 - Also see infrared radiation.
Infrared transmission refers to energy in the region of the electromagnetic radiation spectrum at wavelengths longer than those of visible light,
but shorter than those of radio waves. Correspondingly, infrared frequencies are higher than those of
microwaves, but lower than those of visible light.
Scientists divide the infrared radiation (IR) spectrum into three regions. The
wavelengths are specified in microns (symbolized µ, where 1 µ = 10-6 meter)
or in nanometers (abbreviated nm, where 1 nm = 10-9 meter = 0.001 5).
The near IR band contains energy in the range of wavelengths closest to the
visible, from approximately 0.750 to 1.300 5 (750 to 1300 nm). The intermediate
IR band (also called the middle IR band) consists of energy in the range
1.300 to 3.000 5 (1300 to 3000 nm). The far IR band extends from 2.000 to
14.000 5 (3000 nm to 1.4000 x 104 nm).
Infrared is used in a variety of wireless
communications, monitoring, and control applications. Here are some examples:
Home-entertainment remote-control boxes
Wireless (local area
networks)
Links between notebook computers and desktop computers
Cordless modem
Intrusion detectors
Motion detectors
Fire sensors
Night-vision systems
Medical diagnostic equipment
Missile guidance systems
Geological monitoring devices
Transmitting IR data from one device to another is sometimes referred to as beaming.
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| LAST UPDATED: |
18 Apr 2007
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