800nm-2500nm High Transmittance Filter Infrared Infra-Red 808nm 850nm980nm Infrared Filter (Round : 25 x 2mm)

The role of optical filters: the role of filters is very large, widely used in photography. In some landscape paintings taken by master photographers, why are the main scenes so prominent and how do they do it? It is because the filter is used. For example, if you want to take a picture of a yellow flower with a blue sky and green leaves in the background, if you follow the usual picture, you cannot highlight the theme of the yellow flower because the image of the "yellow flower" is not prominent enough. However, if a yellow filter is installed in front of the lens, it will block the green light emitted by some green leaves. The blue light emitted by the blue sky and the yellow light emitted by the yellow flowers pass through in a large amount, so that the yellow flowers are very obvious. Highlight the theme of yellow flowers.

• 808nm850nm980nm infrared filter, 800nm-2500nm high transmittance, visible light cut off;
• Filter: It is an optical device used to select the required radiation band. One of the common characteristics of filters is that there is no filter to make the image of celestial bodies brighter, because all filters absorb certain wavelengths, which makes the object darker. Optical filters are very useful and are widely used in photography.
• The filter is made of plastic or glass with special dyes. The red filter can only let red light pass through, and so on.
• The refractive index of the glass sheet is originally similar to that of air, so the colored light can pass through, so it is transparent, but after dyeing the dye, the molecular structure changes and the refractive index also changes, and the passage of some colored light changes, such as A beam of white light passes through the blue filter and emits a beam of blue light, while green light and red light are very few, and most of them are absorbed by the filter.
• Can be used in multi-touch, interactive projection, and ball game products;