The signal from the voltage divider is monitored for a change when the laser beam is broken. [over9k] set things up so that a webcam snaps a picture of the intruder and Twitters the event for easy ...

The USS Preble is the only U.S. destroyer armed with the HELIOS, which can fire laser beams to destroy fast attack craft and drones.

Cutting-edge video and control technology supplement structural security measures ... The integrated multi-kilowatt laser is used for studies of laser safety in open spaces, beam propagation through ...