Neutral Density Filter-25.4mm

Neutral density filters can be absorptive or reflective. These filters uniformly attenuate transmission across a specific spectrum by absorbing or reflecting non-transmitted light. As a result, they are used in imaging applications to prevent damage or inaccuracies caused by excessively intense light, such as in cameras, photometers, and light control applications. These filters are available for the UV, visible, NIR, and IR spectral regions, with a range of optical densities (0.1–3).

Material: Schott glass, N-BK7, FS

Dimension Tolerance: +0.0 / -0.2 mm

Surface Quality: 60/40

Clear Aperture: >90%

Flatness: <2λ @ 632.8 nm

Parallelism: <5 arc minutes

Chamfer: Protective <0.5mm × 45°

OD Tolerance: OD ±10% @ Design Wavelength