摘要
提出了一种基于单轴晶体制作的相位型光瞳滤波器 ,与普通的相位型光瞳滤波器相比较 ,单轴晶体相位型光瞳滤波器不仅制作简单 ,而且相位差有一定的可调节性。与液晶制作的相位型光瞳滤波器相比较 ,虽然单轴晶体相位型光瞳滤波器的可调节性不如液晶相位型光瞳滤波器 ,但是单轴晶体相位型光瞳滤波器成本低 ,而且也不会对光的衰减过大。单轴晶体相位型光瞳滤波器可以实现对焦斑分布的连续调节。通过理论分析和数值计算 ,论证了单轴晶体相位型光瞳滤波器的可行性 。
Pupil filter is an important optical superresolution element. In fabrication, phase only pupil filter is more difficult than amplitude only pupil filter. Diffraction optics can be used to fabricate the phase only pupil filter, but this pupil filter cannot be tunable. The application of liquid crystal in phase\|only pupil filter makes the fabrication easy. But the large decrease of intensity and the limited phase changed depth complicate its use in phase only pupil filter. A new way to fabricate the phase only pupil filter with uniaxial crystal is put forward. This phase only pupil filter can be easily used in application. And there is no distinct decrease of light intensity. By numerical calculation, the feasibility of this design is demonstrated.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2004年第3期378-382,共5页
Acta Optica Sinica
基金
上海市科学技术发展基金 (0 1DJGK0 18)
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(2 0 0 2CB71380 8)资助课题
