光学フィルターの概要 ——PartⅠ 光学フィルターの定義と動作理論
chancctv2018-09-07T14:34:38+08:00
フィルターは、異なる帯域の光を選択的に吸収する光学素子の一種です。. It is made of plastics or polished and coated glass. Generally, red filters can only pass through red light. The transmittance rate of glass is almost the same with that of air, 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. 例えば, 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.
