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滤光片(Filter) 滤光片是对光有选择性吸收(或反射)的光学元件。一般说来,任何带色透明薄片均可视为滤光片,而摄影中使用的滤光片,要求具有一定的光谱透射特性和光学质量。
Filter A filter is an optical element that selectively absorbs (or reflects) light. In general, any colored transparent sheet can be regarded as a filter, while the filter used in photography requires a certain spectral transmission properties and optical quality.