Material:BK7 grade A optical glass
Design Wavelength:632.8nm.
Design Index : n=1.5147
Surface Figure: x:?/2; y:2?
Dimension Tolerance: ?.2mm
Paraxial Focal Length:?%
Centration :3 arc minutes
Clear Aperture :>80%
Surface Quality: 60-40 scratch and dig
Bevel: 0.25 mm ?45?
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