Skip to main content

INFRARED TECHNOLOGY: PRINCIPLES AND APPLICATIONS

What is INFRARED? 
Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometres (µm), and extending conventionally to 300 µm. These wavelengths correspond to a frequency range of approximately 1 to 400 THz,[1] and include most of the thermal radiation emitted by objects near room temperature. Microscopically, IR light is typically emitted or absorbed by molecules when they change their rotational-vibrational movements. continue..


The light we see with our eyes is really a very small portion of what is called the "Electromagnetic Spectrum." The Electromagnetic Spectrum includes all types of radiation - from the X-rays used at hospitals, to radio waves used for communication, and even the microwaves you cook food with.

Radiation in the Electromagnetic Spectrum is often categorized by wavelength. Short wavelength radiation is of the highest energy and can be very dangerous - Gamma, X-rays and ultraviolet are examples of short wavelength radiation. Longer wavelength radiation is of lower energy and is usually less harmful - examples include radio, microwaves and infrared. A rainbow shows the optical (visible) part of the Electromagnetic Spectrum and infrared (if you could see it) would be located just beyond the red side of the rainbow.continue..

Sir William Herschel, an amateur astronomer famous for the discovery of Uranus in 1781, discovered infrared in the early 19th century. Herschel was familiar with Newton’s discovery that sunlight could be separated into its separate chromatic components via refraction through a glass prism. Herschel hypothesized that the colors themselves might contain different levels of heat, so he devised an experiment to test his theory. Herschel passed sunlight through a glass prism to create a spectrum (the rainbow created when light is divided into its color components) and measured the temperatures of the different colors. He used three thermometers with blackened bulbs and placed one bulb in each color while the other two were placed outside the spectrum as controls. continue..

Infrared thermography is one of many nondestructive testing methods of measuring and mapping surface temperatures. It has been proven to be effective, convenient and economical techniques to analyze concrete. It has also been proven as accurate, repeatable and don't have to disturb the public while the testing is going on.This method is used to test cracks or defective parts of a building or any technical problems that may cause inconvenience of harm once the damage progresses. It can be performed during daytime or night depending on the environmental situations and needed results.continue..

Night Vision
Infrared can be used to amplify light in a low-light situation to enable video recording and image capturing.
Thermography
Thermography uses infrared technology to determine the relative temperature of objects by detecting the amount of radiation they are producing.
Tracking Technology
Infrared can be used in tracking technology; objects, commonly missiles, can be sent to follow a target based on their infrared radiation.continue..

The greatest advantages of infrared are being able to use your own receiver with public transmitters (like in movie theatres) and getting the best sound reproduction. Because of their superior sound reproduction, they are often used movies, plays and musical productions. They may not be the best system for profound hearing losses as they lack the acoustic output (loudness) of FM systems. On the other hand, they also present less risk of injury.continue..
Labels:

Comments

Post a Comment

Popular posts from this blog

FRUITS AS BATTERY AND SOURCE OF ELECTRICITY

Electric Fruits Project   The purpose of this project was to find out which fruit would generate enough electricity to light a light bulb and to discover which fruit would light the bulb the longest. To conduct my experiments I used a Multimeter, copper and zinc wires & electrodes, alligator clips with leads, various light bulbs and five types of fruits. continue.. Why Do Citrus Fruits Produce Electricity?   In order to generate electricity, there must be a power source and a complete circuit. When using a citrus fruit to create electricity, these rules still apply. In a simple experiment using a citrus fruit, the components of the circuit include: a lemon or other fruit, wire, two different metal elements and a small light bulb. The lemon in this circuit serves as the battery and power source. continue.. Fruit Power Project   Purpose To demonstrate how an electrical current can be generated using citrus fruits (such as lemons or limes) that is strong enough to power a small
2 comments
continue

ELECTROCUTION: ELECTRIC ACCIDENT THAT CAN BE AVOIDIED

Electrocution   Electrocution is a type of electric shock that, as determined by a stopped heart, can end life. Electrocution is frequently used to refer to any electric shock received but is technically incorrect; the choice of definition varies from dictionary to dictionary. However, in the vernacular, the term electrocution is used to mean: death, murder or a sudden accident caused by an electric shock. deliberate execution by means of an electric shock, such as an electric chair; the word "electrocution" is a portmanteau for "electrical execution".. continue.. Electric Shock   Electric Shock of a (human) body with any source of electricity that causes a sufficient current through the skin, muscles or hair. Typically, the expression is used to denote an unwanted exposure to electricity, hence the effects are considered undesirable. The minimum current a human can feel depends on the current type (AC or DC) and frequency. A person can feel at least 1 mA (rm
3 comments
continue

POWER SYSTEMS LOSS.COM: LOSSES IN ELECTRICAL SYSTEM

What is powersystemsloss all about?    System's loss reduction is now one of the most growing trends in every electric distribution utility. Primarily triggered by economics and regulation concerns, Transmission and Distribution companies now sets more focus in reducing losses and become as an efficient utility as possible in delivering power. Information found in this site will be very useful not only to electrical practitioners but it is also our goal to help students better understand the actual world. Thank you and lets all enjoy learning! continue..   Back to basic    n case you don't know, the power we get from our household electrical outlet didn't just appear in the thin air. It may appear that it is coming out from our walls but we all know that looks can be deceiving. Before reaching our respective homes, electric current passes through miles and miles of conductors. W
Post a Comment
continue