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Optical Model of a Human Eye’s Crystalline Lens based on a Three-layer Liquid Lens
Meimei Kong,Xin Chen,Yang Yuan,Rui Zhao,Tao Chen,Zhongcheng Liang 한국광학회 2019 Current Optics and Photonics Vol.3 No.2
Based on liquid-lens technology and our previous findings on the optical model of the Chinese eye, the liquid lens is applied in the research of the crystalline-lens optical model. Theoretical models of three-layer liquid lenses are built with COMSOL software, and the effect of voltage on the shape of the interface between two liquids is analyzed. By polynomial fitting, different equations describing the interface shape are set up under different voltages. Finally, the optical system of the human eye with a three-layer liquid lens is built and analyzed with Zemax optical design software, and moreover the optical system models of emmetropia, myopia, and hyperopia are presented. This method to build a model of the human eye with a variable-focus liquid lens can provide a novel idea for more practical human-eye models for clinical regulation and control in the future.
Meimei Chen,Shan Jiang,Ce Cui,Wenhao Bai,Jianyu Zhai,Ronghui Guo 한국섬유공학회 2023 Fibers and polymers Vol.24 No.8
With the rapid development of modern technology, more and more electronic equipment had entered people’s life, causing serious electromagnetic pollution. In this study, a lightweight, ultra-thin and high electromagnetic shielding film was fabricated by copper electroless deposition after solution immersion coating method combining chitosan (CTS) and reduced graphene oxide on glass fabric (Cu/RGO-CTS-coated glass fabric). Chitosan and RGO had synergistic effect for copper deposition, enhancing electrical conductivity and electromagnetic shielding property. The prepared fabric showed superb conductivity of 8589.3 S/cm and the shielding effectiveness of the Cu/RGO-CTS-coated glass fabric showed as high as 93.6 dB at ultra-thin thickness of 92.4 μm (SSE/t = 3868.8 dB cm2 g-1). Thermal conductivity, antibacterial and hydrophobic properties were also studied. Compared with untreated glass fabric, thermal conductivity of Cu/RGO-CTS-coated glass fabric increased by 437%, protecting electronic equipment from adverse effects at high temperature. Cu/RGO-CTS-coated glass fabric had inhibitory effect on Staphylococcus aureus and Escherichia coli, which could prolong the service life and maintain the appearance of the fabric. Cu/RGO-CTS-coated glass fabric also showed hydrophobicity with self-cleaning function, making it possible for the composite material to be used in many fields such as aerospace industry, microelectronic devices, and transportation to resist electromagnetic interference in high humidity and high pollution environment.
Effect of the Liquid Density Difference on Interface Shape of Double-Liquid Lens
Meimei Kong,Lingfeng Zhu,Dan Chen,Zhongcheng Liang,Rui Zhao,Enming Xu 한국광학회 2016 Current Optics and Photonics Vol.20 No.3
The effect of the liquid density difference on interface shape of a double-liquid lens is analyzed indetail. The expressions of interface shape of two liquids with liquid density difference are analyzed andfitted with “even asphere”. The imaging analysis of the aspheric interface shape of a double-liquid lensis presented. The results show that the density difference of two liquids can cause the interface to bean aspheric surface, which can improve the image quality of a double-liquid lens. The result providesa new selection for the related further research and a wider application field for liquid lenses.