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长春光学精密机械与物... [2]
上海大学 [1]
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会议论文 [2]
期刊论文 [1]
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2014 [1]
2010 [1]
2009 [1]
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Carrier transfer and luminescence characteristics of concentration-dependent phosphorescent Ir(ppy)(3) doped CBP film
期刊论文
OPTICS AND LASER TECHNOLOGY, 2014, 卷号: 56, 页码: 20-24
作者:
Gao, Zhixiang[1]
;
Wang, Feifei[2]
;
Guo, Kunping[3]
;
Wang, Hua[4]
;
Wei, Bin[5]
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浏览/下载:1/0
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提交时间:2019/04/30
Organic light-emitting diodes
Ir(ppy)(3) doped CBP
Charge-only
A design on a control method of a new type of focal plane shutter (EI CONFERENCE)
会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Xue L.
;
Ming L.
;
Zheng L.-N.
;
Zhou J.-F.
;
Zhang H.-W.
;
Zhang J.-C.
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提交时间:2013/03/25
In order to ensure appropriate exposure time
and no exposure while electric charge is transferring after taking a photograph
it is necessary to have the shutter mechanism cooperate with CCD for area CCD aerial cameras. The ground object illumination has a wide range which is from 4000Lx to 100000Lx
so a shutter which is high efficient and a continuous stepless adjustment are also required. This paper introduces the fundamental principle
structural design and control procedure about this new focal plane shutter. Under the control of DSP
the velocity of shutter curtain governed by the shutter motor can be not only precisely controlled
but also the durability and the reliability are increased. The experiment results have shown that this new shutter has the higher stability of movement
long life span with more than 105 operating times
a wide range of exposure time from1/ 50s to 1/ 320s(depending on the slit width)and the exposure error is less than 10%. With the CCD gain adjustment
the performance of this shutter is fully satisfied with the requirements of area CCD aerial cameras. 2010 IEEE.
Analysis of laser jamming to satellite-based detector (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
Wang S.-W.
;
Guo L.-H.
;
Guo R.-H.
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浏览/下载:17/0
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提交时间:2013/03/25
The reconnaissance satellite
communication satellite and navigation satellite used in the military applications have played more and more important role in the advanced technique wars and already become the significant support and aid system for military actions. With the development of all kinds of satellites
anti-satellite laser weapons emerge as the times require. The experiments and analyses of laser disturbing CCD (charge coupled detector) in near ground have been studied by many research groups
but their results are not suitable to the case that using laser disturbs the satellite-based detector. Because the distance between the satellite-based detector and the ground is very large
it is difficult to damage it directly. However the optical receive system of satellite detector has large optical gain
so laser disturbing satellite detector is possible. In order to determine its feasibility
the theoretical analyses and experimental study are carried out in the paper. Firstly
the influence factors of laser disturbing satellite detector are analyzed in detail
which including laser power density on the surface of the detector after long distance transmission
and laser power density threshold for disturbing etc. These factors are not only induced by the satellite orbit
but dependence on the following parameters: laser average power in the ground
laser beam quality
tracing and aiming precision and atmospheric transmission. A calculation model is developed by considering all factors which then the power density entering into the detector can be calculated. Secondly
the laser disturbing experiment is performed by using LD (laser diode) with the wavelength 808 nm disturbing CCD 5 kilometer away
which the disturbing threshold value is obtained as 3.5510-4mW/cm2 that coincides with other researcher's results. Finally
using the theoretical model
the energy density of laser on the photosensitive surface of MSTI-3 satellite detector is estimated as about 100mW/cm2
which is largely exceed the disturbing threshold and therefore verify the feasibility of using this kind of laser disturbing the satellite-based detector. According to the results. using the similar laser power density absolutely saturate the requirements to laser disturbing satellite-based detector. If considering the peak power of pulsed laser
even decrease laser average power
it is also possible to damage the detector. This result will provide the reliable evidences to evaluate the effect of laser disturbing satellite-based detector. 2009 SPIE.
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