infrared

(redirected from Far-infrared)
Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.

infrared

 [in″frah-red´]
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.

in·fra·red (IR, ir),

(in-fră-red'),
That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm.

infrared

/in·fra·red/ (-red´) denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, having wavelengths of 0.75–1000 μm; sometimes subdivided into long-wave or far i. (about 3.0–1000 μm) and short-wave or near i. (about 0.75–3.0 μm).

in·fra·red

(in'fră-red)
That portion of the electromagnetic spectrum with wavelengths between 770-1000 nm.

infrared

the electromagnetic radiation in the region between red light and radio waves. see ELECTROMAGNETIC SPECTRUM.

infrared (IR) (inˑ·fr·redˈ),

n electromagnetic radiation of longer wavelength than red light in the range of 730 nanometres (nm) to about 1 millimetre (mm).

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.

infrared

denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, having wavelengths 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 10 mm. 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.
References in periodicals archive ?
This paper presents experimental data showing that an instrument based on far-infrared (FIR) radiation can overcome some of the drawbacks of the existing methods and test much thicker material.
However, it is necessary to investigate the surface conditions to verify the relationship between the carbonizing temperature and the far-infrared ray emission properties because the far-infrared emission generally shows different properties with respect to the surface conditions of the specimen.
JNH Lifestyles' products are all sorted into Store, which provides an overview of its entire inventory; Saunas, which focuses exclusively on its far-infrared saunas and accessories; and Heaters, which showcases its indoor and outdoor heater selection.
The expansion of the universe shifts the far-infrared radiation from distant galaxies to longer, submillimeter wavelengths.
Herschel's far-infrared eyes can also seek out regions of gently heated gas and dust further from W44, where new stars are congregating.
By staring into the far reaches of space through a small, relatively dustfree region of our galaxy, ISO has found 30 far-infrared point sources.
A vital part of the collaboration is a far-infrared spectrometer, the German Receiver for Astronomy at Terahertz Frequencies (GREAT).
Herschel is considerably larger than NASA's Hubble, and operates at far-infrared wavelengths.
This team's maps show a similar far-infrared background, Hauser says.
The new far-infrared view from Herschel shows how the star's winds are crashing against the surrounding interstellar medium, creating a bow shock as the star moves through space at speeds of around 30 km/s.
In order to make such sensitive far-infrared observations, the detectors of the three science instruments - two cameras/imaging spectrometers and a very high-resolution spectrometer - must be cooled to a frigid -271C, close to absolute zero.
An international group of contributors discuss optical parametric and chirped pulse amplification; ultrafast sources and amplifiers; high power fiber, short pulse, and short wavelength fiber lasers; fiber and nonlinear optics; UV and visible sources; ytterbium, neodymium, mid-infrared, and far-infrared lasers; infrared sources; growth, characterization, and spectroscopy; and advanced concepts and novel architectures.