Passive IR uses artificial illumination to see in low light conditions. Note that I said low light conditions.
FLIR is a common term used for what others call a 'thermal' sight. This type of sight allows the users to see via the heat radiated by the objects. It is much better than passive sights as FLIR does not require illumination and can allow the operator to see through smoke and fog.
Here is a very good history on the subject, plus a kewl army video!
http://www.nvl.army.mil/history.html
HEre is another website for history on NODS;
http://www.globalsecurity.org/milita...ground/nvg.htm
and a couple more that explain the difference with pictures;
http://www.gunsamerica.com/blog/nigh...-can-hurt-you/
http://www.infrared1.com/ANIR.html
http://en.wikipedia.org/wiki/Night_vision
Quote:
Originally Posted by DigTw0Grav3s
What's the difference between FLIR and passive IR?
|