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What is Infrared

Encyclopedia of Healthcare Information Systems
Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. It is used in night-vision equipment when there is insufficient visible light available.
Published in Chapter:
The Detection of Abnormal Breathing Activity by Vision Analysis in Application to Diagnosis of Obstructive Sleep Apnea
Ching Wei Wang (University of Lincoln, UK), Amr Ahmed (University of Lincoln, UK), and Andrew Hunter (University of Lincoln, UK)
Copyright: © 2008 |Pages: 9
DOI: 10.4018/978-1-59904-889-5.ch053
Abstract
Obstructive Sleep Apnea is increasingly seen as a common and important condition, contributing to sleep disturbance and consequential daytime sleepiness. This has potentially serious consequences for the individual, employers, and society as a whole. Apnea refers to short spells when breathing stops. In obstructive sleep apnea, the throat constricts during sleep, preventing breathing; the apnea episode often ends with a loud snore and/or gasp. Such an event is sufficient to open the throat muscles to allow breathing, and the patient usually falls asleep again so quickly that the event is not remembered. This cycle repeats itself throughout the night as the muscles relax and the throat blocks again, and the frequency of the episode is used to determine the severity of the syndrome.
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More Results
Sensors in Assistive Technology
Infrared light is a form of electromagnetic waves. Infrared can be visible light or can be in the form of microwaves. In its visible form, infrared can be seen as red or violet. Visible infrared waves are very short, measuring about 750 nm in length.
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