Laser scanner
A laser scanner was a technological device, utilizing laser technology, that, connected to a modified plasma inverter, could produce a plasma shock. 

In 2368, Geordi La Forge combined the two devices and, through a small hole created by means of a micro-optic drill, was able to send enough plasma through the hole to temporarily plasma shock Deanna Troi and Miles O'Brien, who had been taken over by Ux-Mal criminals. ()

nl:Laserscanner
Scans
Sensor technology