https://www.lasermet.com/us/project/the-optical-table-laser-guarding-system-nlp/
The Optical Table Laser Guarding System: an NPL-Lasermet joint venture product - Lasermet USA
Optoblok, the Optical Table Laser Guarding System is designed specifically to reduce the risk of stray laser beams being inadvertently directed at personnel
optical table laser guarding