Technology Comparison
There are various types of 'night vision' technologies available today. Some of these technologies are relatively inexpensive but they have severe limitations. Other types of night vision technology are very high end, but can cost thousands of dollars. Here we will explain the three most popular types of night vision technology and try to help you determine which best suit your application.
Image Intensification
Image intensification is the green grainy video that is commonly used by ground troops use during the night time. This technology amplifies existing light in a scene (stars, moonlight, etc.).
The image quality is very poor and bright lights can wash out the image. Also, it cannot penetrate adverse weather conditions (rain, snow, smoke, haze, and dense fog).
Infrared Illuminators
Infrared illuminators project an active infrared beam (like a flashlight) that shines on objects making them visible in the infrared wavelength.
Infrared Illuminators are limited to how far they can see. Some manufactures claim that they can see much further, which may be true, but they dramatically reduce the frame rate of the image to increase the range performance. Also by projecting an infrared beam you are revealing the location of your camera to anyone that is able to see in the IR wavelength. Also Illuminators cannot see in adverse weather (rain, snow, smoke, haze, and dense fog).
Thermal Imaging
Thermal imaging (FLIR technology) can see in total darkness and through almost any weather condition 24 /7.
Thermal imaging cameras can penetrate almost any weather condition including rain, snow, smoke, haze, and dense fog. External light sources that shine directly into the camera do not affect the image at all. The range performance of the cameras are based on the lens and detector options.