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Metallic Neutral Density Filters
商品货号:ECS000773
商品品牌:Thorlabs
详细介绍

Thorlabs Metallic Ø1" Neutral Density (ND) Filters provide a uniform attenuation over a broad spectral range. These filters have a BK7 glass substrate and are metal (Inconel)coated. The Inconel film is a very hard metallic alloy that is resistant to aging under normal conditions. The Inconel coating will oxidize at elevated temperatures; it is recommended that the Neutral Density filters be used at temperatures below 100oC. The use of an Inconel coating ensures that the spectral response of these Neutral Density filters is very flat from the UV out to the Mid-IR.

The optical density, D, is defined by the following equation


D = log10 (1/T), or T = 10-D

The non-transmitted light is reflected. For lab safety, Thorlabs offers an extensive line of safety and blackout products that significantly reduces exposure to stray or reflected light.

Our metallic ND filters have optical densities ranging from 0.1 to 4.0. Choosing an ND filter with a higher optical density, D, will translate to lower transmission and greater reflection of the incident light. For higher transmission and less reflection, a lower optical density, D, would be appropriate. Refer to the Specs Tab above for detailed information about the average transmission obtained with each of our metallic neutral density filters.

For your convenience, we offer both unmounted and mounted ND filters. The ND filters are mounted in stackable SM1 lens tube mounts that make them compatible with all the SM1 optical mounts made by ThorLabs, including the SM1 lens tubes and SM1 threaded cage plates.

Thorlabs Metallic ND filters are also offered in a 10 filter kit that contains one 4.0, 3.0, 2.0, 1.0, 0.6, 0.5, 0.4, 0.3, 0.2, and 0.1 optical density filter each. The filters are mounted in stackable SM1 lens tube mounts.

 

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