Filters Metallic Coated Neutral Density Filters

Metallic Coated Neutral Density Filters

• BK7 Optical Glass
• Fused Quartz

Metallic coated ND filters are glass or quartz substrates with a precision metallic coating (Inconel) that provides uniform attenuation across a wide spectral range. Some advantages of metallic coated ND filters include:

• Coating on quartz allows controlled attenuation in the UV.
• Coating provides attenuation with greater linearity over a wide spectral range.
• Can handle higher intensity light sources because part of the beam is reflected rather than absorbed.

The film is comprised of a very hard alloy material that is resistant to aging under normal conditions. Use at high temperatures can cause oxidation however, and is not recommended. Any commercial cleaning solution can be used to clean these filters.

NOTE: Use of any of these neutral density filters with high power lasers or other extreme light sources can cause catastrophic failure and is not recommended.