INFRA RED

Infrared Light is electromagnetic radiation with a wavelength between 0.7 and 300 micrometers. They are longer than that of visible light but shorter than that of terahertz radiation microwaves. IR is used in the security system as because Human at normal body temperature radiate chiefly at wavelength around 12 micrometer s. An infrared camera is an ideal product for anyone needs to capture images in the dark for work or for the purpose of security and surveillance.

A regular camera can become an infrared camera with the use of infrared illuminators. The illuminator lights the area under surveillance with infrared light so that that your regular camera can record black and white images with the use of infrared radiation, which the naked eye cannot see.

Certain systems IR systems require active infrared illumination; these systems usually operate in the NIR (Near Infrared) region of the spectrum. The active IR illumination could then be detected by an enemy, if that enemy were equipped with similar equipment. However, MWIR (Mid-Wave Infrared) and LWIR (Long-Wave Infrared) detectors do not require active illumination of any sort; these detectors are sensitive enough to detect the energy emitted from human or vehicle targets. Since there is no active illumination used with these systems, they are undetectable by an enemy.

HOW IT WORKS:

Since an IR imager is sensing light in a different part of the spectrum from what our eyes can see, the term “color” has no meaning. All IR cameras actually image grayscale intensities, i.e, a measure of the “brightness” of the image. Some imaging systems then apply ‘false coloring’ to the image, to help the user interpret the relative ‘temperature’ of the infrared image.

Infrared imaging’, like visual imaging, is the collection, recording, and displaying of light from a scene. However, ‘infrared’ refers to light with longer wavelengths than that of visual light. Infrared imaging is also referred to as thermal imaging; these terms are taken to be identical. Infrared thermal imaging shows the thermal patterns emitted from, or reflected off of a target, and as such, it does not require visual light.