摘要
提出了用波晶片产生可调矩形空心光束的新方案,根据晶体的双折射性质设计波晶片的厚度分布,使波片分别对o光、e光形成4台阶相位板和π相位板,线偏振光垂直于波晶片表面入射,便可获得截面为矩形的空心光束。调节透光窗口的长和宽,则可调节空心光束截面的长与宽之比,光路简单,调节方便。用长焦距透镜组和圆锥面棱镜组成的光学系统聚焦衍射光,可获得近似无衍射矩形空心光束;用高数值孔径透镜聚焦,可获得矩形"空心饼"光束。
A new scheme is proposed to generate adjustable rectangular hollow beams by wave plates. According to the birefringent property of crystals, the thickness distribution of wave plates is designed. The wave plates can form the four-step phase plate to o light and the ~ phase plate to e light. The rectangular crosssection hollow beams will be obtained with the vertically irradiate on the surface of the wave plate by linearly polarized light beams. In addition, it is simple optical arrangement and easy adjustment to regulate the ratio of the length and the width of the adjustable rectangular hollow beams by means of the adjustment of the length and width of the light transmission windows. Approximate nondiffracted rectangular hollow beams will be obtained through the optical system consisting of the long focal length lens group and a conical surface prism focus diffracted light. ＇Hollow bread＇ beams with the rectangular section will be obtained through the focusing of the high numerical aperture lens.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2015年第9期314-321,共8页
Acta Optica Sinica
基金
国家自然科学基金(11034002
11274114)
科技部量子调控重大研究计划(2011CB921602)
关键词
物理光学
原子光学
空心光束
波晶片
physical optics
atomic optics
hollow beams
wave plates
