Colored Glass Filters
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Color filters are flat glass or gelatin sheets of various colors with a transmission bandwidth of hundreds of Angstroms. They are mostly used in broadband photometry or installed in stellar spectrograph to isolate overlapping spectral levels.
Its main feature is that the size can be made quite large.
The color filter is mainly used for stage lamp decoration. It has a wide variety of colors, such as red, yellow, green and blue. The colors are bright and uniform. One of its remarkable characteristics is the absorption of light, especially the selective absorption of light with specific wavelength.
