Do contiguous laser curtains exists? and if not are there any lenses that could spread a concentrated beam into a "planar" beam - Engineering Stack Exchange
China Laser Curtain (SPL-G-501) - China green laser rain, stage light
Laser Screens & Curtains
Single-layered Curtain - laservision USA
Laser Curtain
Kentek LAZER-GUARD All-Metal Laser Curtain Systems
Laser light curtain, Laser light barrier - All industrial manufacturers