The invention discloses a micro light filter which is set in the slug of the mercury-cadmium-telluride infrared detector. The detector slug is made up of the underlay, the buffer layer, the photodiode embattle which is respond to the infrared target radiation. The micro light filter is extended between the buffer layer and the photodiode embattle. So it has the advantage of high uniformity, high reliability and no signal loss; the filtering band is reached by controlling the composition of the Hg1-xCdxTe; also it doesn't need any external light path parts. |