Goria Shiva, a Facebook user, published a post in a group called “კორონა მაფია” (Corona mafia) on September 2, protesting the planned school regulations in the light of the COVID-19 pandemic and called on parents to refuse the thermal imaging of their children. Another member, Madlena Barabadze, published a second post on June 2, claiming that the laser radiation of the non-contact thermometers was hazardous.
The claim that the thermal imaging emits radiation and is harmful for health, is false. 1. The non-contact measures the infra-red radiation of the body to find out its temperature, it does not emit radiation. 2. Some thermometers use a laser ray to facilitate aiming for the sensor, but it does not involve infra-red radiation and is not harmful for humans.
1. The non-contact measures the infra-red radiation of the body to find out its temperature, it does not emit radiation.
The non-contact thermometers measure the infra-red radiation of the body and converts it to degrees, which are then shown on its display. The mechanism of such thermometers includes taking in and identifying the infra-red radiation and does not emit any kind of radiation itself.
It is noteworthy that any object, living or not, has infra-red rays. They are electromagnetic rays, invisible to the eye.
How does the non-contact thermometer work?
Main components of the non-contact thermometer are the lens, the detector, and the screen. The lens directs the radiation of the body to the detector, while the sensor converts the infra-red energy to an electronic impulse, which is then shown on the display in degrees.
2. Some thermometers use a laser ray to facilitate aiming for the sensor, but it does not involve infra-red radiation and is not harmful for humans.
Some non-contact thermometers point to the human body with a laser ray. However, this does not contain any infra-red radiation. The laser is an artificially shortened rays of light. The thermometer uses it in limited amounts and it is not harmful for the health.
The non-contact thermometer uses the laser ray to facilitate aiming for the sensor, so that the latter can recognize the surface of the object which is to be measured.
The disinformation that the non-contact thermometer is harmful for the health, is being actively disseminated in various countries against the background of the COVID-19 pandemic. Fact-checking organizations, such as Poynter and Associated Press have verified this information. Different versions of the fake news about the non-contact thermometers have been disseminated. Claims from different periods and countries held that thermal imaging damages eyesight, nervous system, and epiphysis of the brain.