Security & Surveillance

The choice between an 850 nm and a 940 nm infrared LED comes down to one trade-off: brightness and range versus total invisibility. Silicon camera sensors are roughly twice as responsive at 850 nm as at 940 nm, so an 850 nm illuminator produces a brighter image and 30–50% longer effective range at equal power…

Infrared illumination at the 850 nm wavelength has become the backbone of modern night vision and surveillance lighting. This near-infrared light provides high radiant energy that silicon-based camera sensors can detect easily, while remaining almost invisible to the naked eye. By operating just beyond the visible spectrum, an 850 nm IR LED offers a powerful…

An infrared illuminator is a near-infrared (NIR) light source — typically built from arrays of 850 nm or 940 nm LEDs — that floods a scene with invisible light so cameras can see in the dark while remaining undetectable to human observers. For security camera integrators and OEM designers, the IR illuminator is the component…

Surveillance imaging in the dark relies on infrared LED illuminators — light the camera can see but the human eye cannot. The wavelength sets the trade-off: 850 nm gives the brightest image and longest range because silicon sensors are most responsive there (at the cost of a faint visible glow), 940 nm is completely invisible…