johnnyyy 0 Posted February 14, 2014 (edited) Does anyone knows how IR sensor work in regular night vision security camera? Edited February 15, 2014 by Guest Share this post Link to post Share on other sites
varascope 0 Posted February 14, 2014 Are your referring to: how the IR filter works with the IR lighting? This is the sensitivity to the IR light range 800-1200nm (nanometers) Images appear different depending on the range and the sensor. Or are you referring to how the IR turns on? Share this post Link to post Share on other sites
johnnyyy 0 Posted February 15, 2014 I mean the photocell on the regular security camera panel (usually among the IR LED illustrators). How does it work and will the photocell adjust the IR LED power according to the power/light it receives? Share this post Link to post Share on other sites
varascope 0 Posted February 15, 2014 Usually it is an On/Off operation. Cameras with OSD may have intensity settings and thresholds depending on manufacturer. Those without OSD or dip switches are primarily on/off. If you cracked one open, you might find a pot that adjusts intensity. Share this post Link to post Share on other sites
myiicu 0 Posted February 16, 2014 "Smart IR" led implementations using solely photocells are not very good. Photocells are generally not very efficient and have a very slow response time around 75ms. Avigilon's "Adaptive IR" continually combines zoom and content data to get the best image. http://avigilon.com/white-papers/adaptive-ir/ Share this post Link to post Share on other sites
