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长春光学精密机械与物... [4]
西安光学精密机械研究... [1]
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OAI收割 [5]
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会议论文 [5]
发表日期
2010 [5]
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电子、电信技术::半... [1]
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发表日期:2010
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Technology Trend and Challenges in High Power Semiconductor Laser Packaging
会议论文
OAI收割
59th electronic components and technology conference (ectc), san diego, california usa, 2009-05
Xingsheng Liu
;
Wei Zhao
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浏览/下载:282/49
  |  
提交时间:2010/01/14
Trend and Challenges
High Power Semiconductor Laser
Packaging
SSA based decomposition of tool position trajectory for diamond turning of freeform optical surfaces (EI CONFERENCE)
会议论文
OAI收割
2009 International Conference on Manufacturing Science and Engineering, ICMSE 2009, December 26, 2009 - December 28, 2009, Zhuhai, China
作者:
Liu Q.
;
Lin C.
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  |  
浏览/下载:16/0
  |  
提交时间:2013/03/25
The radial spiral feed of the tool and the tool nose radius compensation are taken into consideration for the tool position trajectory (TPT) generation in diamond turning of freeform optical surfaces. Using the coarse sampling and the fine interpolation
a novel approach based on singular spectrum analysis (SSA) is presented to decompose the generated TPT into a slowly varying trend and a quickly varying quasi-periodic oscillation. The numerical experiments of the TPT decomposition of toroidal surfaces have been carried out. The results verify that the proposed approach is very effective for the TPT decomposition. (2010) Trans Tech Publications.
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.
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浏览/下载:18/0
  |  
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.
Research on automatic Hartmann test of membrane mirror (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:
Zhang P.
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浏览/下载:20/0
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提交时间:2013/03/25
Electrostatic membrane mirror is ultra-lightweight and easy to acquire a large diameter comparing with traditional optical elements
so its development and usage is the trend of future large mirrors. In order to research the control method of the static stretching membrane mirror
the surface configuration must be tested. However
membrane mirror's shape is always changed by variable voltages on the electrodes
and the optical properties of membrane materials using in our experiment are poor
so it is difficult to test membrane mirror by interferometer and null compensator method. To solve this problem
an automatic optical test procedure for membrane mirror is designed based on Hartmann screen method. The optical path includes point light source
CCD camera
splitter and diffuse transmittance screen. The spots' positions on the diffuse transmittance screen are pictured by CCD camera connected with computer
and image segmentation and centroid solving is auto processed. The CCD camera's lens distortion is measured
and fixing coefficients are given to eliminate the spots' positions recording error caused by lens distortion. To process the low sampling Hartmann test results
Zernike polynomial fitting method is applied to smooth the wave front. So low frequency error of the membrane mirror can be measured then. Errors affecting the test accuracy are also analyzed in this paper. The method proposed in this paper provides a reference for surface shape detection in membrane mirror research. 2010 Copyright SPIE - The International Society for Optical Engineering.
Modulation transfer function in seeker camera limits resulting from missile flutter caused by aerodynamic force (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:
Zhang X.
;
Zhang X.
;
Zhang X.
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  |  
浏览/下载:24/0
  |  
提交时间:2013/03/25
The imaging quality of seeker in flight mode has been evaluated through analyzing the effects of missile flutter on optical modulation transfer function (MTF) of the optical system. Firstly the data of transverse vibration has been processed to eliminate the trend term caused by the trajectory
then obtained the displacement with two times trapezoidal integration. For the side rotation
the high frequency noise interference in the data has been filtered by using five-point moving average method. Took this model as the quivering rule between the object and the image
and then analyzed the effects of the transverse vibration and the side rotation on imaging quality through MTF. By calculation
the r.m.s value of the image motion caused by missile transverse vibration is 0.026mm
and the side rotation angle is 0.0044 . Through the establishment of two modulation transfer functions (MTF) of image random vibration and linear vibration
the results show that the image quality had declined
and the effect of transverse vibration on image quality is obvious. Through improving the rigidity of the missile and selection of small focal length optical system and shorten the time of exposure can improve the imaging quality of the seeker. 2010 IEEE.