The Research of UV-Responsive Sensitivity Enhancement of Fluorescent Coating Films by MgF2 Layer
LU Zhong-rong, NI Zheng-ji, TAO Chun-xian*, HONG Rui-jin, ZHANG Da-wei, HUANG Yuan-shen
Shanghai Key Laboratory of Modern Optical System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract：A low cost and less complicated expansion approach of wavelength responses with a Lumogen phosphor coating was adopted, as they increased the quantum efficiency of CCD and CMOS detectors in ultra-violet by absorbing UV light and then re-emitting visible light. In this paper, the sensitivity enhancement of fluorescence coatings was studied by adding an anti-reflection film or barrier film to reduce the loss of the scattering and reflection on the incident interface. The Lumogen and MgF2/Lumogen film were deposited on quartz glasses by physical vacuum deposition. The surface morphology, transmittance spectrum, reflectance spectrum and fluorescence emission spectrum were obtained by atomic force microscope (AFM), spectrophotometer and fluorescence spectrometer, respectively. The results indicated that MgF2 film had obvious positive effect on reducing scattering and reflection loss in 500～700 nm, and enhancing the absorption of Lumogen coating in ultraviolet spectrum. Meanwhile, the fluorescent emission intensity had a substantial increase by smoothing the film surface and thus reducing the light scattering. At the same time, the MgF2 layer could protect Lumogen coating from damaging and contamination, which give a prolong lifetime of the UV- responsive CCD sensors with fluorescent coatings.
卢忠荣，倪争技，陶春先*，洪瑞金，张大伟，黄元申 . MgF2薄膜对荧光薄膜紫外响应灵敏度的增强特性研究 [J]. 光谱学与光谱分析, 2014, 34(03): 709-712.
LU Zhong-rong, NI Zheng-ji, TAO Chun-xian*, HONG Rui-jin, ZHANG Da-wei, HUANG Yuan-shen . The Research of UV-Responsive Sensitivity Enhancement of Fluorescent Coating Films by MgF2 Layer . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(03): 709-712.
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