UV Neutral Density Filters

These neutral density filters consist of a thin Inconel alloy film applied to a UV fused silica substrate.  Inconel has a broad neutral transmittance and UV fused silica transmits down to about 200nm wavelength.   The filters work well across the UV and visible spectrum. They are durable and will withstand moderate power UV lamps.

These filters are available in a range of optical densities (specified at 250nm) as follows:

0.04, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5, 3.0, 4.0

Sizes are normally, 12.7 or 25.4mm diameter or 50.8mm square.

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