红外技术Issue(8)：617-623,7.
光纤面板及光锥传像特性研究
Study on Light Transmission Characteristics of Fiber Optic Faceplate and Fiber Optic Taper
摘要
Abstract
Spectrum transmittance and modulation transfer function(MTF)of fiber optic faceplate(FOP), fiber optic taper(taper), FOP coupled each other and taper coupled with FOP are measured. The measured results of spectrum transmittance indicate that the transmittance of FOP is affected by the thickness of FOP and the wavelength of incident light. For the FOP with the same thickness, the transmittance of diffused light is lower than that of collimated light. The reason is that the transmission distance of the diffused light is far longer than that of the collimating light in channel of FOP. This leads to more light absorption for diffused light than collimated light in fiber channel. In addition of the light absorption of the glass in FOP, rare earth element in the glass can generate impurity absorption as well. The measured result of the modulation transfer function shows that the modulation transfer function of FOP is not only associated with fiber diameter, but also associated with the thickness of the FOP because optical crosstalk may happen during transmission in optical fiber. Both the spectrum transmittance and the modulation transfer function of the taper are lower than those of the FOP. After a fiber optic taper is coupled to a FOP, especially in the case of diffused light, the spectrum transmittance is much lower. For the wavelength at 550 nm, the transmittance is only 11.7%. After a taper is coupled to a FOP, not only the spectrum transmittance reduces, but also the modulation transfer function becomes lower. The measured modulation transfer function at 30 lp/mm is only 47%.关键词
光纤面板/光锥/光谱透过率/调制传递函数/像增强器Key words
fiber optic faceplate(FOP)/fiber optic taper(taper)/spectrum transmittance/modulation transfer function(MTF)/image intensifier分类
生物科学引用本文复制引用
李晓峰,李莉,邓华斌,张彦云..光纤面板及光锥传像特性研究[J].红外技术,2014,(8):617-623,7.基金项目
微光夜视技术重点实验室基金“多碱光电阴极研究”，编号J2011016。 （）
