https://www.3doptix.com/catalog/optics/beam-splitter/semrock/LM01-503-25
Optics | Beam Splitter | Semrock | LM01-503-25 25 mm Dia. 503nm Edge LaserMUX Single-Edge Laser...
"Discover the LM01-503-25 Beam Splitter by Semrock, a 25mm diameter, 2mm thick circular Thin BS designed for 503nm wavelength. Featuring UVFS MAL-1965 material...