Can the infrared camera see through?

Light must be transparent, at least part of it can be transparent, and the opaque part will be refracted or reflected. People's eyes can see because of the stimulation of light. Of course, many lights are invisible to human beings.

Among the infrared rays, there is a kind of near infrared ray, which can penetrate people's clothes, reach people's skin, and then reflect, which provides a theoretical basis for using infrared cameras to see through people's clothes and other objects.

General cameras are optical cameras, which can only capture visible light. There is a thermal imaging camera, which can capture infrared light with a lower frequency than visible light, and can also capture a general outline in the dark.

Extended data

The reason why an infrared camera can see objects in the dark is that it can sense all light (visible light, infrared light, ultraviolet light, etc.). ) and photosensitive element CCD, and convert them into images that we can see with the naked eye.

During the day, this characteristic causes the image taken by the camera to be inconsistent with the image seen by our naked eyes. In order to solve this problem, an ICF infrared filter is installed between the camera lens and the CCD to block infrared and ultraviolet rays from entering the photosensitive element CCD, so that the CCD can only perceive visible light, so that the image seen is the same as that seen by our naked eyes.

In fact, visible light can also penetrate, for example, in summer, when clothes are very thin, you can see the underwear below through clothes. Infrared rays are similar, prevention is similar to dressing in summer, and the restrictions are the same. The cloth is thick and impenetrable, so it is difficult to penetrate without close fitting. If the curtains are basically airtight for shading, people will be seen at most, and they will not be clear if they are far away.

Baidu encyclopedia-infrared camera