Material H-K9L Grade A
Surface Quality 40-20 scratch & dig
Surface Flatness λ /2@633nm
Clear Aperture 80% of the face size
90° Angle Tolerance ± 2 arcmin
Pyramidal Tolerance ± 1 arcmin
Dimensions Tolerance ± 0.1
Bevel 0.3× 45°
Surface Quality 40-20 scratch & dig
Surface Flatness λ /2@633nm
Clear Aperture 80% of the face size
90° Angle Tolerance ± 2 arcmin
Pyramidal Tolerance ± 1 arcmin
Dimensions Tolerance ± 0.1
Bevel 0.3× 45°
Main Products
optcal lenses, optical mirrors, telescope lenses