Essential Information & explanations, latest texts & monographs on
Infrared.
Creative Photo Printmaking by Theresa Airey
The Art of Infrared Photography by Joseph Paduano
Infrared System Engineering by Richard D. Hudson
Infrared Photography Handbook by Laurie White
Infrared Detectors and Systems by E. L. Dereniak
Fundamentals of Infrared Detector Operation and Testing by John David Vincent
Applied Infrared Photography by Eastman Kodak
Common Sense Approach to Thermal Imaging (SPIE PRESS Monograph Vol. PM86) by Gerald C. Holst
Infrared Handbook (With CD-ROM) by George J. Zissis
Modern Infrared Spectroscopy by Barbara H. Stuart
Alien Vision: Exploring the Electromagnetic Spectrum with Imaging Technology (SPIE PRESS Monograph Vol. PM104) by Austin Richards
Practical Applications of Infrared Thermal Sensing and Imaging Equipment, Second Edition (Tutorial Texts in Optical Engineering Vol. TT34) by Herbert Kaplan
Near-Infrared Spectroscopy : Principles, Instruments, Applications by Heinz W. Siesler
Build Your Own Working Fiberoptic Infrared, and Laser Space-Age Projects by McGraw-Hill/TAB Electronics
Invisible World of the Infrared by Jack R. White
Infrared
Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation. The name means "below red" (from the Latin infra, "below"),
red being the color of visible light of longest wavelength. Infrared radiation has wavelengths between 700 nm and 1 mm.
IR is often subdivided into near-IR (NIR, 0.7-5 µm in wavelength), mid-IR (MIR (also intermediate-IR (IIR)), 5 - 30 µm) and far-IR (FIR, 30 - 1000 µm). However, these terms are not precise, and are used differently in various studies. Infrared radiation is often linked to heat, since objects at room temperature or above will emit radiation mostly concentrated in the mid-infrared band (see black body).
Uses
Infrared is used in night-vision equipment, when there is insufficient visible light to see an object. The radiation is detected and turned into an image on a screen, hotter objects showing up brighter, enabling the police and military to chase targets.
Smoke is more transparent to infrared than to visible light, so fire fighters use infrared imaging equipment when working in smoke-filled areas. Fire fighters also use this equipment in wood-frame buildings after a fire has been extinguished to look for hot spots behind the walls, where a fire can break out again.
A more common use of IR is in television remote controls. In this case it is used in preference to radio waves because it does not interfere with other devices in adjoining rooms - this is especially important in areas of high population density (IR does not penetrate walls). IR data transmission is also employed in short-range communication among computer peripherals and personal digital assistants. These devices usually conform to standards published by IrDA, the Infrared Data Association. Remote controls and IrDA devices use infrared light-emitting diodes (LEDs) to emit infrared radiation which is focused by a plastic lens into a narrow beam. The beam is modulated, i.e. switched on and off, to encode the data. The receiver uses a silicon photodiode to convert the infrared radiation to an electric current. It responds only to the rapidly pulsing signal created by the transmitter, and filters out slowly changing infrared radiation from sunlight, people and other warm objects.
The light used in fiber optic communication is typically infrared.
History
In 1800 the English astronomer William Herschel held a mercury thermometer in the spectrum produced by a glass prism to measure the heat content of different coloured lights. He found that the thermometer registered an increase in temperature even when held beyond the red end of the spectrum, where there was no visible light. This was the first experiment to show that heat could be transmitted by an invisible form of light.
Electromagnetic Spectrum
Radio waves | Microwave | Infrared | Visible light | Ultraviolet | X-ray | Gamma ray
Visible: Red | Orange | Yellow | Green | Blue | Indigo | Violet
The above article is adapted from from Wikipedia All Wikipedia article text is available under the terms of the GNU Free Documentation License
Updates and comments at Essential Facts blog
World Class Photographers
Some philosophical movements
|
|
Interesting Links
Latest Dowloadable
Infrared PDF s & Ebooks
Top PDF and eBook Downloads
Bibliographic Resources
Dates
20-th Century
20-th Century Details
Chromosomes and Genomics
Sports
Kitchen Knowledge
Hollywood Icons
Classical Music
Music Directory.
Music: Jazz
Music: Rock
Music: Country
Music: Popular A-E
Music: Popular F-L
Music: Popular M-S
Music: Popular T-Z
Mythology
Philosophy
Politics
Retirement
Agriculture
Agriculture: Flowers
Agriculture: Gardening
Biology
Biology & Biologists
Cell Science
Cell Science: Cells
Cell Science: Stem Cells
California
Cats & Dogs
Ethics
Electronics
Logic
The Greats
Architectural Dates & Places
Styles ABC
Styles DTOI
Styles JTON
Styles OTOZ
Buddhism
Marketing
Psychology
Enginering Systems 1
Mathematics
Classic Authors
Fear No Exams
Characters & countries
Law & Legal Topics
Linguistics
Movies
Most successful Movies
Science Plus
Science & Computers
Quantum Theory
|