Neutral Density Filters

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

  • ND Filter, 0.3 OD, 12.5 mm Dia.

    ND-VIS-0.3-12.5
    $24.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.3-12.5

    Optical Coating

    Inconel

    Optical Density

    0.3 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    12.5 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    21.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.3 OD, 25 mm Dia.

    ND-VIS-0.3-25
    $42.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.3-25

    Optical Coating

    Inconel

    Optical Density

    0.3 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    21.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.3 OD, 50 mm Sq.

    ND-VIS-0.3-50
    $65.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.3-50

    Optical Coating

    Inconel

    Optical Density

    0.3 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    50 mm Sq.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    21.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.5 OD, 12.5 mm Dia.

    ND-VIS-0.5-12.5
    $24.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.5-12.5

    Optical Coating

    Inconel

    Optical Density

    0.5 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    12.5 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    30.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.5 OD, 25 mm Dia.

    ND-VIS-0.5-25
    $42.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.5-25

    Optical Coating

    Inconel

    Optical Density

    0.5 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    30.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.5 OD, 50 mm Sq.

    ND-VIS-0.5-50
    $65.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.5-50

    Optical Coating

    Inconel

    Optical Density

    0.5 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    50 mm Sq.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    30.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.6 OD, 12.5 mm Dia.

    ND-VIS-0.6-12.5
    $24.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.6-12.5

    Optical Coating

    Inconel

    Optical Density

    0.6 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    12.5 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    37.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.6 OD, 25 mm Dia.

    ND-VIS-0.6-25
    $42.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.6-25

    Optical Coating

    Inconel

    Optical Density

    0.6 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    37.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.6 OD, 50 mm Sq.

    ND-VIS-0.6-50
    $65.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.6-50

    Optical Coating

    Inconel

    Optical Density

    0.6 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    50 mm Sq.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    37.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

  • ND Filter, 0.9 OD, 12.5 mm Dia.

    ND-VIS-0.9-12.5
    $24.00
    Available on backorder
    Add to cart

    ND Filter Specifications | ND-VIS-0.9-12.5

    Optical Coating

    Inconel

    Optical Density

    0.9 OD

    Density Tolerance

    ± 5% of density

    Operating Range

    400-700 nm

    Substrate

    Float Glass

    Size (mm)

    12.5 mm dia.

    Size Tolerance

    ± 0.5 mm

    Thickness

    1.5 mm nominal

    Reflection

    50.00%

    Scratch/Dig

    80/50

    Clear Aperture

    80%

    Parallelism

    ≤ 3 arc min.

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