Our partner Andover Corp.

Infrared neutral density filters

from Andover

Metallic-coated neutral density (ND) filters obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all-dielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce the intensity of light.

Features
  • Provides attenuation with greater linearity over a wide spectral range
  • Delivers superior durability
  • Custom substrates available

Specification

General Specifications
Dimensional Tolerances ±0.2 mm
Thickness 1.0 mm
Clear Aperture 90% of outside dimension
Surface Quality 80/50 per MIL-0-13830B
Coating Quality 80/50 per MIL-0-13830B
Coating Adherence Per MIL-M-13508C
Humidity Per MIL-STD-810F
Substrate Material Germanium
Optical Quality Flatness of 3-5 waves per inch and parallelism of 10 arc minutes or better
Mechanical Unmounted
Optional Mounted in threaded ring

 Custom IR Neutral Density Filter Specifications

      Size, Shape & Part Number
Optical
Density
Nominal
Transmittance (%)
Max. Deviation
From Nom. (%)
25 mm Ø 50 mm Ø
0.3 50.12 ± 4.0 030FNIR-25 030FNIR-50
0.5 31.62 ± 2.0 050FNIR-25 050FNIR-50
0.6 25.00 ± 2.0 060FNIR-25 060FNIR-50
0.9 12.60 ± 1.5 090FNIR-25 090FNIR-50
1.0 10.00 ± 1.5 100FNIR-25 100FNIR-50
1.3 5.00 ± 1.25 130FNIR-25 130FNIR-50
1.5 3.20 ± 0.7 150FNIR-25 150FNIR-50
2.0 1.00 ± 0.25 200FNIR-25 200FNIR-50
3.0 0.10 + 0.08/-0.05 300FNIR-25 300FNIR-50
  Set of nine filters (includes storage box)   FNIR-SET-25 FNIR-SET-50

Applications

Calibration
Attentuation
Low-Power Lasers
Scientific Measurements and Research
Machine Vision and IR Imaging Applications

Contact

Julien Dumouchel
Julien Dumouchel

Contact

Quantum Design AG

Route du Roule 41
CH-1723 Marly
Switzerland

Phone:+41 21 8699-033
E-Mail:suisse@qd-europe.com
Julien DumouchelSales Manager
+41 21 8699033
dumouchel@qd-europe.com