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Metallic Neutral Density filters comprise a thin metallic layer on a borosilicate glass or UV grade fused silica polished window.  Metallic ND filters attenuate the light by reflection and thus avoid the possible heating issues with glass and gelatine neutral density filter types.  However care must be taken to ensure the reflected light does not cause problems.  

Our stock range of visible/IR range of Metallic Neutral Density Filters are coated on low-expansion borosilicate glass substrates and cover the range from 350-2500nm. Our UV range of Metallic Neutral Density Filters are coated on UV grade fused silica and therefore cover the useful UV region down to 170nm.

We stock uncoated borosilicate or equivalent and UV fused silica substrates so custom Metallic filters can be supplied to your specific request. Please contact our technical sales team with your requirements.

Material:
Blocking Range:
OD Tolerance
Diameter:

Length/Width:
Thickness:
Clear Aperture:
Flatness:

Parallelism:
Surface Quality:

Borosilicate (LEGB) or equivalentUV fused silica
400-700nm
±5% average over blocking range
+0/-0.2 mm
± 0.2 mm
± 0.1 mm
90%
<2λ
<1 arc min
<60/40

Mounting of diameters and squares.
Antireflective coatings can be applied to one or both faces for improved transmission.
Cutting down or edged to special shapes and sizes at short notice.
Larger sizes are available.
Custom OD values to your specific requirement.
Available in sets, supplied in a wooden storage box for research and laboratory use.

56 Items

Name Optical Density Transmission (%) Diameter (mm) Length (mm) Width (mm) Thickness (mm) Material/Equivalent Type Price Buy
FNM00325 pdf 0.03 93 25 2 Borosilicate Uncoated Borosilicate
US$26.69
FNU00325 pdf 0.03 93 25 2 UV Fused Silica Uncoated UV Fused Silica
US$30.27
FNM00350 pdf 0.03 93 50 50 2 Borosilicate Uncoated Borosilicate
US$40.45
FNU00350 pdf 0.03 93 50 50 2 UV Fused Silica Uncoated UV Fused Silica
US$48.93
FNM0125 pdf 0.1 79 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0125 pdf 0.1 79 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0150 pdf 0.1 79 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0150 pdf 0.1 79 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0225 pdf 0.2 63 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0225 pdf 0.2 63 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0250 pdf 0.2 63 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0250 pdf 0.2 63 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0313 pdf 0.3 50 12.5 2 Borosilicate Metallic ND Filter
US$22.94
FNU0313 pdf 0.3 50 12.5 2 UV Fused Silica Metallic ND Filter
US$30.58
FNM0325 pdf 0.3 50 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0325 pdf 0.3 50 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0350 pdf 0.3 50 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0350 pdf 0.3 50 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0425 pdf 0.4 40 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0425 pdf 0.4 40 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0450 pdf 0.4 40 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0450 pdf 0.4 40 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0513 pdf 0.5 32 12.5 2 Borosilicate Metallic ND Filter
US$22.94
FNU0513 pdf 0.5 32 12.5 2 UV Fused Silica Metallic ND Filter
US$30.58
FNM0525 pdf 0.5 32 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0525 pdf 0.5 32 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0550 pdf 0.5 32 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0550 pdf 0.5 32 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0625 pdf 0.6 25 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0625 pdf 0.6 25 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0650 pdf 0.6 25 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0650 pdf 0.6 25 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0725 pdf 0.7 19 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0725 pdf 0.7 19 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0750 pdf 0.7 19 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0750 pdf 0.7 19 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM0825 pdf 0.8 16 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU0825 pdf 0.8 16 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM0850 pdf 0.8 16 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU0850 pdf 0.8 16 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM1025 pdf 1 10 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU1025 pdf 1 10 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM1050 pdf 1 10 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU1050 pdf 1 10 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM1525 pdf 1.5 3.2 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU1525 pdf 1.5 3.2 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM1550 pdf 1.5 3.2 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU1550 pdf 1.5 3.2 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM2025 pdf 2 1 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU2025 pdf 2 1 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM2050 pdf 2 1 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU2050 pdf 2 1 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21
FNM3025 pdf 3 0.1 25 2 Borosilicate Metallic ND Filter
US$34.40
FNU3025 pdf 3 0.1 25 2 UV Fused Silica Metallic ND Filter
US$64.98
FNM3050 pdf 3 0.1 50 50 2 Borosilicate Metallic ND Filter
US$53.52
FNU3050 pdf 3 0.1 50 50 2 UV Fused Silica Metallic ND Filter
US$103.21

56 Items

1

Metallic Neutral Density Filters

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