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浸没介质对微球超分辨成像的影响

发表时间:2015-08-15  浏览量:1687  下载量:476
全部作者: 曹玲玲,姚岭,叶永红
作者单位: 南京师范大学物理科学与技术学院
摘 要: 使用4种不同折射率的浸没介质(去离子水,无水乙醇,质量浓度为50%的盐水和透镜浸没油)浸没 3种不同材质的微球[钛酸钡(barium titanate glass,BTG),聚苯乙烯(polystyrene,PS)和二氧化硅(silica,SS)],对蓝光光碟样品进行成像实验。发现上述4种液体均可以作为浸没介质,浸没微球时可观察到超分辨成像和放大作用。此外,还发现微球成像的放大率和对比度与相对折射率有关,相对折射率越大,放大率越大,对比度也越高。最后使用CST软件对实验结果进行仿真和理论解释。
关 键 词: 光学;微球透镜;超分辨成像;浸没介质
Title: Optical super-resoluntion imaging properties of microscale spherical lenses with immersion medium
Author: CAO Lingling, YAO Ling, YE Yonghong
Organization: School of Physics and Technology, Nanjing Normal University
Abstract: In this paper, the imaging properties of three kinds of microspheres [barium titanate glass(BTG), polystyrene (PS) and silica (SS)] semi-immersed or full-immersed in four different refractive index immersion medium (deionized water, ethanol, 50% salt solution, microscope immersion oil) are studied. We find that the three kinds of microspheres semi-immersed or full-immersed in the four immersion medium can magnify the stripe patterns of the disc and have super-resolution imaging ability. Moreover, we find that the image magnification and contrast can be decided by the relative refractive index between a microsphere and the immersion medium. A higher relative refractive index can increase image magnification and contrast. The mechanisms are also discussed with numerical simulations based on CST software.
Key words: optics; microscale spherical lenses; super-resolution imaging; immersion medium
发表期数: 2015年8月第15期
引用格式: 曹玲玲,姚岭,叶永红. 浸没介质对微球超分辨成像的影响[J]. 中国科技论文在线精品论文,2015,8(15):1587-1593.
 
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