4.000µm Filter for Reference

Stock Reference Filter

Part Number: NBP-4000-180-25

25 mm diameter sample.

£250.00 (Free Shipping)

  • Stock Reference Filters “on the shelf” for next day shipping, 25 mm diameter x 0.5 mm thick.
  • Vortex’s trademark RockArd© deposition technology makes our filters highly durable and suitable for the toughest environments.
  • All of our filters exhibit high angular tolerance, extremely low change with temperature and very high resistance to thermal shock.

Custom Quote

For large volumes and specific enquiries please contact us.

Email: enquiries@vortexopticalcoatings.co.uk

Call: +44 (0) 1455 613029

Optical Specification

Centre Wavelength4000 nm (+/- 18nm)
FWHM180 nm (+/- 15nm)
Transmission Peak>75%
Blocking RangeUV – 20µm+
Angle Of Incidence
Substrate25 mm Diameter, 0.5 mm Thick
Surface QualityLess than 60-40 Scratch-Dig

Environmental Specification

AdhesionMIL-C-48497APara 4.5.3.1
HumidityMIL-C-48497APara 4.5.3.2
Mild AbraisionMIL-C-48497APara 4.5.3.3
Severe AbrasionMIL-C-48497APara 4.5.5.1
CleanabilityMIL-C-48497APara 4.5.4.2
Water SolubilityMIL-C-48497APara 4.5.5.3

Spectral Performance

Suitable Detectors

These Filters are suitable to be used in Lead Selenide (PbSe), Mercury Cadmium Telluride (MCT) and Boltometer type detectors.