Bandpass filter

The center wavelength (CWL) of a bandpass filter is the wavelength at the center of the passband. The peak transmission (T) is the wavelength of light at maximum transmission. Finally, the full width at half maximum (FWHM) is the bandwidth at 50% of the maximum transmission.Sometimes cut-on and cut-off wavelengths are used to describe the filter’s passband instead of FWHM and CWL.

Please contact us with your specific requirements

• Product name	Bandpass filter
  CWL	245-1064nm
  FWHM	5nm；10nm; 20nm; 30nm, 50nm or custom
  Blocking wavelength	200-1200nm
  Optical density:	OD3; OD4; OD5; OD6
  Diameter&Tolerance	0.5-600±0.02mm
  Clear Aperture	≥90%
  Thickness&Tolerance	0.3-50mm±0.02mm
  Surface flatness	1/10Lambda
  Surface quality	80/50 60/40 40/20 20/10
  Beveling	45°×0.1-0.3mm
  Coating	Hard Coated