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Location: Main > Optical Filters > Edgepass Filters > EPF-SP-640-10UM-0.7
Name: DIA25.4x0.7mm 640nm Shortpass Glass Filter
P/N: EPF-SP-640-10UM-0.7
Keywords:640nm cut-off,Dia25.4x0.7mm,Shortpass,HT@400-634nm
Unit Price: S$125.00/pc
Available: In stock
Request: Add to Request List
Introduction:
Short Pass Filter is Useful for isolating short wavelength regions of the spectrum. Unlike colored filter glass, the cut-on and cut-off wavelength of long pass filters and short pass filters will shift to a shorter wavelength as the angle of incidence is increased. This feature can be useful in applications where it is desirable to fine tune the location of the cut-on, or cut-off wavelength. In addition, our edgepass filters are hermetically sealed to provide maximum humidity protection, and they can be stacked to create a custom bandpass filter.
Shortpass filter transmission region is 0.7 x Cut-off-Wavelength to Cut-off-Wavelength (Unless 0.7 x Cut-off-Wavelength is < 400 nm, then 400 nm to Cut-off-Wavelength).
Shortpass filter rejection region is 1.3 times Cut-off-Wavelength.

Substrate Material:
Schott D263 glass (t0.7mm polished)
Outer Diameter:
Dia 25.4,-0.2/+0.0mm, un-mounted with clear aperture >Dia 22.0mm
Thickness:
0.70+/-0.05mm (un-mounted)
Scratch/Dig:
60-40 S/D per Mil-0-13830A
Surface Flatness:
<lambda/4 @ 633nm over aperture (19mm in diameter)
Construction:
Full Dielectric Coating; Dichroic mirrror designed
Transmission Region:
400 ~ 634nm
Transmission:
T>80% min(typ.); Average T>90% @400-634nm
Note: T>91% @ 632.8nm (0-deg AOI)
Cut-off Wavelength(3dB point):
640nm(full dielectric coating design)
Rejection Region:
650-950nm, OD>4(T<0.01% abs). OD>5 average
Note: T<0.005% @680nm (0-deg AOI)
Back Surface:
Polished/uncoated; 60-40S/D,<lambda/4 @ 633nm over aperture (19mm in diameter)