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.
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.
| 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 |
£19.20
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| FNU00325 pdf | 0.03 | 93 | 25 | 2 | UV Fused Silica | Uncoated UV Fused Silica |
£21.78
|
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| FNM00350 pdf | 0.03 | 93 | 50 | 50 | 2 | Borosilicate | Uncoated Borosilicate |
£29.10
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| FNU00350 pdf | 0.03 | 93 | 50 | 50 | 2 | UV Fused Silica | Uncoated UV Fused Silica |
£35.20
|
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| FNM0125 pdf | 0.1 | 79 | 25 | 2 | Borosilicate | Metallic ND Filter |
£24.75
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| FNU0125 pdf | 0.1 | 79 | 25 | 2 | UV Fused Silica | Metallic ND Filter |
£46.75
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| FNM0150 pdf | 0.1 | 79 | 50 | 50 | 2 | Borosilicate | Metallic ND Filter |
£38.50
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| FNU0150 pdf | 0.1 | 79 | 50 | 50 | 2 | UV Fused Silica | Metallic ND Filter |
£74.25
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| FNM0225 pdf | 0.2 | 63 | 25 | 2 | Borosilicate | Metallic ND Filter |
£24.75
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| FNU0225 pdf | 0.2 | 63 | 25 | 2 | UV Fused Silica | Metallic ND Filter |
£46.75
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