电控径向滤波器的横向超分辨与轴向焦移

提出一种光瞳滤波器来同时实现横向超分辨和轴向焦移效应的电控制.该光瞳滤波器由两偏光镜及包含有径向双折射元件的任意偏振态的电控旋光器组成.利用径向双折射元件对光偏振态的空间调制作用，结合旋光器对任意偏振态光的旋光作用，与两个偏光镜结合，实现了空间偏振态的重新分布.利用庞加莱球及琼斯理论进行了分析，结果表明，借助这种电致位相延迟来实现的偏振态调制效应，可同时实现横向超分辨与轴向焦移效应.对能够同时获得横向超分辨与轴向焦移的情况进行了分析，得到了系统各组成参量及电光调制范围.

Electrically Control of Transverse Superresolution and Axial Focal Shift with Radial Birefringent Filter

The electrically control of polarization-assisted transverse superresolution and axial focal shift utilizing electrically control radial birefringent pupil filter has been proposed in this paper. The structure of the filter consists of two parallel polarizers, an electrically controllable azimuth optical rotator including two quarter-wave plates and one liquid crystal or electro-optical variable wave plate and a symmetric birefringent element. Variation of light polarization caused by electro-optical effect provides the feasibility controlling the superresolution and focal capability. Polarization states transformation on the Poincar~ Sphere and Jones calculus for transmitted intensity are involved in this system. The most interesting and useful advantage of such a structure is that its transverse superresolution and axial focal shift quality can be changed merely controlling the applied-voltage on the electro-optical element. So no mechanic rotation is involved such as applied in the former design, and the vibration noise can also be avoided. Different structure parameters for obtained double effect such as azimuth angles of radial birefringent element and electro-optical modulation range are also given.