长时间使用手机、平板电脑、电脑显示屏等设备，已成为当今社会生活中十分普遍的现象.这些设备的发光波段具体 是多少? 是否会对人们眼部视力造成伤害? 这也成为大家十分关注的问题.针对这些问题，本文利用光谱仪测量了不同型号 手机、电脑显示屏的发光光谱，以及光谱强度随探测距离的变化，并对不同设备进行了分析和比较，讨论了这些设备对人眼可能造成的危害.

Spending too much time on mobile phone， tablets and other mobile devices has become a very common phenomenon. In this paper， the screen spectra of different types of mobile phone and computers are collected by using optical fiber spectrometer and the intensity with the distance was studied as well. The result shows that the spectral emission bands of the electronic display screen are mainly on 450 nm， 530 nm and 590 nm. The intensity of blue emission varies with types of products，which means the damage of blue light to the human eye is different with products.