Optical Filters

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Longpass Filters Product

The 3rd Millennium Longpass filters combine a patented, hermetic physical assembly with proprietary ALPHA Technology. A process which produces exceptionally steep cut-on slopes. This results in more precise location of cut-on points, the ability to place transmission and rejection regions extremely close together, and higher attenuation between the pass band and the rejection band.

Filter Type

Wavelength Range

Part Number Range

Price

Longpass 

400 - 700nm every 10nm 

3RD400LP - 3RD700LP 

£120

Longpass 

700 - 800nm every 10nm 

3RD700LP - 3RD800LP 

£128

Longpass 

800 - 1100nm every 50nm 

3RD800LP - 3RD1100LP 

£135

 Filter Specifications:

  • Assembly Diameter: 25mm
  • Tolerance : ±3nm
  • Assembly Thickness: 5.5mm
  • Blocking Range: UV to Cut-on
  • Blocking OD: OD 12 avgOD 6 min
  • Transmission : > 90% peak
  • Clear Aperture: 21.3mm
  • Substrates: SiO2 substrate with a broadband anti-reflection coating