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Location: Main > Optical Filters > Edgepass Filters > EPFSI-LP-1270-R0100-0200
Name: DIA10.0xT2.0mm 1270nm Longpass NIR Filter(Silicon)
P/N: EPFSI-LP-1270-R0100-0200
Keywords:1270nm Cut-on,Dia10.0xT2.0mm,Silicon,HT@1300-1700n
Unit Price: S$105.00/pc
Available: In stock
Request: Add to Request List
Introduction:
LongPass Filters are useful for isolating wavelengths from different regions of the spectrum, allowing high transmission above the cut-on wavelength (in the pass band), and high reflection below the cut-on wavelength (in the blocking band). Long PassFilters coating's construction is essentially a modified quarter-wave stack, using interference effects rather than absorption, to isolate their spectral bands. The durable dielectric coating of LongPass Filters makes them instrumental in many industrial and Research & Development applications, due to the rejection band optical density of 3.0 and >85% transmission above the cut-on wavelength.

LongPass Filters characteristics may be customized upon customers' request.

LongPass Filter transmission region is Cut-on-Wavelength to 2200 nm (Min).
LongPass Filter rejection region is 200 nm to Cut-on-Wavelength.

Substrate Material:
Silicon, IR grade
Outer Diameter:
Dia 10.0,-0.1/+0.0mm,unmounted
Thickness:
2.0, +/-0.1mm
Scratch/Dig:
60/40 per Mil-0-13830A
Parallelism:
<1 arc minute
Surface Flatness:
<lambda/4 @ 633nm over clear aperture (8mm)
Construction:
Immersed Dielectric; AOI: 0 ~ 10 degrees
Front surface: longpass dielectric coating
Back surface: AR coating @ 1200-2000nm
Transmission Region:
1300 ~ >1700nm (0 ~10deg AOI)
R>80% @ 1300nm; R>97% @ 1400nm and above
Cut-on Wavelength:
1270 +/-5nm
Cut-on Tolerance
(Delta Lambda @ 50% of Peak)
+/-5nm
Rejection Region:
OD>5 @200 -1200nm;
Edge Surface:
Clear polished with 0.2mm bevelled
Chipping Control:
<0.1mm