The Flir Recon M24 style Monocular / Binocular Bridge System provides a helmet mounted hands-free solution for night vision or thermal applications Lightweight aluminum construction that is durable and versatile and all mechanical adjustments are ergonomically positioned for ease of use even with gloves on. Dovetail Style Connection from the monocular / binocular to the bridge and provides a solid connection.
Many night vision devices see infrared light, so an IR illuminator can light up a dark field for them without a beam you can see. Thermal works differently and doesn't need IR at all, because it reads heat. Either kind of unit can ride on this M24 bridge.
Most IR illuminators look like a small flashlight. Switched on, an 850nm unit shows a faint red glow at the lens, while a 940nm unit is close to invisible to the naked eye. Through night vision, the beam looks like a bright flashlight, which helps when the device is on your helmet.