Metallic ND Filter, UV Fused Silica, 25.4 mm, 0.2 OD at 632.8 nm

Ø25.4 mm

350 - 2000 nm

0.2

±7% @ 632.8 nm

63.1% @ 632.8 nm

0°

UV grade fused silica or equivalent

30 W/cm² CW, typical; not recommended for pulsed laser use

±0.25 mm

3.0 mm

±0.25 mm

≤1λ at 632.8 nm over the clear aperture

60-40 scratch-dig

≥central 80% of dimensions

≤3 arc min

0.25–0.76 mm face width

45° ±15°

MIL-C-48497A, adhesion, humidity, moderate abrasion, and solubility requirements

See How to Clean Optics