Can ordinary surveillance cameras see people clearly at night?

At night, you can get a clear face without the effect of lighting.

If it is not an infrared camera, you can't see people without lights. Only the high-speed spherical camera with infrared illuminator has the function of night watch. The infrared spherical camera can be imaged by the infrared light emitted by the infrared lamp on the high-speed ball without light, and can also be monitored without light.

Depending on the type of infrared lamp selected, the actual infrared irradiation distance can be as large as 30 meters to 20 meters. At present, the infrared illumination of infrared spherical camera is divided into many kinds, mainly including LED infrared lamp, array infrared lamp, laser infrared lamp, argon external lamp, lattice infrared lamp and so on.

Influence of infrared camera on human body;

As long as the temperature of an object is higher than the absolute temperature (-273℃), molecules and atoms will move irregularly, and their surfaces will continuously radiate infrared rays. Infrared ray is an electromagnetic wave with a wavelength range of 0.78~ 1000μm, which is invisible to human eyes and can reflect the infrared radiation field on the surface of an object, that is, the temperature field.

The infrared energy radiated by an object is different at different temperatures. The higher the temperature, the greater the infrared energy radiated.

Infrared ray is a kind of thermal radiation, which will cause high temperature damage to human body, and strong infrared ray will also cause skin damage, similar to scald. The infrared camera only records the infrared rays emitted by the object, and the camera itself does not emit infrared rays, so it is generally harmless to the human body.