Materials of Infrared Optical Filter Glass china
(1) Made of colored glass, usually black, which absorbs visible light and allows infrared light to pass through. If you look at the sun through this Infrared Optical Filter Glass china, you can still see a red sun. Suitable for infrared imaging.

(2) Infrared Optical Filter Glass China is made by vacuum coating on optical white glass. This type is also called optical cold mirror, which will reflect the visible outside and let visible light pass through. The exterior looks silver, like a mirror.
(3) Infrared plastic filters made of special plastics are generally PMMA and PC materials. The appearance is black, if you look at the sun through this Infrared Optical Filter Glass china, you can also see a red sun.
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