Andover -Infared Neutral Density Filters

Metallic-coated infrared neutral density filters (IR ND filters) obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all-dielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light.  Andover`s IR ND filters exhibit outstanding spectral neutrality, outperforming all others on the market.