Browsing by Author "Xiao, Xiao"

Now showing 1 - 3 of 3

Analysis of the depth of field of integral imaging displays based on wave optics
(2013-12-16)
Luo, Cheng-Gao
;
Xiao, Xiao
;
Martinez-Corral, Manuel
;
Chen, Chih-Wei
;
Javidi, Bahram
In this paper, we analyze the depth of field (DOF) of integral imaging displays based on wave optics. With considering the diffraction effect, we analyze the intensity distribution of light with multiple microlenses and derive a DOF calculation formula for integral imaging display system. We study the variations of DOF values with different system parameters. Experimental results are provided to verify the accuracy of the theoretical analysis. The analyses and experimental results presented in this paper could be beneficial for better understanding and designing of integral imaging displays. (C) 2013 Optical Society of America
Extended depth-of-focus 3D micro integral imaging display using a bifocal liquid crystal lens
(2015-02-15)
Shen, Xin
;
Wang, Yu-Jen
;
Chen, Hung-Shan
;
Xiao, Xiao
;
Lin, Yi-Hsin
We present a three dimensional (3D) micro integral imaging display system with extended depth of focus by using a polarized bifocal liquid crystal lens. This lens and other optical components are combined as the relay optical element. The focal length of the relay optical element can be controlled to project an elemental image array in multiple positions with various lenslet image planes, by applying different voltages to the liquid crystal lens. The depth of focus of the proposed system can therefore be extended. The feasibility of our proposed system is experimentally demonstrated. In our experiments, the depth of focus of the display system is extended from 3.82 to 109.43 mm. (C) 2015 Optical Society of America
Low driving voltage and efficient orange-red phosphorescent organic light-emitting devices based on a benzotriazole iridium complex
(2009-09-01)
Xia, Zhen-Yuan
;
Xiao, Xiao
;
Su, Jian-Hua
;
Chang, Chi-Sheng
;
Chen, Chin H.
Efficient orange-red phosphorescent organic light-emitting devices (PHOLED) with various doping concentrations of benzotriazole-iridium complex [(TBT)(2)Ir(acac)] (bis[4-(2H-benzotriazol-2-yl)-N,N-wdiphenyl-aniline-N(1),C(3)] iridium acetylacetonate) in 4,4'-N,N'-di(carbazolyl) biphenyl (CBP) host were fabricated. The sterically hindered iridium ligands alleviate self-quenching of the phosphorescence at high doping levels. Under the optimal doping concentration of 20 wt.%, the maximum external quantum efficiency (EQE), luminance and power yield reach 9.06%, 15.81 cd/A and 13.8 Im/W, respectively. Increasing the doping concentration from 5% to 30 wt.% significantly decreases the driving voltage. The driving voltage of 30% (TBT)(2)Ir(acac) doped device is only 3.16V at 1 mA/cm(2) with power yield of 13.32 lm/W. (C) 2009 Elsevier B.V. All rights reserved.