21 November 2014 Numerical analysis on imaging character of a single microsphere
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Abstract
The imaging character of microsphere is determined by its refractive index and size. In this paper, it is demonstrated that the spherical aberration(S) and numerical aperture (NA) of the microsphere are different with different refractive index or different radius. The relationship between the focal length and refractive index is obtained by numerical simulation. It is shown that the focal length decreases with the increase of the refractive index. The focal length and diameter possesses a linear relation,which is matched with the theoretical result. It is also found that the photonic nano-jet may appear when the refraction index and size of the microsphere are chosen properly. The microsphere has great potential in the laser processing of surfaces materials and super-resolution detection of nano structure etc. So the study on the microsphere imaging has great significance.
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Sha Guo, Sha Guo, Yunxin Wang, Yunxin Wang, Dayong Wang, Dayong Wang, Qiaowen Lin, Qiaowen Lin, Lu Rong, Lu Rong, } "Numerical analysis on imaging character of a single microsphere", Proc. SPIE 9296, International Symposium on Optoelectronic Technology and Application 2014: Advanced Display Technology; Nonimaging Optics: Efficient Design for Illumination and Solar Concentration, 92960L (21 November 2014); doi: 10.1117/12.2073411; https://doi.org/10.1117/12.2073411
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