Source: wikibot/interference-filter
= Interference filter
{wiki=Interference_filter}
An interference filter, also known as an optical interference filter or thin-film filter, is a type of optical filter that selectively transmits light of certain wavelengths while reflecting others, based on the principle of interference. These filters are often made up of multiple layers of thin films, typically of different refractive indices, deposited on a glass or plastic substrate.