LASER ALIGNMENT DEVICE ALLOWS A FAST AND RELIABLE OPTICAL ALIGNMENT OF REER SAFETY LIGHT CURTAINS; ALSO COMPATIBLE WITH THE USE OF THE FMC FLOOR MOUNTING COLUMNS. LAD DEVICES EMIT A LASER BEAM WITH VISIBLE RED LIGHT WITH USEFUL RANGE UP TO 100 M. THE USE IS RECOMMENDED FOR ALIGNING LIGHT CURTAINS THAT OPERATE OVER LONG DISTANCES OR MULTIPLE SIDES WITH THE USE OF DEFLECTING MIRRORS