Long-Wavelength Pass Filte

  • The long wave pass filter allows light with a wavelength greater than the set wavelength to pass through, and light with a wavelength less than the set wavelength is cut off.
  • The long wave pass filter provided by Borisun optics has the advantages of wide cut-off band, deep cut-off depth, high conversion steepness and high transmittance. It can also be widely used in spectral measurement, optical imaging system, optical imaging system and so on.
Technical parameters
Items Parameters
Material Optical grade float glass(B270) or UV fused quartz(JGS1)
Surface quality 40/20- 60/40
Effective aperture 90%
Central wavelength( λ C) Tolerance ±2%
Parallel error 30″
Dimensional error +0.0/-0.1mm
Transmitted wavefront error λ/4@633nm
Transmittance Tavg>85%
Gradient of cutting band <3%
spectral curve

In addition, We can customize the optical filters according to customer requirements or drawings.

For details, please consult:

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