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infrared imaging

Detecting infrared radiation. Everything above absolute zero emits infrared radiation, which is also perceived as heat in the far infrared (FIR) range. In normal environments, people and animals emit more infrared than their surroundings, and infrared night vision systems are used to detect objects not easily visible to the naked eye. See infrared.

Night Vision
Increasingly found in luxury automobiles and also available for after-market installation, infrared night vision systems let people see distant objects that would otherwise be invisible. (Image courtesy of FLIR Systems,


An invisible band of radiation at the lower end of the visible light spectrum. With wavelengths from 750nm to 1mm, infrared starts at the end of the microwave spectrum and ends at the beginning of visible light. Infrared transmission typically requires an unobstructed line of sight between transmitter and receiver.

Widely used in most audio and video remote controls, infrared transmission is also used for wireless connections between computer devices (see IrDA) and a variety of detectors (see IR detector).

Infrared Can Be Anything Below Red
Infrared means "below red," and red frequencies are at the bottom of visible light. Therefore, infrared may refer to any type of invisible electromagnetic radiation below visible light, including AM, FM and TV. See infrared imaging, infrared wavelengths, IR remote control and IRED.

Infrared in the Spectrum
The infrared band comes after the microwave range and ends at visible light.

Personal Use Only

Before/After Your Search Term
infotechinfrared LED
infowarinfrared port
infowareinfrared remote control
InfoWindowinfrared wavelengths
infra redinfrasonic
Infranet Initiative Councilinfrastructure as a service
infraredinfrastructure mode
Infrared Data Associationinfringement
infrared detectioninfringer

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