Each object emits a certain amount of radiation depending on its temperature.
The radiation which adjoins the visible light in direction of larger wavelengths is called infrared or thermal radiation.
This type of radiation was discovered in 1800 by William Herschel.
The wavelength of the infrared radiation is in the range of 780 nanometers to 1 millimeter.

Infrared Radiation in Plastic Industry

General: The area on the right side of the color bar is called infrared radiation. The temperature distribution, of this part production, is being monitored with a camera for infrared radiation (IR-ThermalSystem).

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This glossary of plastic industry is provided by PLEXPERT Canada Inc.