1,Material:BK7 grade A optical glass 2,Angle tolerance:5 arc sec-3 arc min 3,Optical parallelism:5arc seconds-1 arc minutes

instrument optical windows

Material:BK7 grade A optical glass

Size:Dia 3.0~200.0mm  x  thickness  0.3~60.0mm 

Dimension tolerance:0/-0.1mm

Thickness Tolerance:±0.2mm

Angle tolerance:5 arc sec—3 arc min

Optical parallelism:5arc seconds—1 arc minutes

Flatness(@633nm):λ/20—1λ

Surface quality:20—10scratch and dig

Clear aperture:90%

Coating:available upon request

instrument optical windows