Infrared
(IR) Radiation
Infrared radiation has wavelengths from 700 nm
to 1mm and is characterized by smaller bands.
IR-A (near infrared) is the spectral
region from 701 to 1400 nm
IR-B includes wavelengths from 1.4
to 100 m m.
IR-C spectrum is from 0.10 to 1 mm.
Sources of IR:
Radiative heat
is the main source of IR which includes fires and open flames, stoves,
electrical heating elements and certain lasers.
Hazards:
IR-A passes through the lens of the
eye to the retina or is refracted from other tissues.
High energy levels can cause a
variety of eye disorders, among which is scotoma. Scotoma is loss of vision in a portion of the visual field
resulting from damage to the retina where radiation is absorbed.
Other disorders are simple
reddening, swelling of the eye or lesions.
Extended exposures to IR can cause
cataracts.
High level of IR heat can also cause
ignition of the materials.
Controls:
Limit the duration of exposure
Use a shield
Use eyewear that absorbs and reduces
the amount of infrared reaching the eye
Lenses in glasses, goggles or face
shields must have the correct shade to reduce the harmful effects of IR.
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Last Update:
By: Serdar Z. Elgun