光学
数值孔径
极化(电化学)
同心的
相位调制
光学(聚焦)
镜头(地质)
材料科学
物理
波长
相位噪声
几何学
数学
物理化学
化学
作者
Ching Cherng Sun,Chin Ku Liu
出处
期刊:Optics Letters
[The Optical Society]
日期:2003-01-15
卷期号:28 (2): 99-99
被引量:98
摘要
A design for focusing an incoming light into an ultrasmall spot with a long depth of focus is proposed. We use a phase plate with three concentric regions to modulate the incoming light from radial polarization into outward-inward-outward polarization. The analysis shows that the design is more suitable for a lens with a high numerical aperture because much energy is concentrated in the main lobe of the focus spot.
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