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By certification 
Design Wavelength:632.8nm
Diameter Tolerance:+0.0/-0.1mm
Flatness:λ/4@632.8nm
Surface Quality:40-20
Centration:<3'
Clear Aperture:>90%
Bevelling:<0.2×45°
Coating:AR and Reflect coating
A:350-650nm
B:650-1050nm
C:1050-1580nm
Diameter Tolerance:+0.0/-0.1mm
Flatness:λ/4@632.8nm
Surface Quality:40-20
Centration:<3'
Clear Aperture:>90%
Bevelling:<0.2×45°
Coating:AR and Reflect coating
A:350-650nm
B:650-1050nm
C:1050-1580nm
