Infrared optical filter GCC-3020 series

visible lightvariable neutral-densitybroadband

This ND filters provides linearly varying attenuation or beamsplitting in the visible and near infrared region. The optical density varies linearly across the length.Attenuation is achieved by a thin film of Ni-Cr-Fe protected with an overcoat of SiO. The rear surface is broadband AR coated for the visible region. •Dimension Tolerance: +0.0/-0.2 •Clear Aperture: 90% of length and 80% of width •Optical Density(OD): 0.8-2.0±5%@632.8nm •Linearity of Optical Density: ±5% •Coating: S1:Ni-Cr-Fe S2:Broadband AR coated, Rave<0.5% for 420-675nm at 0-15º incidence.