Thorlabs offers a complete selection of blackout materials that are designed to control stray or ambient light, which can adversely affect experiments or components within a setup (e.g. photodetectors). These materials are especially beneficial when using high-gain detection equipment, such as
Laser Blocking Curtains
Safety of Class 4 visible-beam lasers
Laser Safety Barriers
Blackout and Laser Safety Materials
BlackOutTM Material Acktar Black Coating
Laser Beam Hazard ⋆ Safety Path
Spectroelectrochemical and Chemical Evidence of Surface Passivation at Zinc Ferrite (ZnFe2O4) Photoanodes for Solar Water Oxidation - Liu - 2021 - Advanced Functional Materials - Wiley Online Library
Optics: What is a good, non-perishable, non-toxic, dissolvable scattering agent to make lasers and other light sources visible in water? - Quora
Removable Laser Safety Window Blocks
Laser Safety Curtains
Laser Barrier Curtains, Up to 2150 W/cm2 for 100 sec
Class Laser Safety Screen Retail Stores