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Infrared Technology |
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When we look at the History of Infrared Technology we find that in fields such as Infrared Network Technology and Infrared technology and thermography equipment, there have been rapid gains. There are many uses of infrared technology, some simple, some sophisticated but all which seek to exploit the tremendous potential of the infrared wavelength. These are: Infrared filters are made of polysulphone plastic that blocks over 99% of the visible light spectrum from any “white” light source. Infrared filters allow a maximum of infrared output ideal for maintaining covertness. Infrared filters are used in Military, Law Enforcement, Industrial and Commercial applications. All generations of night vision devices are benefited with the use of IR filters. Infrared is used in night vision equipment to see better especially when there is insufficient visible light.
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Infrared technology can be used to remotely determine the temperature of objects (if the emissivity is known). In infrared photography, infrared filters are used to capture the near-infrared spectrum. Digital cameras often use infrared blockers. A technique called 'T-ray' imaging is one of the most useful infrared imaging techniques. T-ray imaging due to a number of new developments such as terahertz time-domain spectroscopy has aroused considerable activites.
Infrared tracking, also known as infrared homing, refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles which use infrared seeking are often referred to as "heat-seekers", since infrared (IR) is just below the visible spectrum of light in frequency and is radiated strongly by hot bodies.
Infrared technology in the form of Infrared radiation is a good deliberate heating source. It is used in infrared saunas to heat the occupants, and also to remove ice from the wings of aircraft (de-icing). Infrared heating is also becoming more popular in industrial manufacturing processes, e.g. annealing, print drying, plastic welding, curing of coatings and forming of plastics,. In these applications, infrared heaters replace convection ovens and contact heating. Efficiency is achieved by matching the wavelength of the infrared heater to the absorption characteristics of the material.
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. In infrared technology, free space optical communication using infrared lasers is an inexpensive way to install a communications link compared to the cost of burying fiber optic cable.
Infrared vibrational spectroscopy can be used to identify molecules by analysis of their constituent bonds. Each chemical bond in a molecule vibrates at a frequency which is characteristic of that bond. The vibrational frequencies of most molecules correspond to the frequencies of infrared light. This can be used to study organic compounds using light radiation of the mid-infrared.
The other very important uses of infrared technology are in meteorology, climatology, astronomy, art history and archaeology, biological systems and study of the earth.
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