SCHOTT NG Gray Glass Neutral Density (ND) Filters
SCHOTT NG Gray Glass Neutral Density (ND) Filters feature nearly constant transmittance in the visible spectrum, attenuating light through absorption. The filters are available in 6 materials, each with a thickness of 1, 2, or 3mm. Filters can be stacked to achieve custom optical densities. SCHOTT NG Absorptive Neutral Density Filters are used in a variety of machine vision, factory automation, and analytical instrumentation applications. Custom sizes from 5 to 160mm are available upon request; for more information, visit our Colored Glass Filter Manufacturing capabilities webpage. SCHOTT NG Absorptive Neutral Density (ND) Filters with precision optical density and transmission values are also available.
While SCHOTT NG Gray Glass Neutral Density (ND) Filters will provide consistent transmission values from 400 - 700nm, variations in filter lot manufacturing may lead to variations in transmission from filter to filter. Please see the table in the Technical Images tab for acceptable transmission variations for each glass type and thickness.
Click here to download SCHOTT’s colored glass filter calculation program which can be used to calculate the internal transmittance and external transmission of each SCHOTT glass type. The program can simulate the performance of individual filters with user specified thickness or of stacked filters with varying glass types and thicknesses.
|Glass Type||Thickness||Min. Transmission (%)||Max. Transmission (%)|