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长春光学精密机械与物... [5]
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Thermal-optical analysis for optical window under high Mach flight condition (EI CONFERENCE)
会议论文
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Zhong C.
;
Ding Y.
;
Fu J.
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  |  
浏览/下载:13/0
  |  
提交时间:2013/03/25
When the airborne platform
where installed the optical window
is in high Mach flight condition. The aerodynamic heating effect
which will influence optical properties of optical window
becomes very obvious. This special flight condition will change shape
refractive index and also refractive index distribution of optical window due to the generated high axial temperature gradient. To ensure image quality of aerial remote sensor
the present paper does thermal-optical analysis for optical window under high Mach flight condition. Then
on this basis
do simulations according to theoretical analysis and boundary conditions derived from practical assumptions in order to get the final conclusions. 2012 IEEE.
Temperature gradients effect on surface test with high precise interferometer (EI CONFERENCE)
会议论文
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
Miao E.-L.
;
Gu Y.-Q.
;
Zhang J.
;
Sui Y.-X.
;
Yang H.-J.
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浏览/下载:18/0
  |  
提交时间:2013/03/25
In high precise surface testing
temperature stability and uniformity are of paramount importance to the high accuracy of test results. Micro-temperature variation and temperature gradients not only cause the change of the air refractive index and lead to the optical path variation in interferometer cavity
but also result in deformation of the tested surface itself
which always brings about errors to the test results. Temperature effects on the interferometer cavity and the tested surface are analyzed from the axial and radial directions in this letter. Temperature model of the interferometer cavity and the tested lens are established and quantitative calculations and diagram of test results versus temperature and lens dimension are provided. It shows that temperature gradients effect increase with the length of the interferometer and the dimension of the tested lens. The interferometer cavity is mainly affected by radial temperature gradients while the tested lens is mainly affected by the axial temperature gradients. 2010 Copyright SPIE - The International Society for Optical Engineering.
Influence of spatial temperature distribution on high accuracy interferometric metrology (EI CONFERENCE)
会议论文
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
Gu Y.
;
Miao E.
;
Yan F.
;
Zhang J.
;
Yang H.
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浏览/下载:19/0
  |  
提交时间:2013/03/25
We calculate the influence of temperature change on the refractive index of air
establish a model of air temperature distribution and analyze the effect of different temperature distribution on the high accuracy interferometric metrology. First
a revised Edlen formula is employed to acquire the relation between temperature and refractive index of air
followed by introducing the fixed temperature gradient distribution among the spatial grid within the optical cavity between the reference flat and the test flat of the Fizeau interferometer
accompanied by a temperature change random function within each grid. Finally
all the rays through the air layer with different incident angles are traced by Matlab program in order to obtain the final output position
angle and OPD for each ray. The influence of different temperature distribution and the length of the optical cavity in on the testing accuracy can be analyzed through the RMS value that results from repeatable rays tracing. As a result
the horizontal distribution (vertical to optical axis) has a large effect on the testing accuracy. Thus
to realize the high accuracy figure metrology
the horizontal distribution of temperature must be rigorously controlled as well as to shorten the length of the optical cavity to a large extent. The results from our simulation are of great significant for the accuracy analysis of interferometric testing and the research of manufacturing a interferometer. 2010 Copyright SPIE - The International Society for Optical Engineering.
Using one-dimensional nonlinear photonic crystal for dynamical addressing optical interconnection (EI CONFERENCE)
会议论文
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Chen M.
;
Li C.
;
Xu M.
;
Wang W.
;
Ma S.
;
Xia Y.
;
Chen S.
;
Liu D.
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浏览/下载:22/0
  |  
提交时间:2013/03/25
Optical interconnection is the key technique of high-speed optical information process and optical communication. A lot of approaches for optical interconnection have been proposed since Goodman in Stanford University firstly proposed the optical interconnection for very large scale integrated circuits technology. A dynamical addressing device for optical interconnection was designed and fabricated in this paper. This optical device is based on one-dimensional nonlinear photonic crystal made on the planar waveguide. The nonlinear materials ZnS and ZnSe
which have large nonlinear refractive index coefficients
were alternately deposited on the waveguide to form one-dimensional photonic crystal. The Bragg condition is changed when the input power of the control light increased due to the nonlinear characters of the materials
thus the reflective angle of the signal light can be changed with the input power change of the control light. In our experiment
when increasing the power density of control light from 0 to 2.60X105W/cm 2
the angle of the signal beam can be changed about 20. The interconnection characteristics were investigated in theory and in experiment. The testing data agree well with theoretical predictions. This kind of devices is promising to use in the all-optical interconnection
optical information processing and optical communication.
Imaging quality analysis of KBA x-ray microscope working at grazing incidence (EI CONFERENCE)
会议论文
Optical Design and Testing II, November 8, 2004 - November 11, 2004, Beijing, United states
Hu J.
;
Zhao L.
;
Li X.
;
Wu X.
;
Bai Y.
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  |  
浏览/下载:16/0
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提交时间:2013/03/25
In the latest 20 years
x-ray imaging technology has developed fast in order to meet the need of x-ray photo-etching
spatial exploration technology
high-energy physics
procedure diagnosis of inertial confinement fusion (ICF) et al. Since refractive index of materials in the x-ray region is lower than 1
and x-ray is strongly absorbed by materials
it is very difficult to image objects in the x-ray region. Conventional imaging methods are hardly suitable to x-ray range. In general
grazing reflective imaging and coding aperture imaging methods have been adopted more and more. In this paper
according to user's requirement
we have designed a non-coaxial grazing KBA microscope. The microscope consists of two sets of perpendicular spherical mirrors
each set includes two parallel mirrors. Taking it as an example
we have compiled an optical computing program for the non-coaxial grazing imaging systems so as to analyze and evaluate aberrations of KBA microscope. Thus it can help us to get an optimal comprehension of KBA x-ray imaging system. In the same time
the analytical results provide reliable foundation for evaluating imaging quality of KBA microscope.
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