摘要
光瞳滤波器是一种重要的调控焦点处光强分布的器件。借助光的标量衍射理论,研究了不同的入射光场分布对超分辨光瞳滤波器的超分辨性能和焦深的影响。研究结果表明:在入射总光能相同的情况下,光场以高斯函数分布入射时,与均匀光入射相比,其超分辨性能和焦深扩展特性变化很小。当光场以零阶贝塞尔函数分布入射时,光斑压缩比基本不变,斯特雷尔比有所下降,焦深有一定扩展。当光场以一阶贝塞尔函数分布入射时,光斑压缩比有所减小,斯特雷尔比有较大提高,焦深有所减小。总之,在相同情况下,光束的光强分布越靠近边缘,越有利于实现超分辨,斯特雷尔比和焦深两个量中其中一个的增大以另一个的减小为代价。
The optical pupil filter is regarded as one of the most important devices in the manipulation of intensity distribution in the focal volume. The effect of different incident light distributions on the superresolution performance and the depth of focus（DOF） of superresolsing pupil filters are studied based on the scalar diffraction theory of light. The results indicate that there is little change of superresolution performance and DOF extension when the light with Gauss function distribution incidents compared with uniform light incidence with equal total incident light energy; little change of spot compression ratio is shown, the Strehl ratio is lower and the DOF is extended when the incident light with Gauss function distribution incidents; while for the incident light with the first order Bessel function, the spot compression ratio and the DOF decrease, the Strehl ratio gets large increase. In general, superresolution can be more easily realized with more light intensity distributed along the verge of the pupil, and the increase of either Strehl ratio or DOF is based on sacrifice of the other one.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第11期209-215,共7页
Laser & Optoelectronics Progress
基金
中央高校基本科研业务费专项基金(14CX02021A
201310425066
20121174)
瞬态光学与光子技术国家重点实验室开放基金(SKLST201204)
山东省自然科学基金(ZR2012DL12)
关键词
光学器件
信息光学
应用光学
光瞳滤波
光学超分辨
聚焦光强分布
optical devices
information optics
applied optics
optical pupil filtering
optical superresolution
focused intensity distribution
