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Bandpass Filters

Bandpass Interference filters selectively transmit a narrow range of wavelengths while blocking all others, are widely used in instrumentation for clinical chemistry, environmental testing, , laser line separation etc. Interference filters are often used in conjunction with laser diodes and LEDs.
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Specification:
Materials:BK7 optical glass and fused silica etc
Diameter Tolerance: +/-0.5mm
Thickness < 6.00mm
Parallelism < 3arc minute
Surface Quality: 20-10/40/-20/60-40/80-50
Surface Figure: 入/10
Peak Transmission >60% 
Clear Aperture > 8.0 mm, 20.0 mm & 45.0 mm for 0.50”,1.00” & 2.00” diameter filters, respectively 
Coating:Specified by customers
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