colour filter

British  

noun

1. photog a thin layer of coloured gelatine, glass, etc, that transmits light of certain colours or wavelengths but considerably reduces the transmission of others

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Example Sentences

But its key innovation is that its pixels are arranged in groups of four, with each set sharing the same colour filter to detect red, green or blue light.

From BBC

Users can jump to any particular time since the SDO launched in 2010, select a colour filter and retrieve the data.

From Nature

In 2012 they re-examined a small part of the centre of the HUDF, this time with an additional colour filter and a time exposure totalling about 23 days.

From Nature

Elmer was very much engaged in photographing flowers from nature through the ruled screen and colour filter—in experimenting with the Elmer process, in fact; by which the intermediate stage of a coloured negative is rendered unnecessary.

From Project Gutenberg