三区复振幅光瞳滤波器  

Three-Zone Complex Pupil Filter

作　　者：肖繁荣[1] 袁景和[1] 王桂英[1] 徐至展[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2004年第1期1-4,共4页Acta Optica Sinica

基　　金：国家自然科学基金 (6 0 0 780 2 5 );国家科技部重大基础研究基金;上海市科学技术发展基金 (0 1DJGK0 18)资助课题

摘　　要：利用光瞳滤波器来改变光在焦斑处的分布 ,是实现光学超分辨的有效途径。由于受到制作上的影响 ,现有的光瞳滤波器大都是纯相位型或者纯振幅型的。与纯相位或者纯振幅型光瞳滤波器相比较 ,复振幅型光瞳滤波器能够实现更好的滤波效果。不过由于制作上的困难 ,影响了复振幅的光瞳滤波器在实际中的应用。为此给出了一种相对容易实现的复振幅型光瞳滤波器 ,通过计算表明 :在横向具有相同的第一零点比和斯特雷尔比下 ,该复振幅型光瞳滤波器的旁斑强度比优于纯相位型光瞳滤波器 5 0 % ,并且有效地降低了纯相位型光瞳滤波器的轴向加宽。It is an alternative means of changing the distribution of light beam at the focusing spot and realizing optical superresolution by the pupil filter. For the difficulty of fabrication,the current pupil filters are always phase-only pupil filter or amplitude-only pupil filter. Compared with them,complex pupil filter is more powerful in superresolution. Because of fabrication difficulty,practical application of complex pupil filter is limited. A new way to realize a class of complex pupil filter is proposed. Three-zone complex pupil filter is analyzed by numerical computation. The result shows that M of this complex pupil filter is decreased 50% than phase-only pupil filter with the same G and strehl ratio S,the axial deterioration of phase-only pupil filter is also improved.

关 键 词：信息光学 光瞳滤波器 第一零点比 斯特雷尔比 旁斑强度比 分辨力 复振幅 光学成像 

分 类 号：TN713.1[电子电信—电路与系统] O439[机械工程—光学工程]