Neutral Density Filters

Reflective Neutral Density Filters (ND Filters) provide a linear spectral transmission across the visible region. Reflective Neutral Density Filters control light intensity without selectively absorbing energies at specific wavelengths. They are, therefore, generally used to attenuate the intensity of a beam of light over a broad spectral region.

This property is often required to prevent saturation or damage to a wide variety of detectors and even the human eye.

Reflective ND Filters are available in standard densities of 0.3, 0.5, 0.6, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5 and 3.0. Stack them, and the total density is the sum of the density of each filter in the stack, permitting the creation of intermediate neutral density values.

Product SKUs

  • UV ND Filter, 1.5 OD, 50 mm Sq.

    Available on backorder
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    ND Filter Specifications | ND-UV-1.5-50

    Optical Density

    1.5 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    250-700 nm


    Fused Silica

    Size (mm)

    50 mm sq.

    Size Tolerance

    ± 0.5 mm


    2.5 mm

    Thickness Tolerance

    ± 0.25 mm



    Optical Coating

    Metallic alloy



    Clear Aperture



    ≤ 3 arc min.

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