Is it true that infrared filters can be used to see through when shooting? What is the principle?

When it comes to infrared photography, many people will associate it with the one-sided propaganda of "perspective" cameras in many media. In fact, neither digital DV, DC nor infrared filters have any perspective function.

What really has magical perspective is infrared. First, infrared rays pass through the first layer of material and reflect on the second layer of material below, and then pass through the first layer of material again. At this time, the first layer of material is translucent visually, which is the so-called perspective phenomenon. Then use related equipment to shoot the existing effects.

The wavelength of infrared ray is higher than that of visible light, and it can easily penetrate some thinner substances that visible light cannot penetrate, such as chemical fiber fabric, plastic, brown glass, paint, dust, smoke and so on. These characteristics are widely used in military, scientific research, ecology, fire protection, medicine, public security and many other fields.

It should be mentioned that it is forbidden by law and morality to use infrared features to shoot against the rights and interests of others. Photography lovers should remember not to shoot infrared in public or in front of people who don't know, so as not to inadvertently cause personal injury to others and bring unnecessary trouble to themselves.