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denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, i.e., of 0.75–1000 μm. Infrared rays are sometimes subdivided into long-wave or far infrared (about 3.0–1000 μm) and short-wave or near infrared (about 0.75–3.0 μm). They are capable of penetrating body tissues to a depth of 1 cm. Sources of infrared rays include heat lamps, hot water bottles, steam radiators, and incandescent light bulbs. Infrared rays are used therapeutically to promote muscle relaxation, to speed up the inflammatory process, and to increase circulation to a part of the body. See also heat.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·fra·red (IR, ir),

That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm.
Farlex Partner Medical Dictionary © Farlex 2012


That portion of the electromagnetic spectrum with wavelengths between 770-1000 nm.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


the electromagnetic radiation in the region between red light and radio waves. see ELECTROMAGNETIC SPECTRUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

infrared (IR)

Radiant energy of wavelengths between the extreme red wavelengths of the visible spectrum and a wavelength of a few millimetres. The wave band comprising radiations between 780 and 1400 nm is referred to as IR-A. Excessive exposure to these radiations can cause visual loss (e.g. eclipse blindness) and cataract. The waveband comprising radiations between 1400 and 3000 nm is referred to as IR-B. Excessive exposure to these radiations can cause cataract and corneal opacity. The wave band comprising radiations between 3000 and 1 ✕ 106 nm (or 1 mm) is referred to as IR-C. Excessive exposure to these radiations can cause cataract (heat-ray cataract). See eclipse blindness; absorptive lens; infrared optometer.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
The Middle East & Africa IR detector market is a competitive market with a number of market players with niche technologies.
The global market size of IR detectors from Microbolometers was estimated to be nearly $65 million in 2013 and is estimated to reach $125 million by 2020, at a CAGR of 10% from 2014-2020.
The IR detector technologies enable the systems that help to interact with the outer world without touching it.
An imaging IR detector may be a single sensing element that uses some form of optical scanning to produce a two-dimensional image, a linear array of elements plus one axis of scanning, or a two-dimensional array of sensing elements - the so-called "stating" detector.
Interfacing of the IR detector with the MS normally is performed in a serial mode which provides both IR and MS data from a single injection source.
Because of its versatility and appropriate spectral response, MCT is the most common material used in IR detectors. By varying its composition, alloys of MCT can operate in both near-and mid-IR regions.
The human eye is unable to detect infrared radiation; however an IR detector converts the infrared energy into an electrical signal that generates a temperature value.
“The overall IR detector market is expected to reach $286 million by 2016.
The module couples with any sampling accessory equipped with its own IR detector to create a compact dedicated analyzer.