Breaking the Mystery behind Light?the Near-Infrared Experience
Article by George Melcher
Breaking the Mystery behind Lightthe Near-Infrared Experience ? Business ? Industrial Mechanical
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Near-infrared (NIR) is a type of invisible light within the infrared region of the electromagnetic spectrum. Of the three spectral regions of infrared light-NIR, mid-infrared, and thermal-infrared-NIR is the closest to the visible light and with a shortest wavelength. This because the farther the light is from the visible spectral region, the wider its wavelength becomes.
Compared with other forms of IR, NIR can penetrate matter better, allowing it to discover more vital information. The method of using infrared to study the properties of matter, whether here on Earth or in the outer space, is called NIR spectroscopy (spectroscopy being the study of the interaction of matter and radiated energy). This method is applied in various industrial and pharmaceutical applications, such as food and agrochemical quality control, functional neuroimaging, and medicine production.
Instrumentation is necessary for NIR to be optimally used in spectroscopy. Typical applications require a source of light, a detector to record the information, and a dispersive element to enable recording of the intensity of penetration at different wavelengths. The most common NIR sources used for analytical applications include light-emitting diodes and quarts halogen light bulbs.
When NIR penetrates a substance, say, the human skin, it detects various information that are invisible to the human eye, such as hemoglobin and blood sugar concentration. Instead of slashing open the skin to get samples of tissues, NIR spectroscopy aids the process and provides even more accurate data. The principle applied is similar with that of using X-ray to detect bone fractures. NIR can also be used to determine body temperature.
In astronomy, NIR technology allows astronomers to look beyond the visible universe. Since NIR has a larger wavelength than visible light and the light?s wavelength is inversely proportional to the heat of an object, NIR can view cooler objects in the outer space that typical telescopes cannot detect. Even stars hidden by hot dust and gases can be detected using an NIR spectrometer.
NIR has various industrial uses, such as measuring particle sizes and analyzing gas properties. In particle measurement, the NIR emitted by a source penetrates a pile of powder to measure the size of each particle accurately. This is not possible using traditional gauging devices.
For more information about NIR, including NIR applications that require proper NIR training, check out nearinfrared.com. This website is owned by a research corporation that conducted actual experimentation on NIR and its uses. It provides information you can use in your research.
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George Melcher
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If you have questions, please visit us at http://www.Foss-NIRSystems.com for complete details and answers.
Use and distribution of this article is subject to our Publisher Guidelines
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