Energy infrared

Thermography is a predictive maintenance technique that can be used to monitor the condition of plant machinery, structures and systems. It uses instrumentation designed to monitor the emission of infrared energy, i.e. temperature, to determine their operating condition. By detecting thermal anomalies, i.e. areas that are hotter or colder than they should be, an experienced surveyor can locate and define incipient problems within the plant. 

Infrared (IR) spectroscopy (Section 12.6) A kind of optical spectroscopy that uses infrared energy. IR spectroscopy is particularly useful in organic chemistry for determining the kinds of functional groups present in molecules. 

Carbon dioxide absorbs infrared energy during bending or stretching motions that are accompanied by a change in dipole moment (from zero). Which of the transitions pictured in Fig. 2b... 

Luckiesh, M. Applications of Germicidal, Erythemal, and Infrared Energy D. Van Nostrand New York, 1946. 

Fig. 1 A portion of the electromagnetic spectrum comparing infrared energy with other forms of radiation.

The various combustion methods differ primarily in the method of measuring the carbon dioxide generated from the organic carbon. The first really sensitive carbon dioxide detector and the one still most used is the non-dispersive infrared gas analyser. The detecting element senses the difference in absorption of infrared energy between a standard cell filled with a gas with no absorption in the infrared, and a sample cell. Water vapour is the only serious interference, hence the carbon dioxide must be dried before any measurements are made. 

Thus the absorption of infrared energy by solids is an approximation of the Beer-Lambert exponential law for transmission ... 

Infrared radiance is the amount of infrared energy primarily emitted by the quartz envelope of the UV source. This energy is collected and focused with the UV energy on the surface of the substrate to the extent depending on the IR reflectivity and efficiency of the reflector. Infrared radiafion can be expressed in exposure or irradiance units, but most commonly, the surface temperature it generates is of primary interest. The heat it produces may be a benefit or a nuisance. ... 

Electromagnetic spectrum The full-wavelength range of electromagnetic radiation, including microwave, ultraviolet, visible, and infrared energy. 

Atmospheric carbon dioxide, water vapor, and other select gases absorb and reemit much of this infrared energy back to the ground, as Figure 17.23 illustrates. This process, called the greenhouse effect, helps keep Earth warm. The greenhouse effect is quite desirable because otherwise Earth s average temperature... 

Glass acts as a one-way valve, letting visible light in and preventing infrared energy from exiting. 

Greenhouse effect The process by which visible light from the sun is absorbed by the Earth, which then emits infrared energy that cannot escape and so warms the atmosphere. 

The number of vibrational modes of a molecule composed of N atoms is 3N — 6 (or 3N — 5 if linear). We may find which of these are infrared and Raman active by the application of a few simple symmetry arguments. First, infrared energy is absorbed for certain changes in the vibrational energy levels of a molecule. For a vibration to be infrared active, there must be a change in the dipole moment vector... 

Figure 2. Common components of basic infrared detection systems. The illustration shows examples of three typical infrared energy inputs.

To capture the infrared energy, low band gap or NIR-absorbing organic columnar mesophase LC semiconductors are urgently needed for PVCs. NIR materials have potential applications for telecommunications, thermal imaging, and biological imaging. 

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