基于贝塞尔函数的振幅型系列超分辨光瞳滤波器的设计

Design of Amplitude Superresolving Pupil Filter Based on Bessel Function

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一种有效途径。设计了一种基于贝塞尔(Bessel)函数的振幅型超分辨光瞳滤波器。详细分析了此种类型的两区型、三区型和四区型光瞳滤波器的主瓣半径尺寸比G、斯特雷尔比S和最高旁瓣强度比M等性能参量。通过计算表明,基于贝塞尔函数的振幅型光瞳滤波器具有超分辨能力。

It is an alternative means of changing the distribution of light beam at the focusing spot and realizing optical superresolution by a pupil filter. A new type of superresolving pupil filter based on Bessel function is introduced. Two-zone, three-zone and four-zone pupil filters are discussed in detail and the superresolving figures of merits such as normalized compression ratio, Strehlratio and maximum sidelobe energy ratio are analyzed respectively. The results show that this new type of pupil filter based on Bessel function has the ability of superresolution.