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CAS IR Grid
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长春光学精密机械与物... [3]
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OAI收割 [3]
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会议论文 [3]
发表日期
2013 [2]
2011 [1]
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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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Luminescence and energy transfer in Ca3Sc2Si 3O12:Ce3+,Mn2+ white LED phosphors
会议论文
OAI收割
P.O. Box 211, Amsterdam, 1000 AE, Netherlands
作者:
Zhang X.
;
Liu Y.
;
Zhang J.
;
Zhang J.
;
Zhang J.
收藏
  |  
浏览/下载:36/0
  |  
提交时间:2014/05/15
Luminescence and energy transfer in Ca3Sc2Si 3O12:Ce3+,Mn2+ white LED phosphors (EI CONFERENCE)
会议论文
OAI收割
作者:
Luo Y.
;
Zhang J.
;
Zhang J.
;
Zhang J.
;
Wang X.
收藏
  |  
浏览/下载:31/0
  |  
提交时间:2013/03/25
Expanded emission spectra ranging from green to red are reported in Ca 3Sc2Si3O12 (CSS):Ce 3+
Mn2+ silicate garnets. Mn2+ may occupy Ca2 site (Mn2+(I)) to generate a yellow emission band at 574 nm or Sc3 site (Mn2+(II)) with red emission band at 680 nm. Efficient energy transfers from the green emitting Ce3+ to both Mn2+(I) and Mn2+(II) occur upon blue excitation into Ce3+. Concentration dependence of Mn2+ emission is analyzed based on Ce3+-Mn2+ energy transfer
steady state rate equations
and fluorescence lifetimes. Energy transfer efficiency (nT) and rate (W) are calculated with values as high as 45% and 14.01106 s-1
respectively. 2011 Elsevier B.V.
Surface shape optimization for the space membrane reflector (EI CONFERENCE)
会议论文
OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者:
Zhang Y.
;
Zhang P.
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浏览/下载:16/0
  |  
提交时间:2013/03/25
Space membrane reflector is very promised for optical quality application with the merits of ultra-lightweight and flexible. In order to improve the surface precision of membrane reflectors
the formation and surface shape error of a membrane at uniform load are studied based on the henky-cambell equations of circular membrane. The ANSYS software is used to build an optimization model of membrane reflector surface shape
in which the yield strength is the state variable
the surface load on ten concentric annular regions of the mirror is the design variable
and the minimum RMS between ideal surface and mirror surface is the target function. and the theoretical and experimental result show that RMS and PV of the optimized surfaces are reduced respectively than those before optimization. In a word
this paper offers the theoretical and experimental basis of the polyimide membrane reflector. 2011 IEEE.