(redirected from Long-wave infrared)
Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.
Related to Long-wave infrared: infrared rays


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 ?
Caption: BAE Systems' innovative sensor blends low-light-level camera covering from full daylight down to starlight situations, with long-wave infrared uncooled thermal (supplied by BAE Systems for weapon sights) image in a single display, thanks to the new Digitally Fused Sensor System (DFSS).
It is known that infrared cameras can see more than the naked eye, but cameras for the long-wave infrared range have the disadvantage that the sensor requires constant cooling, which adds to the cost and complexity of the device.
There is a transition in the submillimeter region in which the distinction between radio waves and long-wave infrared becomes indistinct.
The sight will be a "weapon-mounted long-wave infrared sensor used for surveillance and fire control of individual weapons during daylight, darkness, adverse weather and dirty battlefield conditions," the solicitation said.
The infrared sensing secret of the Sophie family is its Pluton long-wave infrared focal plane assembly which is produced by Sofradir of France, providing detection in the 8-12[micro]m range.