OPTICAL IMAGING CHARACTERISTICS OF A NEW LIQUID CRYSTAL LENS
OPTICAL IMAGING CHARACTERISTICS OF A NEW LIQUID CRYSTAL LENS
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新型液晶透镜的光学成像特性
DOI：
10.3724/sp.j.1010.2009.00428
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发表时间：
2009
影响因子：
0.7
通讯作者：
Shen Xu-Bang
中科院分区：
文献类型：
--
作者：
Li Hui;Zhang Tian-Xu;Zhang Xin-Yu;Shen Xu-Bang
提出了一种用聚酰亚胺薄膜代替玻璃作为隔离层的新型圆孔型电极液晶透镜。该透镜具有2 mm的透明孔径，可以工作在低至1.1Vrms的控制电压下。将几何光学与液晶理论相结合，提出了一种与传统模型不同的模型，得到了焦距和位相延迟的理论公式。在1.1~20Vrms的范围内，测量了20 mm~480 mm的焦距。对LC透镜的调制传递函数进行了研究，发现其成像特性与控制电压成正比，随着控制电压的增加，成像特性也增强。
A new circular hole pattern electrode liquid crystal(LC) lens was proposed,which used the polyimide film to replace the glass as an isolation layer.This LC lens has a 2mm clear aperture,and it can operate at as low as 1.1Vrms controlled voltage.A model,for which the explanation of LC lens was different from the traditional one,was proposed by combining geometrical optics with the theory of LC.Then the theoretical formulas of focal length and phase retardation were obtained.The focal length is from 20mm to 480mm tested in the range from 1.1Vrms to 20Vrms,the value of which is close to the theoretical value.The modulation transfer function of LC lens was also studied.It is found that the imaging characteristics are proportional to the controlled voltage.As the voltage increases,the imaging characteristics also enhance.