Schott N-WG320

The 2mm thickness was exactly what my collimator needed for precise alignment. Cut-off performance is sharp and clean across my test wavelengths—no surprises there. Just a solid, dependable filter that does exactly what the spec sheet promises.

Installed this in my optical setup and the 2mm thickness made it easy to mount without any extra spacers. Cut-on performance is spot-on for my application.

Cut-on is right where I needed it and the glass looks clean, no visible striae or coating haze. The 2mm thickness fits my filter holder without any shimming, which saved me a bit of fiddling. Transmission through the passband is noticeably better than the dyed filter I was using before.