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Absorptive Neutral Density Filters
商品货号:ECS000772
商品品牌:Thorlabs
详细介绍

Features

  • Ideal for Low Power Applications (<1 Watt)
  • Absorptive Glass Eliminates Multiple Reflections
  • Ø1/2", Ø1", 2" x 2" Sizes Available
  • Optical Density Tolerances <5% @ 633 nm

Thorlabs' Absorptive Neutral Density (ND) Filters (unlike metallic filters) are manufactured from a family of Schott glasses that have varying internal absorption coefficients. Each glass has a unique absorption and produces spectrally flat transmission. By differing filter thicknesses we are able to manufacture this series of neutral density filters. All data is specified at 633 nm.

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

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

Our absorptive ND filters have optical densities ranging from 0.1 to 5.0. Choosing an ND filter with a higher optical density, ND, will translate to lower transmission and greater absorption of the incident light. For higher transmission and less absorption, 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 absorptive neutral density filters. For lab safety, Thorlabs offers an extensive line of safety and blackout products that significantly reduces exposure to stray light.

An unmounted and SM1 Lens Tube mounted version of our Ø1" filters are available. The mounted version is compatable with a wide range of ridged construction optomechancial parts such as our cage system and lens tubes. Please refer to the Accessories Tab above for other mounting options.

Thorlabs Ø1" and 2" x 2" absorptive ND filters are also offered in filter kits. Each kit contains 1 filters in the following optical densities: 4.0, 3.0, 2.0, 1.0, 0.6, 0.5, 0.4, 0.3, 0.2, and 0.1.

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