Northumbria Optical Coatings Ltd

Order Sorting

Blocking and order sorting filters are frequently used in measuring equipment to suppress unwanted wavelengths. These filters have long wave pass characteristics and are supplied in 3.3mm thick standard holders.

Typical Performance


Typical Characteristics

  • Diameter: 25mm
  • Thickness: 3.3mm
  • Clear aperture: 21mm
  • Lower wavelengths fully blocked
  • Mounted in standard holders
  • Discounts available for larger quantities.
  • Alternative wavelengths available on request.
Part No. Tx(5%) edge position Tpk (min) Tx (ave) Range
OS-1250 1.04µm ±4% 90% > 75% 1.25 to 2.00µm
OS-2000 1.90µm ±4% 80% > 70% 2.00 to 4.00µm
OS-3600 3.32µm ±4% 80% > 70% 3.60 to 6.50µm
OS-6000 5.55µm ±4% 80% > 70% 6.00 to 10.5µm
OS-10500 9.75µm ±4% 80% > 70% 10.50 to 18.00µm
OS-17000 16.20µm ±4% 70% > 60% 17.00 to 22.00µm


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