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

Ing. Fabrizio Renzi
Ing. Fabrizio Renzi

Contact

Quantum Design s.r.l.

Via Francesco Sapori, 27
00143 Roma
Italy

Phone:+39 06 5004204
Fax:+39 06 5010389
E-mail:italy@qd-europe.com
Fabrizio RenziProduct Manager
+39 06 5004204
renzi@qd-europe.com