NDFilters

Neutral Density Filters & Filter Sets

Neutral Density Transmittance Filter Sets

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Neutral density filters are useful in the calibration of photometric, spectrophotometric, or radiometric systems. Calibrated filters are used to assess the dynamic range of detectors and optical systems. A set of transmittance standards offers a convenient way of checking the performance of any spectrophotometer.

Avian Technologies offers three types of filter:

  • Schott Glass (TFS-NDG)
  • Metal (Inconel) on Glass (TFS-ND)
  • Metal on Quartz (TFS-NDU)

Filters are available in two formats

  • 2” square
  • Standard 10mm cuvettes, canted to eliminate inter-reflection error

Our filters are aged in an oxidizing atmosphere to aid in long-term stability.

Stock Neutral Density Filter Sets

Sets are calibrated with tabular data at 20 nm intervals and digital data at 1 nm intervals, traceable to NRC/NIST. All sets come boxed.

We also offer custom sets and single filters; contact us to discuss your specific application.

TFS-ND-03-cuv

Neutral Density Filter Sets – Inconel on Optical Glass
Three cuvette format neutral density filters
Nominal densities of 0.3, 0.5, and 1.0 OD
Calibrated over the range of 400-2000 nm

TFS-ND-06-02

Neutral Density Filter Sets – Inconel on Optical Glass
Six 2" square neutral density filters
Nominal densities of 0.03, 0.1, 0.3, 0.5, 1.0, and 2.0 OD
Calibrated over the range of 400-2000 nm

TFS-ND-06-cuv

Neutral Density Filter Sets – Inconel on Optical Glass
Six cuvette format neutral density filters
Nominal densities of 0.03, 0.1, 0.3, 0.5, 1.0, and 2.0 OD
Calibrated over the range of 400-2000 nm

TFS-NDG-03-02

Neutral Density Filter Sets – Glass
Three 2" square neutral density filters
Nominal densities of 0.3, 0.5, and 1.0 OD
Calibrated over the range of 360-780 nm

TFS-NDG-06-02

Neutral Density Filter Sets – Glass
Six 2" square neutral density filters
Nominal densities of 0.1, 0.3, 0.5, 0.6, 1.0, and 2.0 OD
Calibrated over the range of 360-780 nm

TFS-NDU-03-02

Neutral Density Filter Sets – Metal on Fused Silica
Three 2" square neutral density filters
Nominal transmittance of 0.3, 0.5, and 1.0A
Calibrated 250-700 nm

TFS-NDU-03-cuv

Neutral Density Filter Sets – Metal on Fused Silica
Three cuvette format neutral density filters
Nominal transmittance of 0.3, 0.5, and 1.0A
Calibrated 250-700 nm

TFS-NDU-04-cuv

Neutral Density Filter Sets – Metal on Fused Silica
Three cuvette format neutral density filters
Nominal transmittance of 0.04, 0.3, 0.5, and 1.0A
Calibrated 250-700 nm

TF-NDG-xx-02c

Individual Transmittance Neutral Density Filter – Glass
Calibrated 360-780 nm
xx = specify nominal density

TF-NDU-xx-02c

Individual Transmittance Neutral Density Filter – Metal on Fused Silica
Calibrated 250-700 nm
xx = specify nominal density

TF-ND-xx-02c

Individual Transmittance Neutral Density Filter – Inconel on Optical Glass
Calibrated 400-2000 nm
xx = specify nominal density

Custom

Custom products are our specialty!
Contact us for more information.