What is IR photography?

Ir Photography is an abbreviation for infrared photography. Infrared photography captures images using infrared radiation, which is invisible to the mere eye and usually undetected by standard cameras. Film cameras achieved IR photographs by employing specialized filters, film or both; Digital cameras can detect infrared radiation, but have built -in devices to neutralize it. Infrared photography creates interesting and sometimes unintended visual effects. One type of infrared photo detects the heat of the subject and displays it visually, a technique called thermography. The human eye can only detect a visible part of this spectrum; Other segments such as radio waves can be detected with the right equipment. The color of the light depends on the wavelength of its radiation, while the longest wavelengths appear red and the shortest appear blue. Infrared radiation exists just behind the red end of a visible spectrum; That's why his name. SpecializedIt can detect this radiation and convert it to a form visible to the human eye.

Film cameras require special filters to take pictures of IR pictures; These lenses seem completely black because they filter all visible light and only detect infrared radiation. Traditional IR photography also included an ir-sensitive film that required special manipulation, as it could be destroyed by infrared radiation in the normal darkroom. Most of the infrared film was interrupted at the beginning of the 21st century. Digital image sensors automatically detect infrared radiation, so digital cameras are usually designed with filters to remove from the image. Digital camera users can practice IR photography through special techniques including long tripod exposures; It is also possible to remove the IR filter, but it is only high for experts.

with wavelength to rThe wave light paction can create some unusual and aesthetically pleasant effects. For example, the visible light of the scattering and not infrared radiation, so an infrared photo can create a bright picture for foggy days. It seems that leaves and grass shine, a phenomenon called a wooden effect, on a pioneer IR photographs Robert Wood. The sky turns black, but the clouds will seem unnaturally clear and alive. IR radiation can also penetrate into cotton clothing and cause it transparent, which is an unintended side effect that has caused several hasty redesign over the first years of digital cameras.

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effects described above apply to an almost infrared photo, ie photographs based on IR radiation closest to the visible light. On the other hand, it detects a warm infrared photo that, on the other hand, detects the heat created by the object of the photo and assigns it to the windshield of the car can appear blue, while its comcom part seems red. This druH IR photography is called thermography and has a wide range of industrial and scientific uses. Military forces use it for hidden supervision, while firefighters can use it to navigate through burning buildings. In astronomy, thermography can detect distant celestial bodies that would be invisible to normal telescopes.