滤光片简介——第一部分滤光片的定义及工作原理
频道2018-09-07T14:34:38+08:00
滤光片是一种对不同波段的光具有选择性吸收作用的光学元件. 它由塑料或抛光和镀膜玻璃制成. 一般来说, 红色滤光片只能通过红光. 玻璃的透光率与空气几乎相同, so all coloured light can pass through. But after dyeing, the molecular structure of glass will change, the refractive index will change either, which influence the transmission of certain coloured light. 例如, when a white light passes through a blue filter, it will emit a blue light, while the green light and red light are very few, because they are absorbed by the blue filter.
