Long wave dichroic filter

  • Dichroic spectroscopic filter can be used to transmit wavelengths longer than the starting wavelength or shorter than the cut-off wavelength. It is divided into long wave pass filter and short wave pass filter.
  • Dichroic spectrograph can be used in fluorescence excitation spectrum analysis, beam separation, beam combination and other occasions.
Technical parameters
Items Parameters
Material Optical grade float glass (B270)
Surface quality 40/20- 60/40
Effective aperture 90%
Center wavelength (CWL) 425nm, 450nm, 500nm, 550nm, 600nm, 650nm, 700nm, 750nm, 800nm, 850nm
Reflection waveband 370~400nm, 370~430nm, 370~480nm, 385~520nm, 460~570nm, 495~615nm, 535~665nm, 565~715nm, 600~760nm, 635~810nm
Transmission waveband 440~1200nm, 465~1200nm, 515~1200nm, 565~1200nm, 620~1200nm, 670~1200nm, 720~1200nm, 770~1200nm, 820~1200nm, 870~1200nm
Dimensional error +0.0/-0.1mm
Central wavelength( λ C) Tolerance ± 10nm transmittance
Transmitted wavefront error λ/4@633nm
Reflectivity Ravg>98%
Incident angle 45°
spectral curve

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

For details, please consult:

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