Here’s a surprisly simple way to build yourself a laser-based listening device. It consists ... one is visible red for aiming, and the other is infrared for measuring the vibration of a surface.

Researchers led by Chinese laser expert ‘Crazy Li’ have developed a compact device capable of arming small drones with ...

A secondary low-power laser helps to visualize the main laser’s alignment without actually cutting the target. There are a couple of ways to install an aiming ... engraving a device and only ...

Automatic emissivity adjustment Heat flow or flux adjustment Laser spot aiming or sighting Battery powered A noncontact infrared temperature sensor with heat flow or flux adjustment offers features ...