Short pass filter allow the shorter wavelength throught, and cut off the longer wavelength. These filter mainly used in Beauty equipment, police multiband testing instruments, strong light flashlight, stage lighting shade, four-wheel, iris recognition system, face recognition attendance device, optical instruments.
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Parameter
| Diameter | 2mm to 200mm |
| Diameter Tolerance | +0.00/-0.1 or customer size |
| Material | N-BK7,H-K9L,Sapphire,Fused Silica(JGS1),Caf2,ZnSe,Si,Ge,etc. |
| Surface Quality | 80-50 to 10/5 |
| Flatness | 1 lambda to 1/10 lambda |
| Thickness Tolerance | +0.00/-0.05mm |
| Standard wavelength | 270nm,311、360、380、473、532、650、780、808、850、904、940、1064 and 1900nm. |
| Transmission | 7.5～11 μm: Tavg ＞90%, Tmin ＞80% 1.5～7.2μm: Tmax ＜3% |
| Transmission | 60% to 99% |
| Average blocking | 0.1%,0.01%,0.001%.0.001 |
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