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1. 西安理工大学 理学院,陕西 西安 710048,E-mail: ltp1801@163.com
2. 西安工程大学 理学院,陕西 西安,710048
3. 北方夜视技术股份有限公司 西安分公司,陕西 西安,710065
4. 西安理工大学 自动化学院,陕西 西安,710048
收稿日期:2009-08-23,
修回日期:1900-01-02,
网络出版日期:2010-04-30,
纸质出版日期:2010-04-30
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唐远河;张瑞霞;刘汉臣;刘术林;刘 锴;郜海阳;杨旭三;赵高翔;李 卿;梁 元;叶 娜. 基于光强选通成像的液晶透过谱研究[J]. 液晶与显示, 2010,25(2): 200-204
TANG Yuan-he;ZHANG Rui-xia;LIU Han-chen;LIU Shu-lin;LIU Kai;GAO Hai-yang;YANG Xu-san;ZHAO Gao-xiang;LI Qing;LIANG Yuan;YE Na. LCD Transmission Spectrum Based on Light Intensity Gated Imaging[J]. 液晶与显示, 2010,25(2): 200-204
唐远河;张瑞霞;刘汉臣;刘术林;刘 锴;郜海阳;杨旭三;赵高翔;李 卿;梁 元;叶 娜. 基于光强选通成像的液晶透过谱研究[J]. 液晶与显示, 2010,25(2): 200-204 DOI:
TANG Yuan-he;ZHANG Rui-xia;LIU Han-chen;LIU Shu-lin;LIU Kai;GAO Hai-yang;YANG Xu-san;ZHAO Gao-xiang;LI Qing;LIANG Yuan;YE Na. LCD Transmission Spectrum Based on Light Intensity Gated Imaging[J]. 液晶与显示, 2010,25(2): 200-204 DOI:
为了更好地将液晶器件应用于选通成像系统中
从理论上推导出了液晶器件透过率与波长、折射率、电压之间的关系。从双折射率与光强的关系定量分析了扭曲向列相液晶的色散效应。用光栅光谱仪选择380~1 100 nm波段
以SONY公司LCX023CMT型号的TFT-LCD为样品
测试了液晶器件在不同灰度级和波长下的透射率。研究结果表明:液晶器件在可见光波段色散较小
随着灰度值的增加
色散增大;通过自制的光强局部选通成像系统对同一物体进行了对比拍摄
选通后的照片表明液晶器件的色散对成像质量影响不大;该液晶器件对红外光线有近12%的透过率
证明其可以实现近红外波段的强光局部选通成像。
In order to better apply LCD to the gated imaging system
based on the electro-optic effect of LCD
the relationships between transmittance and wavelength
birefringence index
voltage are derived theoretically. The dispersive of twisted nematic liquid crystal is quantitatively analyzed from the relationship of effective birefringence and transmittance. By the grating spectrometer
the transmittance of liquid crystal is measured and analyzed using Sony LCX023CMT TFT-LCD at 380~1 100 nm wavelength and altering grey level from 0 ~ 255 in this experiment. It was found that the LCX023CMT LCD has a low dispersion within the visible light. But dispersion increased along with the gray level. Two pictures have been shot under same environment by self-made partial gated imaging system or without which are contrasted each other
and there is little dispersive effect which can not affected the imaging quality. The partial light intensity gated can be realized for the strong near infrared by its 12% transmittance.
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. Mohammad Sultan Mahmud, Izabela Naydenova,Vincent Toal. Implementation of phase-only modulation utilizing a twisted nematic liquid crystal spatial light modulator [J]. Appl. Opt., 2008, 10(8):1-6.
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. 姜宝光, 穆全全, 曹召良,等.液晶波前校正器校正水平方向上的大气湍流[J]. 液晶与显示, 2009,24 (3):396-398.
. 唐远河,张瑞霞,刘锴, 等.一种基于液晶自动控制光强实现局部选通的探测器:中国,CN101368846 .2009-02-18.
. 唐远河,李卿,刘锴, 等. 基于HTPS液晶板的局部选通探测器:中国,ZL200810232000.9 .2010-01-27.
. 唐远河,赵高翔,刘锴,等. 光电成像系统高宽容度液晶选通电荷耦合器件及制备方法:中国,ZL200810232003.2 .2009-12-17.
. 梁元,唐远河,刘锴,等. 一种基于液晶的单镜头局部选通成像探测器:中国,CN101576410 .2009-11-11.
. Zhang Ruixia, TangYuanhe, Liu Kai, et al. Partial gating image intensifier based on liquid crystal auto-controlling light intensity [J]. Proc. of SPIE, 2008, 72790:72790T(1-7).
. Marquez A,Iemmi C,Moreno I, et al. Quantitative prediction of the modulation behavior of twisted nematic liquid crystal displays based on a simple physical model [J]. Opt. Eng., 2001, 40(10):2558-2564.
. 黄翀, 周学平, 欧阳艳东,等. 液晶光阀的电光色散特性研究[J]. 光谱学与光谱分析, 2006, 26(3):540.
. 赵阶林,任广军. 液晶电控效应的实验研究[J]. 液晶与显示 , 2006,21(4): 384-387.
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