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Infrared Camera |
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When we consider infrared technology and infrared Camera and its advances, FLIR infrared and Infrared photography are widely used in the scientific, research and other fields for a long time now. An infrared camera, sometimes called a FLIR (Forward Looking InfraRed), or a thermographic camera more specifically, is a device that forms an image using infrared radiation, similar to a common camera that forms an image using visible light. But instead of the 450–750 nanometer range of the visible light camera, infrared cameras operate in wavelengths as long as 14,000 nm (14 µm).
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Infrared energy is a part of the electromagnetic spectrum that encompasses radiation from radar, ultra violet, x-rays, gamma rays, infrared, a thin region of visible light, and radio waves. These spectrum vary in the length of their wave (wavelength). All objects emit a certain amount of black body radiation as a function of their temperatures. The higher an object's temperature is, the more infrared radiation it emits. Images from infrared camera are mostly monochromatic because the cameras are generally designed with only a single type of sensor responding to single wavelength range of infrared radiation. These monochromatic images are sometimes displayed in pseudo-color, where changes in color are used rather than changes in intensity to display changes in the signal. Human ability to see fine intensity differences in bright areas is fairly limited and this technique is called density slicing.
For use in temperature measurement the brightest (warmest) parts of the image are customarily colored white, intermediate temperatures reds and yellows, and the dimmest (coolest) parts blue. A scale is shown next to a false color image to relate colors to temperatures. Their resolution is considerably lower than of optical cameras, mostly only 160 x120 or 320 x 240 pixels. Thermographic camera ( infrared camera ) are of two kinds, cooled infrared image detectors and uncooled infrared image detectors.
Thermal imaging photography has many uses. Though developed for military use during the Korean War, thermographic cameras have slowly migrated into other fields as varied as medicine and archeology. Lowering of prices has also encouraged adoption of infrared viewing technology. Uses include Astronomy, Firefighting operations, Military and Police, law enforcement and anti-terrorism, Predictive maintenance or early failure warning of mechanical and electrical equipment, Process monitoring and Condition Monitoring and surveillance.
More applications of an infrared camera include Automotive applications, Energy auditing of building insulation and detection of refrigerant leaks, Roof inspection, Auditing of acoustic insulation for sound reduction, Masonry wall structural analysis, Moisture detection in walls & roofs, Chemical imaging, Medical testing for diagnosis, Nondestructive testing, Quality control in production environments, Research and development of new products, Pollution effluent detection, Locating of unmarked graves, aerial archeology, paranormal investigation, Search and rescue operations, Technical Surveillance Counter-Measures and Quarantine monitoring of visitors to a country
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