The pandemic raged this year. People stayed at home under quarantine during the Spring Festival, and later the epidemic was brought under control. Enterprises resumed production and schools reopened, and people stepped out of their homes. To prevent the spread of the pandemic, non‑contact temperature‑sensing solutions were widely deployed for body‑temperature screening at transportation hubs such as railway stations, metro stations, airports, wharves and passenger terminals, as well as in crowded venues including hospitals, shopping malls and workplaces. The device used for temperature detection is infrared thermal imaging. Some people may wonder: does infrared thermal imaging produce radiation? Below we have compiled relevant information for your reference.

1. Infrared thermal imaging passively picks up infrared signals emitted by objects and does not emit radiation itself. Any object above absolute zero radiates infrared signals. An infrared detector captures these signals and converts them into thermal images.
2. All objects with a temperature higher than absolute zero (-273 °C) emit infrared radiation. Infrared thermal imaging employs infrared detectors and optical imaging objectives to capture the infrared‑radiation‑energy distribution of measured targets and project it onto the photosensitive elements of infrared detectors to generate infrared thermograms corresponding to the thermal‑distribution field on object surfaces. Infrared thermal imaging cannot penetrate walls.
3. Its temperature‑measurement principle relies on passively receiving infrared radiation emitted by objects for imaging and temperature reading. Since every object above absolute zero (-273.15 °C) gives off infrared radiation, taking body‑temperature measurements with infrared thermal imaging does no harm to the human body.
4. Far‑infrared thermal‑imaging diagnosis generates no rays and requires no tracer drugs. It merely detects excessive hot‑spot areas on the human body. Accordingly, it inflicts no harm on people, causes no environmental pollution, and is convenient and cost‑effective.

That concludes today’s sharing on infrared thermal imaging. We believe you now understand that infrared thermal imaging emits no radiation and is harmless to human beings.