Band pass Filter

Band pass Filter


 Bandpass filters are optical elements that are designed to transmit a specific spectral band with high efficiency, while reject others. The characteristics of the bandpass are controlled by multilayer dielectric coatings

Tavg<0.1% @ 300nm~600nm & 730nm~1100nm
T>80% @ 650nm~680nm AOI=0Deg
 

 Capability

Common Specification
Material N-BK7, Fused Silica, Color Glass Filter or according to the requirement
Dimension tolerance ± 0.20 mm
Diameter tolerance +0/-0.2mm
Thickness tolerance ± 0.20 mm
Clear Aperture >85%
Parallelism <3 arc minutes
Flatness 2 lambda
Surface quality  S/D 80-50
Bevel 0.2mmx45°
Coating Band Pass Filter Coating (IAD method)
Coating Type, wavelength according to the requirement
FWHM 20nm (according to the wavelength)
Peak Trnasmission 20%-85% (according to the wavelength)
Blocking Wavelength Range 210nm-1200nm
Optical Density OD>4 (according to the requirement)
Description Transmission Blocking Range
SP450 >90%@399-443 OD4@460-777
SP488 >90%@380-484 OD4@502-844
SP510 >90%@401-511 OD4@541-813
SP540 >90%@394-541 OD4@558-810
SP560 >90%@388-556 OD4@598-693
SP650 >90%@393-643 OD4@706-1010
SP700 >90%@400-690 OD4@720-900
SP710 >90%@435-699 OD4@745-1200
SP715 >90%@481-711 OD4@767-880
SP863 >90%@430-854 OD4@900-1200
SP890 >90%@592-878 OD4@921-1123
SP980 >90%@500-970 OD4@1023-1200
SP1040 >90%@500-1055 OD4@1060-1200
SP1110 >90%@891-1086 OD4@1135-1200