利用液晶透镜实现的局部变倍成像系统

Local Zoom Imaging System Using Liquid Crystal Lens

提出了一种液晶透镜与玻璃镜头组合的新型局部变倍成像系统,以解决传统变倍成像系统中机械结构体积较大、非线性运动设计难度较大、变倍数离散等问题。首先对所提出系统进行了说明,给出了系统各参数间的关系。对实验装置进行了介绍,重点介绍了液晶透镜结构及双偏振结构。对所提系统进行了实验验证,通过改变液晶透镜组所加电压调节孔径区域内成像变倍比。这说明在系统组件无机械移动的条件下可通过调节液晶透镜组所加电压实现局部变倍成像,且变倍比连续可调。此系统不仅简化了传统变倍成像系统的机械结构,使变倍系统轻量化、小型化成为可能,还为图像细节信息的获取与分辨提供了新方法。

In this paper,a new local zoom imaging system is proposed,which contains a liquid crystal lens and a glass lens,so as to solve the problems of large mechanical structure,difficult design of nonlinear motion,and discrete zoom number in the traditional zoom imaging system.Specifically,the proposed system is firstly described,and then the relationship among the parameters of the system is derived.After that,the experimental setup is introduced,and the liquid crystal lens and the dual polarization structures are emphasized.The proposed system is then experimentally validated by changing the voltage applied to the liquid crystal lens group to adjust the imaging zoom ratio in the aperture.Furthermore,the experiment demonstrates that local zoom imaging can be achieved by adjusting the voltage applied to the liquid crystal lens group when system components do not move mechanically,and the zoom ratio is continuously adjustable.This system not only simplifies the mechanical structure of the traditional zoom imaging system,but also makes it possible to lighten and miniaturize the zoom system.In addition,it provides a new method for acquiring and resolving image detail information.