, December 16, 2011 - December 18, 2011, Guilin, China
作者:
Lin J.
;
Lu M.
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  |  
浏览/下载:30/0
  |  
提交时间:2013/03/25
To solve the best-fit sphere (BFS) accurately is one of the technological keys for the generating and testing of optical aspherical surfaces. This paper presents a new algorithm for solving the BFS of aspherical surfaces to suppress some deficiencies in the existing BFS algorithms. In the proposed approach
it is not only suitable for the conic surface
a BFS is constructed
but also for higher order aspheres. The obtained asphericity and material removal function is more suitable for the machining and test. (2012) Trans Tech Publications
which passes through both sides of endpoints in the section o -?xy of the aspherical surfaces
Switzerland.
the center of the BFS is shifted along the x-axis
and its radius of curvature is automatically computed. The variable step size method is proposed to speed up the convergence of the iteration. Through numerically solving the BFS of conic and cubic surface
the advantages of the proposed approach are verified. The results show that the proposed approach is of rapid convergence
and high accuracy
Synthesis and luminescence properties of Eu3+-doped silicate nanomaterial (EI CONFERENCE)
会议论文
OAI收割
17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states
作者:
Zhang J.
;
Zhang J.
;
Zhang J.
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  |  
浏览/下载:23/0
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提交时间:2013/03/25
In this paper
we introduce a sol-gel process for preparing Y 2Si2O7: Eu3+ nanocrystals. The rare earth compounds were dispersed in the SiO2 colloids and the monodisperse nano-scale composite materials were prepared. The reactant mass fraction and heat treatment temperatures could affect the structures and emission spectrum properties of as-synthesized samples. The samples emit the strong red light upon excitation under the ultraviolet. The main peaks originate from 5D0-7F2 electric dipole transition of Eu3+. With regard to the samples treated at different temperatures
the emission spectra obtained under 266 nm excitation show different shapes of spectra lines and relative intensities
indicating that the Eu3+ ions have been located in different local environments. 2011 Published by Elsevier B.V.
Energy Transition between Yb(3+)-Tm(3+)-Gd(3+) in Gd(3+), Yb(3+) and Tm(3+) Co-doped Fluoride Nanocrystals
会议论文
OAI收割
2011
Zhang J. S.
;
Cao C. Y.
;
Lu S. Z.
;
Qin W. P.
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  |  
浏览/下载:19/0
  |  
提交时间:2013/03/28
Energy transition between Yb3+-Tm3+-Gd3+ in Gd3+, Yb3+ and Tm3+ Co-doped fluoride nanocrystals (EI CONFERENCE)
会议论文
OAI收割
17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states
作者:
Zhang J.
;
Zhang J.
;
Zhang J.
收藏
  |  
浏览/下载:15/0
  |  
提交时间:2013/03/25
YF3: 20%Gd3+
20%Yb3+
0.5%Tm3+ nanocrystal has been synthesized by a hydrothermal method. The upconversion (UC) emission and energy transfer progresses between Gd3+-Yb 3+-Tm3+ under a 980-nm continuous wave semiconductor laser diode excitation have been explored. The experimental results show that the violet and ultraviolet (UV) enhancement with Tm3+ upconversion emission occurs in the nanocrystal
and in the same time the UC emissions of Gd3+ from 6D9/2
6IJ
6P5/2
and 6P7/2 states to the ground state 8S7/2 are obtained
too. The dynamic analysis implies that
under 980-nm excitation
the nanocrystal dimension plays a key role in the efficient energy transfer processes between Gd3+-Yb 3+-Tm3tt based on the energy matching conditions. 2011 Published by Elsevier B.V.
Synthesis and Luminescence Properties of Eu(3+)-doped Silicate Nanomaterial
会议论文
OAI收割
2011
Lu S. Z.
;
Zhang J. H.
;
Zhang J. S.
收藏
  |  
浏览/下载:6/0
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提交时间:2013/03/28
A new accurate and fast algorithm of sub-pixel image registration (EI CONFERENCE)
会议论文
OAI收割
2010 IEEE 10th International Conference on Signal Processing, ICSP2010, October 24, 2010 - October 28, 2010, Beijing, China
作者:
He B.
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  |  
浏览/下载:15/0
  |  
提交时间:2013/03/25
In terms of large field view and multi-channel TDICCD remote sensing images
previous interpolation methods and curve fitting methods are not able to achieve the high accuracy and fast registration
and their noise immunity and robustness is not high. For that
this paper presents a more accurate and faster method
iterative pixel interpolation and surface fitting method. Firstly
the method uses the some overlapping pixels between multi-channel images. Secondly
the proposed technique
which is based on the maximization of the correlation coefficient function
combines an efficient pixel-moving interpolation scheme with surface fitting
which makes use of accurate interpolation calculation and fast surface fitting in the iterative process. Finally
the accuracy and speed of the algorithm is evaluated by sub-pixel registration of multi-channel images and comparison with other sorts of efficient methods. The experiment results show that the accuracy of the method reaches 0.01 pixels and it is 3 times faster than the interpolation method. In the registration of large field view and multi-channel TDICCD images
the method is accurate and fast
with greatly high stability
noise immunity and robustness. 2010 IEEE.
Research on the laboratory radiometric calibration of the thermal imager (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:
Wang J.
;
Liu Y.
;
Liu Y.
;
Liu Y.
;
Sun Q.
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  |  
浏览/下载:17/0
  |  
提交时间:2013/03/25
The radiometric calibration of the thermal imager was investigated to build the relationship between the input radiance and the digital output to realize the temperature measurement. The radiometric calibration was implemented in the State Key Laboratory of Applied Optics. A standard black body source was served as radiation source. The response of the thermal imager to the input radiance was tested for different gains. The experimental results show that the average grey level of the output imaging is linear dependence of the input radiance. Because the radiance in the receiving wave range of the thermal imager is linear with the black body's temperature based on Planck's law of radiation
the average grey level of the output image is also linear with the black body's temperature after fitting a curve to the experiment data points. Then the relationship of the response and the gain was studied when the black body's temperature kept constant. The preliminary analysis of calibration data shows that the response of the thermal imager is linear and the average grey value of the image is directly proportion to the gain. According to the experimental results
the reference gains and the dynamic range of temperature measurement were obtained. Finally
the uncertainty influencing the calibration results was analyzed
the analysis shows the maximal uncertainty is 5.2%
which can meet the calibration requirement less than 10%. 2010 Copyright SPIE - The International Society for Optical Engineering.
A new research of sub-pixel level accuracy of TDICCD remote sensing image registration (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
作者:
He B.
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  |  
浏览/下载:19/0
  |  
提交时间:2013/03/25
In the field of remote sensing imaging
TDICCD remote sensing images have a lot of their own characteristics
such as high-resolution
large amount of information
less overlapping parts of pixels
additional image blurring etc. Therefore
there exist many difficulties
especially in terms of high-accuracy registration of pairs of images. For that
this paper presents two new pixel interpolation method for sub-pixel level registering images that allows for scaling
translation and rotation. The proposed technique
which is based on the maximization of the correlation coefficient function
combines an efficient pixel-moving interpolation scheme with surface fitting
which greatly reduces the overall computational cost. The accuracy of the algorithm is evaluated by calculating correlation coefficient of couples of points belonging to images transformed with preset factors and also comparing it to other sorts of methods. The experiment results show that the accuracy of registration reaches 0.01 pixels. 2010 IEEE.