Is infrared thermometer harmful to eyes?
At the press conference held by the State Council in response to the joint prevention and control mechanism of the novel coronavirus pneumonia epidemic, Feng Luzhao, a researcher from the China Center for Disease Control and Prevention, responded to the question of whether the infrared thermometer is harmful to human body. The working principle of the infrared thermometer is to focus the infrared ray thermal radiation of human body on the detector, which will convert the radiation power into electrical signals, which will be displayed in temperature units after the ambient temperature is compensated.
So, the infrared thermometer does not emit infrared radiation to the human body, but receives the infrared thermal radiation emitted by the human body, so it is not harmful to the eyes and body, "Feng Zhaolu said.
Is an infrared thermometer harmful to the eyes?
Experts have stated that the infrared temperature measurement ceremony LED light emits infrared radiation that illuminates the head, not the eyes, during measurement. Only by directly irradiating the eyes with infrared radiation for a long time can it cause damage to the crystalline lens and retina. However, the probability of such damage caused by an infrared thermometer is almost zero.
Can infrared radiation really damage the eyes?
If the intensity of infrared radiation is high, it can cause certain irritation and damage to the eyes, and in severe cases, it can lead to cataracts, retinal damage, and even blindness. Infrared radiation with a wavelength less than 1.5 microns will be absorbed by the eyes to a certain extent. If the infrared radiation directly shines on the eyes, it may cause related reactions in the liquid in the eyeball, leading to some eye diseases. Infrared thermometers are not used to emit infrared radiation, but only for positioning. They rely on the heat emitted by the human body to measure. Please feel free to use infrared thermometers during the epidemic.
