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在荧光灯的燃点过程中,灯的光效和显色指数随时间的延续有一定程度的降低,这种现象与灯内荧光粉的发光强度随时间下降即光衰有关.影响荧光粉光衰的因素很多,诸如灯内紫外光子辐照、离子轰击、荧光粉本身的结构等.目前有关荧光粉光衰的产生过程及影响因素还没有较系统的解释. 荧光粉的发光一般经过如下几个过程:①粉体吸收紫外光子;②能量在粉体内传递转移;③发射可见光子.上述各个过程都对发光强度有贡献.本文分析了不同粒子对荧光粉的作用情况以及两类不同吸收的荧光粉的发光过程,讨论了光衰机理,得到了如下结
In the process of flashing of the fluorescent lamp, the luminous efficacy and the color rendering index of the lamp decrease with time, which is related to the decline of the luminous intensity of the fluorescent powder in the lamp over time, that is, the decline of the phosphor There are many factors, such as lamp ultraviolet photon irradiation, ion bombardment, the structure of the phosphor itself, etc. At present, there is no systematic explanation about the production process and influential factors of phosphor’s decay.Generally, phosphor luminescence generally goes through the following processes : ① the powder absorbs ultraviolet photons; ② the energy transfer within the powder transfer; ③ emit visible photons. Each of the above processes contribute to the luminous intensity.This paper analyzes the effect of different particles on the phosphor and two types of different absorption of phosphor The light-emitting process is discussed. The mechanism of light failure is discussed. The following results are obtained