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Protected Aluminum Mirror
Material......................................................................BK7,Fused Silica
Dimension Tolerance.............................................................±0.20 mm
Thickness Tolerance..............................................................±0.20 mm
Clear Aperture..............................................................................>90% 
Flatness........................................................................see table below
Parallelism.....................................................................<3 arc minutes
Surface Quality..........................................................................60–40 
Coating..............Protected aluminum on S1,Ravg>87%@400–800nm
P/NSizeFlatnessSubstrate
50201Φ12.7×5λ/4BK7
50202Φ25.4×5λ/4BK7
50203Φ12.7×6λ/10Fused Silica
50204Φ25.4×6λ/10Fused Silica
50205Φ12.7×6λ/20Fused Silica
50206Φ25.4×6λ/20Fused Silica
●Unit:mm
●Other sizes and coatings are available upon request.